Most chess games can be divided into 3 sections - the opening, the middle game, and the end game. Depending on which moves are played, the opening may take 1 move or 17 moves.
Over the centuries, chessplayers have discovered that some openings work and some openings don't. They have even devised a notation for famous chess openings known as ECO, which is short for Encyclopedia of Chess Openings. Here is a list of the more well-known openings and also some obscure ones I found. Note that there is not general agreement as to which ECO code or opening name applies to certain openings, especially those that are arrived at by transposition (i.e. 1 d4 e5 2 e4 transposes to the same opening as 1 e4 e5 2 d4). If you don't understand the notation given here, review the rules and specifically read the section on algebraic notation.
While I make every effort to be comprehensive, you should not consider this list of openings to be authoritative. I gathered this information from various sources, some of which contradict each other. In cases where an opening is known by multiple names, I have separated them with a slash. In cases where there is a dispute over which moves are included in an opening, I have included the disputed moves in brackets.
| Opening moves | ECO Code | Opening name |
|---|---|---|
| Explore | Initial Setup | |
| 1 a3 | A00 Explore | Anderssen's Opening |
| 1 a3 a5 2 b4 | A00 Explore | Anderssen's Opening-Polish Gambit |
| 1 a3 e5 2 b3 d5 3 c3 Nf6 4 d3 Nc6 5 e3 Bd6 6 f3 0-0 7 g3 | A00 Explore | Anderssen's Opening-Hippopotamus Attack |
| 1 a3 e5 2 g3 d5 3 Bg2 Nf6 4 d3 Nc6 5 Nd2 Bd6 6 e3 0-0 7 h3 | A00 Explore | Anderssen's Opening-Shy Attack |
| 1 a3 e5 2 h3 d5 | A00 Explore | Anderssen's Opening-Creepy Crawly Formation |
| 1 a3 g6 2 g4 | A00 Explore | Anderssen's Opening-Andersspike |
| 1 a4 | A00 Explore | Ware/Meadow Hay Opening |
| 1 a4 b5 (2 axb5 Bb7) | A00 Explore | Ware Opening-Wing Gambit |
| 1 a4 b6 2 d4 d5 3 Nc3 Nd7 | A00 Explore | Ware Opening-Cologne Gambit |
| 1 a4 d5 2 Nf3 | A00 Explore | Ware Opening-Potato Variation |
| 1 a4 e5 | A00 Explore | Ware Opening-King's Pawn Variation |
| 1 a4 e5 2 a5 d5 3 e3 f5 4 a6 | A00 Explore | Ware Opening-Ware Gambit |
| 1 a4 e5 2 e4 | A00 Explore | Ware Opening-Aquisap Opening |
| 1 a4 e5 2 h4 | A00 Explore | Ware Opening-Crab Opening |
| 1 a4 e5 2 Ra3 | A00 Explore | Ware Opening-Meadow Hay Trap |
| 1 b3 | A01 Explore | Nimzowitsch-Larsen Attack |
| 1 b3 b5 | A01 Explore | Nimzowitsch-Larsen Attack-Polish Variation |
| 1 b3 b6 | A01 Explore | Nimzowitsch-Larsen Attack-Symmetrical Variation |
| 1 b3 c5 | A01 Explore | Nimzowitsch-Larsen Attack-English Variation |
| 1 b3 d5 | A01 Explore | Nimzowitsch-Larsen Attack-Classical Variation |
| 1 b3 d5 2 Ba3 | A01 Explore | Nimzowitsch-Larsen Attack-Classical Variation-Graz Attack |
| 1 b3 d5 2 Nf3 | A06 Explore | Nimzowitsch-Larsen Attack-Classical Variation |
| 1 b3 e5 | A01 Explore | Nimzowitsch-Larsen Attack-Modern Variation |
| 1 b3 e5 2 Bb2 Nc6 3 e3 | A01 Explore | Nimzowitsch-Larsen Attack-Modern Variation #4 |
| 1 b3 e5 2 Bb2 Nc6 3 f4 | A01 Explore | Nimzowitsch-Larsen Attack-Modern Variation-Paschmann Gambit |
| 1 b3 e6 2 Bb2 f5 3 e4 | A01 Explore | Nimzowitsch-Larsen Attack-Ringelbach Gambit |
| 1 b3 f5 | A01 Explore | Nimzowitsch-Larsen Attack-Dutch Variation |
| 1 b3 f5 2 Bb2 e6 3 e4 | A01 Explore | Nimzowitsch-Larsen Attack-Dutch Variation-Ringelbach Variation |
| 1 b3 Nf6 | A01 Explore | Nimzowitsch-Larsen Attack-Indian Variation |
| 1 b3 Nf6 2 Bb2 g6 3 g4 | A01 Explore | Nimzowitsch-Larsen Attack-Indian Variation-Spike Variation |
| 1 b4 | A00 Explore | Polish/Orangutan/Sokolsky/Hunt Opening |
| 1 b4 b5 | A00 Explore | Polish Opening-Symmetrical Variation |
| 1 b4 b5 2 c4 | A00 | Polish Opening-Husky's Gambit |
| 1 b4 c5 | A00 Explore | Polish Opening-Birmingham Gambit |
| 1 b4 c6 | A00 Explore | Polish Opening-Outflank Variation |
| 1 b4 c6 2 Bb2 a5 3 b5 cxb5 4 e4 | A00 Explore | Polish Opening-Outflank Variation-Schuehler Gambit |
| 1 b4 c6 2 Bb2 Qb6 3 a3 a5 4 c4 | A00 Explore | Polish Opening-Katalymov Gambit |
| 1 b4 c6 2 Bb2 Qb6 3 a3 a5 4 c4 d6 | A00 Explore | Polish Opening-Katalymov Gambit-Katalymov-Jepisjin Variation |
| 1 b4 d5 2 Bb2 Bf5 | A00 Explore | Polish Opening-Baltic Defence |
| 1 b4 d5 2 Bb2 c6 3 a4 | A00 Explore | Polish Opening-Myers Variation |
| 1 b4 d5 2 Bb2 d4 3 Nf3 c5 | A00 Explore | Polish Opening-Labahn Gambit |
| 1 b4 d5 2 Bb2 Qd6 | A00 Explore | Polish Opening-German Defence |
| 1 b4 d5 2 Bb2 Qd6 3 a3 e5 4 e4 dxe4 5 f3 | A00 Explore | Polish Opening-German Defence-Orangutan-Diemer Gambit |
| 1 b4 e5 2 a3 | A00 Explore | Polish Opening-Bugayev Attack |
| 1 b4 e5 2 Bb2 Bd6 | A00 Explore | Polish Opening-Stabenow Variation |
| 1 b4 e5 2 Bb2 Bxb4 | A00 Explore | Polish Opening-Kucharkowski-Meybohm Gambit |
| 1 b4 e5 2 Bb2 c5 | A00 Explore | Polish Opening-Wolferts Gambit |
| 1 b4 e5 2 Bb2 d6 | A00 Explore | Polish Opening-Czech Defence |
| 1 b4 e5 2 Bb2 f6 3 b5 | A00 Explore | Polish Opening-Bugayev Advance Variation |
| 1 b4 e5 2 Bb2 f6 3 e4 | A00 Explore | Polish Opening-Tartakower Gambit |
| 1 b4 e5 2 Bb2 f6 3 e4 Bxb4 | A00 Explore | Polish Opening-Tartakower Gambit-Polish/Sokolsky Gambit |
| 1 b4 e5 2 Bb2 f6 3 e4 Bxb4 4 Bc4 Nc6 5 f4 Qe7 6 f5 g6 | A00 Explore | Polish Opening-Tartakower Gambit-Polish Gambit-Brinckmann Variation |
| 1 b4 e5 2 e4 Bxb4 3 f4 exf4 | A00 Explore | Polish Opening-Lewin Double Gambit |
| 1 b4 e6 2 Bb2 f5 3 e4 | A00 Explore | Polish Opening-Schuffler Gambit |
| 1 b4 f5 | A00 Explore | Polish Opening-Dutch Defence |
| 1 b4 Nc6 | A00 Explore | Polish Opening-Grigorian/Aasum Variation |
| 1 b4 Nf6 2 Bb2 d5 3 e3 e6 4 b5 | A00 Explore | Polish Opening-Schiffler-Sokolsky Variation |
| 1 b4 Nf6 2 Bb2 e6 3 a3 c6 4 d3 a5 5 bxa5 d5 6 e4 | A00 Explore | Polish Opening-Orangutan-Hartlaub Gambit |
| 1 b4 Nf6 2 Bb2 e6 3 b5 a6 | A00 Explore | Polish Opening-Queenside Defence |
| 1 b4 Nf6 2 Bb2 e6 3 b5 a6 4 a4 axb5 5 axb5 Rxa1 6 Bxa1 | A00 Explore | Polish Opening-Queenside Defence-Rooks Swap Line |
| 1 b4 Nf6 2 Bb2 e6 3 b5 b6 | A00 Explore | Polish Opening-Queen's Indian Variation |
| 1 b4 Nf6 2 Bb2 g6 | A00 Explore | Polish Opening-King's Indian Variation |
| 1 b4 Nf6 2 Bb2 g6 3 c4 Bg7 4 e3 d6 5 Nf3 0-0 6 d4 | A00 Explore | Polish Opening-King's Indian Variation-Sokolsky Attack |
| 1 b4 Nf6 2 Bb2 g6 3 e4 | A00 Explore | Polish Opening-King's Indian Variation-Schiffler Attack |
| 1 b4 Nf6 2 Bb2 g6 3 g4 | A00 Explore | Polish Opening-King's Indian Variation-Spike Variation |
| 1 b4 Nf6 2 Nf3 | A05 Explore | Polish Opening-Zukertort System |
| 1 b4 Nh6 | A00 Explore | Polish Opening-Tübingen/Karniewski Variation |
| 1 c3 | A00 Explore | Saragossa Opening |
| 1 c3 e5 2 a3 d5 3 b3 Nf6 4 Bb2 Nc6 5 a4 Bd6 6 g3 0-0 7 e3 | A00 Explore | Saragossa Opening-Cabbage Attack |
| 1 c3 e5 2 e4 Nc6 3 f4 | A00 Explore | Saragossa Opening-Bendig Gambit |
| 1 c3 Nf6 2 Qa4 e6 3 f3 Bc5 4 Qh4 Be7 5 Kd1 Nc6 6 Qe1 b6 7 e4 Bb7 8 d4 0-0 9 Bd3 a6 | A00 Explore | Saragossa Opening-Chicken Pizza Opening |
| 1 c4 | A10 Explore | English Opening |
| 1 c4 b5 | A10 Explore | English Opening-Jaenisch/Halibut Gambit |
| 1 c4 b6 2 d4 e6 | A10 Explore | English Opening-English Defence |
| 1 c4 c5 | A30 Explore | English Opening-Symmetrical Variation |
| 1 c4 c5 2 b4 | A30 Explore | English Opening-Symmetrical Variation-Wing Gambit |
| 1 c4 c5 2 Nc3 | A34 Explore | English Opening-Symmetrical Variation-Normal/Asymmetrical Variation |
| 1 c4 c5 2 Nc3 Nc6 | A35 Explore | English Opening-Symmetrical Variation-Normal Variation-2 Knights Variation |
| 1 c4 c5 2 Nc3 Nc6 3 g3 | A36 Explore | English Opening-Normal Variation-2 Knights Variation-Fianchetto Variation |
| 1 c4 c5 2 Nc3 Nc6 3 g3 g6 4 Bg2 Bg7 | A36 Explore | English Opening-2 Knights Variation-Fianchetto Variation-Ultra-Symmetrical Variation |
| 1 c4 c5 2 Nc3 Nc6 3 g3 g6 4 Bg2 Bg7 5 e3 e5 | A36 Explore | English Opening-Fianchetto Variation-Ultra-Symmetrical Variation-Botvinnik System Reversed |
| 1 c4 c5 2 Nc3 Nc6 3 g3 g6 4 Bg2 Bg7 5 e4 | A36 Explore | English Opening-Fianchetto Variation-Ultra-Symmetrical Variation-Botvinnik System |
| 1 c4 c5 2 Nc3 Nc6 3 g3 g6 4 Bg2 Bg7 5 Nf3 | A37 Explore | English Opening-2 Knights Variation-Fianchetto Variation-Ultra-Symmetrical/2 Knights Line |
| 1 c4 c5 2 Nc3 Nc6 3 g3 g6 4 Bg2 Bg7 5 Nf3 e5 | A37 Explore | English Opening-Fianchetto Variation-Ultra-Symmetrical Line-Botvinnik System Reversed/Russian Variation |
| 1 c4 c5 2 Nc3 Nc6 3 g3 g6 4 Bg2 Bg7 5 Nf3 Nf6 | A38 Explore | English Opening-Fianchetto Variation-Ultra-Symmetrical Line-Full Symmetry Line |
| 1 c4 c5 2 Nc3 Nc6 3 g3 g6 4 Bg2 Bg7 5 Nf3 Nf6 6 0-0 0-0 7 b3 | A38 Explore | English Opening-Ultra-Symmetrical Line-Full Symmetry Line-Double Fianchetto Line |
| 1 c4 c5 2 Nc3 Nc6 3 g3 g6 4 Bg2 Bg7 5 Nf3 Nf6 6 0-0 0-0 7 d3 | A38 Explore | English Opening-Ultra-Symmetrical Line-Full Symmetry Line-Duchamp Line |
| 1 c4 c5 2 Nc3 Nc6 3 g3 g6 4 Bg2 Bg7 5 Nf3 Nf6 6 0-0 0-0 7 d4 | A39 Explore | English Opening-Ultra-Symmetrical Line-Full Symmetry Line-Mecking Line |
| 1 c4 c5 2 Nc3 Nc6 3 Nf3 Nf6 | A35 Explore | English Opening-Symmetrical Variation-Normal Variation-4 Knights System |
| 1 c4 c5 2 Nc3 Nf6 3 g3 | A34 Explore | English Opening-Symmetrical Variation-Normal Variation-Fianchetto Variation |
| 1 c4 c5 2 Nc3 Nf6 3 g3 d5 4 cxd5 Nxd5 (5 Bg2 Nc7) | A34 Explore | English Opening-Normal Variation-Fianchetto Variation-Rubinstein System |
| 1 c4 c5 2 Nc3 Nf6 3 Nf3 d5 4 cxd5 Nxd5 | A34 Explore | English Opening-Symmetrical Variation-Normal Variation-3 Knights System |
| 1 c4 c5 2 Nc3 Nf6 3 Nf3 d5 4 cxd5 Nxd5 5 g3 Nc6 6 Bg2 e6 7 0-0 Be7 | A34 Explore | English Opening-Normal Variation-3 Knights System-Keres Variation |
| 1 c4 c5 2 Nf3 Nf6 3 b4 | A30 Explore | English Opening-Symmetrical Variation-Napolitano Gambit |
| 1 c4 c5 2 Nf3 Nf6 3 d4 | A31 Explore | English Opening-Symmetrical Variation-Anti-Benoni Formation |
| 1 c4 c5 2 Nf3 Nf6 3 d4 cxd4 4 Nxd4 e6 | A32 Explore | English Opening-Symmetrical Variation-Anti-Benoni Formation-Spielmann Defence |
| 1 c4 c5 2 Nf3 Nf6 3 d4 cxd4 4 Nxd4 e6 5 Nc3 Nc6 | A33 Explore | English Opening-Symmetrical Variation-Anti-Benoni Formation-Spielmann Defence (Geller Variation) |
| 1 c4 c5 2 Nf3 Nf6 3 d4 cxd4 4 Nxd4 e6 5 Nc3 Nc6 6 g3 Qb6 | A33 Explore | English Opening-Anti-Benoni Formation-Spielmann Defence-Geller Variation |
| 1 c4 c5 2 Nf3 Nf6 3 g3 b6 4 Bg2 Bb7 5 0-0 e6 6 Nc3 Be7 | A30 Explore | English Opening-Symmetrical Variation-Hedgehog System |
| 1 c4 c5 2 Nf3 Nf6 3 g3 b6 4 Bg2 Bb7 5 0-0 e6 6 Nc3 Be7 7 d4 cxd4 8 Qxd4 d6 9 Rd1 a6 10 b3 Nbd7 | A30 Explore | English Opening-Symmetrical Variation-Hedgehog System-Flexible Formation |
| 1 c4 c6 | A11 Explore | English Opening-Caro/Anglo-Slav/Caro-Kann Defensive System |
| 1 c4 c6 2 Nf3 d5 3 b3 | A12 Explore | English Opening-Caro-Kann Defensive System (Bogolubov Variation) |
| 1 c4 c6 2 Nf3 d5 3 b3 Bg4 | A12 Explore | English Opening-Caro-Kann Defensive System-Bogoljubov Variation |
| 1 c4 c6 2 Nf3 d5 3 b3 Nf6 4 Bb2 Bf5 | A12 Explore | English Opening-Caro-Kann Defensive System-New York Defensive System |
| 1 c4 c6 2 Nf3 d5 3 b3 Nf6 4 Bb2 Bg4 | A12 Explore | English Opening-Caro-Kann Defensive System-Capablanca's Variation |
| 1 c4 c6 2 Nf3 d5 3 b3 Nf6 4 Bb2 g6 | A12 Explore | English Opening-Caro-Kann Defensive System-Bled Variation |
| 1 c4 c6 2 Nf3 d5 3 b3 Nf6 4 g3 Bf5 | A12 Explore | English Opening-Caro-Kann Defensive System-London Defensive System |
| 1 c4 c6 2 Nf3 d5 3 b3 Nf6 4 g3 Bf5 5 Bg2 e6 6 Bb2 Nbd7 | A12 Explore | English Opening-Caro-Kann Defensive System-London Defensive System-Réti Variation |
| 1 c4 c6 2 Nf3 d5 3 b3 Nf6 4 g3 Bg4 | A12 Explore | English Opening-Caro-Kann Defensive System-Torre Defensive System |
| 1 c4 c6 2 Nf3 d5 3 b3 Nf6 4 g3 g6 | A12 Explore | English Opening-Caro-Kann Defensive System-Bled Variation |
| 1 c4 c6 2 Nf3 d5 3 g3 Nf6 4 Bg2 g6 | A11 Explore | English Opening-Caro-Kann Defensive System-Irregular Variation |
| 1 c4 d5 | A10 Explore | English Opening-Anglo-Scandinavian Defence |
| 1 c4 d5 2 cxd5 c6 | A10 Explore | English Opening-Anglo-Scandinavian Defence-Vector Gambit |
| 1 c4 d5 2 cxd5 e6 | A10 Explore | English Opening-Anglo-Scandinavian Defence-Löhn Gambit |
| 1 c4 d5 2 cxd5 Nf6 | A10 Explore | English Opening-Anglo-Scandinavian Defence-Schultz Gambit |
| 1 c4 d5 2 cxd5 Qxd5 3 Nc3 Qa5 | A10 Explore | English Opening-Anglo-Scandinavian Defence-Malvinas Variation |
| 1 c4 e5 | A20 Explore | English Opening-Bremen/King's English Variation |
| 1 c4 e5 2 e3 Nf6 3 f4 exf4 4 Nf3 | A20 Explore | English Opening-Bremen Variation-Kahiko-Hula Gambit |
| 1 c4 e5 2 f4 | A20 Explore | English Opening-Bremen Variation-Double Whammy Variation |
| 1 c4 e5 2 f4 exf4 3 Nf3 g5 4 g3 | A20 Explore | English Opening-Bremen Variation-Double Whammy Variation-Vampire Gambit |
| 1 c4 e5 2 g3 h5 | A20 Explore | English Opening-Bremen Variation-Drill Variation |
| 1 c4 e5 2 Nc3 | A21 Explore | English Opening-Bremen Variation-Reversed Sicilian |
| 1 c4 e5 2 Nc3 Bb4 | A21 Explore | English Opening-Bremen Variation-Reversed Sicilian-Kramnik-Shirov/Vienna Counterattack |
| 1 c4 e5 2 Nc3 d6 3 g3 Be6 4 Bg2 Nc6 | A21 Explore | English Opening-Bremen Variation-Reverced Sicilian-Troeger Defence |
| 1 c4 e5 2 Nc3 d6 3 g3 c6 | A21 Explore | English Opening-Bremen Variation-Reversed Sicilian-Keres Defence |
| 1 c4 e5 2 Nc3 d6 3 Nf3 | A21 Explore | English Opening-Bremen Variation-Reversed Sicilian-General Variation |
| 1 c4 e5 2 Nc3 d6 3 Nf3 Bg4 | A21 Explore | English Opening-Reversed Sicilian-General Variation-Smyslov Defence |
| 1 c4 e5 2 Nc3 Nc6 | A25 Explore | English Opening-Bremen Variation-Reversed Closed Sicilian |
| 1 c4 e5 2 Nc3 Nc6 3 e3 Nf6 4 b3 d6 | A25 Explore | English Opening-Bremen Variation-Reversed Closed Sicilian-Amsterdam Variation |
| 1 c4 e5 2 Nc3 Nc6 3 f4 | A25 Explore | English Opening-Bremen Variation-Reversed Closed Sicilian-Mazedonisch Variation |
| 1 c4 e5 2 Nc3 Nc6 3 g3 | A25 Explore | English Opening-Bremen Variation-Reversed Closed Sicilian-Carls Variation |
| 1 c4 e5 2 Nc3 Nc6 3 g3 g6 4 Bg2 Be7 | A25 Explore | English Opening-Reversed Closed Sicilian-Carls Variation-Tröger Variation |
| 1 c4 e5 2 Nc3 Nc6 3 g3 g6 4 Bg2 Bg7 | A25 Explore | English Opening-Reversed Closed Sicilian-Carls Variation-Taimanov Variation |
| 1 c4 e5 2 Nc3 Nc6 3 g3 g6 4 Bg2 Bg7 5 d3 | A26 Explore | English Opening-Carls Variation-Taimanov Variation-Closed System |
| 1 c4 e5 2 Nc3 Nc6 3 g3 g6 4 Bg2 Bg7 5 d3 d6 | A26 Explore | English Opening-Taimanov Variation-Closed System-Full Symmetry |
| 1 c4 e5 2 Nc3 Nc6 3 g3 g6 4 Bg2 Bg7 5 d3 d6 6 e4 | A26 Explore | English Opening-Closed System-Full Symmetry-Botvinnik System |
| 1 c4 e5 2 Nc3 Nc6 3 g3 g6 4 Bg2 Bg7 5 e3 d6 6 Nge2 Be6 | A25 Explore | English Opening-Carls Variation-Taimanov Variation-Bremen-Hort Variation |
| 1 c4 e5 2 Nc3 Nc6 3 g3 g6 4 Bg2 Bg7 5 e3 d6 6 Nge2 Nh6 | A25 Explore | English Opening-Reversed Closed Sicilian-Carls Variation-Taimanov Variation |
| 1 c4 e5 2 Nc3 Nc6 3 g3 g6 4 Bg2 Bg7 5 Rb1 | A25 Explore | English Opening-Carls Variation-Taimanov Variation-Hungarian Attack |
| 1 c4 e5 2 Nc3 Nc6 3 g3 g6 4 Bg2 Bg7 5 Rb1 Nh6 | A25 Explore | English Opening-Carls Variation-Hungarian Attack-Taimanov Variation |
| 1 c4 e5 2 Nc3 Nc6 3 Nf3 | A27 Explore | English Opening-Bremen Variation-Reversed Closed Sicilian-3 Knights System |
| 1 c4 e5 2 Nc3 Nc6 3 Nf3 f5 | A27 Explore | English Opening-Reversed Closed Sicilian-3 Knights System-Dutch Variation |
| 1 c4 e5 2 Nc3 Nc6 3 Nf3 Nf6 | A28 Explore | English Opening-Bremen Variation-Reversed Closed Sicilian-4 Knights System #2 |
| 1 c4 e5 2 Nc3 Nc6 3 Nf3 Nf6 4 a3 | A28 Explore | English Opening-Reversed Closed Sicilian-4 Knights System #2-Marini/Korchnoi Line |
| 1 c4 e5 2 Nc3 Nc6 3 Nf3 Nf6 4 d3 | A28 Explore | English Opening-Reversed Closed Sicilian-4 Knights System #2-Capablanca/Flexible Line |
| 1 c4 e5 2 Nc3 Nc6 3 Nf3 Nf6 4 d4 e4 | A28 Explore | English Opening-Reversed Closed Sicilian-4 Knights System #2-Bradley Beach Variation |
| 1 c4 e5 2 Nc3 Nc6 3 Nf3 Nf6 4 d4 exd4 5 Nxd4 Bb4 6 Bg5 h6 (7 Bh4 Bxc3+ 8 bxc3 Ne5) | A28 Explore | English Opening-Reversed Closed Sicilian-4 Knights System #2-Nenarokov Variation |
| 1 c4 e5 2 Nc3 Nc6 3 Nf3 Nf6 4 e3 | A28 Explore | English Opening-Reversed Closed Sicilian-4 Knights System #2-Quiet Line #3 |
| 1 c4 e5 2 Nc3 Nc6 3 Nf3 Nf6 4 e3 Bb4 5 Qc2 0-0 6 Nd5 Re8 7 Qf5 | A28 Explore | English Opening-4 Knights System #2-Quiet Line #3-Stean Variation |
| 1 c4 e5 2 Nc3 Nc6 3 Nf3 Nf6 4 e3 Bb4 5 Qc2 Bxc3 | A28 Explore | English Opening-4 Knights System #2-Quiet Line #3-Romanishin Variation |
| 1 c4 e5 2 Nc3 Nc6 3 Nf3 Nf6 4 e4 | A28 Explore | English Opening-Reversed Closed Sicilian-4 Knights System #2-Nimzowitsch/Botvinnik Line |
| 1 c4 e5 2 Nc3 Nc6 3 Nf3 Nf6 4 g3 | A29 Explore | English Opening-Bremen Variation-Reversed Closed Sicilian-Kingside Fianchetto Line |
| 1 c4 e5 2 Nc3 Nf6 | A22 Explore | English Opening-Bremen Variation-Reversed Sicilian-2 Knights Variation |
| 1 c4 e5 2 Nc3 Nf6 3 f4 | A22 Explore | English Opening-Reversed Sicilian-2 Knights Variation-Mazedonisch Variation |
| 1 c4 e5 2 Nc3 Nf6 3 g3 | A22 Explore | English Opening-Bremen Variation-2 Knights Variation-Carls-Bremen System/Fianchetto Line |
| 1 c4 e5 2 Nc3 Nf6 3 g3 Bb4 | A22 Explore | English Opening-2 Knights Variation-Carls-Bremen System-Smyslov System |
| 1 c4 e5 2 Nc3 Nf6 3 g3 c6 | A23 Explore | English Opening-Reversed Sicilian-Carls-Bremen System-Keres Variation |
| 1 c4 e5 2 Nc3 Nf6 3 g3 d5 | A22 Explore | English Opening-Reversed Sicilian-Carls-Bremen System-Reversed Dragon |
| 1 c4 e5 2 Nc3 Nf6 3 g3 g6 | A24 Explore | English Opening-2 Knights Variation-Carls-Bremen System-Fianchetto Line |
| 1 c4 e5 2 Nc3 Nf6 3 g3 g6 4 Bg2 Bg7 5 d3 | A24 Explore | English Opening-Carls-Bremen System-Fianchetto Line-Closed Variation |
| 1 c4 e5 2 Nc3 Nf6 3 g3 g6 4 Bg2 Bg7 5 d3 d6 6 e4 0-0 7 Nge2 c6 8 0-0 a6 | A26 Explore | English Opening-Carls-Bremen System-Closed Variation-Prickly Pawn Pass System |
| 1 c4 e5 2 Nc3 Nf6 3 g3 g6 4 Bg2 Bg7 5 e3 d6 6 Nge2 Be6 | A24 Explore | English Opening-Carls-Bremen System-Fianchetto Line-Hort Variation |
| 1 c4 e5 2 Nc3 Nf6 3 Nf3 e4 4 Ng5 b5 | A22 Explore | English Opening-Bremen Variation-2 Knights Variation-Bellón Gambit |
| 1 c4 e5 2 Nc3 Nf6 3 Nf3 e4 4 Ng5 Ng4 | A22 Explore | English Opening-Bremen Variation-2 Knights Variation-Erbenheimer Gambit |
| 1 c4 e5 2 Nf3 | A20 Explore | English Opening-Bremen Variation-Nimzowitsch Variation |
| 1 c4 e5 2 Nf3 e4 | A20 Explore | English Opening-Bremen Variation-Nimzowitsch Variation-Flohr Variation |
| 1 c4 e5 2 Qa4 | A20 Explore | English Opening-Bremen Variation-English Queen Variation |
| 1 c4 e6 | A13 Explore | English Opening-Agincourt Defence |
| 1 c4 e6 2 d4 b6 | A13 Explore | English Opening-Agincourt Defence-English Defence |
| 1 c4 e6 2 d4 b6 3 e4 Bb7 4 Bd3 Nc6 | A13 Explore | English Opening-Agincourt Defence-English Defence-Perrin Variation |
| 1 c4 e6 2 d4 b6 3 e4 Bb7 4 f3 f5 5 exf5 Nh6 | A13 Explore | English Opening-Agincourt Defence-English Defence-Poli Gambit |
| 1 c4 e6 2 d4 b6 3 Nc3 Bb7 4 e4 f5 5 d5 | A13 Explore | English Opening-Agincourt Defence-English Defence-Hartlaub Gambit Declined |
| 1 c4 e6 2 d4 b6 3 Nc3 Bb7 4 e4 f5 5 exf5 Nf6 | A13 Explore | English Opening-Agincourt Defence-English Defence-Hartlaub Gambit Accepted |
| 1 c4 e6 2 d4 e5 | A40 Explore | English Opening-Agincourt Defence-Horwitz Defence-Zilbermints Gambit |
| 1 c4 e6 2 Nf3 d5 | A13 Explore | English Opening-Agincourt Defence-King's Knight Variation |
| 1 c4 e6 2 Nf3 d5 3 b3 Nf6 4 Bb2 c5 5 e3 | A13 Explore | English Opening-Agincourt Defence-King's Knight Variation-Whimpey System |
| 1 c4 e6 2 Nf3 d5 3 g3 | A13 Explore | English Opening-Agincourt Defence-King's Knight Variation-Agincourt Variation |
| 1 c4 e6 2 Nf3 d5 3 g3 b6 4 Bg2 Bb7 5 0-0 | A14 Explore | English Opening-Agincourt Defence-Agincourt Variation-Catalan Defence |
| 1 c4 e6 2 Nf3 d5 3 g3 c5 | A13 Explore | English Opening-King's Knight Variation-Agincourt Variation-Catalan Defence |
| 1 c4 e6 2 Nf3 d5 3 g3 c6 | A13 Explore | English Opening-Agincourt Defence-Agincourt Variation-Kurajica Defence |
| 1 c4 e6 2 Nf3 d5 3 g3 Nf6 | A13 Explore | English Opening-Agincourt Defence-Agincourt Variation-Neo-Catalan |
| 1 c4 e6 2 Nf3 d5 3 g3 Nf6 4 Bg2 Bd6 | A13 Explore | English Opening-Agincourt Variation-Neo-Catalan-Bogoljubov/Bogo-Catalan Defence |
| 1 c4 e6 2 Nf3 d5 3 g3 Nf6 4 Bg2 Be7 | A13 Explore | English Opening-Agincourt Defence-Agincourt Variation-Neo-Catalan Declined |
| 1 c4 e6 2 Nf3 d5 3 g3 Nf6 4 Bg2 Be7 5 0-0 | A14 Explore | English Opening-Agincourt Defence-Agincourt Variation-Neo-Catalan Declined |
| 1 c4 e6 2 Nf3 d5 3 g3 Nf6 4 Bg2 Be7 5 0-0 c5 6 cxd5 Nxd5 7 Nc3 Nc6 | A14 Explore | English Opening-Agincourt Variation-Neo-Catalan Declined-Keres Defence |
| 1 c4 e6 2 Nf3 d5 3 g3 Nf6 4 Bg2 Be7 5 b3 0-0 6 Bb2 a5 | A14 Explore | English Opening-Agincourt Variation-Neo-Catalan-Bogolubov Variation |
| 1 c4 e6 2 Nf3 d5 3 g3 Nf6 4 Bg2 c5 5 b3 Nc6 6 0-0 Be7 | A13 Explore | English Opening-Agincourt Defence-Agincourt Variation-Tarrasch Defence |
| 1 c4 e6 2 Nf3 d5 3 g3 Nf6 4 Bg2 c6 | A13 Explore | English Opening-Agincourt Variation-Neo-Catalan-Semi-Slav Defence |
| 1 c4 e6 2 Nf3 d5 3 g3 Nf6 4 Bg2 dxc4 | A13 Explore | English Opening-Agincourt Defence-Agincourt Variation-Neo-Catalan Accepted |
| 1 c4 e6 2 Nf3 Nf6 3 g3 a6 (4 Bg2 b5) | A13 Explore | English Opening-Agincourt Defence-Romanishin Gambit |
| 1 c4 f5 | A10 Explore | English Opening-Anglo-Dutch Defence |
| 1 c4 f5 2 b4 | A10 Explore | English Opening-Anglo-Dutch Defence-Polish Variation |
| 1 c4 f5 2 e4 | A10 Explore | English Opening-Anglo-Dutch Defence-Hickmann Gambit |
| 1 c4 f5 2 e4 fxe4 3 Nc3 Nf6 4 g4 | A10 Explore | English Opening-Anglo-Dutch Defence-Hickmann Gambit-Porcupine Variation |
| 1 c4 f5 2 g4 | A10 Explore | English Opening-Anglo-Dutch Defence-Wade Gambit |
| 1 c4 f5 2 Nc3 Nf6 3 e4 | A10 Explore | English Opening-Anglo-Dutch Defence-Ferenc Gambit |
| 1 c4 f5 2 Nf3 d6 3 e4 | A10 Explore | English Opening-Anglo-Dutch Defence-Chabanon Gambit |
| 1 c4 g5 2 d4 Bg7 | A10 Explore | English Opening-Myers Variation |
| 1 c4 g5 2 d4 e5 | A10 Explore | English Opening-Zilbermints Gambit |
| 1 c4 g6 | A10 Explore | English Opening-Great Snake Variation |
| 1 c4 g6 2 e4 e5 | A10 Explore | English Opening-Great Snake Variation-Adorjan Defence |
| 1 c4 Nc6 | A10 Explore | English Opening-Anglo-Lithuanian Variation |
| 1 c4 Nf6 | A15 Explore | English Opening-Anglo-Indian Defence |
| 1 c4 Nf6 2 b4 | A15 Explore | English Opening-Anglo-Indian Defence-Orangutan/Polish Variation |
| 1 c4 Nf6 2 e4 | A15 Explore | English Opening-Anglo-Indian Defence-Achilles-Omega Gambit |
| 1 c4 Nf6 2 g4 | A15 Explore | English Opening-Anglo-Indian Defence-Unnamed Gambit |
| 1 c4 Nf6 2 Nc3 | A16 Explore | English Opening-Anglo-Indian Defence-Queen's Knight Variation |
| 1 c4 Nf6 2 Nc3 d5 | A16 Explore | English Opening-Anglo-Indian Defence-Queen's Knight Variation-Anglo-Grünfeld/Golombek Defence |
| 1 c4 Nf6 2 Nc3 d5 3 cxd5 Nxd5 4 g3 c5 5 Bg2 Nc7 | A16 Explore | English Opening-Queen's Knight Variation-Anglo-Grünfeld Defence-Rubinstein Variation |
| 1 c4 Nf6 2 Nc3 d5 3 cxd5 Nxd5 4 g3 g6 5 Bg2 Nb6 | A16 Explore | English Opening-Anglo-Indian Defence-Anglo-Grünfeld Defence-Czech Defence |
| 1 c4 Nf6 2 Nc3 d5 3 cxd5 Nxd5 4 g3 g6 5 Bg2 Nxc3 | A16 Explore | English Opening-Anglo-Indian Defence-Anglo-Grünfeld Defence-Smyslov Defence |
| 1 c4 Nf6 2 Nc3 d5 3 cxd5 Nxd5 4 Nf3 g6 5 g3 Bg7 6 Bg2 e5 | A16 Explore | English Opening-Anglo-Indian Defence-Anglo-Grünfeld Defence-Korchnoi Variation |
| 1 c4 Nf6 2 Nc3 e6 | A17 Explore | English Opening-Anglo-Indian Defence-Queen's Knight Variation-Hedgehog System |
| 1 c4 Nf6 2 Nc3 e6 3 e4 | A18 Explore | English Opening-Anglo-Indian Defence-Queen's Knight Variation-Flohr-Mikenas-Carls Variation #2 |
| 1 c4 Nf6 2 Nc3 e6 3 e4 c5 | A19 Explore | English Opening-Anglo-Indian Defence-Flohr-Mikenas-Carls Variation #2-Sicilian Variation |
| 1 c4 Nf6 2 Nc3 e6 3 e4 c5 4 e5 Ng8 | A19 Explore | English Opening-Flohr-Mikenas-Carls Variation #2-Sicilian Variation-Nei Gambit |
| 1 c4 Nf6 2 Nc3 e6 3 e4 d5 | A18 Explore | English Opening-Queen's Knight Variation-Flohr-Mikenas-Carls Variation #2-French Variation |
| 1 c4 Nf6 2 Nc3 e6 3 e4 d5 4 e5 | A18 Explore | English Opening-Flohr-Mikenas-Carls Variation #2-French Variation-Flohr Variation |
| 1 c4 Nf6 2 Nc3 e6 3 e4 e5 | A19 Explore | English Opening-Anglo-Indian Defence-Flohr-Mikenas-Carls Variation #2-Sicilian Variation |
| 1 c4 Nf6 2 Nc3 e6 3 e4 Nc6 | A18 Explore | English Opening-Queen's Knight Variation-Flohr-Mikenas-Carls Variation #2-Kevitz Defence |
| 1 c4 Nf6 2 Nc3 e6 3 Nf3 b6 | A17 Explore | English Opening-Anglo-Indian Defence-Hedgehog System-Queen's Indian Formation |
| 1 c4 Nf6 2 Nc3 e6 3 Nf3 b6 4 e4 Bb7 5 Bd3 | A17 Explore | English Opening-Hedgehog System-Queen's Indian Formation-Romanishin Variation |
| 1 c4 Nf6 2 Nc3 e6 3 Nf3 Bb4 | A17 Explore | English Opening-Anglo-Indian Defence-Hedgehog System-Nimzo-English/Nimzovich Opening |
| 1 c4 Nf6 2 Nc3 e6 3 Nf3 Bb4 4 g4 | A18 Explore | English Opening-Hedgehog System-Nimzo-English Opening-Zviagintsev-Krasenkov Attack |
| 1 c4 Nf6 2 Nc3 g6 3 Nf3 Bg7 4 e4 | A17 Explore | English Opening-Anglo-Indian Defence-Queen's Knight Variation-Anti-Anti-Grünfeld Variation |
| 1 c4 Nf6 2 Nf3 | A15 Explore | English Opening-Anglo-Indian Defence-King's Knight Variation |
| 1 c4 Nf6 2 Nf3 b6 | A15 Explore | English Opening-Anglo-Indian Defence-King's Knight Variation-Queen's Indian Formation |
| 1 c4 Nf6 2 Nf3 d5 | A15 Explore | English Opening-Anglo-Indian Defence-King's Knight Variation-Scandinavian Defence |
| 1 c4 Nf6 2 Nf3 d5 3 cxd5 Nxd5 | A15 Explore | English Opening-King's Knight Variation-Scandinavian Defence-Exchange Variation |
| 1 c4 Nf6 2 Nf3 d6 | A15 Explore | English Opening-Anglo-Indian Defence-King's Knight Variation-Old Indian Formation |
| 1 c4 Nf6 2 Nf3 e6 3 g3 a6 | A15 Explore | English Opening-Anglo-Indian Defence-King's Knight Variation-Romanishin Variation |
| 1 c4 Nf6 2 Nf3 e6 3 g3 a6 4 Bg2 b5 | A13 Explore | English Opening-Anglo-Indian Defence-King's Knight Variation-Romanishin Gambit |
| 1 c4 Nf6 2 Nf3 e6 3 g3 b6 4 Bg2 Bb7 | A13 Explore | English Opening-Anglo-Indian Defence-King's Knight Variation-Queen's Indian Formation |
| 1 c4 Nf6 2 Nf3 g6 | A15 Explore | English Opening-Anglo-Indian Defence-King's Knight Variation-King's Indian Formation |
| 1 c4 Nf6 2 Nf3 g6 3 g3 b6 4 Bg2 Bb7 | A15 Explore | English Opening-King's Knight Variation-King's Indian Formation-Double Fianchetto Variation |
| 1 c4 Nf6 2 Nf3 g6 3 g3 Bg7 4 Bg2 0-0 | A15 Explore | English Opening-King's Knight Variation-King's Indian Formation-King's Fianchetto Variation |
| 1 c4 Nf6 2 Nf3 g6 3 g3 c6 | A15 Explore | English Opening-King's Knight Variation-King's Indian Formation-Slav Formation |
| 1 c4 Nf6 2 Nf3 g6 3 g3 d5 | A15 Explore | English Opening-King's Knight Variation-King's Indian Formation-Gruenfeld Formation |
| 1 d3 | A00 Explore | Mieses Opening |
| 1 d3 c5 2 Nc3 Nc6 3 g3 | A00 Explore | Mieses Opening-Venezolana Opening |
| 1 d3 d5 2 Nc3 Nc6 3 g3 | A00 Explore | Mieses Opening-Venezolana Variation |
| 1 d3 e5 | A00 Explore | Mieses Opening-Reversed Rat Variation |
| 1 d3 e5 2 Bd2 | A00 Explore | Mieses Opening-Reversed Rat Variation-Valencia Opening |
| 1 d3 e5 2 Nd2 | A00 Explore | Mieses Opening-Reversed Rat Variation-Valencia Opening |
| 1 d3 g6 2 g4 | A00 Explore | Mieses Opening-Myers Spike Attack |
| 1 d4 | A40 Explore | Queen's Pawn |
| 1 d4 a6 2 c4 b5 3 e4 e6 4 cxb5 axb5 | A40 Explore | Queen's Pawn-St. George Defence-St. Georgs Gambit |
| 1 d4 b5 | A40 Explore | Queen's Pawn-Polish Defence |
| 1 d4 b5 2 e4 Bb7 3 Bxb5 | A40 Explore | Queen's Pawn-Polish Defence-Spassky Gambit Accepted |
| 1 d4 b6 | A40 Explore | Queen's Pawn-English #2/Queen Fianchetto/Owen Defence |
| 1 d4 b6 2 c4 Bb7 3 Nc3 e5 | A40 Explore | Queen's Pawn-English Defence #2-Eastbourne Gambit |
| 1 d4 b6 2 c4 c5 3 d5 e6 4 e4 b5 5 cxb5 f5 | A50 Explore | Queen's Pawn-English Defence #2-Blumenfeld-Hiva Gambit |
| 1 d4 c5 | A43 Explore | Queen's Pawn-Old Benoni Defence |
| 1 d4 c5 2 b4 | A43 Explore | Queen's Pawn-Old Benoni Defence-Zilbermints-Benoni/Nakamura Gambit |
| 1 d4 c5 2 c4 cxd4 3 e3 | A43 Explore | Queen's Pawn-Old Benoni Defence-Liedmann Gambit |
| 1 d4 c5 2 c4 e6 | A43 Explore | Queen's Pawn-Old Benoni Defence-Franco-Benoni Variation |
| 1 d4 c5 2 d5 d6 3 Nc3 g6 | A43 Explore | Queen's Pawn-Old Benoni Defence-Schmid's System |
| 1 d4 c5 2 d5 e5 | A44 Explore | Queen's Pawn-Old Benoni Defence-Pawn Thrust Variation |
| 1 d4 c5 2 d5 e5 3 e4 d6 | A44 Explore | Queen's Pawn-Old Benoni Defence-Pawn Thrust Variation-Semi-Benoni/Blockade/Russian Variation |
| 1 d4 c5 2 d5 e6 3 e4 | A43 Explore | Queen's Pawn-Franco-Benoni/Franco-Sicilian Defence |
| 1 d4 c5 2 d5 f5 | A43 Explore | Queen's Pawn-Old Benoni Defence-Mujannah/Clarendon Court Formation |
| 1 d4 c5 2 d5 f5 3 e4 | A43 Explore | Queen's Pawn-Old Benoni Defence-Mujannah Formation-Benoni-Staunton Gambit |
| 1 d4 c5 2 d5 Na6 | A43 Explore | Queen's Pawn-Old Benoni Defence-Jaffe's Folly/Snail Variation |
| 1 d4 c5 2 d5 Nf6 | A43 Explore | Queen's Pawn-Old Benoni Defence-Benoni-Indian Defence |
| 1 d4 c5 2 d5 Nf6 3 c4 Ne4 | A56 Explore | Queen's Pawn-Old Benoni Defence-Benoni-Indian Defence-The Vulture Defence |
| 1 d4 c5 2 d5 Nf6 3 Nc3 Qa5 | A43 Explore | Queen's Pawn-Old Benoni Defence-Benoni-Indian Defence-Woozle Defence |
| 1 d4 c5 2 d5 Nf6 3 Nf3 | A43 Explore | Queen's Pawn-Old Benoni Defence-Benoni-Indian Defence-Kingside Move Order |
| 1 d4 c5 2 d5 Nf6 3 Nf3 c4 | A43 Explore | Old Benoni Defence-Benoni-Indian Defence-Kingside Move Order-Hawk/Habichd Defence |
| 1 d4 c5 2 dxc5 | A43 Explore | Queen's Pawn-Old Benoni Defence-Benoni Gambit Accepted |
| 1 d4 c5 2 dxc5 b6 | A43 Explore | Queen's Pawn-Old Benoni Defence-Benoni Gambit Accepted-Cormorant Gambit |
| 1 d4 c5 2 dxc5 Na6 | A43 Explore | Queen's Pawn-Old Benoni Defence-Benoni Gambit Accepted-Schlenker Defence |
| 1 d4 c5 2 Nf3 cxd4 3 b4 | A56 Explore | Queen's Pawn-Old Benoni Defence-Zilbermints-Benoni Gambit |
| 1 d4 c5 2 Nf3 cxd4 3 b4 e5 | A56 Explore | Queen's Pawn-Old Benoni Defence-Zilbermints-Benoni Gambit-Tamarkin Countergambit |
| 1 d4 c6 2 c4 d6 | A41 Explore | Queen's Pawn-Anglo-Slav Opening |
| 1 d4 d5 | D00 Explore | Queen's Pawn |
| 1 d4 d5 2 Bf4 | D00 Explore | Queen's Pawn-Sarratt/Mason Attack |
| 1 d4 d5 2 Bf4 c5 | D00 Explore | Queen's Pawn-Sarratt Attack-Steinitz Countergambit |
| 1 d4 d5 2 Bf4 c5 3 e4 | D00 Explore | Queen's Pawn-Sarratt Attack-Steinitz Countergambit-Morris Countergambit |
| 1 d4 d5 2 Bg5 | D00 Explore | Queen's Pawn-Levitsky Attack |
| 1 d4 d5 2 Bg5 Bg4 | D00 Explore | Queen's Pawn-Levitsky Attack-Welling Variation |
| 1 d4 d5 2 Bg5 h6 3 Bh4 c6 4 Nf3 Qb6 | D00 Explore | Queen's Pawn-Levitsky Attack-Euwe Variation-Modern Line |
| 1 d4 d5 2 c4 | D06 Explore | Queen's Pawn-Queen's Gambit |
| 1 d4 d5 2 c4 b5 | D06 Explore | Queen's Pawn-Queen's Gambit Declined-Zilbermints Gambit |
| 1 d4 d5 2 c4 Bf5 | D06 Explore | Queen's Pawn-Queen's Gambit Declined-Keres/Grau/Sahovic/Baltic Defence |
| 1 d4 d5 2 c4 Bf5 3 cxd5 Bxb1 4 Qa4+ c6 5 dxc6 Nxc6 | D31 Explore | Queen's Pawn-Queen's Gambit Declined-Keres Defence-Argentinian Gambit |
| 1 d4 d5 2 c4 Bf5 3 cxd5 Bxb1 4 Qa4+ c6 5 dxc6 Nxc6 6 Rxb1 | D31 Explore | Queen's Gambit Declined-Keres Defence-Argentinian Gambit-Argentine Variation |
| 1 d4 d5 2 c4 Bf5 3 Nc3 e6 4 Nf3 c6 | D06 Explore | Queen's Pawn-Queen's Gambit Declined-Keres Defence-Pseudo-Slav Defence |
| 1 d4 d5 2 c4 Bf5 3 Nc3 e6 4 Nf3 Nc6 | D06 Explore | Queen's Pawn-Queen's Gambit Declined-Keres Defence-Pseudo-Chigorin Variation |
| 1 d4 d5 2 c4 Bf5 3 Nc3 e6 4 Qb3 | D06 Explore | Queen's Pawn-Queen's Gambit Declined-Keres Defence-Queen Attack Deferred |
| 1 d4 d5 2 c4 Bf5 3 Qb3 | D06 Explore | Queen's Pawn-Queen's Gambit Declined-Keres Defence-Queen Attack |
| 1 d4 d5 2 c4 c5 | D02 Explore | Queen's Pawn-Queen's Gambit Declined-Symmetrical/Austrian Defence |
| 1 d4 d5 2 c4 c5 3 cxd5 Nf6 | D02 Explore | Queen's Pawn-Queen's Gambit Declined-Austrian Defence-Gusev Countergambit |
| 1 d4 d5 2 c4 c5 3 cxd5 Nf6 4 e4 Nxe4 5 dxc5 Qa5+ | D02 Explore | Queen's Gambit Declined-Austrian Defence-Gusev Countergambit-Haberditz Variation |
| 1 d4 d5 2 c4 c5 3 dxc5 d4 | D02 Explore | Queen's Pawn-Queen's Gambit Declined-Austrian Defence-Salvio Countergambit |
| 1 d4 d5 2 c4 c6 | D10 Explore | Queen's Pawn-Queen's Gambit Declined-Slav Defence |
| 1 d4 d5 2 c4 c6 3 cxd5 | D10 Explore | Queen's Pawn-Queen's Gambit Declined-Slav Defence-Classical Exchange Variation |
| 1 d4 d5 2 c4 c6 3 e4 | B12 Explore | Queen's Pawn-Queen's Gambit Declined-Slav Defence-Diemer Gambit |
| 1 d4 d5 2 c4 c6 3 Nc3 dxc4 4 e4 | D10 Explore | Queen's Pawn-Queen's Gambit Declined-Slav Defence-Alekhine Attack |
| 1 d4 d5 2 c4 c6 3 Nc3 e5 | D10 Explore | Queen's Pawn-Queen's Gambit Declined-Slav Defence-Winawer Countergambit |
| 1 d4 d5 2 c4 c6 3 Nc3 e5 4 e4 | D10 Explore | Queen's Gambit Declined-Slav Defence-Winawer Countergambit-Anti-Winawer Gambit |
| 1 d4 d5 2 c4 c6 3 Nf3 | D11 Explore | Queen's Pawn-Queen's Gambit Declined-Slav Defence-Modern/Rubinstein Line |
| 1 d4 d5 2 c4 c6 3 Nf3 Nf6 4 Bg5 | D11 Explore | Queen's Gambit Declined-Slav Defence-Modern Line-Bonet Gambit |
| 1 d4 d5 2 c4 c6 3 Nf3 Nf6 4 cxd5 (cxd5) | D13 Explore | Queen's Gambit Declined-Slav Defence-Modern Line-Exchange Variation |
| 1 d4 d5 2 c4 c6 3 Nf3 Nf6 4 cxd5 cxd5 5 Nc3 Nc6 6 Bf4 Bf5 | D14 Explore | Queen's Gambit Declined-Modern Line-Exchange Variation-Symmetrical Line |
| 1 d4 d5 2 c4 c6 3 Nf3 Nf6 4 cxd5 cxd5 5 Nc3 Nc6 6 Bf4 Bf5 7 e3 e6 8 Qb3 Bb4 | D14 Explore | Queen's Gambit Declined-Exchange Variation-Symmetrical Line-Trifunovic Variation |
| 1 d4 d5 2 c4 c6 3 Nf3 Nf6 4 e3 | D11 Explore | Queen's Gambit Declined-Slav Defence-Modern Line-Quiet Variation |
| 1 d4 d5 2 c4 c6 3 Nf3 Nf6 4 e3 Bf5 | D12 Explore | Queen's Gambit Declined-Modern Line-Quiet Variation-Schallopp/Delmar Defence |
| 1 d4 d5 2 c4 c6 3 Nf3 Nf6 4 e3 Bf5 5 cxd5 cxd5 6 Nc3 | D12 Explore | Queen's Gambit Declined-Quiet Variation-Schallopp Defence-Exchange Variation |
| 1 d4 d5 2 c4 c6 3 Nf3 Nf6 4 e3 Bf5 5 cxd5 cxd5 6 Nc3 e6 7 Ne5 Nfd7 | D12 Explore | Queen's Gambit Declined-Schallopp Defence-Exchange Variation-Amsterdam Variation |
| 1 d4 d5 2 c4 c6 3 Nf3 Nf6 4 e3 Bf5 5 cxd5 cxd5 6 Qb3 Qc8 7 Bd2 e6 8 Na3 | D12 Explore | Queen's Gambit Declined-Quiet Variation-Schallopp Defence-Landau Variation |
| 1 d4 d5 2 c4 c6 3 Nf3 Nf6 4 e3 Bf5 5 Nbd2 e6 6 Be2 Bd6 7 c5 | D12 Explore | Queen's Gambit Declined-Quiet Variation-Delmar Defence-Breyer Variation |
| 1 d4 d5 2 c4 c6 3 Nf3 Nf6 4 e3 Bg4 | D12 Explore | Queen's Gambit Declined-Modern Line-Quiet Variation-Pin Defence |
| 1 d4 d5 2 c4 c6 3 Nf3 Nf6 4 Nbd2 | D11 Explore | Queen's Gambit Declined-Slav Defence-Modern Line-Breyer Variation |
| 1 d4 d5 2 c4 c6 3 Nf3 Nf6 4 Nc3 | D15 Explore | Queen's Gambit Declined-Slav Defence-Modern Line-3 Knights Variation |
| 1 d4 d5 2 c4 c6 3 Nf3 Nf6 4 Nc3 a6 | D15 Explore | Queen's Gambit Declined-Modern Line-3 Knights Variation-Chameleon Variation |
| 1 d4 d5 2 c4 c6 3 Nf3 Nf6 4 Nc3 a6 5 c5 | D15 Explore | Queen's Gambit Declined-3 Knights Variation-Chameleon Variation-Advance System |
| 1 d4 d5 2 c4 c6 3 Nf3 Nf6 4 Nc3 dxc4 | D15 Explore | Queen's Gambit Declined-Slav Defence Accepted-3 Knights Variation-2 Knights Attack |
| 1 d4 d5 2 c4 c6 3 Nf3 Nf6 4 Nc3 dxc4 5 a4 | D16 Explore | Queen's Gambit Declined-3 Knights Variation-2 Knights Attack-Alapin Variation |
| 1 d4 d5 2 c4 c6 3 Nf3 Nf6 4 Nc3 dxc4 5 a4 Bf5 | D17 Explore | Queen's Gambit Declined-2 Knights Attack-Alapin Variation-Czech Defence |
| 1 d4 d5 2 c4 c6 3 Nf3 Nf6 4 Nc3 dxc4 5 a4 Bf5 6 e3 | D18 Explore | Queen's Gambit Declined-Alapin Variation-Czech Defence-Dutch/Classical System |
| 1 d4 d5 2 c4 c6 3 Nf3 Nf6 4 Nc3 dxc4 5 a4 Bf5 6 e3 e6 7 Bxc4 Bb4 8 0-0 | D19 Explore | Queen's Gambit Declined-Alapin Variation-Czech Defence-Dutch System |
| 1 d4 d5 2 c4 c6 3 Nf3 Nf6 4 Nc3 dxc4 5 a4 Bf5 6 e3 e6 7 Bxc4 Bb4 8 0-0 0-0 9 Qe2 | D19 Explore | Queen's Gambit Declined-Czech Defence-Dutch System-Main Line |
| 1 d4 d5 2 c4 c6 3 Nf3 Nf6 4 Nc3 dxc4 5 a4 Bf5 6 e3 e6 7 Bxc4 Bb4 8 0-0 0-0 9 Qe2 Ne4 10 g4 | D19 Explore | Queen's Gambit Declined-Dutch System-Main Line-Sämisch Variation |
| 1 d4 d5 2 c4 c6 3 Nf3 Nf6 4 Nc3 dxc4 5 a4 Bf5 6 e3 Na6 | D18 Explore | Queen's Gambit Declined-Czech Defence-Dutch System-Lasker Variation |
| 1 d4 d5 2 c4 c6 3 Nf3 Nf6 4 Nc3 dxc4 5 a4 Bf5 6 Ne5 | D17 Explore | Queen's Gambit Declined-Alapin Variation-Czech Defence-Krause Attack |
| 1 d4 d5 2 c4 c6 3 Nf3 Nf6 4 Nc3 dxc4 5 a4 Bf5 6 Ne5 e6 | D17 Explore | Queen's Gambit Declined-Czech Defence-Krause Attack-Wiesbaden Variation |
| 1 d4 d5 2 c4 c6 3 Nf3 Nf6 4 Nc3 dxc4 5 a4 Bf5 6 Ne5 e6 7 f3 Bb4 8 e4 | D17 Explore | Queen's Gambit Declined-Krause Attack-Wiesbaden Variation-Sharp Line |
| 1 d4 d5 2 c4 c6 3 Nf3 Nf6 4 Nc3 dxc4 5 a4 Bf5 6 Ne5 Na6 7 e4 | D17 Explore | Queen's Gambit Declined-Czech Defence-Krause Attack-Fazekas Gambit |
| 1 d4 d5 2 c4 c6 3 Nf3 Nf6 4 Nc3 dxc4 5 a4 Bf5 6 Ne5 Nbd7 7 Nxc4 Qc7 8 g3 e5 | D17 Explore | Queen's Gambit Declined-Czech Defence-Krause Attack-Carlsbad Variation |
| 1 d4 d5 2 c4 c6 3 Nf3 Nf6 4 Nc3 dxc4 5 a4 Bf5 6 Ne5 Nbd7 7 Nxc4 Qc7 8 g3 e5 9 dxe5 Nxe5 10 Bf4 Nfd7 11 Bg2 g5 | D17 | Queen's Gambit Declined-Krause Attack-Carlsbad Variation-Morozevich Variation |
| 1 d4 d5 2 c4 c6 3 Nf3 Nf6 4 Nc3 dxc4 5 a4 Bf5 6 Nh4 | D17 | Queen's Gambit Declined-Alapin Variation-Czech Defence-Bled Attack |
| 1 d4 d5 2 c4 c6 3 Nf3 Nf6 4 Nc3 dxc4 5 a4 Bg4 | D16 | Queen's Gambit Declined-2 Knights Attack-Alapin Variation-Steiner Variation |
| 1 d4 d5 2 c4 c6 3 Nf3 Nf6 4 Nc3 dxc4 5 a4 Bg4 6 e3 b5 7 Bd2 a5 | D16 | Queen's Gambit Declined-Alapin Variation-Steiner Variation-Abraham Variation |
| 1 d4 d5 2 c4 c6 3 Nf3 Nf6 4 Nc3 dxc4 5 a4 e6 | D16 | Queen's Gambit Declined-2 Knights Attack-Alapin Variation-Soultanbeieff/Soultanbéiev Variation |
| 1 d4 d5 2 c4 c6 3 Nf3 Nf6 4 Nc3 dxc4 5 a4 Na6 (6 e4 Bg4) | D16 | Queen's Gambit Declined-2 Knights Attack-Alapin Variation-Smyslov Variation |
| 1 d4 d5 2 c4 c6 3 Nf3 Nf6 4 Nc3 dxc4 5 e3 | D15 | Queen's Gambit Declined-3 Knights Variation-2 Knights Attack-Alekhine Variation |
| 1 d4 d5 2 c4 c6 3 Nf3 Nf6 4 Nc3 dxc4 5 e4 | D15 | Queen's Gambit Declined-3 Knights Variation-2 Knights Attack-Slav/Geller Gambit |
| 1 d4 d5 2 c4 c6 3 Nf3 Nf6 4 Nc3 dxc4 5 e4 b5 6 e5 | D15 | Queen's Gambit Declined-2 Knights Attack-Slav Gambit-Tolush-Geller Gambit |
| 1 d4 d5 2 c4 c6 3 Nf3 Nf6 4 Nc3 g6 | D15 | Queen's Gambit Declined-Modern Line-3 Knights Variation-Schlechter Variation |
| 1 d4 d5 2 c4 c6 3 Nf3 Nf6 4 Nc3 Qb6 | D15 | Queen's Gambit Declined-Modern Line-3 Knights Variation-Süchting Variation |
| 1 d4 d5 2 c4 dxc4 | D20 Explore | Queen's Pawn-Queen's Gambit Accepted |
| 1 d4 d5 2 c4 dxc4 3 e3 | D20 | Queen's Pawn-Queen's Gambit Accepted-Old Variation |
| 1 d4 d5 2 c4 dxc4 3 e3 e5 4 Bxc4 exd4 5 Qb3 Qe7 6 a3 | D20 | Queen's Pawn-Queen's Gambit Accepted-Old Variation-Billinger Gambit |
| 1 d4 d5 2 c4 dxc4 3 e3 e5 4 Bxc4 exd4 5 Qb3 Qe7 6 Kf1 | D20 | Queen's Pawn-Queen's Gambit Accepted-Old Variation-Korchnoi Gambit |
| 1 d4 d5 2 c4 dxc4 3 e3 e5 4 Bxc4 exd4 5 Qb3 Qe7 6 Nd2 | D20 | Queen's Pawn-Queen's Gambit Accepted-Old Variation-Novikov Gambit |
| 1 d4 d5 2 c4 dxc4 3 e3 e5 4 Bxc4 exd4 5 Qb3 Qe7 6 Nf3 | D20 | Queen's Pawn-Queen's Gambit Accepted-Old Variation-Christensen Gambit |
| 1 d4 d5 2 c4 dxc4 3 e4 | D20 | Queen's Pawn-Queen's Gambit Accepted-Saduleto/Central Variation |
| 1 d4 d5 2 c4 dxc4 3 e4 b5 | D20 | Queen's Pawn-Queen's Gambit Accepted-Saduleto Variation-Greco Variation |
| 1 d4 d5 2 c4 dxc4 3 e4 c5 | D20 | Queen's Pawn-Queen's Gambit Accepted-Saduleto Variation-Rubinstein Defence |
| 1 d4 d5 2 c4 dxc4 3 e4 c5 4 d5 b5 | D20 | Queen's Gambit Accepted-Saduleto Variation-Rubinstein Defence-Yefimov Gambit |
| 1 d4 d5 2 c4 dxc4 3 e4 c5 4 d5 Nf6 5 Nc3 b5 | D20 | Queen's Gambit Accepted-Saduleto Variation-Rubinstein Defence-Linares Variation |
| 1 d4 d5 2 c4 dxc4 3 e4 e5 | D20 | Queen's Pawn-Queen's Gambit Accepted-Saduleto Variation-McDonnel Defence |
| 1 d4 d5 2 c4 dxc4 3 e4 e5 4 Bxc4 | D20 | Queen's Gambit Accepted-Saduleto Variation-McDonnel Defence-Somov Gambit |
| 1 d4 d5 2 c4 dxc4 3 e4 f5 | D20 | Queen's Pawn-Queen's Gambit Accepted-Saduleto Variation-Schwartz Defence |
| 1 d4 d5 2 c4 dxc4 3 e4 Nc6 | D20 | Queen's Pawn-Queen's Gambit Accepted-Saduleto Variation-Modern Defence |
| 1 d4 d5 2 c4 dxc4 3 e4 Nf6 | D20 | Queen's Pawn-Queen's Gambit Accepted-Saduleto Variation-Alekhine System |
| 1 d4 d5 2 c4 dxc4 3 Nc3 c5 4 d5 Nf6 5 Nf3 e6 6 e4 exd5 7 e5 | D20 | Queen's Pawn-Queen's Gambit Accepted-Prianishenmo Gambit |
| 1 d4 d5 2 c4 dxc4 3 Nf3 | D21 | Queen's Pawn-Queen's Gambit Accepted-Normal Variation |
| 1 d4 d5 2 c4 dxc4 3 Nf3 a6 | D21 | Queen's Pawn-Queen's Gambit Accepted-Normal Variation-Alekhine Defence |
| 1 d4 d5 2 c4 dxc4 3 Nf3 a6 4 e3 | D22 | Queen's Pawn-Queen's Gambit Accepted-Normal Variation-Alekhine Defence |
| 1 d4 d5 2 c4 dxc4 3 Nf3 a6 4 e3 b5 | D22 | Queen's Gambit Accepted-Normal Variation-Alekhine Defence-Haberditz Variation |
| 1 d4 d5 2 c4 dxc4 3 Nf3 a6 4 e3 Bg4 5 Bxc4 e6 6 d5 | D22 | Queen's Gambit Accepted-Normal Variation-Alekhine Defence-Alatortsev Variation |
| 1 d4 d5 2 c4 dxc4 3 Nf3 a6 4 e4 | D21 | Queen's Gambit Accepted-Normal Variation-Alekhine Defence-Borisenko-Furman Variation |
| 1 d4 d5 2 c4 dxc4 3 Nf3 b5 | D21 | Queen's Pawn-Queen's Gambit Accepted-Normal Variation-Ericson/Slav Gambit |
| 1 d4 d5 2 c4 dxc4 3 Nf3 c5 | D21 | Queen's Pawn-Queen's Gambit Accepted-Normal Variation-Gunsberg Defence |
| 1 d4 d5 2 c4 dxc4 3 Nf3 c5 4 d5 Nf6 5 Nc3 e6 6 e4 exd5 7 e5 | D24 | Queen's Gambit Accepted-Normal Variation-Gunsberg Defence-Prianishenmo Gambit |
| 1 d4 d5 2 c4 dxc4 3 Nf3 e6 | D21 | Queen's Pawn-Queen's Gambit Accepted-Normal Variation-Rosenthal Variation |
| 1 d4 d5 2 c4 dxc4 3 Nf3 Nd7 | D21 | Queen's Pawn-Queen's Gambit Accepted-Normal Variation-Godes Variation |
| 1 d4 d5 2 c4 dxc4 3 Nf3 Nf6 | D23 | Queen's Pawn-Queen's Gambit Accepted-Normal Variation |
| 1 d4 d5 2 c4 dxc4 3 Nf3 Nf6 4 e3 | D25 | Queen's Pawn-Queen's Gambit Accepted-Normal Variation |
| 1 d4 d5 2 c4 dxc4 3 Nf3 Nf6 4 e3 Be6 | D25 | Queen's Pawn-Queen's Gambit Accepted-Normal Variation-Flohr/Winawer Defece |
| 1 d4 d5 2 c4 dxc4 3 Nf3 Nf6 4 e3 Bg4 | D25 | Queen's Pawn-Queen's Gambit Accepted-Normal Variation-Janowski-Larsen Variation |
| 1 d4 d5 2 c4 dxc4 3 Nf3 Nf6 4 e3 e6 | D26 | Queen's Pawn-Queen's Gambit Accepted-Normal Variation-Traditional System |
| 1 d4 d5 2 c4 dxc4 3 Nf3 Nf6 4 e3 e6 5 Bxc4 c5 | D26 | Queen's Gambit Accepted-Normal Variation-Traditional System-Classical Defence |
| 1 d4 d5 2 c4 dxc4 3 Nf3 Nf6 4 e3 e6 5 Bxc4 c5 6 0-0 a6 | D27 | Queen's Gambit Accepted-Traditional System-Classical Defence-Main Line |
| 1 d4 d5 2 c4 dxc4 3 Nf3 Nf6 4 e3 e6 5 Bxc4 c5 6 0-0 a6 7 a4 | D27 | Queen's Gambit Accepted-Classical Defence-Main Line-Rubinstein Variation |
| 1 d4 d5 2 c4 dxc4 3 Nf3 Nf6 4 e3 e6 5 Bxc4 c5 6 0-0 a6 7 dxc5 Bxc5 | D27 | Queen's Gambit Accepted-Traditional System-Classical Defence-Main Line |
| 1 d4 d5 2 c4 dxc4 3 Nf3 Nf6 4 e3 e6 5 Bxc4 c5 6 0-0 a6 7 e4 | D27 | Queen's Gambit Accepted-Classical Defence-Main Line-Geller/Russian Gambit |
| 1 d4 d5 2 c4 dxc4 3 Nf3 Nf6 4 e3 e6 5 Bxc4 c5 6 0-0 a6 7 Qe2 | D28 | Queen's Gambit Accepted-Classical Defence-Main Line-Alekhine System |
| 1 d4 d5 2 c4 dxc4 3 Nf3 Nf6 4 e3 e6 5 Bxc4 c5 6 0-0 a6 7 Qe2 b5 | D28 | Queen's Gambit Accepted-Classical Defence-Alekhine System-Except Main Line |
| 1 d4 d5 2 c4 dxc4 3 Nf3 Nf6 4 e3 e6 5 Bxc4 c5 6 0-0 a6 7 Qe2 b5 8 Bb3 Bb7 | D29 | Queen's Gambit Accepted-Classical Defence-Alekhine System-Except Main Line |
| 1 d4 d5 2 c4 dxc4 3 Nf3 Nf6 4 e3 e6 5 Bxc4 c5 6 0-0 a6 7 Qe2 b5 8 Bb3 Bb7 9 Rd1 Nbd7 10 Nc3 Bd6 | D29 | Queen's Gambit Accepted-Alekhine System-Except Main Line-Smyslov Variation |
| 1 d4 d5 2 c4 dxc4 3 Nf3 Nf6 4 e3 e6 5 Bxc4 c5 6 0-0 a6 7 Qe2 b5 8 Bb3 Nc6 9 Rd1 c4 10 Bc2 Nb4 11 Nc3 Nxc2 12 Qxc2 Bb7 13 d5 Qc7 | D28 | Queen's Gambit Accepted-Alekhine System-Except Main Line-Flohr Variation |
| 1 d4 d5 2 c4 dxc4 3 Nf3 Nf6 4 e3 e6 5 Bxc4 c5 6 0-0 a6 7 Qe2 Nc6 8 dxc5 Bxc5 9 e4 b5 10 e5 | D28 | Queen's Gambit Accepted-Classical Defence-Alekhine System-Furman Variation |
| 1 d4 d5 2 c4 dxc4 3 Nf3 Nf6 4 e3 e6 5 Bxc4 c5 6 0-0 a6 7 Qe2 Nc6 8 Rd1 b5 9 Bb3 c4 10 Bc2 Nb4 11 Nc3 Nxc2 12 Qxc2 Bb7 13 d5 Qc7 | D28 | Queen's Gambit Accepted-Classical Defence-Alekhine System-Flohr Variation |
| 1 d4 d5 2 c4 dxc4 3 Nf3 Nf6 4 e3 e6 5 Bxc4 c5 6 0-0 cxd4 | D26 | Queen's Gambit Accepted-Traditional System-Classical Defence-Steinitz/Exchange Variation |
| 1 d4 d5 2 c4 dxc4 3 Nf3 Nf6 4 e3 e6 5 Bxc4 c5 6 0-0 Nc6 | D26 | Queen's Gambit Accepted-Traditional System-Classical Defence-Development Variation |
| 1 d4 d5 2 c4 dxc4 3 Nf3 Nf6 4 e3 e6 5 Bxc4 c5 6 Qe2 | D26 | Queen's Gambit Accepted-Traditional System-Classical Defence-Primitive Furman Variation |
| 1 d4 d5 2 c4 dxc4 3 Nf3 Nf6 4 e3 e6 5 Bxc4 c5 6 Qe2 a6 7 dxc5 Bxc5 8 0-0 Nc6 9 e4 b5 10 e5 | D26 | Queen's Gambit Accepted-Classical Defence-Primitive Furman Variation-Furman Variation |
| 1 d4 d5 2 c4 dxc4 3 Nf3 Nf6 4 e3 g6 | D25 | Queen's Pawn-Queen's Gambit Accepted-Normal Variation-Smyslov Variation |
| 1 d4 d5 2 c4 dxc4 3 Nf3 Nf6 4 Nc3 | D24 | Queen's Pawn-Queen's Gambit Accepted-Normal Variation-Showalter Variation |
| 1 d4 d5 2 c4 dxc4 3 Nf3 Nf6 4 Nc3 a6 5 e4 | D24 | Queen's Gambit Accepted-Normal Variation-Showalter Variation-Bogoljubov Defence |
| 1 d4 d5 2 c4 dxc4 3 Nf3 Nf6 4 Qa4+ | D23 | Queen's Pawn-Queen's Gambit Accepted-Normal Variation-Mannheim Variation |
| 1 d4 d5 2 c4 dxc4 3 Qa4+ | D20 | Queen's Pawn-Queen's Gambit Accepted-Accelerated Mannheim Variation |
| 1 d4 d5 2 c4 e5 | D08 Explore | Queen's Pawn-Queen's Gambit Declined-Albin Countergambit |
| 1 d4 d5 2 c4 e5 3 dxe5 d4 4 e3 Bb4+ 5 Bd2 dxe3 | D08 | Queen's Pawn-Queen's Gambit Declined-Albin Countergambit-Lasker Trap |
| 1 d4 d5 2 c4 e5 3 dxe5 d4 4 Nf3 | D08 | Queen's Pawn-Queen's Gambit Declined-Albin Countergambit-Normal Line |
| 1 d4 d5 2 c4 e5 3 dxe5 d4 4 Nf3 c5 | D08 | Queen's Gambit Declined-Albin Countergambit-Normal Line-Tartakower Defence |
| 1 d4 d5 2 c4 e5 3 dxe5 d4 4 Nf3 Nc6 5 g3 | D09 | Queen's Gambit Declined-Albin Countergambit-Normal Line-Fianchetto Variation |
| 1 d4 d5 2 c4 e5 3 dxe5 d4 4 Nf3 Nc6 5 Nbd2 | D08 | Queen's Gambit Declined-Albin Countergambit-Normal Line-Alapin/Modern Line |
| 1 d4 d5 2 c4 e5 3 dxe5 d4 4 Nf3 Nc6 5 Nbd2 Bg4 6 h3 Bxf3 7 Nxf3 Bb4+ 8 Bd2 Qe7 | D08 | Queen's Gambit Declined-Albin Countergambit-Alapin Variation-Krénosz Variation |
| 1 d4 d5 2 c4 e5 3 dxe5 d4 4 Nf3 Nc6 5 Nbd2 f6 | D08 | Queen's Gambit Declined-Albin Countergambit-Alapin Variation-Janowski Variation |
| 1 d4 d5 2 c4 e5 3 dxe5 d4 4 Nf3 Nc6 5 Nbd2 Qe7 | D08 | Queen's Gambit Declined-Albin Countergambit-Alapin Variation-Balogh Variation |
| 1 d4 d5 2 c4 e6 | D30 Explore | Queen's Pawn-Queen's Gambit Declined |
| 1 d4 d5 2 c4 e6 3 Nc3 | D31 Explore | Queen's Pawn-Queen's Gambit Declined-Queen's Knight Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 a6 | D31 | Queen's Pawn-Queen's Gambit Declined-Queen's Knight Variation-Janowski Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 b6 | D31 | Queen's Pawn-Queen's Gambit Declined-Queen's Knight Variation-Alapin Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Be7 | D31 | Queen's Pawn-Queen's Gambit Declined-Queen's Knight Variation-Charousek/Petrosian Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Be7 4 e4 dxe4 5 f3 | D31 | Queen's Gambit Declined-Queen's Knight Variation-Charousek Variation-Miladinovic Gambit |
| 1 d4 d5 2 c4 e6 3 Nc3 c5 | D32 | Queen's Pawn-Queen's Gambit Declined-Queen's Knight Variation-Tarrasch Defence |
| 1 d4 d5 2 c4 e6 3 Nc3 c5 4 cxd5 cxd4 | D32 | Queen's Gambit Declined-Queen's Knight Variation-Tarrasch Defence-Von Hennig-Schara Gambit |
| 1 d4 d5 2 c4 e6 3 Nc3 c5 4 cxd5 cxd4 5 Qxd4 Nc6 6 Qd1 exd5 7 Qxd5 Be6 | D32 | Queen's Gambit Declined-Tarrasch Defence-Von Hennig-Schara Gambit-von Hennig Gambit |
| 1 d4 d5 2 c4 e6 3 Nc3 c5 4 cxd5 exd5 5 dxc5 d4 6 Na4 b5 | D32 | Queen's Gambit Declined-Queen's Knight Variation-Tarrasch Defence-Tarrasch Gambit |
| 1 d4 d5 2 c4 e6 3 Nc3 c5 4 cxd5 exd5 5 e4 | D32 | Queen's Gambit Declined-Queen's Knight Variation-Tarrasch Defence-Marshall Gambit |
| 1 d4 d5 2 c4 e6 3 Nc3 c5 4 cxd5 exd5 5 Nf3 | D32 | Queen's Gambit Declined-Queen's Knight Variation-Tarrasch Defence-2 Knights Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 c5 4 cxd5 exd5 5 Nf3 Nc6 6 dxc5 d4 7 Na4 b5 | D32 | Queen's Gambit Declined-Tarrasch Defence-2 Knights Variation-Gruenfeld Gambit |
| 1 d4 d5 2 c4 e6 3 Nc3 c5 4 cxd5 exd5 5 Nf3 Nc6 6 g3 | D33 | Queen's Gambit Declined-Tarrasch Defence-2 Knights Variation-Schlechter-Rubinstein System |
| 1 d4 d5 2 c4 e6 3 Nc3 c5 4 cxd5 exd5 5 Nf3 Nc6 6 g3 c4 | D33 | Queen's Gambit Declined-2 Knights Variation-Schlechter-Rubinstein System-Folkestone/Swedish Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 c5 4 cxd5 exd5 5 Nf3 Nc6 6 g3 c4 7 e4 | D33 | Queen's Gambit Declined-Schlechter-Rubinstein System-Folkestone Variation-Rey Ardid/Central Break Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 c5 4 cxd5 exd5 5 Nf3 Nc6 6 g3 Nf6 | D33 | Queen's Gambit Declined-2 Knights Variation-Schlechter-Rubinstein System-Prague Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 c5 4 cxd5 exd5 5 Nf3 Nc6 6 g3 Nf6 7 Bg2 Be7 | D34 | Queen's Gambit Declined-Schlechter-Rubinstein System-Prague Variation-Main Line |
| 1 d4 d5 2 c4 e6 3 Nc3 c5 4 cxd5 exd5 5 Nf3 Nc6 6 g3 Nf6 7 Bg2 Be7 8 0-0 0-0 | D34 | Queen's Gambit Declined-Prague Variation-Main Line-Classical Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 c5 4 cxd5 exd5 5 Nf3 Nc6 6 g3 Nf6 7 Bg2 Be7 8 0-0 0-0 9 Bg5 | D34 | Queen's Gambit Declined-Prague Variation-Classical Variation-Carlsbad Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 c5 4 cxd5 exd5 5 Nf3 Nc6 6 g3 Nf6 7 Bg2 Be7 8 0-0 0-0 9 Bg5 Be6 | D34 | Queen's Gambit Declined-Classical Variation-Carlsbad Variation-Endgame Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 c5 4 cxd5 exd5 5 Nf3 Nc6 6 g3 Nf6 7 Bg2 Be7 8 0-0 0-0 9 Bg5 Be6 10 Rc1 b6 | D34 | Queen's Gambit Declined-Carlsbad Variation-Endgame Variation-Stoltz Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 c5 4 cxd5 exd5 5 Nf3 Nc6 6 g3 Nf6 7 Bg2 Be7 8 0-0 0-0 9 Bg5 Be6 10 Rc1 c4 | D34 | Queen's Gambit Declined-Carlsbad Variation-Endgame Variation-Bogoljubov Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 c5 4 cxd5 exd5 5 Nf3 Nc6 6 g3 Nf6 7 Bg2 Be7 8 0-0 0-0 9 Bg5 c4 | D34 | Queen's Gambit Declined-Classical Variation-Carlsbad Variation-Advance Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 c5 4 cxd5 exd5 5 Nf3 Nc6 6 g3 Nf6 7 Bg2 Be7 8 0-0 0-0 9 Bg5 cxd4 10 Nxd4 h6 11 Be3 Bg4 | D34 | Queen's Gambit Declined-Classical Variation-Carlsbad Variation-Spassky Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 c5 4 cxd5 exd5 5 Nf3 Nc6 6 g3 Nf6 7 Bg2 Be7 8 0-0 0-0 9 Bg5 cxd4 10 Nxd4 h6 11 Be3 Re8 12 Rc1 Be6 | D34 | Queen's Gambit Declined-Classical Variation-Carlsbad Variation-Chandler Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 c5 4 cxd5 exd5 5 Nf3 Nc6 6 g3 Nf6 7 Bg2 Be7 8 0-0 0-0 9 Bg5 cxd4 10 Nxd4 Re8 | D34 | Queen's Gambit Declined-Classical Variation-Carlsbad Variation-Petursson Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 c5 4 cxd5 exd5 5 Nf3 Nc6 6 g3 Nf6 7 Bg2 Be7 8 0-0 0-0 9 dxc5 Bxc5 10 Na4 | D34 | Queen's Gambit Declined-Prague Variation-Classical Variation-Réti Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 c5 4 cxd5 exd5 5 Nf3 Nc6 6 g3 Nf6 7 Bg2 Be7 8 0-0 0-0 9 dxc5 d4 | D34 | Queen's Gambit Declined-Prague Variation-Classical Variation-Classical Tarrasch Gambit |
| 1 d4 d5 2 c4 e6 3 Nc3 c5 4 cxd5 exd5 5 Nf3 Nc6 6 g3 Nf6 7 Bg2 Bg4 | D33 | Queen's Gambit Declined-Schlechter-Rubinstein System-Prague Variation-Wagner Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 c5 4 e3 Nf6 5 Nf3 Nc6 | D32 | Queen's Gambit Declined-Queen's Knight Variation-Tarrasch Defence-Symmetrical Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 c6 | D31 | Queen's Pawn-Queen's Gambit Declined-Queen's Knight Variation-Accelerated Semi-Slav/Old Semi-Slav Defence |
| 1 d4 d5 2 c4 e6 3 Nc3 c6 4 e3 f5 5 g4 | D31 | Queen's Gambit Declined-Queen's Knight Variation-Accelerated Semi-Slav Defence-Portisch Gambit |
| 1 d4 d5 2 c4 e6 3 Nc3 c6 4 e4 | D31 | Queen's Gambit Declined-Queen's Knight Variation-Accelerated Semi-Slav Defence-Marshall Gambit |
| 1 d4 d5 2 c4 e6 3 Nc3 c6 4 e4 dxe4 5 f3 | D31 | Queen's Gambit Declined-Accelerated Semi-Slav Defence-Marshall Gambit-Gunderam Gambit |
| 1 d4 d5 2 c4 e6 3 Nc3 c6 4 e4 dxe4 5 Nxe4 Bb4+ 6 Bd2 | D31 | Queen's Gambit Declined-Accelerated Semi-Slav Defence-Marshall Gambit-Main Line |
| 1 d4 d5 2 c4 e6 3 Nc3 c6 4 e4 dxe4 5 Nxe4 Bb4+ 6 Bd2 Qxd4 7 Bxb4 Qxe4+ | D31 | Queen's Gambit Declined-Marshall Gambit-Main Line-Slav Gambit |
| 1 d4 d5 2 c4 e6 3 Nc3 c6 4 e4 dxe4 5 Nxe4 Bb4+ 6 Bd2 Qxd4 7 Bxb4 Qxe4+ 8 Be2 c5 9 Bxc5 Qxg2 | D31 | Queen's Gambit Declined-Marshall Gambit-Slav Gambit-Tolush Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 c6 4 e4 dxe4 5 Nxe4 Bb4+ 6 Nc3 | D31 | Queen's Gambit Declined-Accelerated Semi-Slav Defence-Marshall Gambit-Forgotten Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 c6 4 Nf3 dxc4 | D31 | Queen's Gambit Declined-Queen's Knight Variation-Accelerated Semi-Slav Defence-Noteboom Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 c6 4 Nf3 dxc4 5 a4 Bb4 6 e3 b5 (7 Bd2 a5) (8 axb5 Bxc3 9 Bxc3 cxb5 10 b3 Bb7) | D31 | Queen's Gambit Declined-Accelerated Semi-Slav Defence-Noteboom Variation-Abrahams Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 c6 4 Nf3 dxc4 5 a4 Bb4 6 e3 b5 7 Bd2 Qb6 | D31 | Queen's Gambit Declined-Queen's Knight Variation-Accelerated Semi-Slav Defence-Noteboom Variation-Junge Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 c6 4 Nf3 dxc4 5 a4 Bb4 6 e3 b5 7 Bd2 Qe7 | D31 | Queen's Gambit Declined-Queen's Knight Variation-Accelerated Semi-Slav Defence-Noteboom Variation-Koomen Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 c6 4 Nf3 dxc4 5 Bg5 | D31 | Queen's Gambit Declined-Accelerated Semi-Slav Defence-Noteboom Variation-Anti-Noteboom Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 c6 4 Nf3 dxc4 5 Bg5 f6 | D31 | Queen's Gambit Declined-Noteboom Variation-Anti-Noteboom Variation-Belyavsky Line |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 | D35 | Queen's Pawn-Queen's Gambit Declined-Queen's Knight Variation-Normal Defence |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Bf4 | D35 | Queen's Gambit Declined-Queen's Knight Variation-Normal Defence-Harrwitz Attack |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Bg5 | D50 | Queen's Gambit Declined-Queen's Knight Variation-Normal Defence-Modern/Semi-Pillsbury Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Bg5 Be7 | D53 | Queen's Gambit Declined-Normal Defence-Modern Variation-Pillsbury Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Bg5 Be7 5 Bxf6 | D53 | Queen's Gambit Declined-Modern Variation-Pillsbury Variation-Heral Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Bg5 Be7 5 e3 0-0 6 Nf3 | D55 | Queen's Gambit Declined-Normal Defence-Modern Variation-Pillsbury Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Bg5 Be7 5 e3 0-0 6 Nf3 b6 7 Bd3 Bb7 8 cxd5 exd5 9 Ne5 | D55 | Queen's Gambit Declined-Modern Variation-Pillsbury Variation-Pillsbury Attack |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Bg5 Be7 5 e3 0-0 6 Nf3 h6 | D55 | Queen's Gambit Declined-Modern Variation-Pillsbury Variation-Neo-Orthodox Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Bg5 Be7 5 e3 0-0 6 Nf3 h6 7 Bh4 | D56 | Queen's Gambit Declined-Pillsbury Variation-Neo-Orthodox Variation-Main Line |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Bg5 Be7 5 e3 0-0 6 Nf3 h6 7 Bh4 b6 | D58 | Queen's Gambit Declined-Neo-Orthodox Variation-Main Line-Tartakower/Makagonov-Bondarevsky System |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Bg5 Be7 5 e3 0-0 6 Nf3 h6 7 Bh4 b6 8 cxd5 exd5 | D58 | Queen's Gambit Declined-Neo-Orthodox Variation-Makagonov-Bondarevsky System-Exchange Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Bg5 Be7 5 e3 0-0 6 Nf3 h6 7 Bh4 b6 8 cxd5 Nxd5 | D59 | Queen's Gambit Declined-Neo-Orthodox Variation-Makagonov-Bondarevsky System-Makogonov Exchange Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Bg5 Be7 5 e3 0-0 6 Nf3 h6 7 Bh4 b6 8 cxd5 Nxd5 9 Bxe7 Qxe7 10 Nxd5 exd5 11 Rc1 Be6 | D59 | Queen's Gambit Declined-Makagonov-Bondarevsky System-Makogonov Exchange Variation-Tartakower Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Bg5 Be7 5 e3 0-0 6 Nf3 h6 7 Bh4 Ne4 | D56 | Queen's Gambit Declined-Neo-Orthodox Variation-Main Line-Lasker Defence |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Bg5 Be7 5 e3 0-0 6 Nf3 h6 7 Bh4 Ne4 8 Bxe7 Qxe7 (9 cxd5 Nxc3 10 bxc3) | D57 | Queen's Gambit Declined-Neo-Orthodox Variation-Lasker Defence-Main Line |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Bg5 Be7 5 e3 0-0 6 Nf3 h6 7 Bh4 Ne4 8 Bxe7 Qxe7 9 cxd5 Nxc3 10 bxc3 exd5 11 Qb3 Qd6 | D57 | Queen's Gambit Declined-Lasker Defence-Main Line-Bernstein Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Bg5 Be7 5 e3 0-0 6 Nf3 h6 7 Bh4 Ne4 8 Bxe7 Qxe7 9 cxd5 Nxc3 10 bxc3 exd5 11 Qb3 Rd8 12 c4 Be6 | D57 | Queen's Gambit Declined-Lasker Defence-Main Line-Mar del Plata Gambit |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Bg5 Be7 5 e3 0-0 6 Nf3 h6 7 Bh4 Ne4 8 Bxe7 Qxe7 9 Qc2 | D56 | Queen's Gambit Declined-Neo-Orthodox Variation-Lasker Defence-Teichmann Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Bg5 Be7 5 e3 0-0 6 Nf3 h6 7 Bh4 Ne4 8 Bxe7 Qxe7 9 Qc2 Nf6 10 Bd3 dxc4 11 Bxc4 c5 12 0-0 Nc6 13 Rfd1 Bd7 | D56 | Queen's Gambit Declined-Lasker Defence-Teichmann Variation-Russian Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Bg5 Be7 5 e3 0-0 6 Nf3 h6 7 Bh4 Ne4 8 Bxe7 Qxe7 9 Rc1 | D56 | Queen's Gambit Declined-Neo-Orthodox Variation-Lasker Defence-Modern Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Bg5 Be7 5 e3 0-0 6 Nf3 h6 7 Bxf6 | D55 | Queen's Gambit Declined-Pillsbury Variation-Neo-Orthodox Variation-Anti-Tartakower Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Bg5 Be7 5 e3 0-0 6 Nf3 h6 7 Bxf6 Bxf6 8 Rc1 c6 9 Bd3 Nd7 10 0-0 dxc4 11 Bxc4 | D55 | Queen's Gambit Declined-Neo-Orthodox Variation-Anti-Tartakower Variation-Petrosian Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Bg5 Be7 5 e3 0-0 6 Nf3 Nbd7 | D60 | Queen's Gambit Declined-Modern Variation-Pillsbury Variation-Orthodox Defence |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Bg5 Be7 5 e3 0-0 6 Nf3 Nbd7 7 Bd3 | D60 | Queen's Gambit Declined-Pillsbury Variation-Orthodox Defence-Botvinnik Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Bg5 Be7 5 e3 0-0 6 Nf3 Nbd7 7 cxd5 | D60 | Queen's Gambit Declined-Pillsbury Variation-Orthodox Defence-Exchange Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Bg5 Be7 5 e3 0-0 6 Nf3 Nbd7 7 Qb3 | D60 | Queen's Gambit Declined-Pillsbury Variation-Orthodox Defence-Rauzer Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Bg5 Be7 5 e3 0-0 6 Nf3 Nbd7 7 Qc2 | D61 | Queen's Gambit Declined-Pillsbury Variation-Orthodox Defence-Rubinstein Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Bg5 Be7 5 e3 0-0 6 Nf3 Nbd7 7 Qc2 c5 8 cxd5 | D62 | Queen's Gambit Declined-Orthodox Defence-Rubinstein Variation-Flohr Line |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Bg5 Be7 5 e3 0-0 6 Nf3 Nbd7 7 Rc1 | D63 | Queen's Gambit Declined-Pillsbury Variation-Orthodox Defence-Main Line |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Bg5 Be7 5 e3 0-0 6 Nf3 Nbd7 7 Rc1 a6 | D63 | Queen's Gambit Declined-Orthodox Defence-Main Line-Swiss/Henneberger/Hennegerger Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Bg5 Be7 5 e3 0-0 6 Nf3 Nbd7 7 Rc1 a6 8 cxd5 | D63 | Queen's Gambit Declined-Orthodox Defence-Swiss Variation-Karlsbad/Carlsbad Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Bg5 Be7 5 e3 0-0 6 Nf3 Nbd7 7 Rc1 b6 8 cxd5 exd5 9 Bb5 | D63 | Queen's Gambit Declined-Orthodox Defence-Main Line-Capablanca Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Bg5 Be7 5 e3 0-0 6 Nf3 Nbd7 7 Rc1 b6 8 cxd5 exd5 9 Bd3 | D63 | Queen's Gambit Declined-Orthodox Defence-Main Line-Pillsbury Attack |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Bg5 Be7 5 e3 0-0 6 Nf3 Nbd7 7 Rc1 b6 8 cxd5 exd5 9 Qa4 | D63 | Queen's Gambit Declined-Orthodox Defence-Main Line-Duras Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Bg5 Be7 5 e3 0-0 6 Nf3 Nbd7 7 Rc1 c6 | D63 | Queen's Gambit Declined-Orthodox Defence-Main Line-Classical Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Bg5 Be7 5 e3 0-0 6 Nf3 Nbd7 7 Rc1 c6 8 Bd3 | D66 | Queen's Gambit Declined-Orthodox Defence-Main Line-Classical Variation (Capablanca Variation) |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Bg5 Be7 5 e3 0-0 6 Nf3 Nbd7 7 Rc1 c6 8 Bd3 dxc4 9 Bxc4 b5 | D66 | Queen's Gambit Declined-Orthodox Defence-Classical Variation-Fianchetto Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Bg5 Be7 5 e3 0-0 6 Nf3 Nbd7 7 Rc1 c6 8 Bd3 dxc4 9 Bxc4 Nd5 | D67 | Queen's Gambit Declined-Orthodox Defence-Classical Variation-Capablanca Freeing Manoevre |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Bg5 Be7 5 e3 0-0 6 Nf3 Nbd7 7 Rc1 c6 8 Bd3 dxc4 9 Bxc4 Nd5 10 Bxe7 Qxe7 11 0-0 Nxc3 12 Rxc3 e5 | D68 | Queen's Gambit Declined-Orthodox Defence-Capablanca Freeing Manoevre-Classical Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Bg5 Be7 5 e3 0-0 6 Nf3 Nbd7 7 Rc1 c6 8 Bd3 dxc4 9 Bxc4 Nd5 10 Bxe7 Qxe7 11 0-0 Nxc3 12 Rxc3 e5 13 dxe5 (Nxe5 14 Nxe5) (Qxe5) | D69 | Queen's Gambit Declined-Orthodox Defence-Capablanca Freeing Manoevre-Classical Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Bg5 Be7 5 e3 0-0 6 Nf3 Nbd7 7 Rc1 c6 8 Bd3 dxc4 9 Bxc4 Nd5 10 Bxe7 Qxe7 11 0-0 Nxc3 12 Rxc3 e5 13 dxe5 Nxe5 14 Nxe5 Qxe5 15 f4 | D69 | Queen's Gambit Declined-Capablanca Freeing Manoevre-Classical Variation-Rubinstein Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Bg5 Be7 5 e3 0-0 6 Nf3 Nbd7 7 Rc1 c6 8 Bd3 dxc4 9 Bxc4 Nd5 10 Bxe7 Qxe7 11 0-0 Nxc3 12 Rxc3 e5 13 Qb1 | D68 | Queen's Gambit Declined-Capablanca Freeing Manoevre-Classical Variation-Maróczy Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Bg5 Be7 5 e3 0-0 6 Nf3 Nbd7 7 Rc1 c6 8 Bd3 dxc4 9 Bxc4 Nd5 10 Bxe7 Qxe7 11 0-0 Nxc3 12 Rxc3 e5 13 Qc2 | D68 | Queen's Gambit Declined-Capablanca Freeing Manoevre-Classical Variation-Vidmar Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Bg5 Be7 5 e3 0-0 6 Nf3 Nbd7 7 Rc1 c6 8 Bd3 dxc4 9 Bxc4 Nd5 10 Bxe7 Qxe7 11 Ne4 | D67 | Queen's Gambit Declined-Classical Variation-Capablanca Freeing Manoevre-Alekhine Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Bg5 Be7 5 e3 0-0 6 Nf3 Nbd7 7 Rc1 c6 8 Bd3 dxc4 9 Bxc4 Nd5 10 h4 | D67 | Queen's Gambit Declined-Classical Variation-Capablanca Freeing Manoevre-Janowski Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Bg5 Be7 5 e3 0-0 6 Nf3 Nbd7 7 Rc1 c6 8 Qc2 | D64 | Queen's Gambit Declined-Orthodox Defence-Classical Variation-Rubinstein Attack |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Bg5 Be7 5 e3 0-0 6 Nf3 Nbd7 7 Rc1 c6 8 Qc2 a6 | D64 | Queen's Gambit Declined-Classical Variation-Rubinstein Attack-Karlsbad/Carlsbad Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Bg5 Be7 5 e3 0-0 6 Nf3 Nbd7 7 Rc1 c6 8 Qc2 a6 9 a3 | D64 | Queen's Gambit Declined-Rubinstein Attack-Karlsbad Variation-Grünfeld Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Bg5 Be7 5 e3 0-0 6 Nf3 Nbd7 7 Rc1 c6 8 Qc2 a6 9 cxd5 | D65 | Queen's Gambit Declined-Rubinstein Attack-Karlsbad Variation-Main Line |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Bg5 Be7 5 e3 0-0 6 Nf3 Nbd7 7 Rc1 c6 8 Qc2 Ne4 | D64 | Queen's Gambit Declined-Classical Variation-Rubinstein Attack-Wolf Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Bg5 Be7 5 e3 0-0 6 Rc1 | D54 | Queen's Gambit Declined-Modern Variation-Pillsbury Variation-Anti-Neo-Orthodox Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Bg5 Be7 5 e3 Ne4 | D53 | Queen's Gambit Declined-Modern Variation-Pillsbury Variation-Lasker Defence |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Bg5 Be7 5 Nf3 0-0 6 Qc2 | D53 | Queen's Gambit Declined-Pillsbury Variation-Miles Variation-Dzhindzhi Attack |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Bg5 Be7 5 Nf3 c6 6 e4 | D53 | Queen's Gambit Declined-Modern Variation-Pillsbury Variation-Alekhine Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Bg5 Be7 5 Nf3 h6 6 Bh4 0-0 7 Rc1 dxc4 | D53 | Queen's Gambit Declined-Modern Variation-Pillsbury Variation-Uhlmann Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Bg5 c5 | D50 | Queen's Gambit Declined-Normal Defence-Modern Variation-Been-Koomen Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Bg5 c5 5 cxd5 | D50 | Queen's Gambit Declined-Modern Variation-Been-Koomen Variation-Semi-Tarrasch/Pseudo-Tarrasch Defence |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Bg5 c5 5 cxd5 Qb6 | D50 | Queen's Gambit Declined-Been-Koomen Variation-Semi-Tarrasch Defence-Canal/Venice Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Bg5 c5 5 Nf3 | D50 | Queen's Gambit Declined-Modern Variation-Been-Koomen Variation-Semi-Tarrasch Defence |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Bg5 c5 5 Nf3 cxd4 6 Nxd4 e5 7 Ndb5 a6 8 Qa4 | D50 | Queen's Gambit Declined-Been-Koomen Variation-Semi-Tarrasch Defence-Krause Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Bg5 c5 5 Nf3 cxd4 6 Qxd4 | D50 | Queen's Gambit Declined-Been-Koomen Variation-Semi-Tarrasch Defence-Primitive Pillsbury Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Bg5 Nbd7 | D51 | Queen's Gambit Declined-Normal Defence-Modern Variation-Knight Defence |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Bg5 Nbd7 5 e3 Bb4 | D51 | Queen's Gambit Declined-Modern Variation-Knight Defence-The Manhattan Defence |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Bg5 Nbd7 5 e3 Bb4 6 Nf3 c5 | D51 | Queen's Gambit Declined-Knight Defence-The Manhattan Defence-Westphalian Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Bg5 Nbd7 5 e3 c6 6 a3 | D51 | Queen's Gambit Declined-Modern Variation-Knight Defence-Capablanca Anti-Cambridge Springs Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Bg5 Nbd7 5 e3 c6 6 cxd5 | D51 | Queen's Gambit Declined-Modern Variation-Knight Defence-Exchange Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Bg5 Nbd7 5 e3 c6 6 Nf3 | D52 | Queen's Gambit Declined-Normal Defence-Modern Variation-Knight Defence |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Bg5 Nbd7 5 e3 c6 6 Nf3 Qa5 | D52 | Queen's Gambit Declined-Modern Variation-Knight Defence-Cambridge Springs Defence |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Bg5 Nbd7 5 e3 c6 6 Nf3 Qa5 7 Bxf6 | D52 | Queen's Gambit Declined-Knight Defence-Cambridge Springs Defence-Capablanca Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Bg5 Nbd7 5 e3 c6 6 Nf3 Qa5 7 cxd5 Nxd5 | D52 | Queen's Gambit Declined-Knight Defence-Cambridge Springs Defence-Yugoslav Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Bg5 Nbd7 5 e3 c6 6 Nf3 Qa5 7 Nd2 Bb4 8 Qc2 | D52 | Queen's Gambit Declined-Knight Defence-Cambridge Springs Defence-Bogoljubov Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Bg5 Nbd7 5 e3 c6 6 Nf3 Qa5 7 Nd2 Bb4 8 Qc2 0-0 9 Bh4 | D52 | Queen's Gambit Declined-Cambridge Springs Defence-Bogoljubov Variation-Argentine Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Bg5 Nbd7 5 e3 c6 6 Nf3 Qa5 7 Nd2 dxc4 | D52 | Queen's Gambit Declined-Knight Defence-Cambridge Springs Defence-Rubinstein Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Bg5 Nbd7 5 Nf3 Bb4 | D51 | Queen's Gambit Declined-Modern Variation-Knight Defence-New York Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Bg5 Nbd7 5 Nf3 c6 6 e3 Qa5 | D52 | Queen's Gambit Declined-Modern Variation-Knight Defence-Cambridge Springs Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Bg5 Nbd7 5 Nf3 c6 6 e4 | D51 | Queen's Gambit Declined-Modern Variation-Knight Defence-Alekhine Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Bg5 Nbd7 5 Nf3 c6 6 Rc1 Qa5 7 Bd2 | D51 | Queen's Gambit Declined-Modern Variation-Knight Defence-Rochlin Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Bg5 Nbd7 5 Nf3 h6 6 Bh4 dxc4 | D51 | Queen's Gambit Declined-Modern Variation-Knight Defence-Alekhine Gambit |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 cxd5 | D35 | Queen's Gambit Declined-Queen's Knight Variation-Normal Defence-Exchange Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 cxd5 exd5 5 Bg5 | D35 | Queen's Gambit Declined-Normal Defence-Exchange Variation-Positional Line |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 cxd5 exd5 5 Bg5 Be7 6 e3 0-0 7 Bd3 Nbd7 8 Qc2 Re8 9 Nge2 Nf8 10 0-0-0 | D35 | Queen's Gambit Declined-Exchange Variation-Positional Line-Chameleon Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 cxd5 exd5 5 Bg5 c6 6 Qc2 | D36 | Queen's Gambit Declined-Exchange Variation-Positional Line-Reshevsky Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 cxd5 exd5 5 Nf3 Nbd7 6 Bf4 | D35 | Queen's Gambit Declined-Normal Defence-Exchange Variation-Sämisch Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Nf3 | D37 | Queen's Gambit Declined-Queen's Knight Variation-Normal Defence-3 Knights Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Nf3 Bb4 | D38 | Queen's Gambit Declined-Normal Defence-3 Knights Variation-Ragozin Defence |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Nf3 Bb4 5 Bg5 dxc4 | D39 | Queen's Gambit Declined-3 Knights Variation-Ragozin Defence-Vienna Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Nf3 Bb4 5 Bg5 h6 | D38 | Queen's Gambit Declined-3 Knights Variation-Ragozin Defence-Moscow Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Nf3 Bb4 5 Qa4+ | D38 | Queen's Gambit Declined-3 Knights Variation-Ragozin Defence-Alekhine Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Nf3 Be7 5 Bf4 | D37 | Queen's Gambit Declined-Normal Defence-3 Knights Variation-Classical/Harrwitz Attack |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Nf3 Be7 5 Bf4 0-0 6 e3 b6 | D37 | Queen's Gambit Declined-3 Knights Variation-Harrwitz Attack-Fianchetto Defence |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Nf3 Be7 5 Bf4 0-0 6 e3 c5 7 dxc5 Bxc5 | D37 | Queen's Gambit Declined-3 Knights Variation-Harrwitz Attack-Main Line |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Nf3 Be7 5 Bf4 0-0 6 e3 c5 7 dxc5 Bxc5 8 Qc2 Nc6 9 a3 Qa5 10 0-0-0 | D37 | Queen's Gambit Declined-Harrwitz Attack-Main Line-New Main Line |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Nf3 Be7 5 Bf4 0-0 6 e3 c5 7 dxc5 Bxc5 8 Qc2 Nc6 9 a3 Qa5 10 Rd1 | D37 | Queen's Gambit Declined-Harrwitz Attack-Main Line-Old Main Line |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Nf3 Be7 5 Bf4 0-0 6 e3 c6 | D37 | Queen's Gambit Declined-3 Knights Variation-Harrwitz Attack-Orthodox Defence |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Nf3 Be7 5 Bf4 0-0 6 e3 Nbd7 | D37 | Queen's Gambit Declined-3 Knights Variation-Harrwitz Attack-2 Knights Defence |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Nf3 Be7 5 Bf4 0-0 6 e3 Nbd7 7 c5 | D37 | Queen's Gambit Declined-Harrwitz Attack-2 Knights Defence-Blockade Line |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Nf3 c5 | D40 | Queen's Gambit Declined-Normal Defence-3 Knights Variation-Semi-Tarrasch Defence |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Nf3 c5 5 Bg5 | D40 | Queen's Gambit Declined-3 Knights Variation-Semi-Tarrasch Defence-Pillsbury Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Nf3 c5 5 cxd5 | D41 | Queen's Gambit Declined-Normal Defence-3 Knights Variation-Semi-Tarrasch Defence |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Nf3 c5 5 cxd5 Nxd5 6 e3 | D41 | Queen's Gambit Declined-3 Knights Variation-Semi-Tarrasch Defence-Pillsbury Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Nf3 c5 5 cxd5 Nxd5 6 e3 Nc6 7 Bd3 | D42 | Queen's Gambit Declined-Semi-Tarrasch Defence-Pillsbury Variation-Main Line |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Nf3 c5 5 cxd5 Nxd5 6 e4 | D41 | Queen's Gambit Declined-3 Knights Variation-Semi-Tarrasch Defence-Exchange Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Nf3 c5 5 cxd5 Nxd5 6 e4 Nxc3 7 bxc3 cxd4 8 cxd4 Bb4+ 9 Bd2 Bxd2+ 10 Qxd2 0-0 11 Bb5 | D41 | Queen's Gambit Declined-Semi-Tarrasch Defence-Exchange Variation-Kmoch Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Nf3 c5 5 cxd5 Nxd5 6 e4 Nxc3 7 bxc3 cxd4 8 cxd4 Bb4+ 9 Bd2 Qa5 | D41 | Queen's Gambit Declined-Semi-Tarrasch Defence-Exchange Variation-San Sebastian Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Nf3 c5 5 e3 Nc6 (6 Bd3 Bd6 7 0-0 0-0) | D40 | Queen's Gambit Declined-3 Knights Variation-Semi-Tarrasch Defence-Symmetrical Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Nf3 c5 5 e3 Nc6 6 Bd3 Bd6 7 0-0 0-0 8 Qe2 Qe7 9 dxc5 Bxc5 10 e4 | D40 | Queen's Gambit Declined-Semi-Tarrasch Defence-Symmetrical Variation-Levenfish Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Nf3 c6 | D43 | Queen's Gambit Declined-Normal Defence-3 Knights Variation-Semi-Slav Defence |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Nf3 c6 5 Bg5 | D43 | Queen's Gambit Declined-3 Knights Variation-Semi-Slav Defence-Anti-Meran System |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Nf3 c6 5 Bg5 dxc4 | D44 | Queen's Gambit Declined-3 Knights Variation-Semi-Slav Defence Accepted-Anti-Meran System |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Nf3 c6 5 Bg5 dxc4 6 e4 | D44 | Queen's Gambit Declined-Semi-Slav Defence Accepted-Anti-Meran System-Botvinnik System |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Nf3 c6 5 Bg5 dxc4 6 e4 b5 7 e5 h6 8 Bh4 g5 9 exf6 gxh4 10 Ne5 | D44 | Queen's Gambit Declined-Anti-Meran System-Botvinnik System-Ekström Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Nf3 c6 5 Bg5 dxc4 6 e4 b5 7 e5 h6 8 Bh4 g5 9 Nxg5 | D44 | Queen's Gambit Declined-Anti-Meran System-Botvinnik System-Anti-Meran Gambit |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Nf3 c6 5 Bg5 dxc4 6 e4 b5 7 e5 h6 8 Bh4 g5 9 Nxg5 hxg5 10 Bxg5 Nbd7 11 g3 | D44 | Queen's Gambit Declined-Anti-Meran System-Anti-Meran Gambit-Lilienthal Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Nf3 c6 5 Bg5 dxc4 6 e4 b5 7 e5 h6 8 Bh4 g5 9 Nxg5 hxg5 10 Bxg5 Nbd7 11 Qf3 | D44 | Queen's Gambit Declined-Anti-Meran System-Anti-Meran Gambit-Szabó Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Nf3 c6 5 Bg5 dxc4 6 e4 b5 7 e5 h6 8 Bh4 g5 9 Nxg5 Nd5 | D44 | Queen's Gambit Declined-Anti-Meran System-Anti-Meran Gambit-Alatortsev System |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Nf3 c6 5 Bg5 h6 6 Bh4 | D44 | Queen's Gambit Declined-Semi-Slav Defence-Anti-Meran System-Anti-Moscow Gambit |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Nf3 c6 5 Bg5 h6 6 Bxf6 Qxf6 7 Qb3 | D43 | Queen's Gambit Declined-Semi-Slav Defence-Anti-Meran System-Hastings Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Nf3 c6 5 e3 | D45 | Queen's Gambit Declined-3 Knights Variation-Semi-Slav Defence-Main Line |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Nf3 c6 5 e3 a6 | D45 | Queen's Gambit Declined-Semi-Slav Defence-Main Line-Accelerated Meran/Alekhine Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Nf3 c6 5 e3 Nbd7 | D45 | Queen's Gambit Declined-Semi-Slav Defence-Main Line-Normal Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Nf3 c6 5 e3 Nbd7 6 Bd3 | D46 | Queen's Gambit Declined-Semi-Slav Defence-Main Line-Normal Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Nf3 c6 5 e3 Nbd7 6 Bd3 Bb4 | D46 | Queen's Gambit Declined-Semi-Slav Defence-Normal Variation-Romih Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Nf3 c6 5 e3 Nbd7 6 Bd3 Bd6 | D46 | Queen's Gambit Declined-Semi-Slav Defence-Normal Variation-Chigorin Defence |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Nf3 c6 5 e3 Nbd7 6 Bd3 Be7 | D46 | Queen's Gambit Declined-Semi-Slav Defence-Normal Variation-Bogoljubov Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Nf3 c6 5 e3 Nbd7 6 Bd3 dxc4 7 Bxc4 | D47 | Queen's Gambit Declined-Semi-Slav Defence-Normal Variation-Semi-Meran Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Nf3 c6 5 e3 Nbd7 6 Bd3 dxc4 7 Bxc4 b5 | D47 | Queen's Gambit Declined-Normal Variation-Semi-Meran Variation-Meran Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Nf3 c6 5 e3 Nbd7 6 Bd3 dxc4 7 Bxc4 b5 8 Bd3 a6 | D48 | Queen's Gambit Declined-Normal Variation-Semi-Meran Variation-Meran Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Nf3 c6 5 e3 Nbd7 6 Bd3 dxc4 7 Bxc4 b5 8 Bd3 a6 9 e4 b4 | D48 | Queen's Gambit Declined-Semi-Meran Variation-Meran Variation-Pirc Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Nf3 c6 5 e3 Nbd7 6 Bd3 dxc4 7 Bxc4 b5 8 Bd3 a6 9 e4 c5 10 d5 | D48 | Queen's Gambit Declined-Semi-Meran Variation-Meran Variation-Reynolds' Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Nf3 c6 5 e3 Nbd7 6 Bd3 dxc4 7 Bxc4 b5 8 Bd3 a6 9 e4 c5 10 e5 | D48 | Queen's Gambit Declined-Semi-Meran Variation-Meran Variation-Classical/Old Main Line |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Nf3 c6 5 e3 Nbd7 6 Bd3 dxc4 7 Bxc4 b5 8 Bd3 a6 9 e4 c5 10 e5 cxd4 11 Nxb5 | D49 | Queen's Gambit Declined-Meran Variation-Old Main Line-Blumenfeld Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Nf3 c6 5 e3 Nbd7 6 Bd3 dxc4 7 Bxc4 b5 8 Bd3 a6 9 e4 c5 10 e5 cxd4 11 Nxb5 Ng4 | D49 | Queen's Gambit Declined-Meran Variation-Blumenfeld Variation-Rabinovich Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Nf3 c6 5 e3 Nbd7 6 Bd3 dxc4 7 Bxc4 b5 8 Bd3 a6 9 e4 c5 10 e5 cxd4 11 Nxb5 Nxe5 | D49 | Queen's Gambit Declined-Meran Variation-Blumenfeld Variation-Sozin Variation II |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Nf3 c6 5 e3 Nbd7 6 Bd3 dxc4 7 Bxc4 b5 8 Bd3 a6 9 e4 c5 10 e5 cxd4 11 Nxb5 Nxe5 12 Nxe5 axb5 13 0-0 | D49 | Queen's Gambit Declined-Blumenfeld Variation-Sozin Variation II-Sozin Variation I |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Nf3 c6 5 e3 Nbd7 6 Bd3 dxc4 7 Bxc4 b5 8 Bd3 a6 9 e4 c5 10 e5 cxd4 11 Nxb5 Nxe5 12 Nxe5 axb5 13 0-0 Qd5 14 Qe2 Ba6 (15 Bg5) | D49 | Queen's Gambit Declined-Sozin Variation II-Sozin Variation I-Rellstab Attack |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Nf3 c6 5 e3 Nbd7 6 Bd3 dxc4 7 Bxc4 b5 8 Bd3 a6 9 e4 c5 10 e5 cxd4 11 Nxb5 Nxe5 12 Nxe5 axb5 13 Qf3 | D49 | Queen's Gambit Declined-Blumenfeld Variation-Sozin Variation II-Ståhlberg Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Nf3 c6 5 e3 Nbd7 6 Bd3 dxc4 7 Bxc4 b5 8 Bd3 b4 | D47 | Queen's Gambit Declined-Semi-Meran Variation-Meran Variation-Neo-Meran/Lundin Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Nf3 c6 5 e3 Nbd7 6 Bd3 dxc4 7 Bxc4 b5 8 Bd3 Bb7 | D47 | Queen's Gambit Declined-Semi-Meran Variation-Meran Variation-Wade Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Nf3 c6 5 e3 Nbd7 6 Bd3 dxc4 7 Bxc4 b5 8 Bd3 Bb7 9 e4 b4 10 Na4 c5 11 e5 Nd5 | D47 | Queen's Gambit Declined-Meran Variation-Wade Variation-Larsen Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Nf3 c6 5 e3 Nbd7 6 Bd3 dxc4 7 Bxc4 b5 8 Bd3 Bb7 9 e4 b4 10 Na4 c5 11 e5 Nd5 12 0-0 cxd4 13 Nxd4 | D47 | Queen's Gambit Declined-Wade Variation-Larsen Variation-Kaidanov Gambit |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Nf3 c6 5 e3 Nbd7 6 cxd5 | D45 | Queen's Gambit Declined-Semi-Slav Defence-Normal Variation-Exchange Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Nf3 c6 5 e3 Nbd7 6 Ne5 | D45 | Queen's Gambit Declined-Semi-Slav Defence-Normal Variation-Rubinstein/Anti-Meran System |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Nf3 c6 5 e3 Nbd7 6 Qc2 | D45 | Queen's Gambit Declined-Semi-Slav Defence-Normal Variation-Stoltz Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Nf3 c6 5 e3 Nbd7 6 Qc2 Bd6 7 e4 | D45 | Queen's Gambit Declined-Normal Variation-Stoltz Variation-Centre Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Nf3 c6 5 e3 Nbd7 6 Qc2 Bd6 7 e4 dxe4 8 Nxe4 Nxe4 9 Qxe4 e5 10 dxe5 | D45 | Queen's Gambit Declined-Stoltz Variation-Centre Variation-Mikhalchishin Line |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Nf3 c6 5 e3 Nbd7 6 Qc2 Bd6 7 g4 | D45 | Queen's Gambit Declined-Normal Variation-Stoltz Variation-Shabalov Attack |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Nf3 c6 5 e3 Ne4 6 Bd3 f5 | D45 | Queen's Gambit Declined-Semi-Slav Defence-Main Line-Stonewall Defence |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Nf3 dxc4 | D44 | Queen's Gambit Declined-Normal Defence-3 Knights Variation-Vienna Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Nf3 dxc4 5 e3 | D44 | Queen's Gambit Declined-3 Knights Variation-Vienna Variation-Quiet Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Nf3 Nbd7 | D37 | Queen's Gambit Declined-Normal Defence-3 Knights Variation-Barmen Variation |
| 1 d4 d5 2 c4 e6 3 Nc3 Nf6 4 Nf3 Nbd7 5 cxd5 | D37 | Queen's Gambit Declined-3 Knights Variation-Barmen Variation-Exchange Variation Deferred |
| 1 d4 d5 2 c4 e6 3 Nf3 c5 | D30 Explore | Queen's Pawn-Queen's Gambit Declined-Tarrasch Defence-Pseudo-Tarrasch Variation |
| 1 d4 d5 2 c4 e6 3 Nf3 c5 4 cxd5 exd5 5 Bg5 | D30 Explore | Queen's Gambit Declined-Tarrasch Defence-Pseudo-Tarrasch Variation-Bishop Attack |
| 1 d4 d5 2 c4 e6 3 Nf3 c6 4 Nc3 dxc4 5 g3 | D31 | Queen's Pawn-Queen's Gambit Declined-Anti-Noteboom Gambit |
| 1 d4 d5 2 c4 e6 3 Nf3 Nf6 4 Bg5 | D30 | Queen's Pawn-Queen's Gambit Declined-Traditional Variation |
| 1 d4 d5 2 c4 e6 3 Nf3 Nf6 4 Bg5 Bb4+ | D30 | Queen's Pawn-Queen's Gambit Declined-Traditional Variation-Vienna Variation |
| 1 d4 d5 2 c4 e6 3 Nf3 Nf6 4 Bg5 h6 | D30 | Queen's Pawn-Queen's Gambit Declined-Traditional Variation-Capablanca-Duras Variation |
| 1 d4 d5 2 c4 e6 3 Nf3 Nf6 4 Bg5 h6 5 Bxf6 Qxf6 6 Nc3 c6 7 Qb3 | D30 | Queen's Gambit Declined-Traditional Variation-Capablanca-Duras Variation-Hastings Variation |
| 1 d4 d5 2 c4 e6 3 Nf3 Nf6 4 Bg5 Nbd7 5 e3 c6 6 Nbd2 | D30 | Queen's Pawn-Queen's Gambit Declined-Traditional Variation-Capablanca Variation |
| 1 d4 d5 2 c4 e6 3 Nf3 Nf6 4 e3 c6 5 Nbd2 | D30 | Queen's Pawn-Queen's Gambit Declined-Slav/Quiet Variation |
| 1 d4 d5 2 c4 e6 3 Nf3 Nf6 4 e3 c6 5 Nbd2 g6 | D30 | Queen's Pawn-Queen's Gambit Declined-Slav Variation-Spielmann Variation |
| 1 d4 d5 2 c4 e6 3 Nf3 Nf6 4 e3 c6 5 Nbd2 Nbd7 6 Bd3 | D30 | Queen's Pawn-Queen's Gambit Declined-Slav Variation-Breyer Variation |
| 1 d4 d5 2 c4 e6 3 Nf3 Nf6 4 e3 c6 5 Nbd2 Nbd7 6 Bd3 c5 | D30 | Queen's Gambit Declined-Slav Variation-Breyer Variation-Semmering Variation |
| 1 d4 d5 2 c4 e6 3 Nf3 Nf6 4 e3 c6 5 Nbd2 Ne4 6 Bd3 f5 | D30 | Queen's Pawn-Queen's Gambit Declined-Slav Variation-Stonewall Variation |
| 1 d4 d5 2 c4 g6 | D06 Explore | Queen's Pawn-Queen's Gambit Declined-Alekhine Variation |
| 1 d4 d5 2 c4 Nc6 | D07 Explore | Queen's Pawn-Queen's Gambit Declined-Chigorin's Defence |
| 1 d4 d5 2 c4 Nc6 3 cxd5 Qxd5 | D07 | Queen's Pawn-Queen's Gambit Declined-Chigorin Defence-Exchange Variation |
| 1 d4 d5 2 c4 Nc6 3 cxd5 Qxd5 4 e3 e5 5 Nc3 Bb4 6 Bd2 Bxc3 7 Bxc3 exd4 8 Ne2 | D07 | Queen's Gambit Declined-Chigorin Defence-Exchange Variation-Costa's Line |
| 1 d4 d5 2 c4 Nc6 3 Nc3 dxc4 4 Nf3 | D07 | Queen's Pawn-Queen's Gambit Declined-Chigorin Defence-Janowski Variation |
| 1 d4 d5 2 c4 Nc6 3 Nc3 e5 | D07 | Queen's Pawn-Queen's Gambit Declined-Chigorin Defence-Tartakower Gambit |
| 1 d4 d5 2 c4 Nc6 3 Nc3 Nf6 4 Nf3 dxc4 | D07 | Queen's Pawn-Queen's Gambit Declined-Chigorin Defence-Modern Gambit |
| 1 d4 d5 2 c4 Nc6 3 Nf3 Bg4 | D07 | Queen's Pawn-Queen's Gambit Declined-Chigorin Defence-Main Line |
| 1 d4 d5 2 c4 Nc6 3 Nf3 Bg4 4 Qa4 | D07 | Queen's Gambit Declined-Chigorin Defence-Main Line-Alekhine Variation |
| 1 d4 d5 2 c4 Nc6 3 Nf3 e5 | D07 | Queen's Pawn-Queen's Gambit Declined-Chigorin Defence-Lazard Gambit |
| 1 d4 d5 2 c4 Nf6 | D06 Explore | Queen's Pawn-Queen's Gambit Declined-Marshall Defence |
| 1 d4 d5 2 c4 Nf6 3 cxd5 c6 | D06 | Queen's Pawn-Queen's Gambit Declined-Marshall Defence-Tan Gambit |
| 1 d4 d5 2 e3 c6 3 Bd3 | D00 | Queen's Pawn-Stonewall Attack-Zukertort Variation |
| 1 d4 d5 2 e3 e6 3 Bd3 | D00 | Queen's Pawn-Stonewall Attack-Showalter Variation |
| 1 d4 d5 2 e3 e6 3 Bd3 c5 | D00 | Queen's Pawn-Stonewall Attack-Showalter Variation-Gunsberg Variation |
| 1 d4 d5 2 e3 Nf6 3 Bd3 | D00 | Queen's Pawn-Stonewall Attack-Pillsbury Variation |
| 1 d4 d5 2 e4 | D00 Explore | Queen's Pawn-Blackmar Diemer Gambit |
| 1 d4 d5 2 e4 dxe4 3 Bc4 | D00 | Queen's Pawn-Blackmar Diemer Gambit-Fritz Attack |
| 1 d4 d5 2 e4 dxe4 3 Be3 | D00 | Queen's Pawn-Blackmar Diemer Gambit-Diemer-Rosenberg Attack |
| 1 d4 d5 2 e4 dxe4 3 f3 | D00 | Queen's Pawn-Blackmar Diemer Gambit-Gedult Gambit |
| 1 d4 d5 2 e4 dxe4 3 f3 exf3 4 Nxf3 | D00 | Queen's Pawn-Blackmar Diemer Gambit-Blackmar Gambit #1 |
| 1 d4 d5 2 e4 dxe4 3 Nc3 Bd7 | D00 | Queen's Pawn-Blackmar Diemer Gambit Declined-Gedult Gambit-Grosshans Defence |
| 1 d4 d5 2 e4 dxe4 3 Nc3 Bf5 | D00 | Queen's Pawn-Blackmar Diemer Gambit-Zeller Defence |
| 1 d4 d5 2 e4 dxe4 3 Nc3 Bf5 4 f3 Nf6 5 Bc4 | D00 | Queen's Pawn-Blackmar Diemer Gambit-Zeller Defence-Soller Attack |
| 1 d4 d5 2 e4 dxe4 3 Nc3 e5 | D00 | Queen's Pawn-Blackmar Diemer Gambit-Lemberger Countergambit |
| 1 d4 d5 2 e4 dxe4 3 Nc3 e5 4 Be3 | D00 | Queen's Pawn-Blackmar Diemer Gambit-Lemberger Countergambit-Diemer Attack |
| 1 d4 d5 2 e4 dxe4 3 Nc3 e5 4 dxe5 | D00 | Queen's Pawn-Blackmar Diemer Gambit-Lemberger Countergambit-Endgame Variation |
| 1 d4 d5 2 e4 dxe4 3 Nc3 e5 4 Nge2 | D00 | Queen's Pawn-Blackmar Diemer Gambit-Lemberger Countergambit-Rassmussen Attack |
| 1 d4 d5 2 e4 dxe4 3 Nc3 e5 4 Nxe4 | D00 | Queen's Pawn-Blackmar Diemer Gambit-Lemberger Countergambit-Simple Variation |
| 1 d4 d5 2 e4 dxe4 3 Nc3 e5 4 Qh5 | D00 | Queen's Pawn-Blackmar Diemer Gambit-Lemberger Countergambit-Sneiders Attack |
| 1 d4 d5 2 e4 dxe4 3 Nc3 f5 | D00 | Queen's Pawn-Blackmar Diemer Gambit-Netherlands Variation |
| 1 d4 d5 2 e4 dxe4 3 Nc3 Nf6 4 Be3 | D00 | Queen's Pawn-Blackmar Diemer Gambit-Studier-Rasa Gambit |
| 1 d4 d5 2 e4 dxe4 3 Nc3 Nf6 4 Bg5 | D00 | Queen's Pawn-Blackmar Diemer Gambit-Von Popiel Gambit |
| 1 d4 d5 2 e4 dxe4 3 Nc3 Nf6 4 Bg5 Bf5 5 Bxf6 exf6 6 g4 Bg6 7 Qe2 Bb4 8 Qb5+ | D00 | Queen's Pawn-Blackmar Diemer Gambit-Von Popiel Gambit-Zilbermints Variation |
| 1 d4 d5 2 e4 dxe4 3 Nc3 Nf6 4 f3 Bf5 | D00 | Queen's Pawn-Blackmar Diemer Gambit-Vienna Variation |
| 1 d4 d5 2 e4 dxe4 3 Nc3 Nf6 4 f3 c5 | D00 | Queen's Pawn-Blackmar Diemer Gambit Declined-Brombacher Countergambit |
| 1 d4 d5 2 e4 dxe4 3 Nc3 Nf6 4 f3 c6 | D00 | Queen's Pawn-Blackmar Diemer Gambit Declined-O'Kelly Defence |
| 1 d4 d5 2 e4 dxe4 3 Nc3 Nf6 4 f3 e3 | D00 | Queen's Pawn-Blackmar Diemer Gambit Declined-Langeheinecke Defence |
| 1 d4 d5 2 e4 dxe4 3 Nc3 Nf6 4 f3 e5 | D00 | Queen's Pawn-Blackmar Diemer Gambit Declined-Elbert Countergambit |
| 1 d4 d5 2 e4 dxe4 3 Nc3 Nf6 4 f3 e6 | D00 | Queen's Pawn-Blackmar Diemer Gambit Declined-Weinsbach Declination |
| 1 d4 d5 2 e4 dxe4 3 Nc3 Nf6 4 f3 exf3 5 Nxf3 b6 | D00 | Queen's Pawn-Blackmar Diemer Gambit-Ritter Defence |
| 1 d4 d5 2 e4 dxe4 3 Nc3 Nf6 4 f3 exf3 5 Nxf3 Bf5 | D00 | Queen's Pawn-Blackmar Diemer Gambit-Tartakower Variation |
| 1 d4 d5 2 e4 dxe4 3 Nc3 Nf6 4 f3 exf3 5 Nxf3 Bg4 | D00 | Queen's Pawn-Blackmar Diemer Gambit-Teichmann Variation |
| 1 d4 d5 2 e4 dxe4 3 Nc3 Nf6 4 f3 exf3 5 Nxf3 c5 | D00 | Queen's Pawn-Blackmar Diemer Gambit-Kaulich Defence |
| 1 d4 d5 2 e4 dxe4 3 Nc3 Nf6 4 f3 exf3 5 Nxf3 c6 | D00 | Queen's Pawn-Blackmar Diemer Gambit-Ziegler Defence |
| 1 d4 d5 2 e4 dxe4 3 Nc3 Nf6 4 f3 exf3 5 Nxf3 e6 | D00 | Queen's Pawn-Blackmar Diemer Gambit-Euwe Defence |
| 1 d4 d5 2 e4 dxe4 3 Nc3 Nf6 4 f3 exf3 5 Nxf3 e6 6 Bg5 Be7 7 Bd3 Nc6 8 0-0 Nxd4 9 Kh1 | D00 | Queen's Pawn-Blackmar Diemer Gambit-Euwe Defence-Zilbermints Gambit |
| 1 d4 d5 2 e4 dxe4 3 Nc3 Nf6 4 f3 exf3 5 Nxf3 g6 | D00 | Queen's Pawn-Blackmar Diemer Gambit-Bogoljubov Defence |
| 1 d4 d5 2 e4 dxe4 3 Nc3 Nf6 4 f3 exf3 5 Nxf3 g6 6 Bc4 Bg7 7 0-0 0-0 8 Kh1 | D00 | Queen's Pawn-Blackmar Diemer Gambit-Bogoljubov Defence-Kloss Attack |
| 1 d4 d5 2 e4 dxe4 3 Nc3 Nf6 4 f3 exf3 5 Nxf3 g6 6 Bc4 Bg7 7 0-0 0-0 8 Qe1 | D00 | Queen's Pawn-Blackmar Diemer Gambit-Bogoljubov Defence-Studier Attack |
| 1 d4 d5 2 e4 dxe4 3 Nc3 Nf6 4 f3 exf3 5 Nxf3 g6 6 Bc4 Bg7 7 h4 | D00 | Queen's Pawn-Blackmar Diemer Gambit-Bogoljubov Defence-Mad Dog Attack |
| 1 d4 d5 2 e4 dxe4 3 Nc3 Nf6 4 f3 exf3 5 Nxf3 g6 6 Bc4 Bg7 7 Ne5 | D00 | Queen's Pawn-Blackmar Diemer Gambit-Bogoljubov Defence-Nimzowitsch Attack |
| 1 d4 d5 2 e4 dxe4 3 Nc3 Nf6 4 f3 exf3 5 Nxf3 h5 | D00 | Queen's Pawn-Blackmar Diemer Gambit-Rook Pawn Defence |
| 1 d4 d5 2 e4 dxe4 3 Nc3 Nf6 4 f3 exf3 5 Nxf3 Nbd7 | D00 | Queen's Pawn-Blackmar Diemer Gambit-Schlutter Defence |
| 1 d4 d5 2 e4 dxe4 3 Nc3 Nf6 4 f3 exf3 5 Nxf3 Nc6 | D00 | Queen's Pawn-Blackmar Diemer Gambit-Pietrowsky Defence |
| 1 d4 d5 2 e4 dxe4 3 Nc3 Nf6 4 f3 exf3 5 Qxf3 | D00 | Queen's Pawn-Blackmar Diemer Gambit-Ryder Gambit |
| 1 d4 d5 2 e4 dxe4 3 Nc3 Nf6 4 f3 exf3 5 Qxf3 Qxd4 6 Be3 Qb4 7 0-0-0 Bg4 8 Nb5 | D00 | Queen's Pawn-Blackmar Diemer Gambit-Ryder Gambit-Halosar Trap |
| 1 d4 d5 2 e4 dxe4 3 Nc3 Nf6 4 f3 Nc6 | D00 | Queen's Pawn-Blackmar Diemer Gambit Declined-Lamb Defence |
| 1 d4 d5 2 f4 | D00 Explore | Queen's Pawn-Mason's Attack |
| 1 d4 d5 2 g3 | D00 Explore | Queen's Pawn-Czyzewski Variation |
| 1 d4 d5 2 g4 | D00 Explore | Queen's Pawn-Zurich Gambit |
| 1 d4 d5 2 Nc3 | D00 Explore | Queen's Pawn-Chigorin/Veresov Attack |
| 1 d4 d5 2 Nc3 b6 3 a4 Nd7 | D00 | Queen's Pawn-Chigorin Attack-Cologne Variation |
| 1 d4 d5 2 Nc3 Bf5 | D00 | Queen's Pawn-Chigorin Attack-Alburt Defence |
| 1 d4 d5 2 Nc3 Bg4 | D00 | Queen's Pawn-Chigorin Attack-Anti-Veresov Variation |
| 1 d4 d5 2 Nc3 c5 | D00 | Queen's Pawn-Chigorin Attack-Irish Gambit |
| 1 d4 d5 2 Nc3 e5 | D00 | Queen's Pawn-Chigorin Attack-Shaviliuk Gambit |
| 1 d4 d5 2 Nc3 f5 | A80 | Queen's Pawn-Chigorin Attack-Dutch System |
| 1 d4 d5 2 Nc3 g6 3 Nf3 Bg7 | D00 | Queen's Pawn-Chigorin Attack-Fianchetto Defence |
| 1 d4 d5 2 Nc3 h5 | D00 | Queen's Pawn-Chigorin Attack-Shropshire Defence |
| 1 d4 d5 2 Nc3 Nf6 3 Bg5 | D01 | Queen's Pawn-Chigorin Attack-Richter-Veresov Attack |
| 1 d4 d5 2 Nc3 Nf6 3 Bg5 Bf5 4 Bxf6 | D01 | Queen's Pawn-Chigorin Attack-Richter-Veresov Attack-Veresov Variation |
| 1 d4 d5 2 Nc3 Nf6 3 Bg5 Bf5 4 f3 | D01 | Queen's Pawn-Chigorin Attack-Richter-Veresov Attack-Richter Variation |
| 1 d4 d5 2 Nc3 Nf6 3 Bg5 e6 4 Nf3 | D01 | Queen's Pawn-Chigorin Attack-Richter-Veresov Attack-Classical Defence |
| 1 d4 d5 2 Nc3 Nf6 3 Bg5 Nbd7 4 Nf3 | D01 | Queen's Pawn-Chigorin Attack-Richter-Veresov Attack-2 Knights System |
| 1 d4 d5 2 Nc3 Nf6 3 Bg5 Nbd7 4 Nf3 g6 | D01 | Queen's Pawn-Richter-Veresov Attack-2 Knights System-Gruenfeld Defence |
| 1 d4 d5 2 Nc3 Nf6 3 Bg5 Ne4 | D01 | Queen's Pawn-Chigorin Attack-Richter-Veresov Attack-Boyce Defence |
| 1 d4 d5 2 Nc3 Nf6 3 e4 | D00 | Queen's Pawn-Chigorin Attack-Blackmar-Diemer Gambit |
| 1 d4 d5 2 Nc3 Nf6 3 e4 dxe4 4 Bg5 | D00 | Queen's Pawn-Chigorin Attack-Blackmar-Diemer Gambit-Popiel Variation |
| 1 d4 d5 2 Nc3 Nf6 3 e4 dxe4 4 f3 Bf5 | D00 | Queen's Pawn-Chigorin Attack-Blackmar-Diemer Gambit-Vienna Variation |
| 1 d4 d5 2 Nc3 Nf6 3 e4 dxe4 4 f3 exf3 5 Nxf3 Bg4 | D00 | Queen's Pawn-Chigorin Attack-Blackmar-Diemer Gambit-Teichmann Variation |
| 1 d4 d5 2 Nc3 Nf6 3 e4 dxe4 4 f3 exf3 5 Nxf3 c6 | D00 | Queen's Pawn-Chigorin Attack-Blackmar-Diemer Gambit-O'Kelly Variation |
| 1 d4 d5 2 Nc3 Nf6 3 e4 dxe4 4 f3 exf3 5 Nxf3 e6 | D00 | Queen's Pawn-Chigorin Attack-Blackmar-Diemer Gambit-Euwe Defence |
| 1 d4 d5 2 Nc3 Nf6 3 e4 dxe4 4 f3 exf3 5 Nxf3 g6 | D00 | Queen's Pawn-Chigorin Attack-Blackmar-Diemer Gambit-Bogolubov Variation |
| 1 d4 d5 2 Nc3 Nf6 3 e4 dxe4 4 f3 exf3 5 Nxf3 g6 6 Bc4 Bg7 7 0-0 0-0 8 Qe1 | D00 | Queen's Pawn-Blackmar-Diemer Gambit-Bogolubov Variation-Studier Variation |
| 1 d4 d5 2 Nc3 Nf6 3 e4 dxe4 4 f3 exf3 5 Qxf3 | D00 | Queen's Pawn-Chigorin Attack-Blackmar-Diemer Gambit-Ryder Variation |
| 1 d4 d5 2 Nc3 Nf6 3 e4 e5 | D00 | Queen's Pawn-Chigorin Attack-Blackmar-Diemer Gambit-Lemberg Countergambit |
| 1 d4 d5 2 Nc3 Nf6 3 e4 Nxe4 | D00 | Queen's Pawn-Chigorin Attack-Blackmar-Diemer Gambit-Hübsch Variation |
| 1 d4 d5 2 Nc3 Nf6 3 f3 | D00 | Queen's Pawn-Chigorin Attack-Richter Attack |
| 1 d4 d5 2 Nf3 | D02 Explore | Queen's Pawn-Grunfeld Reversed/Zukertort Variation |
| 1 d4 d5 2 Nf3 Bg4 | D02 Explore | Queen's Pawn-Grunfeld Reversed-Anti-Torre Variation |
| 1 d4 d5 2 Nf3 c5 | D02 Explore | Queen's Pawn-Grunfeld Reversed-Krause/Reversed Queen's Gambit |
| 1 d4 d5 2 Nf3 c5 3 g3 cxd4 4 Bg2 | D02 | Queen's Pawn-Grunfeld Reversed-Krause Gambit-Chandler Gambit |
| 1 d4 d5 2 Nf3 c6 3 c4 e6 4 Nc3 dxc4 5 g3 | D31 | Queen's Pawn-Grunfeld Reversed-Anti-Noteboom Gambit |
| 1 d4 d5 2 Nf3 Nc6 | D02 Explore | Queen's Pawn-Grunfeld Reversed-Chigorin Variation |
| 1 d4 d5 2 Nf3 Nf6 | D02 Explore | Queen's Pawn-Grunfeld Reversed-Symmetrical Variation |
| 1 d4 d5 2 Nf3 Nf6 3 Bf4 | D02 | Queen's Pawn-Grunfeld Reversed-Symmetrical Variation-Queen's Bishop Game/London System |
| 1 d4 d5 2 Nf3 Nf6 3 Bf4 c5 4 e3 Qb6 5 Nc3 | D02 | Queen's Pawn-Symmetrical Variation-Queen's Bishop Game-Poisoned Pawn Variation |
| 1 d4 d5 2 Nf3 Nf6 3 Bg5 | D03 | Queen's Pawn-Grunfeld Reversed-Symmetrical Variation-Torre/Tartakower Attack |
| 1 d4 d5 2 Nf3 Nf6 3 Bg5 e6 4 e3 c5 5 c3 Qb6 | D03 | Queen's Pawn-Symmetrical Variation-Torre Attack-Breyer Variation |
| 1 d4 d5 2 Nf3 Nf6 3 Bg5 g6 | D03 | Queen's Pawn-Symmetrical Variation-Torre Attack-Gruenfeld Variation |
| 1 d4 d5 2 Nf3 Nf6 3 Bg5 g6 4 e3 Bg7 5 Nbd2 0-0 | D03 | Queen's Pawn-Torre Attack-Gruenfeld Variation-Main Line |
| 1 d4 d5 2 Nf3 Nf6 3 Bg5 Ne4 | D03 | Queen's Pawn-Symmetrical Variation-Torre Attack-Gossip Variation |
| 1 d4 d5 2 Nf3 Nf6 3 c4 b5 | D02 | Queen's Pawn-Grunfeld Reversed-Symmetrical Variation-Zilbermints Countergambit |
| 1 d4 d5 2 Nf3 Nf6 3 c4 dxc4 | D25 | Queen's Pawn-Grunfeld Reversed-Symmetrical Variation-Queen's Gambit Accepted Deferred |
| 1 d4 d5 2 Nf3 Nf6 3 e3 (e6 4 Bd3 c5 5 c3) | D04 | Queen's Pawn-Grunfeld Reversed-Symmetrical Variation-Colle/Closed System |
| 1 d4 d5 2 Nf3 Nf6 3 e3 Bf5 | D04 | Queen's Pawn-Symmetrical Variation-Colle System-Anti-Colle Variation |
| 1 d4 d5 2 Nf3 Nf6 3 e3 Bf5 4 Bd3 e6 | D04 | Queen's Pawn-Colle System-Anti-Colle Variation-Alekhine Variation |
| 1 d4 d5 2 Nf3 Nf6 3 e3 c5 4 c3 | D04 | Grunfeld Reversed-Symmetrical Variation-Colle System-Semi-Colle Variation |
| 1 d4 d5 2 Nf3 Nf6 3 e3 e6 | D05 | Queen's Pawn-Grunfeld Reversed-Symmetrical Variation-Colle System |
| 1 d4 d5 2 Nf3 Nf6 3 e3 e6 4 Bd3 | D05 | Grunfeld Reversed-Symmetrical Variation-Colle System-Zukertort Variation |
| 1 d4 d5 2 Nf3 Nf6 3 e3 e6 4 Bd3 c5 5 b3 | D05 | Symmetrical Variation-Colle System-Zukertort Variation-Rubinstein/Colle-Zukertort Opening |
| 1 d4 d5 2 Nf3 Nf6 3 e3 e6 4 Bd3 c5 5 b3 Nc6 6 Bb2 Bd6 7 0-0 0-0 | D05 | Colle System-Zukertort Variation-Rubinstein Opening-Bogoljubov Defence |
| 1 d4 d5 2 Nf3 Nf6 3 e3 e6 4 Bd3 c5 5 b3 Nc6 6 Bb2 Be7 7 0-0 0-0 | D05 | Colle System-Zukertort Variation-Rubinstein Opening-Classical Defence |
| 1 d4 d5 2 Nf3 Nf6 3 e3 e6 4 Bd3 c5 5 c3 | D05 | Grunfeld Reversed-Colle System-Zukertort Variation-Traditional Colle Variation |
| 1 d4 d5 2 Nf3 Nf6 3 e3 e6 4 Bd3 Nbd7 5 0-0 Bd6 6 b3 0-0 7 Bb2 | D05 | Colle System-Zukertort Variation-Rubinstein Opening-Semi-Slav Defence |
| 1 d4 d5 2 Nf3 Nf6 3 e3 e6 4 Nbd2 c5 5 b3 | D05 | Queen's Pawn-Symmetrical Variation-Colle System-Zukertort Variation |
| 1 d4 d5 2 Nf3 Nf6 3 g3 | D02 | Queen's Pawn-Grunfeld Reversed-Symmetrical Variation-Pseudo-Catalan Variation |
| 1 d4 d5 2 Qd3 | D00 Explore | Queen's Pawn-Amazon Attack |
| 1 d4 d5 2 Qd3 Nf6 3 Nc3 | D00 | Queen's Pawn-Amazon Attack-Siberian Attack |
| 1 d4 d6 | A41 Explore | Queen's Pawn-Rat/Modern Defence |
| 1 d4 d6 2 c4 | A41 Explore | Queen's Pawn-Rat Defence-Old Indian Defence |
| 1 d4 d6 2 c4 c6 | A41 | Queen's Pawn-Rat Defence-Old Indian Defence-Anglo-Slav Variation |
| 1 d4 d6 2 c4 e5 | A41 | Queen's Pawn-Rat Defence-Old Indian Defence-English Rat Defence |
| 1 d4 d6 2 c4 e5 3 dxe5 Be6 | A41 | Rat Defence-Old Indian Defence-English Rat Defence,Pounds Gambit |
| 1 d4 d6 2 c4 e5 3 dxe5 Nc6 | A41 | Rat Defence-Old Indian Defence-English Rat Defence-Lisbon Gambit |
| 1 d4 d6 2 c4 g6 3 Nc3 Bg7 | A41 | Queen's Pawn-Rat Defence-Old Indian Defence-Modern Defence |
| 1 d4 d6 2 c4 g6 3 Nc3 Bg7 4 e4 | A42 | Rat Defence-Modern Defence-Averbakh System |
| 1 d4 d6 2 c4 g6 3 Nc3 Bg7 4 e4 c5 5 Nf3 Qa5 | A42 | Rat Defence-Modern Defence-Averbakh System-Pterodactyl Defence |
| 1 d4 d6 2 c4 g6 3 Nc3 Bg7 4 e4 f5 | A42 | Rat Defence-Modern Defence-Averbakh System-Randspringer Variation |
| 1 d4 d6 2 c4 g6 3 Nc3 Bg7 4 e4 Nc6 | A42 | Rat Defence-Modern Defence-Averbakh System-Kotov Variation |
| 1 d4 d6 2 c4 g6 3 Nf3 Bg7 4 e4 Bg4 | A41 | Queen's Pawn-Rat Defence-Old Indian Defence-Rossilimo Variation |
| 1 d4 d6 2 Nf3 Bg4 | A41 | Queen's Pawn-Rat Defence-Tartakower/Wade Defence |
| 1 d4 d6 2 Nf3 Bg4 3 c4 Nd7 4 Qb3 Rb8 | A41 | Queen's Pawn-Rat Defence-Tartakower Defence-Chigorin Variation |
| 1 d4 e5 | A40 Explore | Queen's Pawn-Charlick Gambit Complex |
| 1 d4 e5 2 d5 | A40 Explore | Queen's Pawn-Charlick Gambit Complex Declined |
| 1 d4 e5 2 d5 Bc5 3 e4 Qh4 | A40 | Queen's Pawn-Charlick Gambit Complex Declined-Diemer Counterattack |
| 1 d4 e5 2 dxe5 d6 | A40 Explore | Queen's Pawn-Charlick Gambit Complex-Hartlaub-Charlick/Blackburne-Hartlaub Gambit |
| 1 d4 e5 2 dxe5 d6 3 Bf4 | A40 | Queen's Pawn-Charlick Gambit Complex-Hartlaub-Charlick Gambit-Hartlaub Variation |
| 1 d4 e5 2 dxe5 f6 | A40 Explore | Queen's Pawn-Charlick Gambit Complex-Soller Gambit |
| 1 d4 e5 2 dxe5 Nc6 | A40 Explore | Queen's Pawn-Charlick Gambit Complex-Englund Variation |
| 1 d4 e5 2 dxe5 Nc6 3 Nf3 Bc5 | A40 | Queen's Pawn-Charlick Gambit Complex-Englund Variation-Felbecker Gambit |
| 1 d4 e5 2 dxe5 Nc6 3 Nf3 f6 | A40 | Queen's Pawn-Charlick Gambit Complex-Englund Variation-Soller Gambit Deferred |
| 1 d4 e5 2 dxe5 Nc6 3 Nf3 h6 | A40 | Queen's Pawn-Charlick Gambit Complex-Englund Variation-Zilbermints Gambit II |
| 1 d4 e5 2 dxe5 Nc6 3 Nf3 Nge7 | A40 | Queen's Pawn-Charlick Gambit Complex-Englund Variation-Zilbermints Gambit |
| 1 d4 e5 2 dxe5 Nc6 3 Nf3 Qe7 4 Qd5 | A40 | Queen's Pawn-Charlick Gambit Complex-Englund Variation-Stockholm Variation |
| 1 d4 e5 2 dxe5 Qh4 | A40 Explore | Queen's Pawn-Charlick Gambit Complex-Mosquito Gambit |
| 1 d4 e5 2 e3 | A40 Explore | Queen's Pawn-Charlick Gambit Complex Declined-Reversed French Variation |
| 1 d4 e5 2 Nf3 | A40 Explore | Queen's Pawn-Charlick Gambit Complex Declined-Reversed Alekhine Variation |
| 1 d4 e5 2 Nf3 e4 | A40 | Queen's Pawn-Charlick Gambit Complex Declined-Reversed Alekhine Variation-Reversed Krebs Variation |
| 1 d4 e5 2 Nf3 e4 3 Ne5 | A40 | Queen's Pawn-Reversed Alekhine Variation-Reversed Krebs Variation-Reversed Mokele Mbembe Variation |
| 1 d4 e5 2 Nf3 e4 3 Ng1 | A40 | Queen's Pawn-Reversed Alekhine Variation-Reversed Krebs Variation-Reversed Brooklyn Variation |
| 1 d4 e6 | A40 Explore | Queen's Pawn-Horwitz/Franco-Indian Defence |
| 1 d4 e6 2 Bf4 f5 3 g4 | A80 | Queen's Pawn-Horwitz Defence-Dutch Defence-Senechaud Gambit |
| 1 d4 e6 2 c4 b6 | A40 Explore | Queen's Pawn-Horwitz Defence-Keres/English Defence |
| 1 d4 e6 2 c4 b6 3 e4 Bb7 4 Bd3 Nc6 | A40 | Queen's Pawn-Horwitz Defence-Keres Defence-Perrin Variation |
| 1 d4 e6 2 c4 b6 3 e4 Bb7 4 f3 f5 | A40 | Queen's Pawn-Horwitz Defence-Keres Defence-Poli Variation |
| 1 d4 e6 2 c4 b6 3 e4 Bb7 4 Nc3 f5 5 exf5 Nf6 | A40 | Queen's Pawn-Horwitz Defence-Keres Defence-Hartlaub Variation |
| 1 d4 e6 2 c4 Bb4+ | A40 Explore | Queen's Pawn-Horwitz Defence-Franco-Indian/Kangaroo/Keres Defence |
| 1 d4 e6 2 c4 Bb4+ 3 Nc3 | A40 | Queen's Pawn-Horwitz Defence-Franco-Indian Defence-Transpositional Variation |
| 1 d4 e6 2 c4 c5 3 d5 exd5 4 cxd5 d6 5 Nc3 g6 6 e4 Bg7 7 Nf3 Ne7 | A40 | Queen's Pawn-Horwitz Defence-Benoni Defence-Franco-Sicilian Hybrid |
| 1 d4 e6 2 c4 f5 3 e4 | A84 | Queen's Pawn-Horwitz Defence-Dutch Defence-Bellon Gambit |
| 1 d4 e6 2 e4 c5 | C01 Explore | Queen's Pawn-Horwitz Defence-Franco-Sicilian Defence |
| 1 d4 f5 | A80 Explore | Queen's Pawn-Dutch Defence |
| 1 d4 f5 2 Bf4 e6 3 g4 | A80 | Queen's Pawn-Dutch Defence-Senechaud Variation |
| 1 d4 f5 2 Bg5 | A80 Explore | Queen's Pawn-Dutch Defence-Lebedyev-Barden/Hopton Attack |
| 1 d4 f5 2 c4 | A84 Explore | Queen's Pawn-Dutch Defence |
| 1 d4 f5 2 c4 e6 | A84 | Queen's Pawn-Dutch Defence-Classical Variation |
| 1 d4 f5 2 c4 e6 3 e4 | A84 | Queen's Pawn-Dutch Defence-Classical Variation-Bellon Gambit/Staunton Gambit Deferred |
| 1 d4 f5 2 c4 e6 3 Nc3 | A84 | Queen's Pawn-Dutch Defence-Classical Variation-Rubinstein Variation |
| 1 d4 f5 2 c4 e6 3 Nf3 Nf6 4 g3 c6 5 Bg2 d5 6 0-0 Bd6 | A90 | Dutch Defence-Classical Variation-Stonewall Variation-Modern Variation |
| 1 d4 f5 2 c4 g6 3 Nc3 Nh6 | A84 | Queen's Pawn-Dutch Defence-Bladel Variation |
| 1 d4 f5 2 c4 Nf6 | A84 | Queen's Pawn-Dutch Defence-Normal Variation |
| 1 d4 f5 2 c4 Nf6 3 g3 | A86Explore | Queen's Pawn-Dutch Defence-Normal Variation-Fianchetto Variation |
| 1 d4 f5 2 c4 Nf6 3 g3 d6 4 Bg2 c6 5 Nc3 Qc7 | A86 | Dutch Defence-Normal Variation-Fianchetto Variation-Hort-Antoshin/Hort-Anotshin System |
| 1 d4 f5 2 c4 Nf6 3 g3 e6 4 Bg2 | A90 Explore | Dutch Defence-Normal Variation-Fianchetto Variation-Classical Variation |
| 1 d4 f5 2 c4 Nf6 3 g3 e6 4 Bg2 Bb4+ | A90 | Dutch Defence-Normal Variation-Fianchetto Variation-Dutch-Indian/Nimzo-Dutch/Bogo-Indian Variation |
| 1 d4 f5 2 c4 Nf6 3 g3 e6 4 Bg2 Bb4+ 5 Bd2 Be7 | A90 | Dutch Defence-Fianchetto Variation-Dutch-Indian Variation-Alekhine Variation |
| 1 d4 f5 2 c4 Nf6 3 g3 e6 4 Bg2 Be7 | A91 Explore | Dutch Defence-Normal Variation-Fianchetto Variation-Classical Variation |
| 1 d4 f5 2 c4 Nf6 3 g3 e6 4 Bg2 Be7 5 Nf3 0-0 | A92 Explore | Dutch Defence-Normal Variation-Fianchetto Variation-Classical Variation |
| 1 d4 f5 2 c4 Nf6 3 g3 e6 4 Bg2 Be7 5 Nf3 0-0 6 0-0 d5 | A92 Explore | Dutch Defence-Fianchetto Variation-Classical Variation-Stonewall Variation |
| 1 d4 f5 2 c4 Nf6 3 g3 e6 4 Bg2 Be7 5 Nf3 0-0 6 0-0 d5 7 b3 | A93 | Dutch Defence-Classical Variation-Stonewall Variation-Botvinnik Variation |
| 1 d4 f5 2 c4 Nf6 3 g3 e6 4 Bg2 Be7 5 Nf3 0-0 6 0-0 d5 7 b3 c6 8 Ba3 | A94 | Dutch Defence-Classical Variation-Stonewall Variation-Botvinnik Variation |
| 1 d4 f5 2 c4 Nf6 3 g3 e6 4 Bg2 Be7 5 Nf3 0-0 6 0-0 d5 7 Nc3 c6 | A95 | Dutch Defence-Fianchetto Variation-Classical Variation-Stonewall Variation |
| 1 d4 f5 2 c4 Nf6 3 g3 e6 4 Bg2 Be7 5 Nf3 0-0 6 0-0 d5 7 Nc3 c6 8 Qc2 Qe8 9 Bg5 | A95 | Dutch Defence-Classical Variation-Stonewall Variation-Chekhover Variation |
| 1 d4 f5 2 c4 Nf6 3 g3 e6 4 Bg2 Be7 5 Nf3 0-0 6 0-0 d6 | A96 Explore | Dutch Defence-Normal Variation-Fianchetto Variation-Classical Variation |
| 1 d4 f5 2 c4 Nf6 3 g3 e6 4 Bg2 Be7 5 Nf3 0-0 6 0-0 d6 7 Nc3 a5 | A96 Explore | Dutch Defence-Fianchetto Variation-Classical Variation-Buenos Aires Variation |
| 1 d4 f5 2 c4 Nf6 3 g3 e6 4 Bg2 Be7 5 Nf3 0-0 6 0-0 d6 7 Nc3 Ne4 | A96 Explore | Dutch Defence-Fianchetto Variation-Classical Variation-Huisl Variation |
| 1 d4 f5 2 c4 Nf6 3 g3 e6 4 Bg2 Be7 5 Nf3 0-0 6 0-0 d6 7 Nc3 Qe8 | A97 Explore | Dutch Defence-Fianchetto Variation-Classical Variation-Ilyin-Genevsky Variation |
| 1 d4 f5 2 c4 Nf6 3 g3 e6 4 Bg2 Be7 5 Nf3 0-0 6 0-0 d6 7 Nc3 Qe8 8 b3 | A99 | Dutch Defence-Classical Variation-Ilyin-Genevsky Variation-Modern Main Line |
| 1 d4 f5 2 c4 Nf6 3 g3 e6 4 Bg2 Be7 5 Nf3 0-0 6 0-0 d6 7 Nc3 Qe8 8 Qc2 | A98 | Dutch Defence-Classical Variation-Ilyin-Genevsky Variation-Alatortsev-Lisitsyn Line |
| 1 d4 f5 2 c4 Nf6 3 g3 e6 4 Bg2 Be7 5 Nf3 0-0 6 0-0 d6 7 Nc3 Qe8 8 Re1 | A97 | Dutch Defence-Classical Variation-Ilyin-Genevsky Variation-Winter Variation |
| 1 d4 f5 2 c4 Nf6 3 g3 e6 4 Bg2 Be7 5 Nf3 0-0 6 0-0 Ne4 | A92 | Dutch Defence-Fianchetto Variation-Classical Variation-Alekhine Variation |
| 1 d4 f5 2 c4 Nf6 3 g3 e6 4 Bg2 Be7 5 Nh3 | A91 | Dutch Defence-Fianchetto Variation-Classical Variation-Blackburne Attack |
| 1 d4 f5 2 c4 Nf6 3 g3 e6 4 Bg2 d5 5 Nf3 c6 6 0-0 Bd6 | A97 | Dutch Defence-Fianchetto Variation-Classical Variation-Modern Stonewall Variation |
| 1 d4 f5 2 c4 Nf6 3 g3 g6 | A86 | Dutch Defence-Normal Variation-Fianchetto Variation-Leningrad Variation |
| 1 d4 f5 2 c4 Nf6 3 g3 g6 4 Bg2 Bg7 5 Nf3 | A87 | Dutch Defence-Fianchetto Variation-Leningrad Variation-Main Variation |
| 1 d4 f5 2 c4 Nf6 3 g3 g6 4 Bg2 Bg7 5 Nf3 0-0 6 0-0 d6 7 Nc3 c6 | A88 | Dutch Defence-Leningrad Variation-Main Variation-Warsaw Variation |
| 1 d4 f5 2 c4 Nf6 3 g3 g6 4 Bg2 Bg7 5 Nf3 0-0 6 0-0 d6 7 Nc3 Nc6 | A89 | Dutch Defence-Leningrad Variation-Main Variation-Matulovic Variation |
| 1 d4 f5 2 c4 Nf6 3 g3 g6 4 Bg2 Bg7 5 Nh3 | A86 | Dutch Defence-Fianchetto Variation-Leningrad Variation-Carlsbad Variation |
| 1 d4 f5 2 c4 Nf6 3 Nc3 | A85 | Queen's Pawn-Dutch Defence-Normal Variation-Queen's Knight Variation |
| 1 d4 f5 2 c4 Nf6 3 Nc3 d6 (4 Nf3 Nc6) | A85 | Dutch Defence-Normal Variation-Queen's Knight Variation-Krause Variation |
| 1 d4 f5 2 c4 Nf6 3 Nc3 e6 4 Nf3 d5 5 e3 c6 6 Bd3 Ne4 | A85 | Dutch Defence-Normal Variation-Queen's Knight Variation-Stonewall Variation |
| 1 d4 f5 2 c4 Nf6 3 Nf3 g6 4 g3 | A84 | Queen's Pawn-Dutch Defence-Normal Variation-Russian Variation |
| 1 d4 f5 2 e4 | A82 Explore | Queen's Pawn-Dutch Defence-Staunton Gambit |
| 1 d4 f5 2 e4 c6 | A82 | Queen's Pawn-Dutch Defence-Staunton Gambit-Massachussets Variation |
| 1 d4 f5 2 e4 d6 | A82 | Queen's Pawn-Dutch Defence-Staunton Gambit-Balogh Defence |
| 1 d4 f5 2 e4 fxe4 | A82 | Queen's Pawn-Dutch Defence-Staunton Gambit Accepted |
| 1 d4 f5 2 e4 fxe4 3 f3 exf3 4 Nxf3 Nf6 5 Bd3 | A82 | Queen's Pawn-Dutch Defence-Staunton Gambit Accepted-Blackmar Gambit #2 |
| 1 d4 f5 2 e4 fxe4 3 Nc3 Nf6 4 Bg5 | A83 | Queen's Pawn-Dutch Defence-Staunton Gambit Accepted-Staunton's/General Line |
| 1 d4 f5 2 e4 fxe4 3 Nc3 Nf6 4 Bg5 b6 | A83 | Dutch Defence-Staunton Gambit Accepted-Staunton's Line-Nimzowitsch Variation |
| 1 d4 f5 2 e4 fxe4 3 Nc3 Nf6 4 Bg5 c6 | A83 | Dutch Defence-Staunton Gambit Accepted-Staunton's Line-Chigorin Variation |
| 1 d4 f5 2 e4 fxe4 3 Nc3 Nf6 4 Bg5 g6 5 f3 | A83 | Dutch Defence-Staunton Gambit Accepted-Staunton's Line-Lasker Variation |
| 1 d4 f5 2 e4 fxe4 3 Nc3 Nf6 4 Bg5 g6 5 h4 | A83 | Dutch Defence-Staunton Gambit Accepted-Staunton's Line-Alekhine Variation |
| 1 d4 f5 2 e4 fxe4 3 Nc3 Nf6 4 f3 | A82 | Queen's Pawn-Dutch Defence-Staunton Gambit Accepted-Blackmar's 2nd/Diemer Gambit |
| 1 d4 f5 2 e4 fxe4 3 Nc3 Nf6 4 g4 | A82 | Queen's Pawn-Dutch Defence-Staunton Gambit Accepted-Tartakower Variation |
| 1 d4 f5 2 e4 fxe4 3 Nd2 | A82 | Queen's Pawn-Dutch Defence-Staunton Gambit Accepted-American Attack |
| 1 d4 f5 2 g3 | A81 Explore | Queen's Pawn-Dutch Defence-Fianchetto/Indian Attack |
| 1 d4 f5 2 g3 g6 | A81 | Queen's Pawn-Dutch Defence-Fianchetto Attack-Leningrad Variation |
| 1 d4 f5 2 g3 g6 3 Bg2 Bg7 4 Nf3 c6 5 0-0 Nh6 | A81 | Dutch Defence-Fianchetto Attack-Leningrad Variation-Basman System |
| 1 d4 f5 2 g3 g6 3 Bg2 Bg7 4 Nh3 | A81 | Dutch Defence-Fianchetto Attack-Leningrad Variation-Karlsbad Variation |
| 1 d4 f5 2 g3 Nf6 3 Bg2 e6 4 Nh3 | A81 | Queen's Pawn-Dutch Defence-Fianchetto Attack-Blackburne Variation |
| 1 d4 f5 2 g3 Nf6 3 Bg2 g6 | A81 | Queen's Pawn-Dutch Defence-Fianchetto Attack-Semi-Leningrad Variation |
| 1 d4 f5 2 g4 | A80 Explore | Queen's Pawn-Dutch Defence-Krejcik Gambit |
| 1 d4 f5 2 g4 e5 | A80 | Queen's Pawn-Dutch Defence-Krejcik Gambit-Hevendehl/Hevendahl Gambit |
| 1 d4 f5 2 g4 fxg4 3 e4 d5 4 Nc3 | A80 | Queen's Pawn-Dutch Defence-Krejcik Gambit-Tate Gambit |
| 1 d4 f5 2 h3 | A80 Explore | Queen's Pawn-Dutch Defence-Korchnoi Attack |
| 1 d4 f5 2 h3 Nf6 3 g4 | A80 | Queen's Pawn-Dutch Defence-Korchnoi Attack-Janzen-Korchnoi Gambit |
| 1 d4 f5 2 Nc3 | A80 Explore | Queen's Pawn-Dutch Defence-Raphael Variation |
| 1 d4 f5 2 Nc3 d5 3 e4 | A80 | Queen's Pawn-Dutch Defence-Raphael Variation-Kingfisher Gambit |
| 1 d4 f5 2 Nc3 d5 3 g4 fxg4 4 e4 | A80 | Queen's Pawn-Dutch Defence-Raphael Variation-Tate Variation |
| 1 d4 f5 2 Nc3 Nf6 3 g4 | A80 | Queen's Pawn-Dutch Defence-Raphael Variation-Spielmann Gambit |
| 1 d4 f5 2 Nf3 e5 | A80 | Queen's Pawn-Dutch Defence-Omega-Isis Gambit |
| 1 d4 f5 2 Nf3 e6 3 e4 | A80 | Queen's Pawn-Dutch Defence-Sjodin Variation |
| 1 d4 f5 2 Qd3 | A80 Explore | Queen's Pawn-Dutch Defence-Manhattan/Alapin/Ulvestad/Kmoch Attack |
| 1 d4 f5 2 Qd3 d5 3 g4 | A80 | Queen's Pawn-Dutch Defence-Manhattan Gambit-Anti-Stonewall Variation |
| 1 d4 f5 2 Qd3 d6 3 g4 | A80 | Queen's Pawn-Dutch Defence-Manhattan Gambit-Anti-Modern Variation |
| 1 d4 f5 2 Qd3 e6 3 g4 | A80 | Queen's Pawn-Dutch Defence-Manhattan Gambit-Von Pretzel/Anti-Classical Gambit |
| 1 d4 f5 2 Qd3 g6 3 g4 | A80 | Queen's Pawn-Dutch Defence-Manhattan Gambit-Anti-Leningrad Variation |
| 1 d4 g5 | A40 Explore | Queen's Pawn-Borg Gambit |
| 1 d4 g6 | A40 Explore | Queen's Pawn-Modern/Queen Pawn Fianchetto/Kotov Defence |
| 1 d4 g6 2 c4 Bg7 | A40 | Queen's Pawn-Modern Defence-Robatsch Variation |
| 1 d4 g6 2 c4 Bg7 3 e4 d5 4 exd5 c6 5 dxc6 Bxd4 | A40 | Queen's Pawn-Modern Defence-Robatsch Variation-Dunworthy Variation |
| 1 d4 g6 2 c4 Bg7 3 e4 d6 4 Be3 Nf6 5 f3 | A42 | Queen's Pawn-Modern Defence-Averbakh Variation-Pseudo-Saemisch |
| 1 d4 g6 2 c4 Bg7 3 e4 e5 | A41 | Queen's Pawn-Modern Defence-Robatsch Variation-Neo-Modern Defence |
| 1 d4 g6 2 c4 Bg7 3 Nc3 c5 4 d5 Bxc3+ 5 bxc3 f5 | A40 | Queen's Pawn-Modern Defence-Robatsch Variation-Beefeater Defence |
| 1 d4 g6 2 c4 Bg7 3 Nc3 c5 4 d5 Bxc3+ 5 bxc3 Qa5 | A40 | Modern Defence-Pterodactyl Defence-Fianchetto Variation-Queen Pteronodon Variation |
| 1 d4 g6 2 c4 Bg7 3 Nc3 c5 4 d5 Qa5 | A40 | Modern Defence-Pterodactyl Defence-Fianchetto Variation-Queen Benoni Pterodactyl Variation |
| 1 d4 g6 2 c4 Bg7 3 Nc3 c5 4 e3 | A40 | Modern Defence-Pterodactyl Defence-Queen Pterodactyl Variation-Quiet Variation |
| 1 d4 g6 2 c4 Bg7 3 Nc3 d6 | A41 | Queen's Pawn-Modern Defence-Robatsch Variation |
| 1 d4 g6 2 c4 Bg7 3 Nc3 d6 4 e4 | A42 | Queen's Pawn-Modern Defence-Robatsch Variation-Averbakh System |
| 1 d4 g6 2 c4 Bg7 3 Nc3 d6 4 e4 c5 5 Nf3 Qa5 | A42 | Modern Defence-Robatsch Variation-Averbakh System-Pterodactyl Variation |
| 1 d4 g6 2 c4 Bg7 3 Nc3 d6 4 e4 f5 | A42 | Modern Defence-Robatsch Variation-Averbakh System-Randspringer Variation |
| 1 d4 g6 2 c4 Bg7 3 Nc3 d6 4 e4 Nc6 | A42 | Modern Defence-Robatsch Variation-Averbakh System-Kotov Variation |
| 1 d4 g6 2 h4 Nf6 3 h5 | A40 | Queen's Pawn-Modern Defence-Lizard Defence-Pirc-Diemer Gambit |
| 1 d4 g6 2 Nf3 Bg7 3 Bf4 c5 4 c3 cxd4 5 cxd4 Qa5+ | D02 | Queen's Pawn-Modern Defence-Pterodactyl Variation |
| 1 d4 g6 2 Nf3 Bg7 3 e3 c5 4 Bd3 cxd4 5 Nxd4 Qa5+ | D05 | Queen's Pawn-Modern Defence-Siroccopteryx Variation |
| 1 d4 g6 2 Nf3 Bg7 3 e3 c5 4 Bd3 Qa5+ | D05 | Queen's Pawn-Modern Defence-Pterodactyl Variation |
| 1 d4 g6 2 Nf3 Bg7 3 e3 c5 4 dxc5 Qa5+ | D05 | Queen's Pawn-Modern Defence-Rhamprhynchus Variation |
| 1 d4 g6 2 Nf3 Bg7 3 g3 c5 4 Bg2 Qa5+ | A40 | Modern Defence-Pterodactyl Defence-Fianchetto Variation-Queen Pterodactyl Variation |
| 1 d4 Na6 | A40 Explore | Queen's Pawn-Australian Defence |
| 1 d4 Nc6 | A40 Explore | Queen's Pawn-Lundin/Kevitz-Mikenas(-Bogoljubow-Miles)/Nimzovich Defence |
| 1 d4 Nc6 2 c4 e5 3 d5 Nce7 | A40 | Queen's Pawn-Kevitz-Mikenas Defence-Lithuanian Variation |
| 1 d4 Nc6 2 c4 e5 3 d5 Nd4 | A40 | Queen's Pawn-Kevitz-Mikenas Defence-Cannstatter Variation |
| 1 d4 Nc6 2 c4 e5 3 dxe5 Nxe5 4 Nc3 Nxc4 | A40 | Queen's Pawn-Kevitz-Mikenas Defence-Pozarek Gambit |
| 1 d4 Nc6 2 d5 Nb8 | A40 Explore | Queen's Pawn-Kevitz-Mikenas Defence-Montevideo Defence |
| 1 d4 Nc6 2 d5 Nb8 3 e4 Nf6 4 e5 Ng8 | B02 | Queen's Pawn-Kevitz-Mikenas Defence-Montevideo Defence-Zaire Defence |
| 1 d4 Nc6 2 d5 Ne5 3 e4 e6 4 f4 exd5 5 fxe5 Qh4+ | A40 | Queen's Pawn-Kevitz-Mikenas Defence-Full Metal Jacket |
| 1 d4 Nf6 | A45 Explore | Queen's Pawn-Indian Defence |
| 1 d4 Nf6 2 Bg5 | A45 Explore | Queen's Pawn-Indian Defence-Trompowsky/Ruth/Opovcensky Attack |
| 1 d4 Nf6 2 Bg5 c5 3 d5 Qb6 4 Nc3 | A45 | Queen's Pawn-Indian Defence-Trompowsky Attack-Poisoned Pawn Variation |
| 1 d4 Nf6 2 Bg5 e6 | A45 | Queen's Pawn-Indian Defence-Trompowsky Attack-Classical Defence |
| 1 d4 Nf6 2 Bg5 e6 3 e4 | A45 | Indian Defence-Trompowsky Attack-Classical Defence-Big Centre Variation |
| 1 d4 Nf6 2 Bg5 Ne4 3 Bf4 g5 | A45 | Queen's Pawn-Indian Defence-Trompowsky Attack-Borg Variation |
| 1 d4 Nf6 2 Bg5 Ne4 3 Bh4 | A45 | Queen's Pawn-Indian Defence-Trompowsky Attack-Edge Variation |
| 1 d4 Nf6 2 Bg5 Ne4 3 Bh4 c6 4 Nd2 Qa5 5 c3 Nxd2 6 Qxd2 d5 7 e4 | A45 | Indian Defence-Trompowsky Attack-Edge Variation-Hergert Gambit #2 |
| 1 d4 Nf6 2 Bg5 Ne4 3 Bh4 d5 4 f3 Nf6 5 Nc3 Bf5 6 e4 | A45 | Indian Defence-Trompowsky Attack-Edge Variation-Hergert Gambit #1 |
| 1 d4 Nf6 2 Bg5 Ne4 3 h4 | A45 | Queen's Pawn-Indian Defence-Trompowsky Attack-Raptor Variation |
| 1 d4 Nf6 2 Bg5 Ne4 3 h4 Nxg5 4 hxg5 e5 | A45 | Indian Defence-Trompowsky Attack-Raptor Variation-Hergert Gambit |
| 1 d4 Nf6 2 c4 | A50 Explore | Queen's Pawn-Indian Defence-Normal Variation |
| 1 d4 Nf6 2 c4 b5 | A50 Explore | Queen's Pawn-Indian Defence-Normal Variation-Pyrenees Gambit |
| 1 d4 Nf6 2 c4 b6 | A50 Explore | Queen's Pawn-Indian Defence-Normal Variation-Accelerated/Sämisch-Indian Variation |
| 1 d4 Nf6 2 c4 b6 3 Nc3 | A50 | Indian Defence-Normal Variation-Sämisch-Indian Variation-Marienbad Variation |
| 1 d4 Nf6 2 c4 c5 | A56 Explore | Queen's Pawn-Indian Defence-Normal Variation-Modern Benoni Defence |
| 1 d4 Nf6 2 c4 c5 3 d5 b5 | A57 Explore | Queen's Pawn-Indian Defence-Normal Variation-Benko Gambit |
| 1 d4 Nf6 2 c4 c5 3 d5 b5 4 a4 | A57 | Indian Defence-Normal Variation-Benko Gambit Declined-Sosonko Variation |
| 1 d4 Nf6 2 c4 c5 3 d5 b5 4 Bg5 | A57 | Indian Defence-Normal Variation-Benko Gambit Declined-Bishop Attack |
| 1 d4 Nf6 2 c4 c5 3 d5 b5 4 cxb5 a6 | A57 | Queen's Pawn-Indian Defence-Normal Variation-Benko Gambit half Accepted |
| 1 d4 Nf6 2 c4 c5 3 d5 b5 4 cxb5 a6 5 b6 | A57 | Indian Defence-Normal Variation-Benko Gambit half Accepted-Pawn Return Variation |
| 1 d4 Nf6 2 c4 c5 3 d5 b5 4 cxb5 a6 5 bxa6 | A58 | Queen's Pawn-Indian Defence-Normal Variation-Benko Gambit Fully Accepted |
| 1 d4 Nf6 2 c4 c5 3 d5 b5 4 cxb5 a6 5 bxa6 Bxa6 6 Nc3 d6 7 e4 | A59 | Queen's Pawn-Indian Defence-Normal Variation-Benko Gambit Fully Accepted-Yugoslav Variation |
| 1 d4 Nf6 2 c4 c5 3 d5 b5 4 cxb5 a6 5 bxa6 Bxa6 6 Nc3 d6 7 e4 Bxf1 8 Kxf1 g6 9 g3 Bg7 10 Kg2 0-0 11 Nf3 | A59 | Indian Defence-Benko Gambit Fully Accepted-Yugoslav Variation-King Walk/Main Variation |
| 1 d4 Nf6 2 c4 c5 3 d5 b5 4 cxb5 a6 5 bxa6 Bxa6 6 Nc3 d6 7 Nf3 g6 8 g3 | A58 | Indian Defence-Normal Variation-Benko Gambit Fully Accepted-Fianchetto Variation |
| 1 d4 Nf6 2 c4 c5 3 d5 b5 4 cxb5 a6 5 bxa6 Bxa6 6 Nc3 g6 7 Nf3 d6 8 g3 (Bg7 9 Bg2) | A58 | Indian Defence-Normal Variation-Benko Gambit Fully Accepted-Fianchetto Variation |
| 1 d4 Nf6 2 c4 c5 3 d5 b5 4 cxb5 a6 5 bxa6 g6 6 Nc3 Bxa6 7 f4 | A58 | Indian Defence-Normal Variation-Benko Gambit Fully Accepted-Central Storming Variation |
| 1 d4 Nf6 2 c4 c5 3 d5 b5 4 cxb5 a6 5 e3 | A57 | Indian Defence-Normal Variation-Benko Gambit half Accepted-Modern Variation |
| 1 d4 Nf6 2 c4 c5 3 d5 b5 4 cxb5 a6 5 f3 | A57 | Indian Defence-Normal Variation-Benko Gambit half Accepted-Dlugy Variation |
| 1 d4 Nf6 2 c4 c5 3 d5 b5 4 cxb5 a6 5 Nc3 | A57 | Indian Defence-Normal Variation-Benko Gambit half Accepted-Zaitsev System |
| 1 d4 Nf6 2 c4 c5 3 d5 b5 4 cxb5 a6 5 Nc3 axb5 6 e4 b4 7 Nb5 (d6 8 Bc4) | A57 | Indian Defence-Benko Gambit half Accepted-Zaitsev System-Nescafé Frappe Attack |
| 1 d4 Nf6 2 c4 c5 3 d5 b5 4 e4 | A57 | Indian Defence-Normal Variation-Benko Gambit Declined-Hjoerring Countergambit |
| 1 d4 Nf6 2 c4 c5 3 d5 b5 4 f3 | A57 | Indian Defence-Normal Variation-Benko Gambit Declined-Pseudo-Saemisch Variation |
| 1 d4 Nf6 2 c4 c5 3 d5 b5 4 g4 | A57 | Indian Defence-Normal Variation-Benko Gambit-Mutkin Countergambit |
| 1 d4 Nf6 2 c4 c5 3 d5 b5 4 Nd2 | A57 | Indian Defence-Normal Variation-Benko Gambit Declined-Quiet Line |
| 1 d4 Nf6 2 c4 c5 3 d5 b5 4 Nf3 | A57 | Indian Defence-Normal Variation-Benko Gambit Declined-Main Line |
| 1 d4 Nf6 2 c4 c5 3 d5 d6 | A57 Explore | Indian Defence-Normal Variation-Modern Benoni Defence-Hromádka System |
| 1 d4 Nf6 2 c4 c5 3 d5 e5 | A56 Explore | Indian Defence-Normal Variation-Modern Benoni Defence-Czech Benoni Defence |
| 1 d4 Nf6 2 c4 c5 3 d5 e5 4 Nc3 d6 5 e4 g6 | A56 Explore | Indian Defence-Modern Benoni Defence-Czech Benoni Defence-King's Indian System |
| 1 d4 Nf6 2 c4 c5 3 d5 e6 | A60 Explore | Indian Defence-Normal Variation-Modern Variation-Benoni Defence |
| 1 d4 Nf6 2 c4 c5 3 d5 e6 4 Nc3 exd5 5 cxd5 Bd6 | A60 | Indian Defence-Modern Variation-Benoni Defence-Snake Variation |
| 1 d4 Nf6 2 c4 c5 3 d5 e6 4 Nc3 exd5 5 cxd5 d6 6 e4 | A65 | Indian Defence-Modern Variation-Benoni Defence-King Pawn Lines |
| 1 d4 Nf6 2 c4 c5 3 d5 e6 4 Nc3 exd5 5 cxd5 d6 6 e4 g6 7 f4 | A66 | Indian Defence-Benoni Defence-King Pawn Lines-Pawn Storm Variation |
| 1 d4 Nf6 2 c4 c5 3 d5 e6 4 Nc3 exd5 5 cxd5 d6 6 e4 g6 7 f4 Bg7 8 Bb5+ | A67 | Indian Defence-King Pawn Lines-Pawn Storm Variation-Taimanov Variation |
| 1 d4 Nf6 2 c4 c5 3 d5 e6 4 Nc3 exd5 5 cxd5 d6 6 e4 g6 7 f4 Bg7 8 e5 | A66 | Indian Defence-King Pawn Lines-Pawn Storm Variation-Mikenas Variation |
| 1 d4 Nf6 2 c4 c5 3 d5 e6 4 Nc3 exd5 5 cxd5 d6 6 e4 g6 7 f4 Bg7 8 Nf3 0-0 | A68 | Indian Defence-King Pawn Lines-Pawn Storm Variation-4 Pawns Attack |
| 1 d4 Nf6 2 c4 c5 3 d5 e6 4 Nc3 exd5 5 cxd5 d6 6 e4 g6 7 f4 Bg7 8 Nf3 0-0 9 Be2 Re8 | A69 | Indian Defence-Pawn Storm Variation-4 Pawns Attack-Main Line |
| 1 d4 Nf6 2 c4 c5 3 d5 e6 4 Nc3 exd5 5 cxd5 d6 6 e4 g6 7 Nf3 | A70 | Indian Defence-Benoni Defence-King Pawn Lines-Classical Variation |
| 1 d4 Nf6 2 c4 c5 3 d5 e6 4 Nc3 exd5 5 cxd5 d6 6 e4 g6 7 Nf3 Bg7 8 Be2 (0-0) | A72 | Indian Defence-King Pawn Lines-Classical Variation-Traditional Variation |
| 1 d4 Nf6 2 c4 c5 3 d5 e6 4 Nc3 exd5 5 cxd5 d6 6 e4 g6 7 Nf3 Bg7 8 Be2 0-0 9 0-0 | A73 | Indian Defence-Classical Variation-Traditional Variation-Main Line |
| 1 d4 Nf6 2 c4 c5 3 d5 e6 4 Nc3 exd5 5 cxd5 d6 6 e4 g6 7 Nf3 Bg7 8 Be2 0-0 9 0-0 a6 10 a4 | A74 | Indian Defence-Classical Variation-Traditional Variation-Full Line |
| 1 d4 Nf6 2 c4 c5 3 d5 e6 4 Nc3 exd5 5 cxd5 d6 6 e4 g6 7 Nf3 Bg7 8 Be2 0-0 9 0-0 a6 10 a4 Bg4 | A75 | Indian Defence-Traditional Variation-Full Line-Argentine Counterattack |
| 1 d4 Nf6 2 c4 c5 3 d5 e6 4 Nc3 exd5 5 cxd5 d6 6 e4 g6 7 Nf3 Bg7 8 Be2 0-0 9 0-0 Re8 | A76 | Indian Defence-Traditional Variation-Main Line-Czerniak Defence |
| 1 d4 Nf6 2 c4 c5 3 d5 e6 4 Nc3 exd5 5 cxd5 d6 6 e4 g6 7 Nf3 Bg7 8 Be2 0-0 9 0-0 Re8 10 Nd2 | A77 | Indian Defence-Main Line-Czerniak Defence-Tal Line |
| 1 d4 Nf6 2 c4 c5 3 d5 e6 4 Nc3 exd5 5 cxd5 d6 6 e4 g6 7 Nf3 Bg7 8 Be2 0-0 9 0-0 Re8 10 Nd2 Na6 | A78 | Indian Defence-Main Line-Czerniak Defence-Tal Line |
| 1 d4 Nf6 2 c4 c5 3 d5 e6 4 Nc3 exd5 5 cxd5 d6 6 e4 g6 7 Nf3 Bg7 8 Be2 0-0 9 0-0 Re8 10 Nd2 Na6 11 f3 | A79 | Indian Defence-Main Line-Czerniak Defence-Tal Line |
| 1 d4 Nf6 2 c4 c5 3 d5 e6 4 Nc3 exd5 5 cxd5 d6 6 e4 g6 7 Nf3 Bg7 8 Bg5 | A71 | Indian Defence-King Pawn Lines-Classical Variation-Averbakh-Grivas Attack |
| 1 d4 Nf6 2 c4 c5 3 d5 e6 4 Nc3 exd5 5 cxd5 d6 6 e4 g6 7 Nf3 Bg7 8 h3 | A70 | Indian Defence-King Pawn Lines-Classical Variation-New York Variation |
| 1 d4 Nf6 2 c4 c5 3 d5 e6 4 Nc3 exd5 5 cxd5 d6 6 Nf3 Be7 | A60 | Indian Defence-Normal Variation-Modern Benoni Defence-Kurz Variation |
| 1 d4 Nf6 2 c4 c5 3 d5 e6 4 Nc3 exd5 5 cxd5 d6 6 Nf3 g6 | A61 | Indian Defence-Normal Variation-Modern Benoni Defence (Knight's Tour Variation) |
| 1 d4 Nf6 2 c4 c5 3 d5 e6 4 Nc3 exd5 5 cxd5 d6 6 Nf3 g6 7 Bd2 | A61 | Indian Defence-Normal Variation-Modern Benoni Defence-Penrose Variation |
| 1 d4 Nf6 2 c4 c5 3 d5 e6 4 Nc3 exd5 5 cxd5 d6 6 Nf3 g6 7 Bg5 | A61 | Indian Defence-Normal Variation-Modern Benoni Defence-Uhlmann Variation |
| 1 d4 Nf6 2 c4 c5 3 d5 e6 4 Nc3 exd5 5 cxd5 d6 6 Nf3 g6 7 g3 | A61 | Indian Defence-Normal Variation-Modern Benoni Defence-Fianchetto Variation |
| 1 d4 Nf6 2 c4 c5 3 d5 e6 4 Nc3 exd5 5 cxd5 d6 6 Nf3 g6 7 g3 Bg7 (8 Bg2 0-0) | A62 | Indian Defence-Normal Variation-Modern Benoni Defence-Fianchetto Variation |
| 1 d4 Nf6 2 c4 c5 3 d5 e6 4 Nc3 exd5 5 cxd5 d6 6 Nf3 g6 7 g3 Bg7 8 Bg2 0-0 9 0-0 a6 10 a4 Nbd7 | A63 | Indian Defence-Modern Benoni Defence-Fianchetto Variation-Hastings Defence |
| 1 d4 Nf6 2 c4 c5 3 d5 e6 4 Nc3 exd5 5 cxd5 d6 6 Nf3 g6 7 g3 Bg7 8 Bg2 0-0 9 0-0 a6 10 a4 Nbd7 11 Nd2 Re8 | A64 | Indian Defence-Modern Benoni Defence-Fianchetto Variation-Hastings Defence |
| 1 d4 Nf6 2 c4 c5 3 d5 e6 4 Nc3 exd5 5 cxd5 d6 6 Nf3 g6 7 g3 Bg7 8 Bg2 0-0 9 0-0 Nbd7 | A63 | Indian Defence-Modern Benoni Defence-Fianchetto Variation-Hastings Defence |
| 1 d4 Nf6 2 c4 c5 3 d5 e6 4 Nc3 exd5 5 cxd5 d6 6 Nf3 g6 7 g3 Bg7 8 Bg2 0-0 9 0-0 Nbd7 10 Nd2 a6 11 a4 Re8 | A64 | Indian Defence-Fianchetto Variation-Hastings Defence-Main Line |
| 1 d4 Nf6 2 c4 c5 3 d5 e6 4 Nc3 exd5 5 cxd5 d6 6 Nf3 g6 7 Nd2 | A61 | Indian Defence-Normal Variation-Modern Benoni Defence-Nimzowitsch/Knight's Tour/Nimzovich Variation |
| 1 d4 Nf6 2 c4 c5 3 d5 g6 | A56 Explore | Indian Defence-Normal Variation-Modern Benoni Defence-Fianchetto Variation |
| 1 d4 Nf6 2 c4 c5 3 d5 Ne4 | A56 Explore | Indian Defence-Normal Variation-Modern Benoni Defence-The Vulture Defence |
| 1 d4 Nf6 2 c4 c5 3 dxc5 e6 | A56 | Indian Defence-Normal Variation-Modern Benoni Defence-Weenink Variation |
| 1 d4 Nf6 2 c4 c6 | A50 Explore | Queen's Pawn-Indian Defence-Normal Variation-Slav Indian Defence |
| 1 d4 Nf6 2 c4 c6 3 Nf3 b5 | A50 | Indian Defence-Normal Variation-Slav Indian Defence-Kudischewitsch Gambit |
| 1 d4 Nf6 2 c4 d6 | A53 Explore | Queen's Pawn-Old Indian Defence |
| 1 d4 Nf6 2 c4 d6 3 g4 | A53 | Queen's Pawn-Old Indian Defence-Aged Gibbon Gambit |
| 1 d4 Nf6 2 c4 d6 3 Nc3 Bf5 | A53 | Queen's Pawn-Old Indian Defence-Janowski Variation |
| 1 d4 Nf6 2 c4 d6 3 Nc3 Bf5 4 e4 | A53 | Queen's Pawn-Old Indian Defence-Janowski Variation-Grinberg Gambit |
| 1 d4 Nf6 2 c4 d6 3 Nc3 Bf5 4 f3 | A53 | Queen's Pawn-Old Indian Defence-Janowski Variation-Main Line |
| 1 d4 Nf6 2 c4 d6 3 Nc3 Bf5 4 g3 | A53 | Queen's Pawn-Old Indian Defence-Janowski Variation-Fianchetto Variation |
| 1 d4 Nf6 2 c4 d6 3 Nc3 Bf5 4 Nf3 | A53 | Queen's Pawn-Old Indian Defence-Janowski Variation-Fianchetto Variation |
| 1 d4 Nf6 2 c4 d6 3 Nc3 c6 | A53 | Queen's Pawn-Old Indian Defence-Czech Variation |
| 1 d4 Nf6 2 c4 d6 3 Nc3 e5 | A54 | Queen's Pawn-Old Indian Defence-Ukrainian Variation |
| 1 d4 Nf6 2 c4 d6 3 Nc3 e5 4 e3 Nbd7 5 Bd3 | A53 | Queen's Pawn-Old Indian Defence-Ukrainian Variation-Dus-Khotimirsky Variation |
| 1 d4 Nf6 2 c4 d6 3 Nc3 e5 4 Nf3 | A54 | Queen's Pawn-Old Indian Defence-Ukrainian Variation-2 Knights Variation |
| 1 d4 Nf6 2 c4 d6 3 Nc3 e5 4 Nf3 Nbd7 5 e4 | A55 | Old Indian Defence-Ukrainian Variation-2 Knights Variation-Main/Normal Line |
| 1 d4 Nf6 2 c4 d6 3 Nf3 Bg4 | A54 | Queen's Pawn-Old Indian Defence-Tartakower-Indian Variation |
| 1 d4 Nf6 2 c4 d6 3 Nf3 c6 | A53 | Queen's Pawn-Old Indian Defence-Czech Variation |
| 1 d4 Nf6 2 c4 e5 | A51 Explore | Queen's Pawn-Indian Defence-Normal Variation-Budapest Gambit |
| 1 d4 Nf6 2 c4 e5 3 dxe5 Ne4 | A51 | Indian Defence-Normal Variation-Budapest Gambit-Fajarowicz-Richter Variation |
| 1 d4 Nf6 2 c4 e5 3 dxe5 Ne4 4 a3 b6 | A51 | Indian Defence-Budapest Gambit-Fajarowicz Variation-Bonsdorf Variation |
| 1 d4 Nf6 2 c4 e5 3 dxe5 Ne4 4 Qc2 | A51 | Indian Defence-Budapest Gambit-Fajarowicz Variation-Steiner Variation |
| 1 d4 Nf6 2 c4 e5 3 dxe5 Ng4 | A52 | Indian Defence-Normal Variation-Budapest Gambit-Normal Variation |
| 1 d4 Nf6 2 c4 e5 3 dxe5 Ng4 4 Bf4 | A52 | Indian Defence-Budapest Gambit-Normal Variation-Rubinstein Variation |
| 1 d4 Nf6 2 c4 e5 3 dxe5 Ng4 4 e4 | A52 | Indian Defence-Budapest Gambit-Normal Variation-Alekhine Variation |
| 1 d4 Nf6 2 c4 e5 3 dxe5 Ng4 4 e4 d6 | A52 | Indian Defence-Budapest Gambit-Normal Variation-Balogh/Tartakower Gambit |
| 1 d4 Nf6 2 c4 e5 3 dxe5 Ng4 4 e4 Nxe5 5 f4 Nec6 | A52 | Indian Defence-Budapest Gambit-Alekhine Variation-Abonyi Variation |
| 1 d4 Nf6 2 c4 e5 3 dxe5 Ng4 4 Nf3 | A52 | Indian Defence-Budapest Gambit-Normal Variation-Adler Variation |
| 1 d4 Nf6 2 c4 e6 | E00 Explore | Queen's Pawn-Indian Defence-Normal Variation-East Indian/Neo-Indian Defence |
| 1 d4 Nf6 2 c4 e6 3 Bg5 | E00 Explore | Queen's Pawn-East Indian Defence-Neo-Indian/Seirawan Attack |
| 1 d4 Nf6 2 c4 e6 3 g3 | E00 Explore | Queen's Pawn-East Indian Defence-Catalan Opening |
| 1 d4 Nf6 2 c4 e6 3 g3 d5 4 Bg2 | E01 | Queen's Pawn-East Indian Defence-Catalan Opening-Closed Variation |
| 1 d4 Nf6 2 c4 e6 3 g3 d5 4 Bg2 Be7 (5 Nf3) | E06 | Queen's Pawn-East Indian Defence-Catalan Opening-Closed Variation |
| 1 d4 Nf6 2 c4 e6 3 g3 d5 4 Bg2 Be7 5 Nf3 0-0 6 0-0 Nbd7 | E07 | Queen's Pawn-East Indian Defence-Catalan Opening-Closed Variation |
| 1 d4 Nf6 2 c4 e6 3 g3 d5 4 Bg2 Be7 5 Nf3 0-0 6 0-0 Nbd7 7 Nc3 c6 8 Qd3 | E07 | East Indian Defence-Catalan Opening-Closed Variation-Botvinnik Variation |
| 1 d4 Nf6 2 c4 e6 3 g3 d5 4 Bg2 Be7 5 Nf3 0-0 6 0-0 Nbd7 7 Qc2 | E08 | Queen's Pawn-East Indian Defence-Catalan Opening-Closed Variation |
| 1 d4 Nf6 2 c4 e6 3 g3 d5 4 Bg2 Be7 5 Nf3 0-0 6 0-0 Nbd7 7 Qc2 c6 8 b3 b6 9 Rd1 Bb7 10 Nc3 b5 | E08 | East Indian Defence-Catalan Opening-Closed Variation-Spassky Gambit |
| 1 d4 Nf6 2 c4 e6 3 g3 d5 4 Bg2 Be7 5 Nf3 0-0 6 0-0 Nbd7 7 Qc2 c6 8 Nbd2 | E09 | East Indian Defence-Catalan Opening-Closed Variation-Main Line |
| 1 d4 Nf6 2 c4 e6 3 g3 d5 4 Bg2 Be7 5 Nf3 0-0 6 0-0 Nbd7 7 Qc2 c6 8 Nbd2 b5 | E09 | East Indian Defence-Closed Variation-Main Line-Rabinovich Variation |
| 1 d4 Nf6 2 c4 e6 3 g3 d5 4 Bg2 Be7 5 Nf3 0-0 6 0-0 Nbd7 7 Qc2 c6 8 Nbd2 b6 9 b3 a5 10 Bb2 Ba6 | E09 | East Indian Defence-Catalan Opening-Main Line-Sokolsky/Traditional Variation |
| 1 d4 Nf6 2 c4 e6 3 g3 d5 4 Bg2 Be7 5 Nf3 0-0 6 0-0 Nbd7 7 Qc2 c6 8 Rd1 b6 9 a4 | E08 | East Indian Defence-Catalan Opening-Closed Variation-Zagoryansky Variation |
| 1 d4 Nf6 2 c4 e6 3 g3 d5 4 Bg2 c5 | E01 | East Indian Defence-Catalan Opening-Closed Variation-Tarrasch Defence |
| 1 d4 Nf6 2 c4 e6 3 g3 d5 4 Bg2 c5 5 Nf3 Nc6 | E04 | East Indian Defence-Catalan Opening-Closed Variation-Tarrasch Defence |
| 1 d4 Nf6 2 c4 e6 3 g3 d5 4 Bg2 dxc4 5 Nf3 | E04 | East Indian Defence-Catalan Opening-Closed Variation-Open Defence (Classical Variation) |
| 1 d4 Nf6 2 c4 e6 3 g3 d5 4 Bg2 dxc4 5 Nf3 Be7 | E05 | East Indian Defence-Closed Variation-Open Defence-Classical Line |
| 1 d4 Nf6 2 c4 e6 3 g3 d5 4 Bg2 dxc4 5 Nf3 Nc6 6 Qa4 Bb4+ | E04 | East Indian Defence-Closed Variation-Open Defence-Modern Sharp Variation |
| 1 d4 Nf6 2 c4 e6 3 g3 d5 4 Bg2 dxc4 (5 Qa4+) | E02 | East Indian Defence-Catalan Opening-Closed Variation-Open Defence |
| 1 d4 Nf6 2 c4 e6 3 g3 d5 4 Bg2 dxc4 5 Qa4+ Nbd7 6 Qxc4 | E03 | East Indian Defence-Catalan Opening-Closed Variation-Open Defence |
| 1 d4 Nf6 2 c4 e6 3 g3 d5 4 Bg2 dxc4 5 Qa4+ Nbd7 6 Qxc4 a6 7 Qc2 | E03 | East Indian Defence-Catalan Opening-Open Defence-Alekhine Variation |
| 1 d4 Nf6 2 c4 e6 3 g3 d5 4 Nf3 | E00/E01 | Queen's Pawn-East Indian Defence-Catalan Opening-Catalan Gambit |
| 1 d4 Nf6 2 c4 e6 3 g3 e5 | E00 | Queen's Pawn-East Indian Defence-Catalan Opening-Hungarian Gambit |
| 1 d4 Nf6 2 c4 e6 3 g4 | E00 Explore | Queen's Pawn-East Indian Defence-Devin Gambit |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 | E20 Explore | Queen's Pawn-Nimzo-Indian Defence |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 a3 | E20 Explore | Queen's Pawn-Nimzo-Indian Defence-Sämisch Variation |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 a3 Bxc3+ 5 bxc3 | E24 | Queen's Pawn-Nimzo-Indian Defence-Sämisch Variation |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 a3 Bxc3+ 5 bxc3 0-0 | E27 | Queen's Pawn-Nimzo-Indian Defence-Sämisch Variation |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 a3 Bxc3+ 5 bxc3 0-0 6 e3 | E28 | Queen's Pawn-Nimzo-Indian Defence-Sämisch Variation |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 a3 Bxc3+ 5 bxc3 0-0 6 e3 c5 7 Bd3 Nc6 | E29 | Queen's Pawn-Nimzo-Indian Defence-Sämisch Variation-Main Line |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 a3 Bxc3+ 5 bxc3 0-0 6 e3 c5 7 Bd3 Nc6 8 Ne2 b6 9 e4 Ne8 | E29 | Nimzo-Indian Defence-Sämisch Variation-Main Line-Capablanca Variation |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 a3 Bxc3+ 5 bxc3 c5 6 e3 | E26 | Queen's Pawn-Nimzo-Indian Defence-Sämisch Variation |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 a3 Bxc3+ 5 bxc3 c5 6 e3 b6 | E26 | Queen's Pawn-Nimzo-Indian Defence-Sämisch Variation-O'Kelly Variation |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 a3 Bxc3+ 5 bxc3 c5 6 f3 d5 7 cxd5 | E25 | Queen's Pawn-Nimzo-Indian Defence-Sämisch Variation |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 a3 Bxc3+ 5 bxc3 c5 6 f3 d5 7 cxd5 Nxd5 8 dxc5 | E25 | Queen's Pawn-Nimzo-Indian Defence-Sämisch Variation-Keres Variation |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 a3 Bxc3+ 5 bxc3 c5 6 f3 d5 7 cxd5 Nxd5 8 dxc5 f5 | E25 | Nimzo-Indian Defence-Sämisch Variation-Keres Variation-Romanovsky Variation |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 a3 Bxc3+ 5 bxc3 c5 6 f3 d5 7 e3 0-0 8 cxd5 Nxd5 | E24 | Queen's Pawn-Nimzo-Indian Defence-Sämisch Variation-Botvinnik Variation |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 Bg5 | E30 Explore | Queen's Pawn-Nimzo-Indian Defence-Leningrad Variation |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 Bg5 h6 5 Bh4 c5 6 d5 a6 | E31 | Queen's Pawn-Nimzo-Indian Defence-Leningrad Variation |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 Bg5 h6 5 Bh4 c5 6 d5 b5 | E30 | Queen's Pawn-Nimzo-Indian Defence-Leningrad Variation-Averbakh Gambit |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 Bg5 h6 5 Bh4 c5 6 d5 d6 | E31 | Queen's Pawn-Nimzo-Indian Defence-Leningrad Variation-Main/Benoni Defence |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 e3 | E40 Explore | Queen's Pawn-Nimzo-Indian Defence-Rubinstein/Normal Line |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 e3 0-0 | E46 | Queen's Pawn-Nimzo-Indian Defence-Rubinstein Line |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 e3 0-0 5 Bd3 | E47 | Queen's Pawn-Nimzo-Indian Defence-Rubinstein Line-Bishop/Normal Attack |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 e3 0-0 5 Bd3 d5 | E48 | Nimzo-Indian Defence-Rubinstein Line-Bishop Attack-Classical Defence |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 e3 0-0 5 Bd3 d5 6 a3 Bxc3+ 7 bxc3 | E49 | Nimzo-Indian Defence-Bishop Attack-Classical Defence-Botvinnik System |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 e3 0-0 5 Bd3 d5 6 a3 Bxc3+ 7 bxc3 c5 8 cxd5 exd5 9 Ne2 b6 | E49 | Nimzo-Indian Defence-Classical Defence-Botvinnik System-Keres Variation |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 e3 0-0 5 Nf3 | E50 | Queen's Pawn-Nimzo-Indian Defence-Rubinstein Line-Landau Variation |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 e3 0-0 5 Nf3 c5 | E50 | Nimzo-Indian Defence-Rubinstein Line-Landau Variation-Hübner Deferred Variation |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 e3 0-0 5 Nf3 d5 (6 Bd3 Nc6 7 0-0 dxc4) | E51 | Nimzo-Indian Defence-Rubinstein Line-Landau Variation-Ragozin Variation |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 e3 0-0 5 Nf3 d5 6 a3 | E51 | Nimzo-Indian Defence-Landau Variation-Ragozin Variation-Saemisch Deferred Variation |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 e3 0-0 5 Nf3 d5 6 Bd3 b6 | E52 | Nimzo-Indian Defence-Landau Variation-Ragozin Variation-Main/Schlechter Defence |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 e3 0-0 5 Nf3 d5 6 Bd3 c5 | E53 | Nimzo-Indian Defence-Landau Variation-Ragozin Variation-Main/Except Gligoric/Bernstein System |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 e3 0-0 5 Nf3 d5 6 Bd3 c5 7 0-0 b6 | E53 | Nimzo-Indian Defence-Ragozin Variation-Except Gligoric System-Keres Variation |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 e3 0-0 5 Nf3 d5 6 Bd3 c5 7 0-0 dxc4 (8 Bxc4) | E54 | Nimzo-Indian Defence-Ragozin Variation-Except Gligoric System-Gligoric System |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 e3 0-0 5 Nf3 d5 6 Bd3 c5 7 0-0 dxc4 8 Bxc4 b6 9 Qe2 Bb7 10 Rd1 Qc8 | E54 | Nimzo-Indian Defence-Except Gligoric System-Gligoric System-Olafsson Variation |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 e3 0-0 5 Nf3 d5 6 Bd3 c5 7 0-0 dxc4 8 Bxc4 Bd7 | E54 | Nimzo-Indian Defence-Except Gligoric System-Gligoric System-Russian Variation |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 e3 0-0 5 Nf3 d5 6 Bd3 c5 7 0-0 dxc4 8 Bxc4 Nbd7 | E55 | Nimzo-Indian Defence-Except Gligoric System-Gligoric System-Bronstein Variation |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 e3 0-0 5 Nf3 d5 6 Bd3 c5 7 0-0 dxc4 8 Bxc4 Qe7 | E54 | Nimzo-Indian Defence-Except Gligoric System-Gligoric System-Smyslov Variation |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 e3 0-0 5 Nf3 d5 6 Bd3 c5 7 0-0 Nbd7 | E53 | Nimzo-Indian Defence-Ragozin Variation-Except Gligoric System-Gligoric System |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 e3 0-0 5 Nf3 d5 6 Bd3 c5 7 0-0 Nc6 | E56 | Nimzo-Indian Defence-Ragozin Variation-Except Gligoric System-Bernstein Defence |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 e3 0-0 5 Nf3 d5 6 Bd3 c5 7 0-0 Nc6 8 a3 Bxc3 9 bxc3 | E58 | Nimzo-Indian Defence-Except Gligoric System-Bernstein Defence-Exchange Line |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 e3 0-0 5 Nf3 d5 6 Bd3 c5 7 0-0 Nc6 8 a3 Bxc3 9 bxc3 dxc4 10 Bxc4 | E59 | Nimzo-Indian Defence-Except Gligoric System-Bernstein Defence-Exchange Line |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 e3 0-0 5 Nf3 d5 6 Bd3 c5 7 0-0 Nc6 8 a3 dxc4 9 Bxc4 cxd4 | E57 | Nimzo-Indian Defence-Ragozin Variation-Except Gligoric System-Bernstein Defence |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 e3 0-0 5 Nge2 | E46 | Queen's Pawn-Nimzo-Indian Defence-Rubinstein Line-Reshevsky Variation |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 e3 0-0 5 Nge2 d5 6 a3 Bd6 | E46 | Nimzo-Indian Defence-Rubinstein Line-Reshevsky Variation-Simagin Variation |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 e3 b6 | E43 | Queen's Pawn-Nimzo-Indian Defence-Rubinstein Line-St. Petersburg Variation |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 e3 b6 5 Nge2 | E44 | Nimzo-Indian Defence-Rubinstein Line-St. Petersburg Variation-Fischer Variation |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 e3 b6 5 Nge2 Ba6 | E45 | Nimzo-Indian Defence-St. Petersburg Variation-Fischer Variation-Bronstein/Byrne Variation |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 e3 c5 | E41 | Queen's Pawn-Nimzo-Indian Defence-Rubinstein Line (Hübner Variation) |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 e3 c5 (5 Bd3 Nc6 6 Nf3 Bxc3+) | E41 | Queen's Pawn-Nimzo-Indian Defence-Rubinstein Line-Hübner Variation |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 e3 c5 5 Bd3 Nc6 6 Nf3 Bxc3+ 7 bxc3 d6 | E41 | Nimzo-Indian Defence-Rubinstein Line-Hübner Variation-Main Line |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 e3 c5 5 Nf3 cxd4 6 exd4 d5 | E54 | Nimzo-Indian Defence-Rubinstein Line-Hübner Variation-Panov Attack (Main Line) |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 e3 c5 5 Nge2 | E42 | Queen's Pawn-Nimzo-Indian Defence-Rubinstein Line-Hübner Variation |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 e3 c5 5 Nge2 cxd4 6 exd4 0-0 7 a3 | E42 | Nimzo-Indian Defence-Rubinstein Line-Hübner Variation-Main Line |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 e3 c5 5 Nge2 cxd4 6 exd4 0-0 7 c5 | E42 | Nimzo-Indian Defence-Rubinstein Line-Hübner Variation-Sherbakov Attack |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 e3 Nc6 | E40 | Queen's Pawn-Nimzo-Indian Defence-Rubinstein Line-Taimanov Variation |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 e3 Nc6 5 Nf3 0-0 6 Bd3 d5 7 0-0 | E46 | Nimzo-Indian Defence-Rubinstein Line-Taimanov Variation-Ragozin Defence |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 f3 | E20 Explore | Queen's Pawn-Nimzo-Indian Defence-Kmoch Variation |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 g3 | E20 Explore | Queen's Pawn-Nimzo-Indian Defence-Romanishin-Kasparov/Steiner System |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 Nf3 | E21 Explore | Queen's Pawn-Nimzo-Indian Defence-3 Knights Variation |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 Nf3 b6 | E21 Explore | Queen's Pawn-Nimzo-Indian Defence-3 Knights Variation-Duchamp Variation |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 Nf3 b6 5 Bg5 Bb7 6 Nd2 | E21 | Nimzo-Indian Defence-3 Knights Variation-Duchamp Variation-Modern Line |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 Nf3 c5 5 d5 | E21 | Queen's Pawn-Nimzo-Indian Defence-3 Knights Variation-Korchnoi Variation |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 Nf3 c5 5 d5 b5 | E21 | Nimzo-Indian Defence-3 Knights Variation-Korchnoi Variation-Shocron Gambit |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 Nf3 c5 5 d5 Ne4 | E21 | Nimzo-Indian Defence-3 Knights Variation-Korchnoi Variation-Euwe Variation |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 Nf3 c5 5 g3 0-0 6 Bg2 | E21 | Queen's Pawn-Nimzo-Indian Defence-3 Knights Variation-Romanishin Variation |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 Nf3 c5 5 g3 0-0 6 Bg2 cxd4 7 Nxd4 d5 8 cxd5 Nxd5 | E21 | Nimzo-Indian Defence-3 Knights Variation-Romanishin Variation-English Hybrid |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 Nf3 d5 | E21 Explore | Queen's Pawn-Nimzo-Indian Defence-3 Knights Variation-Ragozin Variation |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 Qb3 | E22 Explore | Queen's Pawn-Nimzo-Indian Defence-Spielmann Variation |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 Qb3 c5 5 dxc5 Nc6 | E23 | Queen's Pawn-Nimzo-Indian Defence-Spielmann Variation-Romanovsky Gambit |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 Qb3 c5 5 dxc5 Nc6 6 Nf3 Ne4 7 Bd2 Nxc5 | E23 | Nimzo-Indian Defence-Spielmann Variation-Romanovsky Gambit-San Remo/Stahlberg Variation |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 Qb3 c5 5 dxc5 Nc6 6 Nf3 Ne4 7 Bd2 Nxc5 8 Qc2 f5 9 g3 | E23 | Nimzo-Indian Defence-Romanovsky Gambit-San Remo Variation-Ståhlberg Variation |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 Qb3 c5 5 dxc5 Nc6 6 Nf3 Ne4 7 Bd2 Nxd2 | E23 | Nimzo-Indian Defence-Spielmann Variation-Romanovsky Gambit-Karlsbad/Carlsbad Variation |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 Qc2 | E32 Explore | Queen's Pawn-Nimzo-Indian Defence-Classical Variation |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 Qc2 0-0 5 a3 Bxc3+ 6 Qxc3 b5 | E32 | Queen's Pawn-Nimzo-Indian Defence-Classical Variation-Vitolinsh-Adorjan Gambit |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 Qc2 0-0 5 a3 Bxc3+ 6 Qxc3 b6 | E32 | Queen's Pawn-Nimzo-Indian Defence-Classical Variation-Keres Defence |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 Qc2 c5 | E38 | Queen's Pawn-Nimzo-Indian Defence-Classical Variation-Berlin Variation |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 Qc2 c5 5 dxc5 0-0 | E39 | Nimzo-Indian Defence-Classical Variation-Berlin Variation-Pirc/Lisitsyn-Bondarevsky Gambit |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 Qc2 c5 5 dxc5 0-0 6 a3 Bxc5 7 Nf3 b6 8 Bf4 | E39 | Nimzo-Indian Defence-Berlin Variation-Pirc Gambit-Macieja System |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 Qc2 c5 5 dxc5 Bxc3+ | E39 | Nimzo-Indian Defence-Classical Variation-Berlin Variation-Steiner Variation |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 Qc2 d5 | E34 | Queen's Pawn-Nimzo-Indian Defence-Classical Variation-Noa Variation |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 Qc2 d5 5 a3 | E36 | Queen's Pawn-Nimzo-Indian Defence-Classical Variation-Noa Variation |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 Qc2 d5 5 a3 Bxc3+ 6 Qxc3 Nc6 | E36 | Nimzo-Indian Defence-Classical Variation-Noa Variation-Botvinnik Variation |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 Qc2 d5 5 a3 Bxc3+ 6 Qxc3 Ne4 | E36/E37 | Nimzo-Indian Defence-Classical Variation-Noa Variation-Main Line |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 Qc2 d5 5 a3 Bxc3+ 6 Qxc3 Ne4 7 Qc2 | E37 | Nimzo-Indian Defence-Classical Variation-Noa Variation-Main Line |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 Qc2 d5 5 a3 Bxc3+ 6 Qxc3 Ne4 7 Qc2 Nc6 8 e3 e5 | E37 | Nimzo-Indian Defence-Noa Variation-Main Line-San Remo Variation |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 Qc2 d5 5 cxd5 exd5 | E35 | Queen's Pawn-Nimzo-Indian Defence-Classical Variation-Noa Variation |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 Qc2 d5 5 cxd5 Qxd5 | E35 | Nimzo-Indian Defence-Classical Variation-Noa Variation-Modern Line |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 Qc2 d5 5 cxd5 Qxd5 6 Nf3 Qf5 7 Qd1 e5 | E35 | Nimzo-Indian Defence-Noa Variation-Modern Line-Belyavsky Gambit |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 Qc2 Nc6 | E33 | Queen's Pawn-Nimzo-Indian Defence-Classical Variation-Zurich/Milner-Barry Variation |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 Qc2 Nc6 5 Nf3 d6 | E33 | Nimzo-Indian Defence-Classical Variation-Zurich Variation-Milner-Barry/Zurich Variation |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 Qc2 Nc6 5 Nf3 d6 6 a3 | E33 | Nimzo-Indian Defence-Classical Variation-Zurich Variation-Milner-Barry Variation-Old Zurich Variation |
| 1 d4 Nf6 2 c4 e6 3 Nc3 Bb4 4 Qd3 | E20 Explore | Queen's Pawn-Nimzo-Indian Defence-Mikenas Attack |
| 1 d4 Nf6 2 c4 e6 3 Nf3 | E10 Explore | Queen's Pawn-East Indian Defence-Anti-Nimzo-Indian Variation |
| 1 d4 Nf6 2 c4 e6 3 Nf3 a6 | E10 | Queen's Pawn-East Indian Defence-Anti-Nimzo-Indian Variation-Dzindzikhashvili/Dzindzi-Indian Defence |
| 1 d4 Nf6 2 c4 e6 3 Nf3 b6 | E12 | Queen's Pawn-Queen's Indian Defence |
| 1 d4 Nf6 2 c4 e6 3 Nf3 b6 4 a3 | E12 | Queen's Pawn-Queen's Indian Defence-Petrosian System |
| 1 d4 Nf6 2 c4 e6 3 Nf3 b6 4 a3 Ba6 5 Qc2 Bb7 | E12 | Queen's Pawn-Queen's Indian Defence-Petrosian System-Farago Defence |
| 1 d4 Nf6 2 c4 e6 3 Nf3 b6 4 a3 Bb7 5 Nc3 d5 6 cxd5 Nxd5 7 Qc2 c5 8 e4 Nxc3 9 bxc3 Nc6 10 Bb2 cxd4 11 cxd4 Rc8 12 Rd1 Bd6 | E12 | Queen's Pawn-Queen's Indian Defence-Petrosian System-Murey Variation |
| 1 d4 Nf6 2 c4 e6 3 Nf3 b6 4 Bf4 | E12 | Queen's Pawn-Queen's Indian Defence-Miles Variation |
| 1 d4 Nf6 2 c4 e6 3 Nf3 b6 4 e3 | E14 | Queen's Pawn-Queen's Indian Defence-Spassky System |
| 1 d4 Nf6 2 c4 e6 3 Nf3 b6 4 e3 Bb7 5 Bd3 c5 6 0-0 Be7 7 b3 0-0 8 Bb2 cxd4 9 Nxd4 | E14 | Queen's Pawn-Queen's Indian Defence-Spassky System-Averbakh Variation |
| 1 d4 Nf6 2 c4 e6 3 Nf3 b6 4 g3 | E15 | Queen's Pawn-Queen's Indian Defence-Fianchetto Variation |
| 1 d4 Nf6 2 c4 e6 3 Nf3 b6 4 g3 Ba6 | E15 | Queen's Pawn-Queen's Indian Defence-Fianchetto Variation-Nimzowitsch/Exaggerated Fianchetto Variation |
| 1 d4 Nf6 2 c4 e6 3 Nf3 b6 4 g3 Ba6 5 b3 | E15 | Queen's Indian Defence-Fianchetto Variation-Nimzowitsch Variation-Quiet Line |
| 1 d4 Nf6 2 c4 e6 3 Nf3 b6 4 g3 Ba6 5 b3 Bb4+ | E15 | Queen's Indian Defence-Nimzowitsch Variation-Quiet Line-Check Variation |
| 1 d4 Nf6 2 c4 e6 3 Nf3 b6 4 g3 Ba6 5 b3 Bb4+ 6 Bd2 Be7 | E15 | Queen's Indian Defence-Quiet Line-Check Variation-Intermezzo Line |
| 1 d4 Nf6 2 c4 e6 3 Nf3 b6 4 g3 Ba6 5 b3 Bb4+ 6 Bd2 Qe7 | E15 | Queen's Indian Defence-Quiet Line-Check Variation-Modern Line |
| 1 d4 Nf6 2 c4 e6 3 Nf3 b6 4 g3 Ba6 5 Qa4 | E15 | Queen's Indian Defence-Fianchetto Variation-Nimzowitsch Variation-Nimzowitsch Attack |
| 1 d4 Nf6 2 c4 e6 3 Nf3 b6 4 g3 Ba6 5 Qb3 | E15 | Queen's Indian Defence-Fianchetto Variation-Nimzowitsch Variation-Timman's Line |
| 1 d4 Nf6 2 c4 e6 3 Nf3 b6 4 g3 Bb7 | E15 | Queen's Pawn-Queen's Indian Defence-Fianchetto Traditional Variation |
| 1 d4 Nf6 2 c4 e6 3 Nf3 b6 4 g3 Bb7 5 Bg2 Bb4+ | E16 | Queen's Pawn-Queen's Indian Defence-Fianchetto Traditional Variation-Capablanca Variation |
| 1 d4 Nf6 2 c4 e6 3 Nf3 b6 4 g3 Bb7 5 Bg2 Bb4+ 6 Bd2 a5 | E16 | Queen's Indian Defence-Fianchetto Traditional Variation-Capablanca Variation-Yates Variation |
| 1 d4 Nf6 2 c4 e6 3 Nf3 b6 4 g3 Bb7 5 Bg2 Bb4+ 6 Bd2 Be7 | E16 | Queen's Indian Defence-Fianchetto Traditional Variation-Capablanca Variation-Riumin Variation |
| 1 d4 Nf6 2 c4 e6 3 Nf3 b6 4 g3 Bb7 5 Bg2 Bb4+ 6 Bd2 Bxd2+ 7 Qxd2 0-0 8 Nc3 Ne4 9 Qc2 Nxc3 10 Ng5 | E16 | Queen's Indian Defence-Fianchetto Traditional Variation-Capablanca Variation-Monticeli Trap |
| 1 d4 Nf6 2 c4 e6 3 Nf3 b6 4 g3 Bb7 5 Bg2 Be7 | E17 | Queen's Pawn-Queen's Indian Defence-Fianchetto Traditional Variation-Traditional/Classical Variation |
| 1 d4 Nf6 2 c4 e6 3 Nf3 b6 4 g3 Bb7 5 Bg2 Be7 6 0-0 | E17 | Queen's Indian Defence-Fianchetto Traditional Variation-Traditional Variation-Old Main/Classical Line |
| 1 d4 Nf6 2 c4 e6 3 Nf3 b6 4 g3 Bb7 5 Bg2 Be7 6 0-0 0-0 7 b3 | E17 | Queen's Indian Defence-Traditional Variation-Old Main Line-Euwe Variation |
| 1 d4 Nf6 2 c4 e6 3 Nf3 b6 4 g3 Bb7 5 Bg2 Be7 6 0-0 0-0 7 d5 exd5 8 Nd4 | E17 | Queen's Indian Defence-Traditional Variation-Old Main Line-Taimanov Gambit |
| 1 d4 Nf6 2 c4 e6 3 Nf3 b6 4 g3 Bb7 5 Bg2 Be7 6 0-0 0-0 7 d5 exd5 8 Nh4 | E17 | Queen's Indian Defence-Traditional Variation-Old Main Line-Polugayevsky Gambit |
| 1 d4 Nf6 2 c4 e6 3 Nf3 b6 4 g3 Bb7 5 Bg2 Be7 6 0-0 0-0 7 Nc3 | E18 | Queen's Indian Defence-Fianchetto Traditional Variation-Traditional Variation-Old Main Line |
| 1 d4 Nf6 2 c4 e6 3 Nf3 b6 4 g3 Bb7 5 Bg2 Be7 6 0-0 0-0 7 Nc3 d5 | E18 | Queen's Indian Defence-Traditional Variation-Old Main Line-Nimowitsch Line |
| 1 d4 Nf6 2 c4 e6 3 Nf3 b6 4 g3 Bb7 5 Bg2 Be7 6 0-0 0-0 7 Nc3 Na6 | E18 | Queen's Indian Defence-Traditional Variation-Old Main Line-Tiviakov Defence |
| 1 d4 Nf6 2 c4 e6 3 Nf3 b6 4 g3 Bb7 5 Bg2 Be7 6 0-0 0-0 7 Nc3 Ne4 8 Qc2 Nxc3 9 Qxc3 | E19 | Queen's Indian Defence-Traditional Variation-Old Main Line-Main Line |
| 1 d4 Nf6 2 c4 e6 3 Nf3 b6 4 g3 Bb7 5 Bg2 Be7 6 0-0 0-0 7 Re1 | E17 | Queen's Indian Defence-Traditional Variation-Old Main Line-Kramnik Variation |
| 1 d4 Nf6 2 c4 e6 3 Nf3 b6 4 g3 Bb7 5 Bg2 Be7 6 Nc3 | E17 | Queen's Indian Defence-Fianchetto Traditional Variation-Traditional Variation-Anti-Queen's Indian System |
| 1 d4 Nf6 2 c4 e6 3 Nf3 b6 4 g3 Bb7 5 Bg2 Be7 6 Nc3 Ne4 7 Bd2 | E17 | Queen's Indian Defence-Traditional Variation-Anti-Queen's Indian System-Opocensky Variation |
| 1 d4 Nf6 2 c4 e6 3 Nf3 b6 4 g3 Bb7 5 Bg2 c5 | E15 | Queen's Pawn-Queen's Indian Defence-Fianchetto Traditional Variation-Sämisch Variation |
| 1 d4 Nf6 2 c4 e6 3 Nf3 b6 4 g3 Bb7 5 Bg2 c5 6 d5 exd5 7 Ng5 | E15 | Queen's Indian Defence-Fianchetto Traditional Variation-Sämisch Variation-Buerger Variation |
| 1 d4 Nf6 2 c4 e6 3 Nf3 b6 4 g3 Bb7 5 Bg2 c5 6 d5 exd5 7 Nh4 | E16 | Queen's Indian Defence-Fianchetto Traditional Variation-Sämisch Variation-Rubinstein Variation |
| 1 d4 Nf6 2 c4 e6 3 Nf3 b6 4 g3 Bb7 5 Bg2 Qc8 6 0-0 c5 7 d5 | E15 | Queen's Pawn-Queen's Indian Defence-Fianchetto Traditional Variation-Fine Variation |
| 1 d4 Nf6 2 c4 e6 3 Nf3 b6 4 Nc3 | E12 | Queen's Pawn-Queen's Indian Defence-Kasparov/Russian Variation |
| 1 d4 Nf6 2 c4 e6 3 Nf3 b6 4 Nc3 Bb7 5 a3 | E12 | Queen's Pawn-Queen's Indian Defence-Kasparov Variation-Kasparov-Petrosian Variation |
| 1 d4 Nf6 2 c4 e6 3 Nf3 b6 4 Nc3 Bb7 5 a3 Be7 | E12 | Queen's Indian Defence-Kasparov Variation-Kasparov-Petrosian Variation-Marco Defence |
| 1 d4 Nf6 2 c4 e6 3 Nf3 b6 4 Nc3 Bb7 5 a3 d5 | E12 | Queen's Indian Defence-Kasparov Variation-Kasparov-Petrosian Variation-Main Line |
| 1 d4 Nf6 2 c4 e6 3 Nf3 b6 4 Nc3 Bb7 5 a3 d5 6 cxd5 exd5 | E12 | Queen's Indian Defence-Kasparov-Petrosian Variation-Main Line-Classical Variation |
| 1 d4 Nf6 2 c4 e6 3 Nf3 b6 4 Nc3 Bb7 5 a3 d5 6 cxd5 Nxd5 | E12 | Queen's Indian Defence-Kasparov-Petrosian Variation-Main Line-Modern Variation |
| 1 d4 Nf6 2 c4 e6 3 Nf3 b6 4 Nc3 Bb7 5 a3 d5 6 cxd5 Nxd5 7 Bd2 | E12 | Queen's Indian Defence-Kasparov-Petrosian Variation-Modern Variation-Romanishin Attack |
| 1 d4 Nf6 2 c4 e6 3 Nf3 b6 4 Nc3 Bb7 5 a3 d5 6 cxd5 Nxd5 7 e3 | E12 | Queen's Indian Defence-Kasparov-Petrosian Variation-Modern Variation-Petrosian Attack |
| 1 d4 Nf6 2 c4 e6 3 Nf3 b6 4 Nc3 Bb7 5 a3 d5 6 cxd5 Nxd5 7 e4 | E12 | Queen's Indian Defence-Kasparov-Petrosian Variation-Modern Variation-Polovodin Gambit |
| 1 d4 Nf6 2 c4 e6 3 Nf3 b6 4 Nc3 Bb7 5 a3 d5 6 cxd5 Nxd5 7 Qa4+ | E12 | Queen's Indian Defence-Kasparov-Petrosian Variation-Modern Variation-Rashkovsky Attack |
| 1 d4 Nf6 2 c4 e6 3 Nf3 b6 4 Nc3 Bb7 5 a3 d5 6 cxd5 Nxd5 7 Qc2 | E12 | Queen's Indian Defence-Kasparov-Petrosian Variation-Modern Variation-Kasparov Attack |
| 1 d4 Nf6 2 c4 e6 3 Nf3 b6 4 Nc3 Bb7 5 a3 g6 | E17 | Queen's Indian Defence-Kasparov Variation-Kasparov-Petrosian Variation-Hedgehog Variation |
| 1 d4 Nf6 2 c4 e6 3 Nf3 b6 4 Nc3 Bb7 5 a3 Ne4 | E12 | Queen's Indian Defence-Kasparov Variation-Kasparov-Petrosian Variation-Andersson Variation |
| 1 d4 Nf6 2 c4 e6 3 Nf3 b6 4 Nc3 Bb7 5 Bg5 h6 6 Bh4 Bb4 | E13 | Queen's Pawn-Queen's Indian Defence-Kasparov Variation-Main Line |
| 1 d4 Nf6 2 c4 e6 3 Nf3 b6 4 Nc3 Bb7 5 Bg5 h6 6 Bh4 g5 7 Bg3 Nh5 | E12 | Queen's Pawn-Queen's Indian Defence-Kasparov Variation-Botvinnik Attack |
| 1 d4 Nf6 2 c4 e6 3 Nf3 Bb4+ | E11 | Queen's Pawn-Bogo-Indian Defence |
| 1 d4 Nf6 2 c4 e6 3 Nf3 Bb4+ 4 Bd2 a5 | E11 | Queen's Pawn-Bogo-Indian Defence-Wade-Smyslov Variation |
| 1 d4 Nf6 2 c4 e6 3 Nf3 Bb4+ 4 Bd2 Be7 | E11 | Queen's Pawn-Bogo-Indian Defence-Retreat Variation |
| 1 d4 Nf6 2 c4 e6 3 Nf3 Bb4+ 4 Bd2 Bxd2+ | E11 | Queen's Pawn-Bogo-Indian Defence-Exchange Variation |
| 1 d4 Nf6 2 c4 e6 3 Nf3 Bb4+ 4 Bd2 Bxd2+ 5 Qxd2 b6 6 g3 Bb7 7 Bg2 0-0 8 Nc3 Ne4 9 Qc2 Nxc3 10 Ng5 | E11 | Queen's Pawn-Bogo-Indian Defence-Exchange Variation-Monticelli Trap |
| 1 d4 Nf6 2 c4 e6 3 Nf3 Bb4+ 4 Bd2 c5 | E11 | Queen's Pawn-Bogo-Indian Defence-Vitolinsh Variation |
| 1 d4 Nf6 2 c4 e6 3 Nf3 Bb4+ 4 Bd2 Nc6 | E11 | Queen's Pawn-Bogo-Indian Defence-Haiti Variation |
| 1 d4 Nf6 2 c4 e6 3 Nf3 Bb4+ 4 Bd2 Qe7 | E11 | Queen's Pawn-Bogo-Indian Defence-Nimzowitsch Variation |
| 1 d4 Nf6 2 c4 e6 3 Nf3 Bb4+ 4 Nbd2 | E11 | Queen's Pawn-Bogo-Indian Defence-Grünfeld Variation |
| 1 d4 Nf6 2 c4 e6 3 Nf3 Bb4+ 4 Nfd2 | E11 | Queen's Pawn-Bogo-Indian Defence-New England Variation |
| 1 d4 Nf6 2 c4 e6 3 Nf3 c5 | E10 | Queen's Pawn-East Indian Defence-Anti-Nimzo-Indian Variation-Blumenfeld Variation |
| 1 d4 Nf6 2 c4 e6 3 Nf3 c5 4 d5 b5 | E10 | East Indian Defence-Anti-Nimzo-Indian Variation-Blumenfeld Variation-Blumenfeld Countergambit |
| 1 d4 Nf6 2 c4 e6 3 Nf3 c5 4 d5 b5 5 Bg5 | E10 | East Indian Defence-Anti-Nimzo-Indian Variation-Blumenfeld Countergambit-Dus-Chotimursky/Dus Chotmirsky Variation |
| 1 d4 Nf6 2 c4 e6 3 Nf3 c5 4 d5 b5 5 Bg5 exd5 6 cxd5 h6 | E10 | East Indian Defence-Blumenfeld Countergambit-Dus-Chotimursky Variation-Spielmann Variation |
| 1 d4 Nf6 2 c4 e6 3 Nf3 c5 4 d5 b5 5 dxe6 fxe6 6 cxb5 d5 | E10 | East Indian Defence-Anti-Nimzo-Indian Variation-Blumenfeld Countergambit Accepted |
| 1 d4 Nf6 2 c4 e6 3 Nf3 c5 4 d5 b5 5 e4 | E10 | East Indian Defence-Anti-Nimzo-Indian Variation-Blumenfeld Countergambit-Rubinstein Variation |
| 1 d4 Nf6 2 c4 e6 3 Nf3 d6 | E10 | Queen's Pawn-East Indian Defence-Anti-Nimzo-Indian Variation-Small Centre Variation |
| 1 d4 Nf6 2 c4 e6 3 Nf3 Ne4 | E10 | Queen's Pawn-East Indian Defence-Anti-Nimzo-Indian Variation-Döry Indian Defence |
| 1 d4 Nf6 2 c4 g5 | A50 Explore | Queen's Pawn-Indian Defence-Normal Variation-Medusa Gambit |
| 1 d4 Nf6 2 c4 g6 | E60 Explore | Queen's Pawn-King's Indian/Kingside Fianchetto Defence |
| 1 d4 Nf6 2 c4 g6 3 d5 | E60 | Queen's Pawn-King's Indian Defence-Anti-Grünfeld/Advance Variation |
| 1 d4 Nf6 2 c4 g6 3 d5 b5 | E60 | Queen's Pawn-King's Indian Defence-Anti-Grünfeld-Danube/Adorjan Gambit |
| 1 d4 Nf6 2 c4 g6 3 f3 | D70 | Queen's Pawn-King's Indian Defence-Alekhine/Nimzovich Variation |
| 1 d4 Nf6 2 c4 g6 3 f3 d5 | D70 | King's Indian Defence-Alekhine Variation-Neo-Grünfeld Defence/Goglidze Attack |
| 1 d4 Nf6 2 c4 g6 3 f3 e5 | D70 | Queen's Pawn-King's Indian Defence-Alekhine Variation-Leko Gambit |
| 1 d4 Nf6 2 c4 g6 3 g3 | E60 | Queen's Pawn-King's Indian Defence-Neo-Grünfeld/Immediate Fianchetto Variation |
| 1 d4 Nf6 2 c4 g6 3 g3 Bg7 4 Bg2 d5 | E60 | Queen's Pawn-King's Indian Defence-Neo-Grünfeld-Counterthrust Variation |
| 1 d4 Nf6 2 c4 g6 3 g3 d5 | D70/D71 | Queen's Pawn-King's Indian Defence-Kemeri/Neo-Grünfeld Defence |
| 1 d4 Nf6 2 c4 g6 3 g3 d5 4 Bg2 Bg7 | D70/D71 | Queen's Pawn-King's Indian Defence-Kemeri Defence-Counterthrust Variation |
| 1 d4 Nf6 2 c4 g6 3 g3 d5 4 Bg2 Bg7 5 cxd5 Nxd5 | D71 | King's Indian Defence-Kemeri Defence-Counterthrust Variation-Exchange Variation |
| 1 d4 Nf6 2 c4 g6 3 g3 d5 4 Bg2 Bg7 5 cxd5 Nxd5 6 e4 Nb6 | D71/D72 | King's Indian Defence-Exchange Variation-Main Line-Botvinnik Variation |
| 1 d4 Nf6 2 c4 g6 3 g3 d5 4 Bg2 Bg7 5 cxd5 Nxd5 6 e4 Nb6 7 Ne2 | D72 | King's Indian Defence-Exchange Variation-Main Line-Botvinnik Variation |
| 1 d4 Nf6 2 c4 g6 3 g3 d5 4 Bg2 Bg7 5 Nf3 | D73 | King's Indian Defence-Kemeri Defence-Counterthrust Variation-Reshevsky Variation |
| 1 d4 Nf6 2 c4 g6 3 g3 d5 4 Bg2 Bg7 5 Nf3 0-0 6 0-0 | D77 | King's Indian Defence-Counterthrust Variation-Reshevsky Variation-Classical/Alekhine Variation |
| 1 d4 Nf6 2 c4 g6 3 g3 d5 4 Bg2 Bg7 5 Nf3 0-0 6 0-0 c6 | D78 | King's Indian Defence-Reshevsky Variation-Classical Variation-Original/Bogolubov Defence |
| 1 d4 Nf6 2 c4 g6 3 g3 d5 4 Bg2 Bg7 5 Nf3 0-0 6 0-0 c6 7 cxd5 | D78/D79 | King's Indian Defence-Classical Variation-Original Defence-Kashdan Variation |
| 1 d4 Nf6 2 c4 g6 3 g3 d5 4 Bg2 Bg7 5 Nf3 0-0 6 0-0 c6 7 cxd5 cxd5 | D79 | King's Indian Defence-Original Defence-Kashdan Variation-Ultra-Delayed Exchange Line |
| 1 d4 Nf6 2 c4 g6 3 g3 d5 4 Bg2 Bg7 5 Nf3 0-0 6 0-0 dxc4 | D78 | King's Indian Defence-Reshevsky Variation-Classical Variation-Modern Defence |
| 1 d4 Nf6 2 c4 g6 3 g3 d5 4 Bg2 Bg7 5 Nf3 0-0 6 0-0 Nc6 | D78 | King's Indian Defence-Reshevsky Variation-Classical Variation-Polgar Variation |
| 1 d4 Nf6 2 c4 g6 3 g3 d5 4 Bg2 Bg7 5 Nf3 0-0 6 cxd5 Nxd5 7 0-0 | D74 | King's Indian Defence-Counterthrust Variation-Reshevsky Variation-Delayed Exchange/Margate Variation |
| 1 d4 Nf6 2 c4 g6 3 g3 d5 4 Bg2 Bg7 5 Nf3 0-0 6 cxd5 Nxd5 7 0-0 c5 8 dxc5 | D75 | King's Indian Defence-Counterthrust Variation-Reshevsky Variation-Delayed Exchange Variation |
| 1 d4 Nf6 2 c4 g6 3 g3 d5 4 Bg2 Bg7 5 Nf3 0-0 6 cxd5 Nxd5 7 0-0 c5 8 Nc3 | D75 | King's Indian Defence-Counterthrust Variation-Reshevsky Variation-Delayed Exchange Variation |
| 1 d4 Nf6 2 c4 g6 3 g3 d5 4 Bg2 Bg7 5 Nf3 0-0 6 cxd5 Nxd5 7 0-0 Nb6 | D76 | King's Indian Defence-Counterthrust Variation-Reshevsky Variation-Delayed Exchange Variation |
| 1 d4 Nf6 2 c4 g6 3 Nc3 | E61 | Queen's Pawn-King's Indian Defence |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 Bg5 | E61 | Queen's Pawn-King's Indian Defence-Smyslov Variation |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 e4 | E70 | Queen's Pawn-King's Indian Defence-Normal/Schwarz Variation |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 e4 d6 5 Be2 | E73 | Queen's Pawn-King's Indian Defence-Normal Variation-Standard Development |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 e4 d6 5 Be2 0-0 6 Be3 | E73 | King's Indian Defence-Normal Variation-Standard Development-Semi-Averbakh System |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 e4 d6 5 Be2 0-0 6 Bg5 | E73 | King's Indian Defence-Normal Variation-Standard Development-Averbakh System |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 e4 d6 5 Be2 0-0 6 Bg5 a6 | E73 | King's Indian Defence-Standard Development-Averbakh System-Spanish Defence |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 e4 d6 5 Be2 0-0 6 Bg5 c5 | E74 | King's Indian Defence-Standard Development-Averbakh System-Benoni Defence |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 e4 d6 5 Be2 0-0 6 Bg5 c5 7 d5 | E75 | King's Indian Defence-Averbakh System-Benoni Defence-Advance Variation |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 e4 d6 5 Be2 0-0 6 Bg5 c5 7 d5 e6 | E75 | King's Indian Defence-Benoni Defence-Advance Variation-Main Line |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 e4 d6 5 Be2 0-0 6 Bg5 c5 7 dxc5 | E74 | King's Indian Defence-Averbakh System-Benoni Defence-Exchange Variation |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 e4 d6 5 Be2 0-0 6 Bg5 h6 | E73 | King's Indian Defence-Standard Development-Averbakh System-Flexible Defence |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 e4 d6 5 Be2 0-0 6 Bg5 Na6 | E73 | King's Indian Defence-Standard Development-Averbakh System-Modern Defence |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 e4 d6 5 Be2 0-0 6 Bg5 Na6 7 Qd2 c6 | E73 | King's Indian Defence-Averbakh System-Modern Defence-Burgess Line |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 e4 d6 5 Be2 0-0 6 Bg5 Nbd7 | E73 | King's Indian Defence-Standard Development-Averbakh System-Geller Defence |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 e4 d6 5 Bg5 | E70 | Queen's Pawn-King's Indian Defence-Normal Variation-Accelerated Averbakh System |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 e4 d6 5 f3 | E80 | Queen's Pawn-King's Indian Defence-Normal Variation-Sämisch Variation |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 e4 d6 5 f3 0-0 | E81 | Queen's Pawn-King's Indian Defence-Normal Variation-Sämisch Variation |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 e4 d6 5 f3 0-0 6 Be3 b6 | E82 | King's Indian Defence-Normal Variation-Sämisch Variation-Double Fianchetto Variation |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 e4 d6 5 f3 0-0 6 Be3 c6 7 Bd3 a6 | E81 | King's Indian Defence-Normal Variation-Sämisch Variation-Byrne Defence |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 e4 d6 5 f3 0-0 6 Be3 e5 | E85 | King's Indian Defence-Normal Variation-Sämisch Variation-Orthodox Variation |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 e4 d6 5 f3 0-0 6 Be3 e5 7 d5 | E87 | King's Indian Defence-Sämisch Variation-Orthodox Variation-Closed Variation |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 e4 d6 5 f3 0-0 6 Be3 e5 7 d5 c6 | E88 | King's Indian Defence-Sämisch Variation-Orthodox Variation-Closed Variation |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 e4 d6 5 f3 0-0 6 Be3 e5 7 d5 c6 8 Nge2 (cxd5) | E89 | King's Indian Defence-Orthodox Variation-Closed Variation-Main Line |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 e4 d6 5 f3 0-0 6 Be3 e5 7 d5 Nh5 8 Qd2 Qh4+ 9 g3 Nxg3 10 Qf2 Nxf1 11 Qxh4 Nxe3 12 Ke2 (Nxc4) | E87 | King's Indian Defence-Orthodox Variation-Closed Variation-Bronstein Defence |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 e4 d6 5 f3 0-0 6 Be3 e5 7 Nge2 c6 | E86 | King's Indian Defence-Normal Variation-Sämisch Variation-Orthodox Variation |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 e4 d6 5 f3 0-0 6 Be3 Nc6 | E83 | King's Indian Defence-Normal Variation-Sämisch Variation-Yates Defence |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 e4 d6 5 f3 0-0 6 Be3 Nc6 7 Nge2 a6 | E83 | King's Indian Defence-Sämisch Variation-Yates Defence-Panno Formation |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 e4 d6 5 f3 0-0 6 Be3 Nc6 7 Nge2 a6 8 Qd2 Rb8 | E84 | King's Indian Defence-Sämisch Variation-Yates Defence-Panno-Ruban Formation |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 e4 d6 5 f3 0-0 6 Be3 Nc6 7 Nge2 Rb8 | E83 | King's Indian Defence-Sämisch Variation-Yates Defence-Ruban Variation |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 e4 d6 5 f3 0-0 6 Bg5 | E81 | King's Indian Defence-Normal Variation-Sämisch Variation-Steiner Attack |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 e4 d6 5 f3 0-0 6 Nge2 | E81 | King's Indian Defence-Normal Variation-Sämisch Variation-Bobotsov-Korchnoi-Petrosian Variation |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 e4 d6 5 f3 c6 | E80 | King's Indian Defence-Normal Variation-Sämisch Variation-Accelerated Byrne Variation |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 e4 d6 5 f3 e5 6 d5 Nh5 7 Be3 Na6 8 Qd2 Qh4+ 9 g3 Nxg3 10 Qf2 Nxf1 11 Qxh4 Nxe3 12 Kf2 Nxc4 | E80 | King's Indian Defence-Normal Variation-Sämisch Variation-Bronstein Variation |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 e4 d6 5 f4 | E76 | Queen's Pawn-King's Indian Defence-Normal Variation-4 Pawns Attack |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 e4 d6 5 f4 0-0 6 Be2 | E77 | Queen's Pawn-King's Indian Defence-Normal Variation-4 Pawns Attack |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 e4 d6 5 f4 0-0 6 Be2 c5 7 d5 e6 8 dxe6 fxe6 9 g4 Nc6 10 h4 | E77 | Queen's Pawn-King's Indian Defence-Normal Variation-6 Pawns Attack |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 e4 d6 5 f4 0-0 6 Be2 c5 7 d5 e6 8 Nf3 exd5 9 e5 | E77 | King's Indian Defence-Normal Variation-4 Pawns Attack-Florentine Gambit |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 e4 d6 5 f4 0-0 6 Be2 c5 7 Nf3 | E78 | King's Indian Defence-Normal Variation-4 Pawns Attack-Fluid Attack |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 e4 d6 5 f4 0-0 6 Be2 c5 7 Nf3 cxd4 8 Nxd4 Nc6 9 Be3 | E79 | King's Indian Defence-4 Pawns Attack-Fluid Attack-Exchange Variation |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 e4 d6 5 f4 0-0 6 Nf3 c5 7 d5 | E76 | King's Indian Defence-Normal Variation-4 Pawns Attack-Dynamic Attack |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 e4 d6 5 f4 Na6 | E76 | King's Indian Defence-Normal Variation-4 Pawns Attack-Modern Defence |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 e4 d6 5 g3 | E72 | Queen's Pawn-King's Indian Defence-Normal Variation-Deferred Fianchetto Variation |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 e4 d6 5 g3 0-0 6 Bg2 e5 7 Nge2 | E72 | King's Indian Defence-Normal Variation-Deferred Fianchetto Variation-Pomar System |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 e4 d6 5 g3 0-0 6 Bg2 Nc6 | E72 | King's Indian Defence-Normal Variation-Deferred Fianchetto Variation-Panno Variation |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 e4 d6 5 h3 | E71 | Queen's Pawn-King's Indian Defence-Normal Variation-Makagonov System |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 e4 d6 5 Nf3 | E90 | Queen's Pawn-King's Indian Defence-Normal Variation-Rare Defence |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 e4 d6 5 Nf3 0-0 6 Be2 | E91 | Queen's Pawn-King's Indian Defence-Normal Variation-Rare Defence (Orthodox/Classical Variation) |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 e4 d6 5 Nf3 0-0 6 Be2 e5 | E92 | King's Indian Defence-Normal Variation-Rare Defence-Classical Variation |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 e4 d6 5 Nf3 0-0 6 Be2 e5 7 0-0 | E94 | King's Indian Defence-Rare Defence-Classical Variation-Orthodox/Modern Variation |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 e4 d6 5 Nf3 0-0 6 Be2 e5 7 0-0 a5 | E94 | King's Indian Defence-Classical Variation-Orthodox Variation-Ukranian Defence |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 e4 d6 5 Nf3 0-0 6 Be2 e5 7 0-0 c6 | E94 | King's Indian Defence-Classical Variation-Orthodox Variation-Donner Defence |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 e4 d6 5 Nf3 0-0 6 Be2 e5 7 0-0 Na6 | E94 | King's Indian Defence-Classical Variation-Orthodox Variation-Glek Defence |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 e4 d6 5 Nf3 0-0 6 Be2 e5 7 0-0 Nbd7 | E94 | King's Indian Defence-Classical Variation-Orthodox Variation-Positional Defence |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 e4 d6 5 Nf3 0-0 6 Be2 e5 7 0-0 Nbd7 8 d5 | E94 | King's Indian Defence-Orthodox Variation-Positional Defence-Closed Line |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 e4 d6 5 Nf3 0-0 6 Be2 e5 7 0-0 Nbd7 8 Re1 | E95 | King's Indian Defence-Classical Variation-Orthodox Variation-Positional Defence |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 e4 d6 5 Nf3 0-0 6 Be2 e5 7 0-0 Nbd7 8 Re1 c6 9 Bf1 a5 | E96 | King's Indian Defence-Orthodox Variation-Positional Defence-Main Line |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 e4 d6 5 Nf3 0-0 6 Be2 e5 7 0-0 Nc6 | E97 | King's Indian Defence-Classical Variation-Orthodox Variation-Aronin-Taimanov/Yugoslav/Mar Del Plata Attack |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 e4 d6 5 Nf3 0-0 6 Be2 e5 7 0-0 Nc6 8 d5 Ne7 9 b4 | E97 | King's Indian Defence-Orthodox Variation-Aronin-Taimanov Attack-Bayonet/Taimanov Attack |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 e4 d6 5 Nf3 0-0 6 Be2 e5 7 0-0 Nc6 8 d5 Ne7 9 b4 Nh5 10 Qc2 | E97 | King's Indian Defence-Aronin-Taimanov Attack-Bayonet Attack-Yepishin's Line |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 e4 d6 5 Nf3 0-0 6 Be2 e5 7 0-0 Nc6 8 d5 Ne7 9 b4 Nh5 10 Re1 | E97 | King's Indian Defence-Aronin-Taimanov Attack-Bayonet Attack-Sokolov's Line |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 e4 d6 5 Nf3 0-0 6 Be2 e5 7 0-0 Nc6 8 d5 Ne7 9 Bd2 | E97 | King's Indian Defence-Orthodox Variation-Aronin-Taimanov Attack-Korchnoi Attack |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 e4 d6 5 Nf3 0-0 6 Be2 e5 7 0-0 Nc6 8 d5 Ne7 9 Nd2 | E97 | King's Indian Defence-Orthodox Variation-Aronin-Taimanov Attack-Modern System |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 e4 d6 5 Nf3 0-0 6 Be2 e5 7 0-0 Nc6 8 d5 Ne7 9 Ne1 | E98 | King's Indian Defence-Classical Variation-Orthodox Variation-Aronin-Taimanov Attack |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 e4 d6 5 Nf3 0-0 6 Be2 e5 7 0-0 Nc6 8 d5 Ne7 9 Ne1 Nd7 10 Be3 | E99 | King's Indian Defence-Orthodox Variation-Aronin-Taimanov Attack-Neo-Classical Line |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 e4 d6 5 Nf3 0-0 6 Be2 e5 7 0-0 Nc6 8 d5 Ne7 9 Ne1 Nd7 10 Be3 f5 11 f3 f4 12 Bf2 g5 13 Rc1 Ng6 14 c5 | E99 | King's Indian Defence-Orthodox Variation-Aronin-Taimanov Attack-Kozul Gambit |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 e4 d6 5 Nf3 0-0 6 Be2 e5 7 0-0 Nc6 8 d5 Ne7 9 Ne1 Nd7 10 f3 f5 | E99 | King's Indian Defence-Orthodox Variation-Aronin-Taimanov Attack-Main/Traditional Line |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 e4 d6 5 Nf3 0-0 6 Be2 e5 7 0-0 Nc6 8 d5 Ne7 9 Ne1 Nd7 10 f3 f5 11 g4 | E99 | King's Indian Defence-Aronin-Taimanov Attack-Traditional Line-Benko Attack |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 e4 d6 5 Nf3 0-0 6 Be2 e5 7 Be3 | E92 | King's Indian Defence-Rare Defence-Classical Variation-Gligoric-Taimanov System |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 e4 d6 5 Nf3 0-0 6 Be2 e5 7 d5 | E92 | King's Indian Defence-Rare Defence-Classical Variation-Petrosian System |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 e4 d6 5 Nf3 0-0 6 Be2 e5 7 d5 a5 | E92 | King's Indian Defence-Classical Variation-Petrosian System-Stein Defence |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 e4 d6 5 Nf3 0-0 6 Be2 e5 7 d5 Nbd7 | E93 | King's Indian Defence-Classical Variation-Petrosian System-Main/Normal Line |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 e4 d6 5 Nf3 0-0 6 Be2 e5 7 d5 Nbd7 8 Bg5 h6 9 Bh4 g5 10 Bg3 Nh5 11 h4 | E93 | King's Indian Defence-Petrosian System-Main Line-Keres Defence |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 e4 d6 5 Nf3 0-0 6 Be2 e5 7 dxe5 | E92 | King's Indian Defence-Rare Defence-Classical Variation-Andersson/Exchange Variation |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 e4 d6 5 Nf3 0-0 6 Be2 Na6 | E91 | King's Indian Defence-Normal Variation-Rare Defence-Kazakh Variation |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 e4 d6 5 Nf3 0-0 6 Be3 | E90 | King's Indian Defence-Normal Variation-Rare Defence-Larsen Variation |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 e4 d6 5 Nf3 0-0 6 Bg5 | E90 | King's Indian Defence-Normal Variation-Rare Defence-Zinnowitz Variation |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 e4 d6 5 Nge2 | E70 | Queen's Pawn-King's Indian Defence-Normal Variation-Kramer System |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 Nf3 d6 5 Bg5 | E61 | Queen's Pawn-King's Indian Defence-Smyslov System Deferred |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 Nf3 d6 5 g3 | E62 | Queen's Pawn-King's Indian Defence-Delayed Fianchetto Variation |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 Nf3 d6 5 g3 0-0 6 Bg2 c5 | E64 | Queen's Pawn-King's Indian Defence-Delayed Fianchetto Variation-Yugoslav System |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 Nf3 d6 5 g3 0-0 6 Bg2 c5 7 0-0 | E65 | Queen's Pawn-King's Indian Defence-Delayed Fianchetto Variation-Yugoslav System |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 Nf3 d6 5 g3 0-0 6 Bg2 c5 7 0-0 Nc6 8 d5 | E66 | King's Indian Defence-Delayed Fianchetto Variation-Yugoslav System-Panno-Yugoslav/Advance Line |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 Nf3 d6 5 g3 0-0 6 Bg2 c5 7 0-0 Nc6 8 dxc5 dxc5 | E66 | King's Indian Defence-Delayed Fianchetto Variation-Yugoslav System-Exchange Line |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 Nf3 d6 5 g3 0-0 6 Bg2 c6 7 0-0 Bf5 | E62 | Queen's Pawn-King's Indian Defence-Delayed Fianchetto Variation-Larsen System |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 Nf3 d6 5 g3 0-0 6 Bg2 c6 7 0-0 Qa5 | E62 | Queen's Pawn-King's Indian Defence-Delayed Fianchetto Variation-Kavalek/Bronstein Defence |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 Nf3 d6 5 g3 0-0 6 Bg2 c6 7 0-0 Qb6 | E62 | Queen's Pawn-King's Indian Defence-Delayed Fianchetto Variation-Benjamin Defence |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 Nf3 d6 5 g3 0-0 6 Bg2 Nbd7 | E67 | Queen's Pawn-King's Indian Defence-Delayed Fianchetto Variation-Debrecen Defence |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 Nf3 d6 5 g3 0-0 6 Bg2 Nbd7 7 0-0 e5 | E67 | King's Indian Defence-Delayed Fianchetto Variation-Debrecen Defence-Classical Fianchetto Variation |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 Nf3 d6 5 g3 0-0 6 Bg2 Nbd7 7 0-0 e5 8 e4 | E68 | King's Indian Defence-Delayed Fianchetto Variation-Debrecen Defence-Classical Fianchetto Variation |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 Nf3 d6 5 g3 0-0 6 Bg2 Nbd7 7 0-0 e5 8 e4 c6 9 h3 | E69 | King's Indian Defence-Debrecen Defence-Classical Fianchetto Variation-Classical Main Line |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 Nf3 d6 5 g3 0-0 6 Bg2 Nbd7 7 0-0 e5 8 e4 Re8 9 h3 exd4 10 Nxd4 Nc5 11 Re1 a5 | E68 | King's Indian Defence-Debrecen Defence-Classical Fianchetto Variation-Long Variation |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 Nf3 d6 5 g3 0-0 6 Bg2 Nc6 | E62 | Queen's Pawn-King's Indian Defence-Delayed Fianchetto Variation-Karlsbad Variation |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 Nf3 d6 5 g3 0-0 6 Bg2 Nc6 7 0-0 a6 | E63 | King's Indian Defence-Delayed Fianchetto Variation-Karlsbad Variation-Panno Variation |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 Nf3 d6 5 g3 0-0 6 Bg2 Nc6 7 0-0 a6 8 d5 Na5 9 Nd2 c5 10 Qc2 e5 | E63 | King's Indian Defence-Karlsbad Variation-Panno Variation-Blockade Line |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 Nf3 d6 5 g3 0-0 6 Bg2 Nc6 7 0-0 a6 8 d5 Na5 9 Nd2 c5 10 Qc2 Rb8 11 b3 b5 12 Bb2 bxc4 13 bxc4 Bh6 | E63 | King's Indian Defence-Karlsbad Variation-Panno Variation-Donner Line |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 Nf3 d6 5 g3 0-0 6 Bg2 Nc6 7 0-0 a6 8 h3 Rb8 9 Be3 b5 10 Nd2 | E63 | King's Indian Defence-Karlsbad Variation-Panno Variation-Korchnoi Line |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 Nf3 d6 5 g3 0-0 6 Bg2 Nc6 7 0-0 Bf5 | E62 | King's Indian Defence-Delayed Fianchetto Variation-Karlsbad Variation-Lesser Simagin/Spassky Variation |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 Nf3 d6 5 g3 0-0 6 Bg2 Nc6 7 0-0 Bg4 | E62 | King's Indian Defence-Delayed Fianchetto Variation-Karlsbad Variation-Simagin Variation |
| 1 d4 Nf6 2 c4 g6 3 Nc3 Bg7 4 Nf3 d6 5 g3 0-0 6 Bg2 Nc6 7 0-0 e5 | E62 | King's Indian Defence-Delayed Fianchetto Variation-Karlsbad Variation-Uhlmann-Szabó System |
| 1 d4 Nf6 2 c4 g6 3 Nc3 d5 | D80 | Queen's Pawn-King's Indian Defence-Grünfeld/Classical Defence |
| 1 d4 Nf6 2 c4 g6 3 Nc3 d5 4 Bf4 | D82 | Queen's Pawn-King's Indian Defence-Grünfeld Defence-Brinckmann/Sämisch Attack |
| 1 d4 Nf6 2 c4 g6 3 Nc3 d5 4 Bf4 Bg7 | D82 | Queen's Pawn-King's Indian Defence-Grünfeld Defence-Sämisch Attack-Landau Variation |
| 1 d4 Nf6 2 c4 g6 3 Nc3 d5 4 Bf4 Bg7 5 e3 0-0 | D83 | King's Indian Defence-Brinckmann Attack-Landau Variation-Grünfeld Gambit |
| 1 d4 Nf6 2 c4 g6 3 Nc3 d5 4 Bf4 Bg7 5 e3 0-0 6 cxd5 Nxd5 (7 Nxd5 Qxd5 8 Bxc7) | D84 | King's Indian Defence-Brinckmann Attack-Landau Variation-Grünfeld Gambit Accepted |
| 1 d4 Nf6 2 c4 g6 3 Nc3 d5 4 Bf4 Bg7 5 e3 0-0 6 Rc1 | D83 | King's Indian Defence-Landau Variation-Grünfeld Gambit-Capablanca Variation |
| 1 d4 Nf6 2 c4 g6 3 Nc3 d5 4 Bf4 Bg7 5 e3 0-0 6 Rc1 c5 7 dxc5 Be6 | D83 | King's Indian Defence-Grünfeld Gambit-Capablanca Variation-Botvinnik Variation |
| 1 d4 Nf6 2 c4 g6 3 Nc3 d5 4 Bf4 Bg7 5 e3 0-0 6 Rc1 c5 7 dxc5 Qa5 | D83 | King's Indian Defence-Grünfeld Gambit-Capablanca Variation-Reshevsky Gambit |
| 1 d4 Nf6 2 c4 g6 3 Nc3 d5 4 Bg5 | D80 | Queen's Pawn-King's Indian Defence-Grünfeld Defence-Stockholm Variation |
| 1 d4 Nf6 2 c4 g6 3 Nc3 d5 4 Bg5 Ne4 5 Nxe4 dxe4 6 Qd2 c5 | D80 | King's Indian Defence-Grünfeld Defence-Stockholm Variation-Lundin Variation |
| 1 d4 Nf6 2 c4 g6 3 Nc3 d5 4 cxd5 Nxd5 | D85 | Queen's Pawn-King's Indian Defence-Grünfeld Defence-Exchange Variation |
| 1 d4 Nf6 2 c4 g6 3 Nc3 d5 4 cxd5 Nxd5 5 e4 Nxc3 6 bxc3 Bg7 7 Bc4 | D86 | King's Indian Defence-Grünfeld Defence-Exchange Variation-Classical Variation |
| 1 d4 Nf6 2 c4 g6 3 Nc3 d5 4 cxd5 Nxd5 5 e4 Nxc3 6 bxc3 Bg7 7 Bc4 0-0 8 Ne2 b6 | D86 | Grünfeld Defence-Exchange Variation-Classical Variation-Simagin's Lesser Variation |
| 1 d4 Nf6 2 c4 g6 3 Nc3 d5 4 cxd5 Nxd5 5 e4 Nxc3 6 bxc3 Bg7 7 Bc4 0-0 8 Ne2 b6 9 h4 Ba6 | D86 | Grünfeld Defence-Exchange Variation-Classical Variation-Simagin's Variation |
| 1 d4 Nf6 2 c4 g6 3 Nc3 d5 4 cxd5 Nxd5 5 e4 Nxc3 6 bxc3 Bg7 7 Bc4 0-0 8 Ne2 c5 | D87 | Grünfeld Defence-Exchange Variation-Classical Variation-Spassky Variation |
| 1 d4 Nf6 2 c4 g6 3 Nc3 d5 4 cxd5 Nxd5 5 e4 Nxc3 6 bxc3 Bg7 7 Bc4 0-0 8 Ne2 c5 9 0-0 Nc6 10 Be3 Bg4 11 f3 Na5 12 Bxf7+ | D87 | Grünfeld Defence-Classical Variation-Spassky Variation-Seville Variation |
| 1 d4 Nf6 2 c4 g6 3 Nc3 d5 4 cxd5 Nxd5 5 e4 Nxc3 6 bxc3 Bg7 7 Bc4 0-0 8 Ne2 c5 9 0-0 Nc6 10 Be3 cxd4 | D87/D88 | Grünfeld Defence-Exchange Variation-Classical Variation-Spassky Variation |
| 1 d4 Nf6 2 c4 g6 3 Nc3 d5 4 cxd5 Nxd5 5 e4 Nxc3 6 bxc3 Bg7 7 Bc4 0-0 8 Ne2 c5 9 0-0 Nc6 10 Be3 cxd4 11 cxd4 | D88 | Grünfeld Defence-Classical Variation-Spassky Variation-Main Line |
| 1 d4 Nf6 2 c4 g6 3 Nc3 d5 4 cxd5 Nxd5 5 e4 Nxc3 6 bxc3 Bg7 7 Bc4 0-0 8 Ne2 c5 9 0-0 Nc6 10 Be3 cxd4 11 cxd4 Bg4 12 f3 Na5 13 Bd3 (Be6) | D89 | Grünfeld Defence-Classical Variation-Spassky Variation-Main Line |
| 1 d4 Nf6 2 c4 g6 3 Nc3 d5 4 cxd5 Nxd5 5 e4 Nxc3 6 bxc3 Bg7 7 Bc4 0-0 8 Ne2 c5 9 0-0 Nc6 10 Be3 cxd4 11 cxd4 Bg4 12 f3 Na5 13 Bd3 Be6 14 d5 | D89 | Grünfeld Defence-Spassky Variation-Main Line-Sokolsky Variation |
| 1 d4 Nf6 2 c4 g6 3 Nc3 d5 4 cxd5 Nxd5 5 e4 Nxc3 6 bxc3 Bg7 7 Bc4 0-0 8 Ne2 c5 9 0-0 Nc6 10 Be3 cxd4 11 cxd4 Bg4 12 f3 Na5 13 Rc1 | D88 | Grünfeld Defence-Spassky Variation-Main Line-Alekhine Variation |
| 1 d4 Nf6 2 c4 g6 3 Nc3 d5 4 cxd5 Nxd5 5 e4 Nxc3 6 bxc3 Bg7 7 Bc4 0-0 8 Ne2 Nc6 | D86 | Grünfeld Defence-Exchange Variation-Classical Variation-Simagin's Improved Variation |
| 1 d4 Nf6 2 c4 g6 3 Nc3 d5 4 cxd5 Nxd5 5 e4 Nxc3 6 bxc3 Bg7 7 Bc4 0-0 8 Ne2 Qd7 (9 0-0 b6) | D86 | Grünfeld Defence-Exchange Variation-Classical Variation-Larsen Variation |
| 1 d4 Nf6 2 c4 g6 3 Nc3 d5 4 cxd5 Nxd5 5 e4 Nxc3 6 bxc3 Bg7 7 Nf3 | D85 | Queen's Pawn-King's Indian Defence-Grünfeld Defence-Modern Exchange Variation |
| 1 d4 Nf6 2 c4 g6 3 Nc3 d5 4 cxd5 Nxd5 5 e4 Nxc3 6 bxc3 Bg7 7 Nf3 c5 8 h3 | D85 | King's Indian Defence-Grünfeld Defence-Modern Exchange Variation-Kramnik's Line |
| 1 d4 Nf6 2 c4 g6 3 Nc3 d5 4 cxd5 Nxd5 5 e4 Nxc3 6 bxc3 Bg7 7 Nf3 c5 8 Rb1 0-0 9 Be2 Nc6 10 d5 Bxc3+ | D85 | King's Indian Defence-Grünfeld Defence-Modern Exchange Variation-Pawn Grab Line |
| 1 d4 Nf6 2 c4 g6 3 Nc3 d5 4 cxd5 Nxd5 5 g3 | D85 | King's Indian Defence-Grünfeld Defence-Exchange Variation-Kemeri Variation |
| 1 d4 Nf6 2 c4 g6 3 Nc3 d5 4 cxd5 Nxd5 5 Na4 | D85 | King's Indian Defence-Grünfeld Defence-Exchange Variation-Nadanian Attack |
| 1 d4 Nf6 2 c4 g6 3 Nc3 d5 4 e3 c6 | D80 | Queen's Pawn-King's Indian Defence-Grünfeld Defence-Schlechter Variation |
| 1 d4 Nf6 2 c4 g6 3 Nc3 d5 4 f3 | D80 | Queen's Pawn-King's Indian Defence-Grünfeld Defence-Lutikov Variation |
| 1 d4 Nf6 2 c4 g6 3 Nc3 d5 4 f3 c5 5 cxd5 Nxd5 6 Na4 | D80 | King's Indian Defence-Grünfeld Defence-Lutikov Variation-Murey Attack |
| 1 d4 Nf6 2 c4 g6 3 Nc3 d5 4 g3 | D80 | Queen's Pawn-King's Indian Defence-Grünfeld Defence-Kemeri Variation |
| 1 d4 Nf6 2 c4 g6 3 Nc3 d5 4 g4 | D80 | Queen's Pawn-King's Indian Defence-Grünfeld Defence-Spike/Gibbon Gambit |
| 1 d4 Nf6 2 c4 g6 3 Nc3 d5 4 h4 | D80 | Queen's Pawn-King's Indian Defence-Grünfeld Defence-Zaitsev Gambit |
| 1 d4 Nf6 2 c4 g6 3 Nc3 d5 4 Nf3 | D90 | Queen's Pawn-King's Indian Defence-Grünfeld Defence-3 Knights Variation |
| 1 d4 Nf6 2 c4 g6 3 Nc3 d5 4 Nf3 Bg7 5 Bf4 | D92 | King's Indian Defence-Grünfeld Defence-3 Knights Variation-Hungarian Attack |
| 1 d4 Nf6 2 c4 g6 3 Nc3 d5 4 Nf3 Bg7 5 Bf4 0-0 6 e3 | D93 | King's Indian Defence-Grünfeld Defence-3 Knights Variation-Hungarian Attack |
| 1 d4 Nf6 2 c4 g6 3 Nc3 d5 4 Nf3 Bg7 5 Bg5 | D91 | King's Indian Defence-Grünfeld Defence-3 Knights Variation-Petrosian System |
| 1 d4 Nf6 2 c4 g6 3 Nc3 d5 4 Nf3 Bg7 5 cxd5 | D90 | King's Indian Defence-Grünfeld Defence-3 Knights Variation-Exchange Variation |
| 1 d4 Nf6 2 c4 g6 3 Nc3 d5 4 Nf3 Bg7 5 e3 | D94 | King's Indian Defence-Grünfeld Defence-3 Knights Variation-Burille Variation |
| 1 d4 Nf6 2 c4 g6 3 Nc3 d5 4 Nf3 Bg7 5 e3 0-0 6 b4 | D94 | King's Indian Defence-3 Knights Variation-Burille Variation-Makogonov Variation |
| 1 d4 Nf6 2 c4 g6 3 Nc3 d5 4 Nf3 Bg7 5 e3 0-0 6 Bd2 | D94 | King's Indian Defence-3 Knights Variation-Burille Variation-Opocensky Variation |
| 1 d4 Nf6 2 c4 g6 3 Nc3 d5 4 Nf3 Bg7 5 e3 0-0 6 Bd3 | D94 | King's Indian Defence-3 Knights Variation-Burille Variation-Paris Variation |
| 1 d4 Nf6 2 c4 g6 3 Nc3 d5 4 Nf3 Bg7 5 e3 0-0 6 Bd3 c6 | D94 | King's Indian Defence-Burille Variation-Paris Variation-Schlechter Variation Deferred |
| 1 d4 Nf6 2 c4 g6 3 Nc3 d5 4 Nf3 Bg7 5 e3 0-0 6 Bd3 c6 7 0-0 Bf5 | D94 | King's Indian Defence-Paris Variation-Schlechter Variation Deferred-Flohr Defence |
| 1 d4 Nf6 2 c4 g6 3 Nc3 d5 4 Nf3 Bg7 5 e3 0-0 6 Bd3 c6 7 0-0 Bg4 | D94 | King's Indian Defence-Paris Variation-Schlechter Variation Deferred-Smyslov Defence |
| 1 d4 Nf6 2 c4 g6 3 Nc3 d5 4 Nf3 Bg7 5 e3 0-0 6 cxd5 | D94 | Grünfeld Defence-3 Knights Variation-Burille Variation-Closed Variation |
| 1 d4 Nf6 2 c4 g6 3 Nc3 d5 4 Nf3 Bg7 5 e3 0-0 6 Qb3 | D95 | King's Indian Defence-3 Knights Variation-Burille Variation-Vienna Variation |
| 1 d4 Nf6 2 c4 g6 3 Nc3 d5 4 Nf3 Bg7 5 e3 0-0 6 Qb3 dxc4 7 Bxc4 Nbd7 8 Ng5 | D95 | King's Indian Defence-Burille Variation-Vienna Variation-Pachman Variation |
| 1 d4 Nf6 2 c4 g6 3 Nc3 d5 4 Nf3 Bg7 5 e3 0-0 6 Qb3 e6 | D95 | King's Indian Defence-Burille Variation-Vienna Variation-Botvinnik Variation |
| 1 d4 Nf6 2 c4 g6 3 Nc3 d5 4 Nf3 Bg7 5 e3 c5 6 Be2 cxd4 7 exd4 Nc6 8 0-0 0-0 | D94 | King's Indian Defence-3 Knights Variation-Burille Variation-Reversed Tarrasch Variation |
| 1 d4 Nf6 2 c4 g6 3 Nc3 d5 4 Nf3 Bg7 5 Qa4+ | D90 | King's Indian Defence-Grünfeld Defence-3 Knights Variation-Flohr Attack |
| 1 d4 Nf6 2 c4 g6 3 Nc3 d5 4 Nf3 Bg7 5 Qb3 | D96 | King's Indian Defence-Grünfeld Defence-3 Knights Variation-Russian Variation |
| 1 d4 Nf6 2 c4 g6 3 Nc3 d5 4 Nf3 Bg7 5 Qb3 dxc4 6 Qxc4 0-0 7 e4 | D97 | King's Indian Defence-Grünfeld Defence-3 Knights Variation-Russian Variation |
| 1 d4 Nf6 2 c4 g6 3 Nc3 d5 4 Nf3 Bg7 5 Qb3 dxc4 6 Qxc4 0-0 7 e4 a6 | D97 | Grünfeld Defence-3 Knights Variation-Russian Variation-Alekhine/Hungarian Variation |
| 1 d4 Nf6 2 c4 g6 3 Nc3 d5 4 Nf3 Bg7 5 Qb3 dxc4 6 Qxc4 0-0 7 e4 b6 | D97 | Grünfeld Defence-3 Knights Variation-Russian Variation-Levenfish Variation |
| 1 d4 Nf6 2 c4 g6 3 Nc3 d5 4 Nf3 Bg7 5 Qb3 dxc4 6 Qxc4 0-0 7 e4 Bg4 | D98 | Grünfeld Defence-3 Knights Variation-Russian Variation-Smyslov Variation |
| 1 d4 Nf6 2 c4 g6 3 Nc3 d5 4 Nf3 Bg7 5 Qb3 dxc4 6 Qxc4 0-0 7 e4 Bg4 8 Be3 Nfd7 9 Be2 Nb6 10 Qd3 Nc6 11 0-0-0 | D98 | Grünfeld Defence-Russian Variation-Smyslov Variation-Keres Variation |
| 1 d4 Nf6 2 c4 g6 3 Nc3 d5 4 Nf3 Bg7 5 Qb3 dxc4 6 Qxc4 0-0 7 e4 Bg4 8 Be3 Nfd7 9 Qb3 | D99 | Grünfeld Defence-Russian Variation-Smyslov Variation-Main Line |
| 1 d4 Nf6 2 c4 g6 3 Nc3 d5 4 Nf3 Bg7 5 Qb3 dxc4 6 Qxc4 0-0 7 e4 Bg4 8 Be3 Nfd7 9 Qb3 c5 | D99 | Grünfeld Defence-Smyslov Variation-Main Line-Yugoslav Variation |
| 1 d4 Nf6 2 c4 g6 3 Nc3 d5 4 Nf3 Bg7 5 Qb3 dxc4 6 Qxc4 0-0 7 e4 c6 | D97 | Grünfeld Defence-3 Knights Variation-Russian Variation-Szabó/Boleslavsky Variation |
| 1 d4 Nf6 2 c4 g6 3 Nc3 d5 4 Nf3 Bg7 5 Qb3 dxc4 6 Qxc4 0-0 7 e4 Na6 | D97 | Grünfeld Defence-3 Knights Variation-Russian Variation-Prins Variation |
| 1 d4 Nf6 2 c4 g6 3 Nc3 d5 4 Nf3 Bg7 5 Qb3 dxc4 6 Qxc4 0-0 7 e4 Nc6 | D97 | Grünfeld Defence-3 Knights Variation-Russian Variation-Byrne/Simagin Variation |
| 1 d4 Nf6 2 c4 g6 3 Nc3 d5 4 Nf3 c6 | D90 | King's Indian Defence-Grünfeld Defence-3 Knights Variation-Schlechter Variation |
| 1 d4 Nf6 2 c4 g6 3 Nc3 d5 4 Qb3 | D81 | Queen's Pawn-King's Indian Defence-Grünfeld Defence-Semi-Russian/Accelerated Variation |
| 1 d4 Nf6 2 c4 g6 3 Nf3 | E60 | Queen's Pawn-King's Indian Defence-King's Knight Variation |
| 1 d4 Nf6 2 c4 g6 3 Nf3 Bg7 4 b4 | E60 | Queen's Pawn-King's Indian Defence-King's Knight Variation-Santassiere Variation |
| 1 d4 Nf6 2 c4 g6 3 Nf3 Bg7 4 g3 0-0 5 Bg2 d6 6 0-0 Nc6 7 d5 Na5 | E60 | Queen's Pawn-King's Indian Defence-King's Knight Variation-Panno Variation |
| 1 d4 Nf6 2 c4 g6 3 Nf3 Bg7 4 g3 c5 5 Bg2 Qa5+ | E64 | Queen's Pawn-King's Indian Defence-King's Knight Variation-Pterodactyl Variation |
| 1 d4 Nf6 2 c4 g6 3 Nf3 Bg7 4 g3 d6 5 Bg2 0-0 6 0-0 c5 | E64 | Queen's Pawn-King's Indian Defence-King's Knight Variation-Yugoslav System |
| 1 d4 Nf6 2 c4 g6 3 Nf3 Bg7 4 g3 d6 5 Bg2 0-0 6 0-0 Nbd7 7 Nc3 a6 | E64 | Queen's Pawn-King's Indian Defence-King's Knight Variation-Hungarian Variation |
| 1 d4 Nf6 2 c4 g6 3 Nf3 Bg7 4 g3 d6 5 Bg2 0-0 6 0-0 Nbd7 7 Nc3 e5 8 b3 | E64 | Queen's Pawn-King's Indian Defence-King's Knight Variation-Double Fianchetto Attack |
| 1 d4 Nf6 2 c4 g6 3 Nf3 d5 | D70/E60 | Queen's Pawn-King's Indian Defence-King's Knight Variation-Non- or Delayed Fianchetto/Neo-Grünfeld Variation |
| 1 d4 Nf6 2 c4 g6 3 Nf3 d5 4 e3 c6 | D70/E60 | King's Indian Defence-King's Knight Variation-Non- or Delayed Fianchetto-Schlechter Variation |
| 1 d4 Nf6 2 c4 g6 3 Qc2 | E60 | Queen's Pawn-King's Indian Defence-Mengarini Attack |
| 1 d4 Nf6 2 c4 Nc6 | A50 Explore | Queen's Pawn-Indian Defence-Normal Variation-Mexican/Kevitz-Trajkovich Defence |
| 1 d4 Nf6 2 c4 Nc6 3 d5 Ne5 4 f4 | A50 | Indian Defence-Normal Variation-Mexican Defence-Horsefly Gambit |
| 1 d4 Nf6 2 d5 | A45 Explore | Queen's Pawn-Indian Defence-Pawn Push Variation |
| 1 d4 Nf6 2 e4 | A45 Explore | Queen's Pawn-Indian Defence-Omega Gambit |
| 1 d4 Nf6 2 e4 Nxe4 3 Bd3 Nf6 4 Bg5 | A45 | Queen's Pawn-Indian Defence-Omega Gambit-Arafat Gambit |
| 1 d4 Nf6 2 f3 | A45 Explore | Queen's Pawn-Indian Defence-Paleface Attack |
| 1 d4 Nf6 2 f3 d5 3 e4 | A45 | Queen's Pawn-Indian Defence-Paleface Attack-Blackmar-Diemer Gambit Deferred |
| 1 d4 Nf6 2 f3 d5 3 g4 | A45 | Queen's Pawn-Indian Defence-Paleface Attack-Gedult Attack |
| 1 d4 Nf6 2 f4 | A45 Explore | Queen's Pawn-Indian Defence-Canard Opening |
| 1 d4 Nf6 2 g3 | A45 Explore | Queen's Pawn-Indian Defence-Tartakower Attack |
| 1 d4 Nf6 2 g3 e5 | A45 | Queen's Pawn-Indian Defence-Tartakower Attack-Psuedo-Budapest Variation |
| 1 d4 Nf6 2 g4 | A45 Explore | Queen's Pawn-Indian Defence-Bronstein/Gibbins-Wiedenhagen Gambit |
| 1 d4 Nf6 2 g4 e5 | A45 | Queen's Pawn-Indian Defence-Bronstein Gambit-Oshima Defence |
| 1 d4 Nf6 2 g4 Nxg4 | A45 | Queen's Pawn-Indian Defence-Bronstein Gambit Accepted |
| 1 d4 Nf6 2 g4 Nxg4 3 e4 d6 4 Be2 Nf6 5 Nc3 | A45 | Queen's Pawn-Indian Defence-Bronstein Gambit Accepted-Stummer Gambit |
| 1 d4 Nf6 2 g4 Nxg4 3 f3 Nf6 4 e4 | A45 | Queen's Pawn-Indian Defence-Bronstein Gambit Accepted-Maltese Falcon |
| 1 d4 Nf6 2 Nc3 c5 | A45 | Queen's Pawn-Indian Defence-Reversed Chigorin Defence |
| 1 d4 Nf6 2 Nc3 c5 3 dxc5 | A45 | Queen's Pawn-Indian Defence-Reversed Chigorin Defence-von Beivorseen Variation |
| 1 d4 Nf6 2 Nc3 d5 3 Bg5 c5 4 Bxf6 gxf6 5 e4 dxe4 6 d5 | D00 | Queen's Pawn-Indian Defence-Malich Gambit |
| 1 d4 Nf6 2 Nc3 d5 3 e4 Nxe4 | D00 | Queen's Pawn-Indian Defence-Hübsch Gambit |
| 1 d4 Nf6 2 Nc3 e5 | A45 | Queen's Pawn-Indian Defence-Maddigan Gambit |
| 1 d4 Nf6 2 Nd2 e5 | A45 | Queen's Pawn-Indian Defence-Lazard Gambit |
| 1 d4 Nf6 2 Nf3 | A46 Explore | Queen's Pawn-Indian Defence-Torre/Knights Attack |
| 1 d4 Nf6 2 Nf3 a6 | A46 | Queen's Pawn-Indian Defence-Torre Attack-Alburt-Miles Variation |
| 1 d4 Nf6 2 Nf3 b5 | A46 | Queen's Pawn-Indian Defence-Torre Attack-Polish Variation |
| 1 d4 Nf6 2 Nf3 b6 | A47 | Queen's Pawn-Pseudo-Queen's Indian/Capablanca Defence |
| 1 d4 Nf6 2 Nf3 b6 3 Bg5 | A47 | Queen's Pawn-Torre Attack-Pseudo-Queen's Indian Defence-Torre Variation |
| 1 d4 Nf6 2 Nf3 b6 3 c3 e5 | A47 | Queen's Pawn-Pseudo-Queen's Indian Defence-Schnepper Gambit |
| 1 d4 Nf6 2 Nf3 b6 3 g3 Bb7 4 Bg2 c5 | A47 | Queen's Pawn-Pseudo-Queen's Indian Defence-Marienbad System |
| 1 d4 Nf6 2 Nf3 b6 3 g3 Bb7 4 Bg2 c5 5 c4 cxd4 6 Qxd4 | A47 | Queen's Pawn-Pseudo-Queen's Indian Defence-Marienbad System-Berg Variation |
| 1 d4 Nf6 2 Nf3 c5 | A46 | Queen's Pawn-Indian Defence-Torre Attack-Spielmann-Indian Variation |
| 1 d4 Nf6 2 Nf3 c5 3 d5 b5 | A46 | Indian Defence-Torre Attack-Spielmann-Indian Variation-Pseudo-Benko Variation |
| 1 d4 Nf6 2 Nf3 c6 | A46 | Queen's Pawn-Indian Defence-Torre Attack-Czech-Indian Defence |
| 1 d4 Nf6 2 Nf3 d6 | A46 | Queen's Pawn-Indian Defence-Torre Attack-Wade-Tarkatower Defence |
| 1 d4 Nf6 2 Nf3 e6 3 Bf4 | A46 | Queen's Pawn-Indian Defence-Torre Attack-London System |
| 1 d4 Nf6 2 Nf3 e6 3 Bg5 | A46 | Queen's Pawn-Indian Defence-Torre Attack-Classical Defence |
| 1 d4 Nf6 2 Nf3 e6 3 Bg5 c5 4 e3 b6 5 d5 | A46 | Indian Defence-Torre Attack-Classical Defence-Petrosian Gambit |
| 1 d4 Nf6 2 Nf3 e6 3 Bg5 c5 4 e4 | A46 | Indian Defence-Torre Attack-Classical Defence-Wagner Gambit |
| 1 d4 Nf6 2 Nf3 e6 3 Bg5 h6 | A46 | Indian Defence-Torre Attack-Classical Defence-Nimzowitsch Variation |
| 1 d4 Nf6 2 Nf3 e6 3 e3 | A46 | Queen's Pawn-Indian Defence-Torre Attack-Yusupov-Rubinstein System |
| 1 d4 Nf6 2 Nf3 g6 | A48 | Queen's Pawn-Pseudo-King's Indian/East Indian Defence |
| 1 d4 Nf6 2 Nf3 g6 3 Bf4 | A48 | Queen's Pawn-Pseudo-King's Indian Defence-London System |
| 1 d4 Nf6 2 Nf3 g6 3 Bg5 | A48 | Queen's Pawn-Pseudo-King's Indian Defence-Fianchetto/Torre Defence |
| 1 d4 Nf6 2 Nf3 g6 3 Bg5 Bg7 4 Nbd2 c5 | A48 | Queen's Pawn-Pseudo-King's Indian Defence-Fianchetto Defence-Euwe Variation |
| 1 d4 Nf6 2 Nf3 g6 3 e3 Bg7 4 Bd3 d5 | A48 | Queen's Pawn-Pseudo-King's Indian Defence-Colle System-Gruenfeld Formation |
| 1 d4 Nf6 2 Nf3 g6 3 e3 Bg7 4 Bd3 d6 | A48 | Queen's Pawn-Pseudo-King's Indian Defence-Colle System-King's Indian Variation |
| 1 d4 Nf6 2 Nf3 g6 3 g3 | A49 | Queen's Pawn-Pseudo-King's Indian Defence-Fianchetto/Przepiorka Variation |
| 1 d4 Nf6 2 Nf3 g6 3 Nc3 d5 4 Bf4 Bg7 5 e3 0-0 6 Be2 | D02 | Indian Defence-Torre Attack-Barry Attack-Gruenfeld Variation |
| 1 d4 Nf6 2 Nf3 Ne4 | A46 | Queen's Pawn-Indian Defence-Torre Attack-Döry Defence |
| 1 e3 | A00 Explore | Van't Kruijs Opening |
| 1 e3 d5 2 Nc3 Nf6 3 a3 e5 4 f4 exf4 5 Nf3 | A00 | Van't Kruijs Opening-Keoni-Hiva Gambit Delayed |
| 1 e3 e5 2 Bc4 b5 3 Bb3 | A00 | Van't Kruijs Opening-Bouncing Bishop Variation |
| 1 e3 e5 2 c4 d6 3 Nc3 Nc6 4 b3 Nf6 | A00 | Van't Kruijs Opening-Amsterdam Attack |
| 1 e3 e5 2 Nc3 d5 3 f4 exf4 4 Nf3 | A00 | Van't Kruijs Opening-Keoni-Hiva Gambit-Ekolu Variation |
| 1 e3 e5 2 Nc3 Nc6 3 f4 exf4 4 Nf3 | A00 | Van't Kruijs Opening-Keoni-Hiva Gambit-Alua Variation |
| 1 e3 e5 2 Nc3 Nf6 3 f4 exf4 4 Nf3 | A00 | Van't Kruijs Opening-Keoni-Hiva Gambit-Akahi Variation |
| 1 e4 | B00 Explore | King's Pawn |
| 1 e4 a5 | B00 Explore | King's Pawn-Corn Stalk/Ware Defence |
| 1 e4 a5 2 d4 Nc6 | B00 Explore | King's Pawn-Corn Stalk Defence-Snaglepuss Defence |
| 1 e4 a6 | B00 Explore | King's Pawn-St. George/Baker Defence |
| 1 e4 a6 2 d4 b5 3 Nf3 Bb7 4 Bd3 d6 5 0-0 g6 6 c3 Bg7 | B00 | King's Pawn-St. George Defence-San Jorge Variation |
| 1 e4 a6 2 d4 b5 3 Nf3 Bb7 4 Bd3 d6 5 0-0 Nd7 | B00 | King's Pawn-St. George Defence-San Jorge Defence |
| 1 e4 a6 2 d4 b5 3 Nf3 Bb7 4 Bd3 e6 | B00 | King's Pawn-St. George Defence-Polish Variation |
| 1 e4 a6 2 d4 e5 | B00 Explore | King's Pawn-St. George Defence-Zilbermints Gambit |
| 1 e4 a6 2 d4 e6 | B00 Explore | King's Pawn-St. George Defence-New St. George Variation |
| 1 e4 a6 2 d4 e6 3 c4 | B00 Explore | King's Pawn-St. George Defence-New St. George Variation-3 Pawn Attack |
| 1 e4 a6 2 d4 e6 3 c4 b5 | B00 | St. George Defence-New St. George Variation-3 Pawn Attack-Sanky-Georg Gambit |
| 1 e4 a6 2 d4 e6 3 Nf3 b5 4 Bd3 c5 5 c3 Bb7 6 0-0 Nf6 | B00 | King's Pawn-St. George Defence-New St. George Variation-Traditional Line |
| 1 e4 a6 2 d4 Nc6 | B00 Explore | King's Pawn-St. George Defence-Woodchuck Variation |
| 1 e4 b5 | B00 Explore | King's Pawn-Polish Gambit |
| 1 e4 b6 | B00 Explore | King's Pawn-Owen/Queen's Fianchetto/Greek Defence |
| 1 e4 b6 2 d4 Ba6 | B00 Explore | King's Pawn-Owen Defence-Guatemala Defence |
| 1 e4 b6 2 d4 Bb7 3 Bd3 f5 4 exf5 Bxg2 5 Qh5+ g6 | B00 | King's Pawn-Owen Defence-Matovinsky Gambit |
| 1 e4 b6 2 d4 Bb7 3 Bg5 | B00 | King's Pawn-Owen Defence-Naselwaus Gambit |
| 1 e4 b6 2 d4 Bb7 3 f3 e5 | B00 | King's Pawn-Owen Defence-Wind Gambit |
| 1 e4 b6 2 d4 Bb7 3 Nf3 (Bxe4) | B00 | King's Pawn-Owen Defence-Smith Gambit |
| 1 e4 b6 2 d4 c5 3 dxc5 Nc6 | B00 | King's Pawn-Owen Defence-Hekili-Loa Gambit |
| 1 e4 b6 2 d4 Na6 | B00 Explore | King's Pawn-Owen Defence-Guatemala Defence |
| 1 e4 c5 | B20 Explore | King's Pawn-Sicilian Defence |
| 1 e4 c5 2 a3 | B20 Explore | King's Pawn-Sicilian Defence-Mengarini Variation |
| 1 e4 c5 2 a4 | B20 Explore | King's Pawn-Sicilian Defence-Myers Attack |
| 1 e4 c5 2 b3 | B20 Explore | King's Pawn-Sicilian Defence-Snyder Variation |
| 1 e4 c5 2 b3 b6 | B20 | King's Pawn-Sicilian Defence-Snyder Variation-Queen Fianchetto Variation |
| 1 e4 c5 2 b4 | B20 Explore | King's Pawn-Sicilian Defence-Wing Gambit |
| 1 e4 c5 2 b4 cxb4 3 a3 | B20 | King's Pawn-Sicilian Defence-Wing Gambit-Marshall Variation |
| 1 e4 c5 2 b4 cxb4 3 a3 bxa3 | B20 | Sicilian Defence-Wing Gambit-Marshall Variation-Carlsbad Variation |
| 1 e4 c5 2 b4 cxb4 3 a3 d5 4 exd5 Qxd5 5 Bb2 | B20 | Sicilian Defence-Wing Gambit-Marshall Variation-Marienbad Variation |
| 1 e4 c5 2 b4 cxb4 3 a3 d5 4 exd5 Qxd5 5 Nf3 e5 6 Bb2 Nc6 7 c4 Qe6 | B20 | Sicilian Defence-Wing Gambit-Marshall Variation-Romanian Defence |
| 1 e4 c5 2 b4 cxb4 3 a3 d5 4 exd5 Qxd5 5 Nf3 e5 6 c4 Qe6 7 Bd3 | B20 | Sicilian Defence-Wing Gambit-Marshall Variation-Nanu Gambit |
| 1 e4 c5 2 b4 cxb4 3 Bb2 | B20 | King's Pawn-Sicilian Defence-Wing Gambit-Abrahams Variation |
| 1 e4 c5 2 b4 cxb4 3 c4 | B20 | King's Pawn-Sicilian Defence-Wing Gambit-Santasiere Variation |
| 1 e4 c5 2 Bc4 | B20 Explore | King's Pawn-Sicilian Defence-Bowlder/Philidor Attack |
| 1 e4 c5 2 Be2 | B20 Explore | King's Pawn-Sicilian Defence-Slow Sicilian Variation |
| 1 e4 c5 2 c3 | B22 Explore | King's Pawn-Sicilian Defence-Alapin Variation |
| 1 e4 c5 2 c3 d5 3 exd5 Qxd5 | B22 | King's Pawn-Sicilian Defence-Alapin Variation-Barmen Defence |
| 1 e4 c5 2 c3 d5 3 exd5 Qxd5 4 d4 cxd4 5 cxd4 Nc6 6 Nf3 Bg4 | B22 | Sicilian Defence-Alapin Variation-Barmen Defence-Central Exchange Variation |
| 1 e4 c5 2 c3 d5 3 exd5 Qxd5 4 d4 cxd4 5 cxd4 Nc6 6 Nf3 Bg4 7 Nc3 Bxf3 8 gxf3 Qxd4 9 Qxd4 Nxd4 | B22 | Sicilian Defence-Barmen Defence-Central Exchange Variation-Endgame Variation |
| 1 e4 c5 2 c3 d5 3 exd5 Qxd5 4 d4 cxd4 5 cxd4 Nc6 6 Nf3 e5 7 Nc3 Bb4 8 Be2 | B22 | Sicilian Defence-Alapin Variation-Barmen Defence-Milner-Barry Attack |
| 1 e4 c5 2 c3 d5 3 exd5 Qxd5 4 d4 Nf6 5 Nf3 Bg4 | B22 | Sicilian Defence-Alapin Variation-Barmen Defence-Modern Line |
| 1 e4 c5 2 c3 Nf6 3 e5 Nd5 4 d4 cxd4 | B22 | King's Pawn-Sicilian Defence-Alapin Variation-Smith-Morra Declined |
| 1 e4 c5 2 c3 Nf6 3 e5 Nd5 4 d4 e6 5 Nf3 Nc6 | B22 | King's Pawn-Sicilian Defence-Alapin Variation-Sherzer Variation |
| 1 e4 c5 2 c3 Nf6 3 e5 Nd5 4 Nf3 Nc6 5 Bc4 Nb6 6 Bb3 | B22 | King's Pawn-Sicilian Defence-Alapin Variation-Stoltz Attack |
| 1 e4 c5 2 c3 Nf6 3 e5 Nd5 4 Nf3 Nc6 5 Bc4 Nb6 6 Bb3 c4 7 Bc2 Qc7 8 Qe2 g5 | B22 | Sicilian Defence-Alapin Variation-Stoltz Attack-Ivanchuk Line |
| 1 e4 c5 2 c3 Nf6 3 e5 Nd5 4 Nf3 Nc6 5 Na3 | B22 | King's Pawn-Sicilian Defence-Alapin Variation-Heidenfeld Variation |
| 1 e4 c5 2 c4 | B20 Explore | King's Pawn-Sicilian Defence-Staunton-Cochrane/English Variation |
| 1 e4 c5 2 c4 d6 3 Nc3 Nc6 4 g3 h5 | B20 | King's Pawn-Sicilian Defence-Staunton-Cochrane Variation-Gloria Variation |
| 1 e4 c5 2 d3 Nc6 3 c3 d6 4 f4 | B20 | King's Pawn-Sicilian Defence-Big Clamp Formation |
| 1 e4 c5 2 d4 | B21 Explore | King's Pawn-Sicilian Defence-Smith-Morra Gambit/Centre Game |
| 1 e4 c5 2 d4 cxd4 3 c3 d3 | B21 | King's Pawn-Sicilian Defence-Smith-Morra Gambit Declined-Push Variation |
| 1 e4 c5 2 d4 cxd4 3 c3 d3 4 c4 | B21 | Sicilian Defence-Smith-Morra Gambit Declined-Push Variation-Dubois Variation |
| 1 e4 c5 2 d4 cxd4 3 c3 d5 | B21 | King's Pawn-Sicilian Defence-Smith-Morra Gambit Declined-Scandinavian Formation |
| 1 e4 c5 2 d4 cxd4 3 c3 dxc3 | B21 | King's Pawn-Sicilian Defence-Smith-Morra Gambit Accepted |
| 1 e4 c5 2 d4 cxd4 3 c3 dxc3 4 Nf3 | B21 | King's Pawn-Sicilian Defence-Smith-Morra Gambit Accepted-Danish Variation |
| 1 e4 c5 2 d4 cxd4 3 c3 dxc3 4 Nxc3 d6 5 Bc4 e6 6 Nf3 Nf6 7 0-0 a6 | B21 | King's Pawn-Sicilian Defence-Smith-Morra Gambit Accepted-Chicago Defence |
| 1 e4 c5 2 d4 cxd4 3 c3 dxc3 4 Nxc3 e6 5 Bc4 a6 6 Nf3 Ne7 | B21 | King's Pawn-Sicilian Defence-Smith-Morra Gambit Accepted-Taimanov Formation |
| 1 e4 c5 2 d4 cxd4 3 c3 dxc3 4 Nxc3 e6 5 Nf3 a6 | B21 | King's Pawn-Sicilian Defence-Smith-Morra Gambit Accepted-Kan Formation |
| 1 e4 c5 2 d4 cxd4 3 c3 dxc3 4 Nxc3 Nc6 5 Nf3 d6 6 Bc4 a6 7 0-0 Nf6 | B21 | King's Pawn-Sicilian Defence-Smith-Morra Gambit Accepted-Classical Formation |
| 1 e4 c5 2 d4 cxd4 3 c3 dxc3 4 Nxc3 Nc6 5 Nf3 d6 6 Bc4 e6 | B21 | King's Pawn-Sicilian Defence-Smith-Morra Gambit Accepted-Scheveningen Formation |
| 1 e4 c5 2 d4 cxd4 3 c3 dxc3 4 Nxc3 Nc6 5 Nf3 d6 6 Bc4 e6 7 0-0 a6 8 Qe2 b5 9 Bb3 Ra7 | B21 | Sicilian Defence-Smith-Morra Gambit Accepted-Scheveningen Formation-Chicago Defence |
| 1 e4 c5 2 d4 cxd4 3 c3 dxc3 4 Nxc3 Nc6 5 Nf3 e6 6 Bc4 a6 | B21 | King's Pawn-Sicilian Defence-Smith-Morra Gambit Accepted-Paulsen Formation |
| 1 e4 c5 2 d4 cxd4 3 c3 dxc3 4 Nxc3 Nc6 5 Nf3 e6 6 Bc4 a6 7 0-0 b5 8 Bb3 Bc5 | B21 | Sicilian Defence-Smith-Morra Gambit Accepted-Paulsen Formation-Morphy Defence Deferred |
| 1 e4 c5 2 d4 cxd4 3 c3 dxc3 4 Nxc3 Nc6 5 Nf3 e6 6 Bc4 a6 7 0-0 Qc7 8 Qe2 Bd6 | B21 | Sicilian Defence-Smith-Morra Gambit Accepted-Paulsen Formation-Larsen Defence |
| 1 e4 c5 2 d4 cxd4 3 c3 dxc3 4 Nxc3 Nc6 5 Nf3 e6 6 Bc4 Bb4 | B21 | King's Pawn-Sicilian Defence-Smith-Morra Gambit Accepted-Pin Defence |
| 1 e4 c5 2 d4 cxd4 3 c3 dxc3 4 Nxc3 Nc6 5 Nf3 e6 6 Bc4 Bc5 | B21 | King's Pawn-Sicilian Defence-Smith-Morra Gambit Accepted-Morphy Defence |
| 1 e4 c5 2 d4 cxd4 3 c3 dxc3 4 Nxc3 Nc6 5 Nf3 e6 6 Bc4 d6 7 0-0 a6 8 Qe2 b5 | B21 | King's Pawn-Sicilian Defence-Smith-Morra Gambit Accepted-Sozin Formation |
| 1 e4 c5 2 d4 cxd4 3 c3 dxc3 4 Nxc3 Nc6 5 Nf3 d6 6 Bc4 e6 7 0-0 a6 8 Qe2 b5 9 Bb3 Ra7 | B21 | King's Pawn-Sicilian Defence-Smith-Morra Gambit Accepted-Chicago Variation |
| 1 e4 c5 2 d4 cxd4 3 c3 dxc3 4 Nxc3 Nc6 5 Nf3 g6 | B21 | King's Pawn-Sicilian Defence-Smith-Morra Gambit Accepted-Fianchetto Defence |
| 1 e4 c5 2 d4 cxd4 3 c3 e5 | B21 | King's Pawn-Sicilian Defence-Smith-Morra Gambit Declined-Centre Formation |
| 1 e4 c5 2 d4 cxd4 3 c3 Nf6 | B21 | King's Pawn-Sicilian Defence-Smith-Morra Gambit Declined-Alapin Formation |
| 1 e4 c5 2 d4 cxd4 3 c3 Qa5 | B21 | King's Pawn-Sicilian Defence-Smith-Morra Gambit Declined-Wing Formation |
| 1 e4 c5 2 d4 cxd4 3 f4 | B21 | King's Pawn-Sicilian Defence-Smith-Morra Gambit-Halasz/Larsen Gambit |
| 1 e4 c5 2 d4 cxd4 3 Nf3 | B21 | King's Pawn-Sicilian Defence-Smith-Morra Gambit-Morphy Gambit |
| 1 e4 c5 2 d4 cxd4 3 Nf3 e5 4 c3 | B21 | Sicilian Defence-Smith-Morra Gambit-Morphy Gambit-Andreaschek Gambit |
| 1 e4 c5 2 d4 cxd4 3 Qxd4 Nc6 4 Qd1 Nf6 5 Bc4 | B21 | King's Pawn-Sicilian Defence-Smith-Morra Gambit-Coles Sicilian Gambit |
| 1 e4 c5 2 f4 | B21 Explore | King's Pawn-Sicilian Defence-Grand Prix/McDonnell/Macdonnell Attack |
| 1 e4 c5 2 f4 d5 | B21 | King's Pawn-Sicilian Defence-Grand Prix Attack-Tal Defence |
| 1 e4 c5 2 f4 d5 3 exd5 Nf6 | B21 | Sicilian Defence-Grand Prix Attack-Tal Defence-Tal Gambit |
| 1 e4 c5 2 f4 d5 3 Nc3 | B21 | Sicilian Defence-Grand Prix Attack-Tal Defence-Toilet Variation |
| 1 e4 c5 2 g3 | B20 Explore | King's Pawn-Sicilian Defence-Steinitz/Lasker-Dunne Attack |
| 1 e4 c5 2 g4 | B20 Explore | King's Pawn-Sicilian Defence-Grob Variation |
| 1 e4 c5 2 h4 | B20 Explore | King's Pawn-Sicilian Defence-Myers Attack |
| 1 e4 c5 2 Ke2 | B20 Explore | King's Pawn-Sicilian Defence-King David's Opening |
| 1 e4 c5 2 Na3 | B20 Explore | King's Pawn-Sicilian Defence-Kronberger Variation |
| 1 e4 c5 2 Na3 Nc6 3 d4 cxd4 4 Bc4 | B20 | King's Pawn-Sicilian Defence-Kronberger Variation-Nemeth Gambit |
| 1 e4 c5 2 Nc3 | B23 Explore | King's Pawn-Sicilian Defence-Closed Variation |
| 1 e4 c5 2 Nc3 e5 | B23 | King's Pawn-Sicilian Defence-Closed Variation-Severino Defence |
| 1 e4 c5 2 Nc3 e6 3 d4 d5 | B23 | King's Pawn-Sicilian Defence-Closed Variation-Marshall Gambit |
| 1 e4 c5 2 Nc3 e6 3 g3 d5 | B23 | King's Pawn-Sicilian Defence-Closed Variation-Korchnoi Defence |
| 1 e4 c5 2 Nc3 Nc6 | B23 Explore | King's Pawn-Sicilian Defence-Closed Variation-Traditional Variation |
| 1 e4 c5 2 Nc3 Nc6 3 f4 | B23 Explore | Sicilian Defence-Closed Variation-Traditional Variation-Grand Prix/Zukertort Attack |
| 1 e4 c5 2 Nc3 Nc6 3 f4 g6 4 Nf3 Bg7 5 Bc4 e6 6 f5 | B23 | Sicilian Defence-Traditional Variation-Grand Prix Attack-Schofman Variation |
| 1 e4 c5 2 Nc3 Nc6 3 g3 | B24 Explore | Sicilian Defence-Closed Variation-Traditional Variation-Fianchetto Variation |
| 1 e4 c5 2 Nc3 Nc6 3 g3 g6 4 Bg2 Bg7 5 d3 d6 | B25 | Sicilian Defence-Closed Variation-Traditional Variation-Fianchetto Variation |
| 1 e4 c5 2 Nc3 Nc6 3 g3 g6 4 Bg2 Bg7 5 d3 d6 6 Be3 | B26 | Sicilian Defence-Closed Variation-Traditional Variation-Fianchetto Variation |
| 1 e4 c5 2 Nc3 Nc6 3 g3 g6 4 Bg2 Bg7 5 d3 d6 6 f4 e5 | B25 | Sicilian Defence-Traditional Variation-Fianchetto Variation-Botvinnik Defence I/Russian |
| 1 e4 c5 2 Nc3 Nc6 3 g3 g6 4 Bg2 Bg7 5 d3 d6 6 f4 e5 7 Nh3 Nge7 | B25 | Sicilian Defence-Fianchetto Variation-Botvinnik Defence I-Edge Variation |
| 1 e4 c5 2 Nc3 Nc6 3 g3 g6 4 Bg2 Bg7 5 d3 d6 6 Nge2 e5 | B25 | Sicilian Defence-Traditional Variation-Fianchetto Variation-Botvinnik Defence II |
| 1 e4 c5 2 Nc3 Nc6 3 g3 g6 4 Bg2 Bg7 5 d3 e6 6 Be3 Nd4 7 Nce2 | B24 | Sicilian Defence-Traditional Variation-Fianchetto Variation-Smyslov Variation |
| 1 e4 c5 2 Nc3 Nc6 3 g4 | B23 Explore | Sicilian Defence-Closed Variation-Traditional Variation-Grob Attack |
| 1 e4 c5 2 Nc3 Nc6 3 Nf3 e5 4 Bc4 d6 5 d3 Be7 6 Nd2 Bg5 | B30 | Sicilian Defence-Traditional Variation-Anti-Sveshnikov Variation-Kharlov-Kramnik Line |
| 1 e4 c5 2 Nc3 Nc6 3 Nge2 | B23 Explore | Sicilian Defence-Closed Variation-Traditional Variation-Chameleon Variation |
| 1 e4 c5 2 Ne2 | B20 Explore | King's Pawn-Sicilian Defence-Keres/Chameleon Variation |
| 1 e4 c5 2 Nf3 | B27 Explore | King's Pawn-Sicilian Defence-King's Knight Variation |
| 1 e4 c5 2 Nf3 a6 | B28 Explore | King's Pawn-Sicilian Defence-King's Knight Variation-O'Kelly Variation |
| 1 e4 c5 2 Nf3 a6 3 b3 | B28 | Sicilian Defence-King's Knight Variation-O'Kelly Variation-Kieseritzky System |
| 1 e4 c5 2 Nf3 a6 3 b4 | B28 | Sicilian Defence-King's Knight Variation-O'Kelly Variation-Wing Gambit |
| 1 e4 c5 2 Nf3 a6 3 Be2 | B28 | Sicilian Defence-King's Knight Variation-O'Kelly Variation-Aronin System |
| 1 e4 c5 2 Nf3 a6 3 c3 | B28 | Sicilian Defence-King's Knight Variation-O'Kelly Variation-Venice System |
| 1 e4 c5 2 Nf3 a6 3 c3 b5 | B28 | Sicilian Defence-O'Kelly Variation-Venice System-Ljubojevic Line |
| 1 e4 c5 2 Nf3 a6 3 c3 d5 4 exd5 Nf6 | B28 | Sicilian Defence-O'Kelly Variation-Venice System-Gambit Line |
| 1 e4 c5 2 Nf3 a6 3 c3 d6 | B28 | Sicilian Defence-O'Kelly Variation-Venice System-Steiner Line |
| 1 e4 c5 2 Nf3 a6 3 c3 Nf6 | B28 | Sicilian Defence-O'Kelly Variation-Venice System-Barcza Line |
| 1 e4 c5 2 Nf3 a6 3 c4 | B28 | Sicilian Defence-King's Knight Variation-O'Kelly Variation-Maróczy Bind |
| 1 e4 c5 2 Nf3 a6 3 c4 d6 | B28 | Sicilian Defence-O'Kelly Variation-Maróczy Bind-Robatsch Line |
| 1 e4 c5 2 Nf3 a6 3 c4 e6 | B28 | Sicilian Defence-O'Kelly Variation-Maróczy Bind-Paulsen Line |
| 1 e4 c5 2 Nf3 a6 3 c4 Nc6 4 d4 cxd4 5 Nxd4 e5 | B28 | Sicilian Defence-O'Kelly Variation-Maróczy Bind-Geller Line |
| 1 e4 c5 2 Nf3 a6 3 d3 | B28 | Sicilian Defence-King's Knight Variation-O'Kelly Variation-Quiet System |
| 1 e4 c5 2 Nf3 a6 3 d4 | B28 | Sicilian Defence-King's Knight Variation-O'Kelly Variation-Normal System |
| 1 e4 c5 2 Nf3 a6 3 d4 cxd4 4 Bc4 | B28 | Sicilian Defence-O'Kelly Variation-Normal System-Cortlever Gambit |
| 1 e4 c5 2 Nf3 a6 3 d4 cxd4 4 c3 | B28 | Sicilian Defence-O'Kelly Variation-Normal System-Smith-Morra Line |
| 1 e4 c5 2 Nf3 a6 3 d4 cxd4 4 Nxd4 e5 | B28 | Sicilian Defence-O'Kelly Variation-Normal System-Taimanov Line |
| 1 e4 c5 2 Nf3 a6 3 d4 cxd4 4 Nxd4 e6 | B28 | Sicilian Defence-O'Kelly Variation-Normal System-Kan Line |
| 1 e4 c5 2 Nf3 a6 3 d4 cxd4 4 Qxd4 | B28 | Sicilian Defence-O'Kelly Variation-Normal System-Zagorovsky Line |
| 1 e4 c5 2 Nf3 a6 3 g3 | B28 | Sicilian Defence-King's Knight Variation-O'Kelly Variation-Reti System |
| 1 e4 c5 2 Nf3 a6 3 Nc3 | B28 | Sicilian Defence-King's Knight Variation-O'Kelly Variation-Yerevan System |
| 1 e4 c5 2 Nf3 b5 | B27 Explore | King's Pawn-Sicilian Defence-King's Knight Variation-Polish Gambit |
| 1 e4 c5 2 Nf3 b6 | B27 Explore | King's Pawn-Sicilian Defence-King's Knight Variation-Katalimov Variation |
| 1 e4 c5 2 Nf3 d6 | B50 Explore | King's Pawn-Sicilian Defence-King's Knight Variation-Kopec Variation |
| 1 e4 c5 2 Nf3 d6 3 b4 | B50 | King's Pawn-Sicilian Defence-Kopec Variation-Wing Gambit Deferred |
| 1 e4 c5 2 Nf3 d6 3 Bb5+ | B51 | King's Pawn-Sicilian Defence-Kopec Variation-Canal-Sokolsky/Nimzowitsch-Rossolimo/Moscow Attack |
| 1 e4 c5 2 Nf3 d6 3 Bb5+ Bd7 | B52 | Sicilian Defence-Kopec Variation-Canal-Sokolsky Attack-Main Line |
| 1 e4 c5 2 Nf3 d6 3 Bb5+ Bd7 4 Bxd7+ Qxd7 5 0-0 Nc6 6 c3 Nf6 7 d4 | B52 | Sicilian Defence-Canal-Sokolsky Attack-Main Line-Bronstein/Haag Gambit |
| 1 e4 c5 2 Nf3 d6 3 Bb5+ Bd7 4 Bxd7+ Qxd7 5 c4 | B52 | Sicilian Defence-Canal-Sokolsky Attack-Main Line-Sokolsky Variation |
| 1 e4 c5 2 Nf3 d6 3 Bb5+ Nc6 | B51 | Sicilian Defence-Kopec Variation-Canal-Sokolsky Attack-Nimzovich Variation |
| 1 e4 c5 2 Nf3 d6 3 Bb5+ Nc6 4 0-0 Bd7 5 c3 a6 6 Bxc6 Bxc6 7 Re1 Nf6 8 d4 Bxe4 9 Bg5 | B51 | Sicilian Defence-Canal-Sokolsky Attack-Nimzovich Variation-Moscow Gambit |
| 1 e4 c5 2 Nf3 d6 3 Bb5+ Nc6 4 0-0 Bd7 5 Qe2 g6 6 e5 | B52 | Sicilian Defence-Canal-Sokolsky Attack-Nimzovich Variation-Dorfman Gambit |
| 1 e4 c5 2 Nf3 d6 3 c3 | B50 | Sicilian Defence-King's Knight Variation-Kopec Variation-Delayed Alapin Variation |
| 1 e4 c5 2 Nf3 d6 3 c3 Nf6 4 Be2 Nc6 5 d4 cxd4 6 cxd4 Nxe4 | B50 | Sicilian Defence-Kopec Variation-Delayed Alapin Variation-Basman-Palatnik Gambit |
| 1 e4 c5 2 Nf3 d6 3 c3 Nf6 4 Be2 Nc6 5 d4 cxd4 6 cxd4 Nxe4 7 d5 Qa5+ 8 Nc3 Nxc3 9 bxc3 | B50 | Sicilian Defence-Kopec Variation-Delayed Alapin Variation-Basman-Palatnik Double Gambit |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 (4 c3) | B53 | King's Pawn-Sicilian Defence-Kopec Variation-Tartakower Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 | B54 | King's Pawn-Sicilian Defence-Kopec Variation-Normal/Open Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 g6 | B54 | Sicilian Defence-Kopec Variation-Normal Variation-Dragon Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 g6 5 c4 | B54 | Sicilian Defence-Normal Variation-Dragon Variation-Maróczy Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 g6 5 Nc3 Bg7 6 Be3 Nf6 7 Bc4 Nc6 | B54 | Sicilian Defence-Kopec Variation-Normal Variation-Modern Dragon Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 | B54 | Sicilian Defence-Kopec Variation-Normal Variation-Benko/Main Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 f3 | B54 | Sicilian Defence-Kopec Variation-Benko Variation-Prins/Moscow Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 f3 e5 6 Bb5+ | B55 | Sicilian Defence-Benko Variation-Prins Variation-Venice Attack |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 f3 e5 6 Nb3 | B55 | Sicilian Defence-Benko Variation-Prins Variation-Rauzer Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 f3 e5 6 Nc6 | B54 | Sicilian Defence-Kopec Variation-Benko Variation-Prins/Moscow Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 | B56 | Sicilian Defence-Kopec Variation-Benko Variation-Sozin Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 a6 | B90 | Sicilian Defence-Benko Variation-Sozin Variation-Najdorf Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 a6 6 Bc4 | B90 | Sicilian Defence-Sozin Variation-Najdorf Variation-Lipnitzky/Lipnitsky Attack |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 a6 6 Be2 | B92 | Sicilian Defence-Sozin Variation-Najdorf Variation-Opocensky Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 a6 6 Be2 e5 7 Nb3 Be7 8 0-0 0-0 | B92 | Sicilian Defence-Najdorf Variation-Opovcensky Variation-Traditional Line |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 a6 6 Be2 e5 7 Nb3 Be7 8 0-0 Be6 | B92 | Sicilian Defence-Najdorf Variation-Opovcensky Variation-Modern Line |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 a6 6 Be3 | B90 | Sicilian Defence-Sozin Variation-Najdorf Variation-Byrne/English Attack |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 a6 6 Be3 Ng4 | B90 | Sicilian Defence-Najdorf Variation-Byrne Attack-Anti-English Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 a6 6 Bg5 | B94 | Sicilian Defence-Benko Variation-Sozin Variation-Najdorf Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 a6 6 Bg5 e6 | B95 | Sicilian Defence-Benko Variation-Sozin Variation-Najdorf Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 a6 6 Bg5 e6 7 f4 | B96 | Sicilian Defence-Benko Variation-Sozin Variation-Najdorf Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 a6 6 Bg5 e6 7 f4 b5 | B96 | Sicilian Defence-Sozin Variation-Najdorf Variation-Polugayevsky Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 a6 6 Bg5 e6 7 f4 b5 8 e5 dxe5 9 fxe5 Qc7 10 Qe2 | B96 | Sicilian Defence-Najdorf Variation-Polugayevsky Variation-Simagin Line |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 a6 6 Bg5 e6 7 f4 Be7 | B98 | Sicilian Defence-Benko Variation-Sozin Variation-Najdorf Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 a6 6 Bg5 e6 7 f4 Be7 8 Qf3 h6 9 Bh4 g5 | B98 | Sicilian Defence-Sozin Variation-Najdorf Variation-Argentine Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 a6 6 Bg5 e6 7 f4 Be7 8 Qf3 h6 9 Bh4 g5 10 fxg5 Nfd7 11 Nxe6 | B98 | Sicilian Defence-Najdorf Variation-Argentine Variation-Göteborg Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 a6 6 Bg5 e6 7 f4 Be7 8 Qf3 h6 9 Bh4 Qc7 | B98 | Sicilian Defencen-Sozin Variation-Najdorf Variation-Browne Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 a6 6 Bg5 e6 7 f4 Be7 8 Qf3 Qc7 | B98 | Sicilian Defence-Sozin Variation-Najdorf Variation-Traditional Line |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 a6 6 Bg5 e6 7 f4 Be7 8 Qf3 Qc7 9 0-0-0 Nbd7 | B99 | Sicilian Defence-Najdorf Variation-Traditional Line-Main Line |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 a6 6 Bg5 e6 7 f4 Nc6 | B96 | Sicilian Defence-Sozin Variation-Najdorf Variation-Neo-Classical Defence |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 a6 6 Bg5 e6 7 f4 Qb6 | B97 | Sicilian Defence-Benko Variation-Sozin Variation-Najdorf Variation-Poisoned Pawn Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 a6 6 Bg5 e6 7 f4 Qb6 8 Qd2 Qxb2 9 Rb1 Qa3 | B97 | Sicilian Defence-Sozin Variation-Najdorf Variation-Poisoned Pawn Variation Accepted |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 a6 6 Bg5 Nbd7 7 Bc4 Qa5 8 Qd2 e6 9 0-0-0 b5 10 Bb3 Bb7 11 Rhe1 Nc5 12 e5 | B94 | Sicilian Defence-Sozin Variation-Najdorf Variation-Ivkov Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 a6 6 f4 | B93 | Sicilian Defence-Sozin Variation-Najdorf Variation-Amsterdam Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 a6 6 g3 | B91 | Sicilian Defence-Sozin Variation-Najdorf Variation-Zagreb/Fianchetto Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 a6 6 g4 | B90 | Sicilian Defence-Sozin Variation-Najdorf Variation-Dekker Gambit |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 a6 6 h3 | B90 | Sicilian Defence-Sozin Variation-Najdorf Variation-Adams Attack |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 a6 6 Rg1 | B90 | Sicilian Defence-Sozin Variation-Najdorf Variation-Freak Attack |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 Bd7 | B56 | Sicilian Defence-Benko Variation-Sozin Variation-Kupreichik Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 e5 6 Bb5+ | B56 | Sicilian Defence-Benko Variation-Sozin Variation-Venice Attack |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 e6 | B80 | Sicilian Defence-Benko Variation-Sozin Variation-Scheveningen Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 e6 6 Bb5+ | B80 | Sicilian Defence-Sozin Variation-Scheveningen Variation-Vitolins Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 e6 6 Bc4 | B86 | Sicilian Defence-Sozin Variation-Scheveningen Variation-Sozin Attack |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 e6 6 Bc4 a6 7 Bb3 b5 | B87 | Sicilian Defence-Scheveningen Variation-Sozin Attack-Flank Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 e6 6 Bc4 Nc6 | B88 | Sicilian Defence-Scheveningen Variation-Sozin Attack-Leonhardt Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 e6 6 Bc4 Nc6 7 a3 | B88 | Sicilian Defence-Sozin Attack-Leonhardt Variation-Bronstein Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 e6 6 Bc4 Nc6 7 Bb3 (Be7 8 Be3 0-0 9 f4) | B88 | Sicilian Defence-Sozin Attack-Leonhardt Variation-Fischer Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 e6 6 Bc4 Nc6 7 Be3 | B89 | Sicilian Defence-Sozin Attack-Leonhardt Variation-Main Line |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 e6 6 Bc4 Nc6 7 Be3 Be7 8 Bb3 0-0 9 0-0 Na5 10 f4 b6 | B89 | Sicilian Defence-Leonhardt Variation-Main Line-Sherbakov Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 e6 6 Bc4 Nc6 7 Be3 Be7 8 Qe2 | B89 | Sicilian Defence-Leonhardt Variation-Main Line-Velimirovic Attack |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 e6 6 Be2 | B83 | Sicilian Defence-Sozin Variation-Scheveningen Variation-Classical Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 e6 6 Be2 a6 | B84 | Sicilian Defence-Scheveningen Variation-Classical Variation-Paulsen Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 e6 6 Be2 a6 7 0-0 Be7 8 f4 0-0 9 Be3 | B85 | Sicilian Defence-Scheveningen Variation-Classical Variation-Paulsen Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 e6 6 Be2 a6 7 0-0 Nbd7 | B84 | Sicilian Defence-Classical Variation-Paulsen Variation-Najdorf Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 e6 6 Be2 a6 7 0-0 Qc7 8 f4 Nc6 | B85 | Sicilian Defence-Scheveningen Variation-Classical Variation-Paulsen Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 e6 6 Be2 a6 7 0-0 Qc7 8 f4 Nc6 9 Be3 Be7 10 Qe1 0-0 | B85 | Sicilian Defence-Classical Variation-Paulsen Variation-Main Line |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 e6 6 Be2 a6 7 0-0 Qc7 8 f4 Nc6 9 Kh1 Be7 10 a4 | B85 | Sicilian Defence-Classical Variation-Paulsen Variation-Maroczy System |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 e6 6 Be2 Nc6 | B83 | Sicilian Defence-Benko Variation-Sozin Variation-Modern Scheveningen Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 e6 6 Be2 Nc6 7 0-0 Be7 8 Be3 0-0 9 f4 Bd7 10 Nb3 | B83 | Sicilian Defence-Sozin Variation-Modern Scheveningen Variation-Main Line |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 e6 6 Be2 Nc6 7 0-0 Be7 8 Kh1 | B83 | Sicilian Defence-Sozin Variation-Modern Scheveningen Variation-Maróczy Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 e6 6 Be3 a6 7 f3 | B80 | Sicilian Defence-Sozin Variation-Scheveningen Variation-English Attack |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 e6 6 Be3 a6 7 g4 | B81 | Sicilian Defence-Sozin Variation-Scheveningen Variation-Delayed Keres Attack |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 e6 6 Be3 a6 7 g4 e5 8 Nf5 g6 9 g5 | B81 | Sicilian Defence-Scheveningen Variation-Delayed Keres Attack-Perenyi Gambit |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 e6 6 Be3 a6 7 Qd2 | B80 | Sicilian Defence-Sozin Variation-Scheveningen Variation-English Attack |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 e6 6 f4 | B82 | Sicilian Defence-Sozin Variation-Scheveningen Variation-Matanovic Attack |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 e6 6 f4 Nc6 7 Be3 Be7 8 Qf3 | B82 | Sicilian Defence-Scheveningen Variation-Matanovic Attack-Tal Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 e6 6 g3 | B80 | Sicilian Defence-Sozin Variation-Scheveningen Variation-Fianchetto Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 e6 6 g4 | B81 | Sicilian Defence-Sozin Variation-Scheveningen Variation-Keres Attack |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 g6 | B70 | Sicilian Defence-Benko Variation-Sozin Variation-Dragon Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 g6 6 Be2 | B72 | Sicilian Defence-Sozin Variation-Dragon Variation-Classical Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 g6 6 Be2 Bg7 7 0-0 0-0 8 Nb3 Nc6 9 Kh1 | B70 | Sicilian Defence-Dragon Variation-Classical Variation-Alekhine Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 g6 6 Be2 Bg7 7 Be3 Nc6 | B73 | Sicilian Defence-Sozin Variation-Dragon Variation-Classical Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 g6 6 Be2 Bg7 7 Be3 Nc6 8 0-0 0-0 9 Nb3 | B74 | Sicilian Defence-Dragon Variation-Classical Variation-Normal Line |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 g6 6 Be2 Bg7 7 Be3 Nc6 8 0-0 0-0 9 Nb3 a5 | B74 | Sicilian Defence-Classical Variation-Normal Line-Alekhine Line |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 g6 6 Be2 Bg7 7 Be3 Nc6 8 0-0 0-0 9 Nb3 Be6 10 f4 Na5 | B74 | Sicilian Defence-Classical Variation-Normal Line-Maroczy Line |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 g6 6 Be2 Bg7 7 Be3 Nc6 8 0-0 0-0 9 Nb3 Be6 10 f4 Na5 11 f5 Bc4 12 Nxa5 Bxe2 13 Qxe2 Qxa5 14 g4 | B74 | Sicilian Defence-Normal Line-Maroczy Line-Stockholm Attack |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 g6 6 Be2 Bg7 7 Be3 Nc6 8 0-0 0-0 9 Nb3 Be6 10 f4 Qc8 | B74 | Sicilian Defence-Classical Variation-Normal Line-Tartakower Line |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 g6 6 Be2 Bg7 7 Be3 Nc6 8 0-0 0-0 9 Qd2 | B73 | Sicilian Defence-Dragon Variation-Classical Variation-Battery Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 g6 6 Be2 Bg7 7 Be3 Nc6 8 Nb3 | B72 | Sicilian Defence-Dragon Variation-Classical Variation-Nottingham Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 g6 6 Be3 | B72 | Sicilian Defence-Benko Variation-Sozin Variation-Dragon Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 g6 6 Be3 Bg7 7 Be2 | B72 | Sicilian Defence-Sozin Variation-Dragon Variation-Classical Attack |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 g6 6 Be3 Bg7 7 Be2 Nc6 (8 0-0 0-0 9 f4 Qb6 10 e5) | B73 | Sicilian Defence-Dragon Variation-Classical Attack-Zollner Gambit |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 g6 6 Be3 Bg7 7 Be2 Nc6 8 0-0 | B73 | Sicilian Defence-Sozin Variation-Dragon Variation-Classical Attack |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 g6 6 Be3 Bg7 7 Be2 Nc6 8 0-0 0-0 9 f4 Qb6 10 e5 | B73 | Sicilian Defence-Dragon Variation-Classical Attack-Zollner Gambit |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 g6 6 Be3 Bg7 7 Be2 Nc6 8 0-0 0-0 9 Nb3 | B74 | Sicilian Defence-Sozin Variation-Dragon Variation-Classical Attack |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 g6 6 Be3 Bg7 7 Be2 Nc6 8 0-0 0-0 9 Nb3 a5 | B74 | Sicilian Defence-Dragon Variation-Classical Attack-Alekhine Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 g6 6 Be3 Bg7 7 Be2 Nc6 8 0-0 0-0 9 Nb3 Be6 10 f4 Na5 11 f5 Bc4 12 Bd3 | B74 | Sicilian Defence-Dragon Variation-Classical Attack-Spielmann Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 g6 6 Be3 Bg7 7 Be2 Nc6 8 0-0 0-0 9 Nb3 Be6 10 f4 Na5 11 f5 (Bc4 12 Bd3 Bxd3 13 cxd3 d5) | B74 | Sicilian Defence-Dragon Variation-Spielmann Variation-Bernard Defence |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 g6 6 Be3 Bg7 7 Be2 Nc6 8 0-0 0-0 9 Nb3 Be6 10 f4 Na5 11 f5 Bc4 12 Nxa5 Bxe2 13 Qxe2 Qxa5 14 g4 | B74 | Sicilian Defence-Dragon Variation-Classical Attack-Stockholm Attack |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 g6 6 Be3 Bg7 7 Be2 Nc6 8 0-0 0-0 9 Nb3 Be6 10 f4 Qc8 | B74 | Sicilian Defence-Dragon Variation-Classical Attack-Réti-Tartakower Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 g6 6 Be3 Bg7 7 Be2 Nc6 8 0-0 0-0 9 Qd2 | B73 | Sicilian Defence-Dragon Variation-Classical Attack-Richter Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 g6 6 Be3 Bg7 7 Be2 Nc6 8 Nb3 | B72 | Sicilian Defence-Dragon Variation-Classical Attack-Nottingham Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 g6 6 Be3 Bg7 7 Be2 Nc6 8 Qd2 | B72 | Sicilian Defence-Dragon Variation-Classical Attack-Amsterdam Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 g6 6 Be3 Bg7 7 Be2 Nc6 8 Qd2 0-0 9 0-0-0 | B72 | Sicilian Defence-Dragon Variation-Amsterdam Variation-Grigoriev Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 g6 6 Be3 Bg7 7 f3 | B75 | Sicilian Defence-Sozin Variation-Dragon Variation-Yugoslav Attack |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 g6 6 Be3 Bg7 7 f3 0-0 | B76 | Sicilian Defence-Sozin Variation-Dragon Variation-Yugoslav Attack |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 g6 6 Be3 Bg7 7 f3 0-0 8 Qd2 Nc6 9 0-0-0 | B76 | Sicilian Defence-Dragon Variation-Yugoslav Attack-Rauser/Rauzer/Modern Line |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 g6 6 Be3 Bg7 7 f3 0-0 8 Qd2 Nc6 9 Bc4 | B77 | Sicilian Defence-Dragon Variation-Yugoslav Attack-Main Line |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 g6 6 Be3 Bg7 7 f3 0-0 8 Qd2 Nc6 9 Bc4 a5 | B77 | Sicilian Defence-Yugoslav Attack-Main Line-Byrne Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 g6 6 Be3 Bg7 7 f3 0-0 8 Qd2 Nc6 9 Bc4 Bd7 10 0-0-0 | B78 | Sicilian Defence-Dragon Variation-Yugoslav Attack-Main Line |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 g6 6 Be3 Bg7 7 f3 0-0 8 Qd2 Nc6 9 Bc4 Bd7 10 0-0-0 Qa5 11 Bb3 Rfc8 12 h4 | B79 | Sicilian Defence-Dragon Variation-Yugoslav Attack-Main Line |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 g6 6 Be3 Bg7 7 f3 0-0 8 Qd2 Nc6 9 Bc4 Bd7 10 0-0-0 Qa5 11 Bb3 Rfc8 12 h4 h5 | B79 | Sicilian Defence-Yugoslav Attack-Main Line-Soltis Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 g6 6 Be3 Bg7 7 f3 0-0 8 Qd2 Nc6 9 Bc4 Bd7 10 0-0-0 Rc8 | B78 | Sicilian Defence-Yugoslav Attack-Main Line-Old Line |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 g6 6 Be3 Bg7 7 f3 0-0 8 Qd2 Nc6 9 Bc4 Nd7 | B77 | Sicilian Defence-Yugoslav Attack-Main Line-Sosonko Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 g6 6 Be3 Bg7 7 f3 0-0 8 Qd2 Nc6 9 Bc4 Nxd4 10 Bxd4 Be6 | B77 | Sicilian Defence-Yugoslav Attack-Main Line-Czerniak Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 g6 6 Be3 Bg7 7 f3 0-0 8 Qd2 Nc6 9 g4 | B76 | Sicilian Defence-Dragon Variation-Yugoslav Attack-Panov Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 g6 6 Be3 Bg7 7 f3 0-0 8 Qd2 Nc6 9 g4 d5 | B76 | Sicilian Defence-Yugoslav Attack-Panov Variation-Veresov Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 g6 6 Be3 Bg7 7 f3 Nc6 | B76 | Sicilian Defence-Dragon Variation-Yugoslav Attack-Belezky Line |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 g6 6 f4 | B71 | Sicilian Defence-Sozin Variation-Dragon Variation-Levenfish Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 g6 6 f4 Nbd7 | B71 | Sicilian Defence-Dragon Variation-Levenfish Variation-Flohr/Main Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 g6 6 g3 | B70 | Sicilian Defence-Sozin Variation-Dragon Variation-Fianchetto Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 Nc6 | B56 | Sicilian Defence-Benko Variation-Sozin Variation-Classical/2 Knights Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 Nc6 6 Bc4 | B57 | Sicilian Defence-Benko Variation-Sozin Variation-Classical Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 Nc6 6 Bc4 g6 7 Nxc6 bxc6 8 e5 | B57 | Sicilian Defence-Sozin Variation-Classical Variation-Magnus Smith Trap |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 Nc6 6 Bc4 Qb6 | B57 | Sicilian Defence-Sozin Variation-Classical Variation-Anti-Sozin Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 Nc6 6 Bd3 | B56 | Sicilian Defence-Sozin Variation-Classical Variation-Yates Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 Nc6 6 Be2 | B58 | Sicilian Defence-Benko Variation-Sozin Variation-Classical Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 Nc6 6 Be2 e5 | B58 | Sicilian Defence-Sozin Variation-Classical Variation-Boleslavsky Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 Nc6 6 Be2 e5 7 Nb3 | B59 | Sicilian Defence-Sozin Variation-Classical Variation-Boleslavsky Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 Nc6 6 Be2 e5 7 Nxc6 | B58 | Sicilian Defence-Classical Variation-Boleslavsky Variation-Louma Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 Nc6 6 Be2 Nxd4 7 Qxd4 g6 | B58 | Sicilian Defence-Sozin Variation-Classical Variation-Dragon Transfer |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 Nc6 6 Bg5 | B60 | Sicilian Defence-Sozin Variation-Classical Variation-Richter-Rauzer Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 Nc6 6 Bg5 Bd7 | B60 | Sicilian Defence-Classical Variation-Richter-Rauzer Variation-Larsen/Modern Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 Nc6 6 Bg5 Bd7 7 Qd2 | B61 | Sicilian Defence-Classical Variation-Richter-Rauzer Variation-Larsen Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 Nc6 6 Bg5 e6 | B62 | Sicilian Defence-Sozin Variation-Classical Variation-Richter-Rauzer Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 Nc6 6 Bg5 e6 7 Bb5 | B62 | Sicilian Defence-Classical Variation-Richter-Rauzer Variation-Margate/Alekhine/Vitolins Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 Nc6 6 Bg5 e6 7 Nb3 | B62 | Sicilian Defence-Classical Variation-Richter-Rauzer Variation-Podebrady Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 Nc6 6 Bg5 e6 7 Nxc6 | B62 | Sicilian Defence-Classical Variation-Richter-Rauzer Variation-Richter/Exchange Attack |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 Nc6 6 Bg5 e6 7 Qd2 | B63 | Sicilian Defence-Classical Variation-Richter-Rauzer Variation-Rauzer/Traditional Attack |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 Nc6 6 Bg5 e6 7 Qd2 a6 | B66 | Sicilian Defence-Classical Variation-Richter-Rauzer Variation-Rauzer Attack |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 Nc6 6 Bg5 e6 7 Qd2 a6 8 0-0-0 Bd7 | B67 | Sicilian Defence-Richter-Rauzer Variation-Rauzer Attack-Neo-Modern Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 Nc6 6 Bg5 e6 7 Qd2 a6 8 0-0-0 Bd7 9 f4 Be7 | B68 | Sicilian Defence-Richter-Rauzer Variation-Rauzer Attack-Neo-Modern Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 Nc6 6 Bg5 e6 7 Qd2 a6 8 0-0-0 Bd7 9 f4 Be7 10 Nf3 b5 11 Bxf6 | B69 | Sicilian Defence-Rauzer Attack-Neo-Modern Variation-Nyezhmetdinov Attack |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 Nc6 6 Bg5 e6 7 Qd2 Be7 8 0-0-0 0-0 9 f4 | B64 | Sicilian Defence-Classical Variation-Richter-Rauzer Variation-Rauzer Attack |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 Nc6 6 Bg5 e6 7 Qd2 Be7 8 0-0-0 0-0 9 f4 e5 | B64 | Sicilian Defence-Richter-Rauzer Variation-Rauzer Attack-Geller Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 Nc6 6 Bg5 e6 7 Qd2 Be7 8 0-0-0 0-0 9 f4 Nxd4 (10 Qxd4) | B65 | Sicilian Defence-Classical Variation-Richter-Rauzer Variation-Rauzer Attack |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 Nc6 6 Bg5 e6 7 Qd2 Be7 8 0-0-0 Nxd4 9 Qxd4 a6 10 f4 b5 | B66 | Sicilian Defence-Richter-Rauzer Variation-Rauzer Attack-Kantscher Line |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 Nc6 6 Bg5 e6 7 Qd2 Qb6 | B63 | Sicilian Defence-Richter-Rauzer Variation-Rauzer Attack-Ivanov Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 Nc6 6 Bg5 e6 7 Qd3 | B62 | Sicilian Defence-Classical Variation-Richter-Rauzer Variation-Keres Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 Nc6 6 Bg5 g6 | B60 | Sicilian Defence-Classical Variation-Richter-Rauzer Variation-Bondarevsky/Dragon Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 Nc6 6 g3 | B58 | Sicilian Defence-Sozin Variation-Classical Variation-Fianchetto Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 Nc6 6 Nde2 | B56 | Sicilian Defence-Sozin Variation-Classical Variation-Spielmann Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Qxd4 | B53 | Sicilian Defence-Kopec Variation-Tartakower Variation-Chekhover Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 cxd4 4 Qxd4 Nc6 5 Bb5 Qd7 | B53 | Sicilian Defence-Tartakower Variation-Chekhover Variation-Zaitsev Defence |
| 1 e4 c5 2 Nf3 d6 3 d4 Nf6 | B53 | King's Pawn-Sicilian Defence-Kopec Variation-Cortlever/Alatortsev Variation |
| 1 e4 c5 2 Nf3 d6 3 d4 Nf6 4 dxc5 Nxe4 | B53 | King's Pawn-Sicilian Defence-Kopec Variation-Cortlever Variation Accepted |
| 1 e4 c5 2 Nf3 d6 3 g3 b5 | B50 | Sicilian Defence-King's Knight Variation-Kopec Variation-Kotov Gambit |
| 1 e4 c5 2 Nf3 e5 | B27 Explore | King's Pawn-Sicilian Defence-King's Knight Variation-Jalalabad Variation |
| 1 e4 c5 2 Nf3 e6 | B40 Explore | King's Pawn-Sicilian Defence-King's Knight Variation-Paulsen/French Variation |
| 1 e4 c5 2 Nf3 e6 3 b3 | B40 | Sicilian Defence-King's Knight Variation-Paulsen Variation-Westerinen Attack |
| 1 e4 c5 2 Nf3 e6 3 b4 | B40 | Sicilian Defence-King's Knight Variation-Paulsen Variation-Wing Gambit Deferred |
| 1 e4 c5 2 Nf3 e6 3 c3 | B40 | Sicilian Defence-King's Knight Variation-Paulsen Variation-Delayed Alapin Variation |
| 1 e4 c5 2 Nf3 e6 3 c4 | B40 | Sicilian Defence-King's Knight Variation-Paulsen Variation-Kramnik Variation |
| 1 e4 c5 2 Nf3 e6 3 d4 a6 | B40 | Sicilian Defence-King's Knight Variation-Paulsen Variation-Drazic Variation |
| 1 e4 c5 2 Nf3 e6 3 d4 cxd4 | B40 | Sicilian Defence-King's Knight Variation-Paulsen Variation-Open Variation |
| 1 e4 c5 2 Nf3 e6 3 d4 cxd4 4 c3 | B40 | Sicilian Defence-Paulsen Variation-Open Variation-Smith-Morra Gambit Deferred |
| 1 e4 c5 2 Nf3 e6 3 d4 cxd4 4 Nxd4 a6 | B41 | Sicilian Defence-Paulsen Variation-Open Variation-Kan Variation |
| 1 e4 c5 2 Nf3 e6 3 d4 cxd4 4 Nxd4 a6 5 Bd3 | B42 | Sicilian Defence-Open Variation-Kan Variation-Modern Variation |
| 1 e4 c5 2 Nf3 e6 3 d4 cxd4 4 Nxd4 a6 5 Bd3 Bc5 | B42 | Sicilian Defence-Kan Variation-Modern Variation-Polugaevsky Variation |
| 1 e4 c5 2 Nf3 e6 3 d4 cxd4 4 Nxd4 a6 5 Bd3 g6 | B42 | Sicilian Defence-Kan Variation-Modern Variation-Swiss Cheese Variation |
| 1 e4 c5 2 Nf3 e6 3 d4 cxd4 4 Nxd4 a6 5 Bd3 Nf6 6 0-0 d6 7 c4 g6 | B42 | Sicilian Defence-Kan Variation-Modern Variation-Gipslis Variation |
| 1 e4 c5 2 Nf3 e6 3 d4 cxd4 4 Nxd4 a6 5 c4 | B41 | Sicilian Defence-Open Variation-Kan Variation-Maroczy Bind/Réti Variation |
| 1 e4 c5 2 Nf3 e6 3 d4 cxd4 4 Nxd4 a6 5 c4 g6 | B41 | Sicilian Defence-Kan Variation-Maroczy Bind-Hedgehog Variation |
| 1 e4 c5 2 Nf3 e6 3 d4 cxd4 4 Nxd4 a6 5 c4 Nf6 6 Nc3 Bb4 7 Bd3 Nc6 (8 Bc2) | B41 | Sicilian Defence-Open Variation-Maroczy Bind-Bronstein Variation |
| 1 e4 c5 2 Nf3 e6 3 d4 cxd4 4 Nxd4 a6 5 Nc3 | B43 | Sicilian Defence-Open Variation-Kan Variation-Knight Variation |
| 1 e4 c5 2 Nf3 e6 3 d4 cxd4 4 Nxd4 a6 5 Nc3 b5 | B43 | Sicilian Defence-Kan Variation-Knight Variation-Wing Attack |
| 1 e4 c5 2 Nf3 e6 3 d4 cxd4 4 Nxd4 a6 5 Nc3 b5 6 Bd3 Qb6 7 Be3 Bc5 8 Qg4 | B43 | Sicilian Defence-Knight Variation-Wing Attack-Christiansen's Dream |
| 1 e4 c5 2 Nf3 e6 3 d4 cxd4 4 Nxd4 a6 5 Nc3 b5 6 Bd3 Qb6 7 Nf3 | B43 | Sicilian Defence-Knight Variation-Wing Attack-Spraggett Attack |
| 1 e4 c5 2 Nf3 e6 3 d4 cxd4 4 Nxd4 a6 5 Nc3 b5 6 g3 | B43 | Sicilian Defence-Knight Variation-Wing Attack-Fianchetto Variation |
| 1 e4 c5 2 Nf3 e6 3 d4 cxd4 4 Nxd4 Bc5 | B40 | Sicilian Defence-Paulsen Variation-Open Variation-Paulsen-Basman Defence |
| 1 e4 c5 2 Nf3 e6 3 d4 cxd4 4 Nxd4 Nc6 | B44 | King's Pawn-Sicilian Defence-Open Variation-Taimanov/Barnes Variation |
| 1 e4 c5 2 Nf3 e6 3 d4 cxd4 4 Nxd4 Nc6 5 Nb5 | B44 | Sicilian Defence-Open Variation-Taimanov Variation-Szén/Anti-Taimanov Variation |
| 1 e4 c5 2 Nf3 e6 3 d4 cxd4 4 Nxd4 Nc6 5 Nb5 d6 | B44 | Sicilian Defence-Taimanov Variation-Szén Variation-Dely-Kasparov Gambit |
| 1 e4 c5 2 Nf3 e6 3 d4 cxd4 4 Nxd4 Nc6 5 Nb5 d6 6 c4 Nf6 7 N1c3 a6 8 Na3 Be7 9 Be2 0-0 10 0-0 b6 | B44 | Sicilian Defence-Taimanov Variation-Szén Variation-Hedgehog/Modern Line |
| 1 e4 c5 2 Nf3 e6 3 d4 cxd4 4 Nxd4 Nc6 5 Nb5 d6 6 c4 Nf6 7 N1c3 a6 8 Na3 d5 | B44 | Sicilian Defence-Szén Variation-Dely-Kasparov Gambit-Gary/Dely Gambit |
| 1 e4 c5 2 Nf3 e6 3 d4 cxd4 4 Nxd4 Nc6 5 Nc3 | B45 | Sicilian Defence-Open Variation-Taimanov Variation-Normal Variation |
| 1 e4 c5 2 Nf3 e6 3 d4 cxd4 4 Nxd4 Nc6 5 Nc3 a6 | B46 | Sicilian Defence-Open Variation-Taimanov Variation-Russian Variation |
| 1 e4 c5 2 Nf3 e6 3 d4 cxd4 4 Nxd4 Nc6 5 Nc3 a6 6 Be2 Nge7 | B46 | Sicilian Defence-Taimanov Variation-Russian Variation-Normal Variation |
| 1 e4 c5 2 Nf3 e6 3 d4 cxd4 4 Nxd4 Nc6 5 Nc3 Nf6 6 Be2 Bb4 7 0-0 | B45 | Sicilian Defence-Taimanov Variation-Normal Variation-Barnes Gambit |
| 1 e4 c5 2 Nf3 e6 3 d4 cxd4 4 Nxd4 Nc6 5 Nc3 Nf6 6 Ndb5 Bb4 | B45 | Sicilian Defence-Taimanov Variation-Normal Variation-Paulsen Variation |
| 1 e4 c5 2 Nf3 e6 3 d4 cxd4 4 Nxd4 Nc6 5 Nc3 Nf6 6 Ndb5 Bb4 7 Nd6+ | B45 | Sicilian Defence-Normal Variation-Paulsen Variation-American Attack |
| 1 e4 c5 2 Nf3 e6 3 d4 cxd4 4 Nxd4 Nc6 5 Nc3 Qc7 | B47 | Sicilian Defence-Taimanov Variation-Normal Variation-Bastrikov Variation |
| 1 e4 c5 2 Nf3 e6 3 d4 cxd4 4 Nxd4 Nc6 5 Nc3 Qc7 6 Be3 | B48 | Sicilian Defence-Taimanov Variation-Normal Variation-Bastrikov Variation |
| 1 e4 c5 2 Nf3 e6 3 d4 cxd4 4 Nxd4 Nc6 5 Nc3 Qc7 6 Be3 a6 7 Be2 | B49 | Sicilian Defence-Taimanov Variation-Normal Variation-Bastrikov Variation |
| 1 e4 c5 2 Nf3 e6 3 d4 cxd4 4 Nxd4 Nc6 5 Nc3 Qc7 6 Be3 a6 7 Be2 b5 8 Nxc6 Qxc6 9 a3 Bb7 10 Qd4 | B49 | Sicilian Defence-Normal Variation-Bastrikov Variation-Bronstein Variation |
| 1 e4 c5 2 Nf3 e6 3 d4 cxd4 4 Nxd4 Nc6 5 Nc3 Qc7 6 Be3 a6 7 f3 | B49 | Sicilian Defence-Normal Variation-Bastrikov Variation-English Attack |
| 1 e4 c5 2 Nf3 e6 3 d4 cxd4 4 Nxd4 Nc6 5 Nc3 Qc7 6 Be3 a6 7 Qd2 | B48 | Sicilian Defence-Normal Variation-Bastrikov Variation-English Attack |
| 1 e4 c5 2 Nf3 e6 3 d4 cxd4 4 Nxd4 Nc6 5 Nc3 Qc7 6 Ndb5 Qb8 7 Be3 a6 8 Bb6 | B48 | Sicilian Defence-Normal Variation-Bastrikov Variation-Ponomariov Gambit |
| 1 e4 c5 2 Nf3 e6 3 d4 cxd4 4 Nxd4 Nf6 | B40 | Sicilian Defence-Paulsen Variation-Open Variation-Anderssen/Normal Counterattack |
| 1 e4 c5 2 Nf3 e6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 Bb4 | B40 | Sicilian Defence-Open Variation-Anderssen Counterattack-Pin Variation |
| 1 e4 c5 2 Nf3 e6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 Bb4 6 Bd3 e5 | B40 | Sicilian Defence-Anderssen Counterattack-Pin Variation-Jaffe Variation |
| 1 e4 c5 2 Nf3 e6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 Bb4 6 e5 | B40 | Sicilian Defence-Anderssen Counterattack-Pin Variation-Koch Variation |
| 1 e4 c5 2 Nf3 e6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 Nc6 | B45 | Sicilian Defence-Open Variation-Anderssen Counterattack-4 Knights Variation |
| 1 e4 c5 2 Nf3 e6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 Nc6 6 Ndb5 Bc5 | B45 | Sicilian Defence-Anderssen Counterattack-4 Knights Variation-Cobra Variation |
| 1 e4 c5 2 Nf3 e6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 Nc6 6 Nxc6 | B45 | Sicilian Defence-Anderssen Counterattack-4 Knights Variation-Exchange Variation |
| 1 e4 c5 2 Nf3 e6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 Qb6 | B40 | Sicilian Defence-Open Variation-Anderssen Counterattack-Gaw-Paw Variation |
| 1 e4 c5 2 Nf3 e6 3 d4 cxd4 4 Nxd4 Qb6 | B40 | Sicilian Defence-Paulsen Variation-Open Variation-Kveinis Variation |
| 1 e4 c5 2 Nf3 e6 3 d4 d5 | B40 | King's Pawn-Sicilian Defence-Paulsen Variation-Marshall Counterattack |
| 1 e4 c5 2 Nf3 f5 | B27 Explore | King's Pawn-Sicilian Defence-King's Knight Variation-Brussels Gambit |
| 1 e4 c5 2 Nf3 f5 3 exf5 Nh6 | B28 | Sicilian Defence-King's Knight Variation-Brussels Gambit-Double-Dutch Gambit |
| 1 e4 c5 2 Nf3 g6 | B27 Explore | King's Pawn-Sicilian Defence-King's Knight Variation-Hungarian/Hyperaccelerated Dragon Variation |
| 1 e4 c5 2 Nf3 g6 3 c4 | B27 | Sicilian Defence-King's Knight Variation-Hungarian Variation-Maróczy Variation |
| 1 e4 c5 2 Nf3 g6 3 c4 Bh6 | B27 | Sicilian Defence-Hungarian Variation-Maróczy Variation-Acton Extension |
| 1 e4 c5 2 Nf3 g6 3 d4 | A42 | Sicilian Defence-King's Knight Variation-Hungarian Variation-Hyperaccelerated Fianchetto |
| 1 e4 c5 2 Nf3 g6 3 d4 Bg7 | A42 | Sicilian Defence-Hungarian Variation-Hyperaccelerated Fianchetto-Hyperaccelerated Pterodactyl Variation |
| 1 e4 c5 2 Nf3 g6 3 d4 Bg7 4 dxc5 Qa5+ 5 Nc3 Bxc3+ 6 bxc3 Qxc3+ | A42 | Sicilian Defence-Hyperaccelerated Fianchetto-Hyperaccelerated Pterodactyl Variation-Exchange Variation |
| 1 e4 c5 2 Nf3 g6 3 d4 f5 | A42 | Sicilian Defence-Hungarian Variation-Hyperaccelerated Fianchetto-Frederico/Fred Variation |
| 1 e4 c5 2 Nf3 h6 | B27 Explore | King's Pawn-Sicilian Defence-King's Knight Variation-Bücker Variation |
| 1 e4 c5 2 Nf3 Nc6 | B30 Explore | King's Pawn-Sicilian Defence-King's Knight Variation-Old Sicilian Defence |
| 1 e4 c5 2 Nf3 Nc6 3 Bb5 | B30 | Sicilian Defence-King's Knight Variation-Old Sicilian Defence-Nimzowitsch-Rossolimo/Nyezhmetdinov-Rossolimo Attack |
| 1 e4 c5 2 Nf3 Nc6 3 Bb5 e6 4 Nc3 Nd4 | B30 | Sicilian Defence-Old Sicilian Defence-Nimzowitsch-Rossolimo Attack-Anderssen Variation |
| 1 e4 c5 2 Nf3 Nc6 3 Bb5 g6 | B31 | Sicilian Defence-Old Sicilian Defence-Nimzowitsch-Rossolimo Attack-Fianchetto/Rossolimo Variation |
| 1 e4 c5 2 Nf3 Nc6 3 Bb5 g6 4 0-0 Bg7 5 c3 e5 6 d4 | B31 | Old Sicilian Defence-Nimzowitsch-Rossolimo Attack-Fianchetto Variation-Gufeld Gambit |
| 1 e4 c5 2 Nf3 Nc6 3 Bb5 g6 4 0-0 Bg7 5 c3 Nf6 6 d4 | B31 | Old Sicilian Defence-Nimzowitsch-Rossolimo Attack-Fianchetto Variation-Lutikov Gambit |
| 1 e4 c5 2 Nf3 Nc6 3 Bb5 g6 4 0-0 Bg7 5 c3 Nf6 6 Qa4 | B31 | Old Sicilian Defence-Nimzowitsch-Rossolimo Attack-Fianchetto Variation-Totsky Attack |
| 1 e4 c5 2 Nf3 Nc6 3 Bb5 g6 4 0-0 Bg7 5 Re1 e5 6 b4 | B31 | Sicilian Defence-Nimzowitsch-Rossolimo Attack-Fianchetto Variation-Gurgenidze Variation |
| 1 e4 c5 2 Nf3 Nc6 3 Bb5 Na5 4 b4 | B31 | Sicilian Defence-Old Sicilian Defence-Nimzowitsch-Rossolimo Attack-San Francisco Gambit |
| 1 e4 c5 2 Nf3 Nc6 3 Bb5 Nb8 | B31 | Sicilian Defence-Old Sicilian Defence-Nimzowitsch-Rossolimo Attack-Brooklyn Retreat Defence |
| 1 e4 c5 2 Nf3 Nc6 3 d4 | B32 | Sicilian Defence-King's Knight Variation-Old Sicilian Defence-Open Variation |
| 1 e4 c5 2 Nf3 Nc6 3 d4 cxd4 4 c3 | B32 | Sicilian Defence-Old Sicilian Defence-Open Variation-Morra Variation |
| 1 e4 c5 2 Nf3 Nc6 3 d4 cxd4 4 Nxd4 d5 | B32 | Sicilian Defence-Old Sicilian Defence-Open Variation-Nimzowitsch/Nimzo-American Variation |
| 1 e4 c5 2 Nf3 Nc6 3 d4 cxd4 4 Nxd4 e5 | B32 | Sicilian Defence-Old Sicilian Defence-Open Variation-Labourdonnais-Löwenthal Variation |
| 1 e4 c5 2 Nf3 Nc6 3 d4 cxd4 4 Nxd4 e5 5 Nb5 d6 | B32 | Sicilian Defence-Open Variation-Labourdonnais-Löwenthal Variation-Kalashnikov/Löwenthal Variation |
| 1 e4 c5 2 Nf3 Nc6 3 d4 cxd4 4 Nxd4 g6 | B32 | Sicilian Defence-Old Sicilian Defence-Open Variation-Accelerated Dragon |
| 1 e4 c5 2 Nf3 Nc6 3 d4 cxd4 4 Nxd4 g6 5 c4 | B36 | Sicilian Defence-Open Variation-Accelerated Dragon-Maróczy Bind |
| 1 e4 c5 2 Nf3 Nc6 3 d4 cxd4 4 Nxd4 g6 5 c4 Bg7 | B37 | Sicilian Defence-Open Variation-Accelerated Dragon-Maróczy Bind |
| 1 e4 c5 2 Nf3 Nc6 3 d4 cxd4 4 Nxd4 g6 5 c4 Bg7 6 Be3 | B38 | Sicilian Defence-Open Variation-Accelerated Dragon-Maróczy Bind |
| 1 e4 c5 2 Nf3 Nc6 3 d4 cxd4 4 Nxd4 g6 5 c4 Bg7 6 Be3 Nf6 7 Nc3 Ng4 | B39 | Sicilian Defence-Accelerated Dragon-Maróczy Bind-Breyer Variation |
| 1 e4 c5 2 Nf3 Nc6 3 d4 cxd4 4 Nxd4 g6 5 c4 Bg7 6 Nc2 d6 7 Be2 Nh6 | B37 | Sicilian Defence-Accelerated Dragon-Maróczy Bind-Simagin Variation |
| 1 e4 c5 2 Nf3 Nc6 3 d4 cxd4 4 Nxd4 g6 5 c4 Nf6 6 Nc3 Nxd4 7 Qxd4 d6 | B36 | Sicilian Defence-Accelerated Dragon-Maróczy Bind-Gurgenidze Variation |
| 1 e4 c5 2 Nf3 Nc6 3 d4 cxd4 4 Nxd4 g6 5 Nc3 | B34 | Sicilian Defence-Open Variation-Accelerated Dragon-Modern/Simagin Variation |
| 1 e4 c5 2 Nf3 Nc6 3 d4 cxd4 4 Nxd4 g6 5 Nc3 Bg7 6 Be3 Nf6 7 Bc4 | B35 | Sicilian Defence-Open Variation-Accelerated Dragon-Modern Variation |
| 1 e4 c5 2 Nf3 Nc6 3 d4 cxd4 4 Nxd4 g6 5 Nxc6 | B34 | Sicilian Defence-Open Variation-Accelerated Dragon-Exchange Variation |
| 1 e4 c5 2 Nf3 Nc6 3 d4 cxd4 4 Nxd4 Nf6 | B33 | Sicilian Defence-Old Sicilian Defence-Open Variation-Pelikán/Normal Variation |
| 1 e4 c5 2 Nf3 Nc6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 d6 6 Be2 | B58 | Sicilian Defence-Open Variation-Pelikán Variation-Classical Variation |
| 1 e4 c5 2 Nf3 Nc6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 d6 6 Be2 e5 | B58 | Sicilian Defence-Pelikán Variation-Classical Variation-Boleslavsky Variation |
| 1 e4 c5 2 Nf3 Nc6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 d6 6 Be2 e5 7 Nb3 | B59 | Sicilian Defence-Pelikán Variation-Classical Variation-Boleslavsky Variation |
| 1 e4 c5 2 Nf3 Nc6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 d6 6 Be2 e5 7 Nxc6 | B58 | Sicilian Defence-Pelikán Variation-Boleslavsky Variation-Louma Variation |
| 1 e4 c5 2 Nf3 Nc6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 d6 6 Bg5 | B60 | Old Sicilian Defence-Open Variation-Pelikán Variation-Richter Variation |
| 1 e4 c5 2 Nf3 Nc6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 d6 6 Bg5 Bd7 | B60 | Old Sicilian Defence-Pelikán Variation-Richter Variation-Larsen Variation |
| 1 e4 c5 2 Nf3 Nc6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 d6 6 Bg5 Bd7 7 Qd2 | B61 | Old Sicilian Defence-Pelikán Variation-Richter Variation-Larsen Variation |
| 1 e4 c5 2 Nf3 Nc6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 d6 6 Bg5 e6 | B62 | Old Sicilian Defence-Open Variation-Pelikán Variation-Richter Variation |
| 1 e4 c5 2 Nf3 Nc6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 d6 6 Bg5 e6 7 Bb5 | B62 | Old Sicilian Defence-Pelikán Variation-Richter Variation-Margate Variation |
| 1 e4 c5 2 Nf3 Nc6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 d6 6 Bg5 e6 7 Nb3 | B62 | Old Sicilian Defence-Pelikán Variation-Richter Variation-Podebrady Variation |
| 1 e4 c5 2 Nf3 Nc6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 d6 6 Bg5 e6 7 Nxc6 | B62 | Old Sicilian Defence-Pelikán Variation-Richter Variation-Exchange Variation |
| 1 e4 c5 2 Nf3 Nc6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 d6 6 Bg5 e6 7 Qd2 | B63 | Old Sicilian Defence-Pelikán Variation-Richter Variation-Rauzer Variation |
| 1 e4 c5 2 Nf3 Nc6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 d6 6 Bg5 e6 7 Qd2 a6 | B66 | Old Sicilian Defence-Richter Variation-Rauzer Variation-Modern Variation |
| 1 e4 c5 2 Nf3 Nc6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 d6 6 Bg5 e6 7 Qd2 a6 8 0-0-0 Bd7 | B67 | Old Sicilian Defence-Richter Variation-Rauzer Variation-Modern Variation |
| 1 e4 c5 2 Nf3 Nc6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 d6 6 Bg5 e6 7 Qd2 a6 8 0-0-0 Bd7 9 f4 Be7 | B68 | Old Sicilian Defence-Richter Variation-Rauzer Variation-Modern Variation |
| 1 e4 c5 2 Nf3 Nc6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 d6 6 Bg5 e6 7 Qd2 a6 8 0-0-0 Bd7 9 f4 Be7 10 Nf3 b5 11 Bxf6 | B69 | Old Sicilian Defence-Richter Variation-Rauzer Variation-Modern Variation |
| 1 e4 c5 2 Nf3 Nc6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 d6 6 Bg5 e6 7 Qd2 Be7 | B63 | Old Sicilian Defence-Richter Variation-Rauzer Variation-Classical Variation |
| 1 e4 c5 2 Nf3 Nc6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 d6 6 Bg5 e6 7 Qd2 Be7 8 0-0-0 0-0 9 f4 | B64 | Old Sicilian Defence-Richter Variation-Rauzer Variation-Classical Variation |
| 1 e4 c5 2 Nf3 Nc6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 d6 6 Bg5 e6 7 Qd2 Be7 8 0-0-0 0-0 9 f4 e5 | B64 | Old Sicilian Defence-Rauzer Variation-Classical Variation-Geller Variation |
| 1 e4 c5 2 Nf3 Nc6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 d6 6 Bg5 e6 7 Qd2 Be7 8 0-0-0 0-0 9 f4 Nxd4 10 Qxd4 | B65 | Old Sicilian Defence-Open Variation-Pelikán Variation-Rauzer Variation-Classical Variation |
| 1 e4 c5 2 Nf3 Nc6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 d6 6 Bg5 e6 7 Qd2 h6 | B63 | Old Sicilian Defence-Richter Variation-Rauzer Variation-Botvinnik Variation |
| 1 e4 c5 2 Nf3 Nc6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 d6 6 Bg5 e6 7 Qd3 | B62 | Old Sicilian Defence-Pelikán Variation-Richter Variation-Keres Variation |
| 1 e4 c5 2 Nf3 Nc6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 d6 6 Bg5 g6 | B60 | Old Sicilian Defence-Pelikán Variation-Richter Variation-Bondarevsky Variation |
| 1 e4 c5 2 Nf3 Nc6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 e5 | B33 | Sicilian Defence-Open Variation-Pelikán Variation-Lasker Variation |
| 1 e4 c5 2 Nf3 Nc6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 e5 6 Nb3 | B33 | Sicilian Defence-Pelikán Variation-Lasker Variation-Schlechter Variation |
| 1 e4 c5 2 Nf3 Nc6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 e5 6 Ndb5 d6 7 Bg5 a6 8 Na3 b5 (9 Nd5) | B33 | Sicilian Defence-Pelikán Variation-Lasker Variation-Chelyabinsk Variation |
| 1 e4 c5 2 Nf3 Nc6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 e5 6 Ndb5 d6 7 Bg5 a6 8 Na3 b5 9 Bxf6 gxf6 10 Nd5 Bg7 | B33 | Sicilian Defence-Pelikán Variation-Chelyabinsk Variation-Novosibirsk Variation |
| 1 e4 c5 2 Nf3 Nc6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 e5 6 Ndb5 d6 7 Bg5 a6 8 Na3 b5 9 Bxf6 gxf6 10 Nd5 f5 | B33 | Sicilian Defence-Pelikán Variation-Chelyabinsk Variation-Sveshnikov Variation |
| 1 e4 c5 2 Nf3 Nc6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 e5 6 Ndb5 d6 7 Bg5 a6 8 Na3 b5 9 Bxf6 gxf6 10 Nd5 f5 11 Bxb5 | B33 | Sicilian Defence-Chelyabinsk Variation-Sveshnikov Variation-Peresypkin's Sacrifice |
| 1 e4 c5 2 Nf3 Nc6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 e5 6 Ndb5 d6 7 Bg5 a6 8 Na3 Be6 | B33 | Sicilian Defence-Pelikán Variation-Lasker Variation-Bird Variation |
| 1 e4 c5 2 Nf3 Nc6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 e5 6 Nf3 | B33 | Sicilian Defence-Pelikán Variation-Lasker Variation-Retreat Variation |
| 1 e4 c5 2 Nf3 Nc6 3 d4 cxd4 4 Nxd4 Nf6 5 Nc3 e5 6 Nxc6 | B33 | Sicilian Defence-Pelikán Variation-Lasker Variation-Exchange Variation |
| 1 e4 c5 2 Nf3 Nc6 3 d4 cxd4 4 Nxd4 Qb6 | B32 | Sicilian Defence-Old Sicilian Defence-Open Variation-Godiva Variation |
| 1 e4 c5 2 Nf3 Nc6 3 d4 cxd4 4 Nxd4 Qc7 | B32 | Sicilian Defence-Old Sicilian Defence-Open Variation-Flohr Variation |
| 1 e4 c5 2 Nf3 Nc6 3 d4 e6 | B32 | Sicilian Defence-Old Sicilian Defence-Open Variation-Franco-Scilian Variation |
| 1 e4 c5 2 Nf3 Nf6 | B29 Explore | King's Pawn-Sicilian Defence-King's Knight Variation-Nimzowitsch-Rubinstein Variation |
| 1 e4 c5 2 Nf3 Nf6 3 e5 | B29 | Sicilian Defence-King's Knight Variation-Nimzowitsch-Rubinstein Variation-Advance Variation |
| 1 e4 c5 2 Nf3 Nf6 3 e5 Nd5 4 Nc3 e6 5 Nxd5 exd5 6 d4 Nc6 | B29 | Sicilian Defence-Nimzowitsch-Rubinstein Variation-Advance Variation-Rubinstein/Main Countergambit |
| 1 e4 c5 2 Nf3 Nf6 3 e5 Nd5 4 Nc3 Nxc3 | B29 | Sicilian Defence-Nimzowitsch-Rubinstein Variation-Advance Variation-Exchange Variation |
| 1 e4 c5 2 Nf3 Nf6 3 Nc3 | B29 | Sicilian Defence-King's Knight Variation-Nimzowitsch-Rubinstein Variation-Closed Variation |
| 1 e4 c5 2 Nf3 Qa5 | B27 Explore | King's Pawn-Sicilian Defence-King's Knight Variation-Stilletto/Althouse/Mongoose Variation |
| 1 e4 c5 2 Nf3 Qc7 | B27 Explore | King's Pawn-Sicilian Defence-King's Knight Variation-Quinteros Variation |
| 1 e4 c5 2 Nh3 | B20 Explore | King's Pawn-Sicilian Defence-The Brick |
| 1 e4 c5 2 Qg4 | B20 Explore | King's Pawn-Sicilian Defence-Amazon Attack |
| 1 e4 c6 | B10 Explore | King's Pawn-Caro-Kann Defence |
| 1 e4 c6 2 b3 | B10 Explore | King's Pawn-Caro-Kann Defence-Euwe Attack |
| 1 e4 c6 2 b4 | B10 Explore | King's Pawn-Caro-Kann Defence-Labahn Attack |
| 1 e4 c6 2 b4 d5 3 b5 | B10 | King's Pawn-Caro-Kann Defence-Labahn Attack-Double Gambit |
| 1 e4 c6 2 b4 e5 3 Bb2 | B10 | King's Pawn-Caro-Kann Defence-Labahn Attack-Polish Variation |
| 1 e4 c6 2 Bc4 | B10 Explore | King's Pawn-Caro-Kann Defence-Hillbilly Attack |
| 1 e4 c6 2 Bc4 d5 3 Bb3 dxe4 4 Qh5 | B10 | King's Pawn-Caro-Kann Defence-Hillbilly Attack-Schaeffer Gambit |
| 1 e4 c6 2 c4 | B10 Explore | King's Pawn-Caro-Kann Defence-Anti-Caro-Kann Defence/Accelerated Panov Attack |
| 1 e4 c6 2 c4 d5 | B10 | King's Pawn-Caro-Kann Defence-Accelerated Panov Attack-Anti-Anti-Caro-Kann Defence |
| 1 e4 c6 2 c4 d5 3 cxd5 cxd5 4 Qb3 | B10 | Caro-Kann Defence-Accelerated Panov Attack-Anti-Anti-Caro-Kann Defence-Van Weersel Attack |
| 1 e4 c6 2 c4 d5 3 e5 | B10 | King's Pawn-Caro-Kann Defence-Accelerated Panov Attack-Anti-Anti-Caro-Kann Defence-Toikkanen Gambit |
| 1 e4 c6 2 c4 d5 3 exd5 cxd5 4 cxd5 Nf6 | B10 | Caro-Kann Defence-Accelerated Panov Attack-Anti-Anti-Caro-Kann Defence-Modern Variation |
| 1 e4 c6 2 c4 d5 3 exd5 Qxd5 | B10 | Caro-Kann Defence-Accelerated Panov Attack-Anti-Anti-Caro-Kann Defence-Pseudo-Scandinavian Variation |
| 1 e4 c6 2 c4 e5 | B10 | King's Pawn-Caro-Kann Defence-Accelerated Panov Attack-Open Variation |
| 1 e4 c6 2 d3 | B10 Explore | King's Pawn-Caro-Kann Defence-Closed/Breyer Variation |
| 1 e4 c6 2 d3 d5 3 Nd2 g6 4 g3 Bg7 5 Bg2 e5 6 Ngf3 Ne7 7 0-0 0-0 8 b4 | B10 | King's Pawn-Caro-Kann Defence-Breyer Variation-Stein Attack |
| 1 e4 c6 2 d4 | B12 Explore | King's Pawn-Caro-Kann Defence |
| 1 e4 c6 2 d4 d5 3 Bd3 Nf6 4 e5 Nfd7 5 e6 | B12 | King's Pawn-Caro-Kann Defence-Mieses Attack-Landau Gambit |
| 1 e4 c6 2 d4 d5 3 Be3 (dxe4) | B12 | King's Pawn-Caro-Kann Defence-Mieses Gambit |
| 1 e4 c6 2 d4 d5 3 e5 | B12 Explore | King's Pawn-Caro-Kann Defence-Advance Variation |
| 1 e4 c6 2 d4 d5 3 e5 Bf5 4 b4 | B12 | King's Pawn-Caro-Kann Defence-Advance Variation-Prins Attack |
| 1 e4 c6 2 d4 d5 3 e5 Bf5 4 c3 e6 5 Be2 | B12 | King's Pawn-Caro-Kann Defence-Advance Variation-Short Variation |
| 1 e4 c6 2 d4 d5 3 e5 Bf5 4 g4 | B12 | King's Pawn-Caro-Kann Defence-Advance Variation-Bayonet Attack |
| 1 e4 c6 2 d4 d5 3 e5 Bf5 4 h4 | B12 | King's Pawn-Caro-Kann Defence-Advance Variation-Tal Variation |
| 1 e4 c6 2 d4 d5 3 e5 Bf5 4 Nc3 | B12 | King's Pawn-Caro-Kann Defence-Advance Variation-Van der Wiel Attack |
| 1 e4 c6 2 d4 d5 3 e5 Bf5 4 Nc3 e6 5 g4 Bg6 6 Nge2 c5 7 h4 | B12 | Caro-Kann Defence-Advance Variation-Van der Wiel Attack-Bishop Hnt |
| 1 e4 c6 2 d4 d5 3 e5 Bf5 4 Nc3 Qb6 | B12 | Caro-Kann Defence-Advance Variation-Van der Wiel Attack-Dreyev Defence |
| 1 e4 c6 2 d4 d5 3 e5 Bf5 4 Ne2 | B12 | King's Pawn-Caro-Kann Defence-Advance Variation-Bronstein Variation |
| 1 e4 c6 2 d4 d5 3 e5 Bf5 4 Nf3 | B12 | King's Pawn-Caro-Kann Defence-Advance Variation-Short Variation |
| 1 e4 c6 2 d4 d5 3 e5 c5 | B12 | King's Pawn-Caro-Kann Defence-Advance Variation-Botvinnik-Carls Defence |
| 1 e4 c6 2 d4 d5 3 exd5 | B13 Explore | King's Pawn-Caro-Kann Defence-Exchange Variation |
| 1 e4 c6 2 d4 d5 3 exd5 cxd5 4 Bd3 Nc6 5 c3 Nf6 6 Bf4 | B13 | King's Pawn-Caro-Kann Defence-Exchange Variation-Rubinstein Variation |
| 1 e4 c6 2 d4 d5 3 exd5 cxd5 4 c4 | B13 | King's Pawn-Caro-Kann Defence-Exchange Variation-Panov-Botvinnik Attack |
| 1 e4 c6 2 d4 d5 3 exd5 cxd5 4 c4 Nf6 5 c5 | B13 | Caro-Kann Defence-Exchange Variation-Panov-Botvinnik Attack-Gunderam Attack |
| 1 e4 c6 2 d4 d5 3 exd5 cxd5 4 c4 Nf6 5 Nc3 | B13 | Caro-Kann Defence-Exchange Variation-Panov-Botvinnik Attack-Panov Attack |
| 1 e4 c6 2 d4 d5 3 exd5 cxd5 4 c4 Nf6 5 Nc3 e6 | B14 | Caro-Kann Defence-Exchange Variation-Panov-Botvinnik Attack-Panov Attack |
| 1 e4 c6 2 d4 d5 3 exd5 cxd5 4 c4 Nf6 5 Nc3 e6 6 Bg5 Nc6 | B14 | Caro-Kann Defence-Panov-Botvinnik Attack-Panov Attack-Carlsbad Variation |
| 1 e4 c6 2 d4 d5 3 exd5 cxd5 4 c4 Nf6 5 Nc3 g6 | B14 | Caro-Kann Defence-Panov-Botvinnik Attack-Panov Attack-Fianchetto Defence |
| 1 e4 c6 2 d4 d5 3 exd5 cxd5 4 c4 Nf6 5 Nc3 g6 6 cxd5 Bg7 | B14 | Caro-Kann Defence-Panov Attack-Fianchetto Defence-Fianchetto Gambit |
| 1 e4 c6 2 d4 d5 3 exd5 cxd5 4 c4 Nf6 5 Nc3 Nc6 | B13 | Caro-Kann Defence-Panov-Botvinnik Attack-Panov Attack-Modern Defence |
| 1 e4 c6 2 d4 d5 3 exd5 cxd5 4 c4 Nf6 5 Nc3 Nc6 6 Bg5 | B13 | Caro-Kann Defence-Panov Attack-Modern Defence-Botvinnik Variation |
| 1 e4 c6 2 d4 d5 3 exd5 cxd5 4 c4 Nf6 5 Nc3 Nc6 6 Bg5 dxc4 7 d5 Na5 | B13 | Caro-Kann Defence-Modern Defence-Botvinnik Variation-Herzog Defence |
| 1 e4 c6 2 d4 d5 3 exd5 cxd5 4 c4 Nf6 5 Nc3 Nc6 6 Bg5 e6 | B13 | Caro-Kann Defence-Modern Defence-Botvinnik Variation-Normal/Carlsbad Line |
| 1 e4 c6 2 d4 d5 3 exd5 cxd5 4 c4 Nf6 5 Nc3 Nc6 6 Bg5 Qa5 | B13 | Caro-Kann Defence-Modern Defence-Botvinnik Variation-Czerniak Line |
| 1 e4 c6 2 d4 d5 3 exd5 cxd5 4 c4 Nf6 5 Nc3 Nc6 6 Bg5 Qb6 | B13 | Caro-Kann Defence-Modern Defence-Botvinnik Variation-Reifir-Spielmann Line |
| 1 e4 c6 2 d4 d5 3 exd5 cxd5 4 c4 Nf6 5 Nc3 Nc6 6 Nf3 Bg4 | B13 | Caro-Kann Defence-Panov Attack-Modern Defence-Mieses Line |
| 1 e4 c6 2 d4 d5 3 exd5 cxd5 4 g4 | B13 | King's Pawn-Caro-Kann Defence-Exchange Variation-Bulla Attack |
| 1 e4 c6 2 d4 d5 3 f3 | B12 Explore | King's Pawn-Caro-Kann Defence-Tartakower/Fantasy/Maróczy Variation |
| 1 e4 c6 2 d4 d5 3 f3 dxe4 4 fxe4 e5 5 Nf3 exd4 6 Bc4 | B12 | King's Pawn-Caro-Kann Defence-Tartakower Variation-Maroczy Gambit |
| 1 e4 c6 2 d4 d5 3 Nc3 | B15 Explore | King's Pawn-Caro-Kann Defence-Traditional/Standard Variation |
| 1 e4 c6 2 d4 d5 3 Nc3 b5 | B15 | King's Pawn-Caro-Kann Defence-Traditional Variation-Gurgenidze Counterattack |
| 1 e4 c6 2 d4 d5 3 Nc3 dxe4 4 Bc4 | B15 | King's Pawn-Caro-Kann Defence-Traditional Variation-Von Hennig Gambit |
| 1 e4 c6 2 d4 d5 3 Nc3 dxe4 4 f3 | B15 | King's Pawn-Caro-Kann Defence-Traditional Variation-Rasa-Studier Gambit |
| 1 e4 c6 2 d4 d5 3 Nc3 dxe4 4 Nxe4 | B15 | King's Pawn-Caro-Kann Defence-Traditional Variation-Main Line |
| 1 e4 c6 2 d4 d5 3 Nc3 dxe4 4 Nxe4 Bf5 | B18 | Caro-Kann Defence-Traditional Variation-Main Line-Classical Variation |
| 1 e4 c6 2 d4 d5 3 Nc3 dxe4 4 Nxe4 Bf5 5 Ng3 Bg6 6 f4 | B18 | Caro-Kann Defence-Main Line-Classical Variation-Maróczy Attack |
| 1 e4 c6 2 d4 d5 3 Nc3 dxe4 4 Nxe4 Bf5 5 Ng3 Bg6 6 h4 h6 7 Nf3 Nd7 | B19 | Caro-Kann Defence-Traditional Variation-Main Line-Classical Variation |
| 1 e4 c6 2 d4 d5 3 Nc3 dxe4 4 Nxe4 Bf5 5 Ng3 Bg6 6 h4 h6 7 Nf3 Nd7 8 h5 | B19 | Caro-Kann Defence-Main Line-Classical Variation-Spassky Variation |
| 1 e4 c6 2 d4 d5 3 Nc3 dxe4 4 Nxe4 Bf5 5 Ng3 Bg6 6 h4 h6 7 Nf3 Nd7 8 h5 Bh7 9 Bd3 Bxd3 10 Qxd3 (e6 11 Bd2 Ngf6 12 0-0-0 Bd6) | B19 | Caro-Kann Defence-Classical Variation-Spassky Variation-Seirawan Variation |
| 1 e4 c6 2 d4 d5 3 Nc3 dxe4 4 Nxe4 Bf5 5 Ng3 Bg6 6 h4 h6 7 Nf3 Nd7 8 h5 Bh7 9 Bd3 Bxd3 10 Qxd3 e6 11 Bd2 Ngf6 12 0-0-0 Be7 | B19 | Caro-Kann Defence-Spassky Variation-Seirawan Variation-Lobron System |
| 1 e4 c6 2 d4 d5 3 Nc3 dxe4 4 Nxe4 Bf5 5 Ng3 Bg6 6 Nh3 | B18 | Caro-Kann Defence-Main Line-Classical Variation-Flohr Variation |
| 1 e4 c6 2 d4 d5 3 Nc3 dxe4 4 Nxe4 h6 | B16 | Caro-Kann Defence-Traditional Variation-Main Line-Finnish Variation |
| 1 e4 c6 2 d4 d5 3 Nc3 dxe4 4 Nxe4 Nd7 | B17 | Caro-Kann Defence-Traditional Variation-Main Line-Steinitz/Karpov Variation |
| 1 e4 c6 2 d4 d5 3 Nc3 dxe4 4 Nxe4 Nd7 5 Bc4 Ngf6 6 Ng5 e6 7 Qe2 Nb6 | B17 | Caro-Kann Defence-Main Line-Karpov Variation-Smyslov Variation |
| 1 e4 c6 2 d4 d5 3 Nc3 dxe4 4 Nxe4 Nd7 5 Bc4 Ngf6 6 Ng5 e6 7 Qe2 Nb6 8 Bb3 | B17 | Caro-Kann Defence-Karpov Variation-Smyslov Variation-Main Line |
| 1 e4 c6 2 d4 d5 3 Nc3 dxe4 4 Nxe4 Nd7 5 Bc4 Ngf6 6 Nxf6+ Nxf6 | B17 | Caro-Kann Defence-Main Line-Karpov Variation-Tiviakov-Fischer Attack |
| 1 e4 c6 2 d4 d5 3 Nc3 dxe4 4 Nxe4 Nd7 5 Nf3 Ngf6 6 Ng3 | B17 | Caro-Kann Defence-Main Line-Karpov Variation-Kasparov Attack |
| 1 e4 c6 2 d4 d5 3 Nc3 dxe4 4 Nxe4 Nd7 5 Ng5 | B17 | Caro-Kann Defence-Main Line-Karpov Variation-Modern Variation |
| 1 e4 c6 2 d4 d5 3 Nc3 dxe4 4 Nxe4 Nd7 5 Ng5 Ndf6 | B17 | Caro-Kann Defence-Karpov Variation-Modern Variation-Ivanchuk Defence |
| 1 e4 c6 2 d4 d5 3 Nc3 dxe4 4 Nxe4 Nd7 5 Ng5 Ngf6 6 Bd3 e6 7 N1f3 Bd6 8 Qe2 h6 9 Ne4 Nxe4 10 Qxe4 | B17 | Caro-Kann Defence-Main Line-Karpov Variation-Modern Main Line |
| 1 e4 c6 2 d4 d5 3 Nc3 dxe4 4 Nxe4 Nf6 | B15 | Caro-Kann Defence-Traditional Variation-Main Line-Knight Variation |
| 1 e4 c6 2 d4 d5 3 Nc3 dxe4 4 Nxe4 Nf6 5 Bd3 | B15 | Caro-Kann Defence-Traditional Variation-Knight Variation-Alekhine Gambit |
| 1 e4 c6 2 d4 d5 3 Nc3 dxe4 4 Nxe4 Nf6 5 Nxf6+ exf6 | B15 | Caro-Kann Defence-Traditional Variation-Knight Variation-Tartakower/Nimzowitsch Variation |
| 1 e4 c6 2 d4 d5 3 Nc3 dxe4 4 Nxe4 Nf6 5 Nxf6+ exf6 6 Bc4 | B15 | Caro-Kann Defence-Knight Variation-Tartakower Variation-Forgács Variation |
| 1 e4 c6 2 d4 d5 3 Nc3 dxe4 4 Nxe4 Nf6 5 Nxf6+ gxf6 | B16 | Caro-Kann Defence-Traditional Variation-Knight Variation-Bronstein-Larsen/Nimzovich Variation |
| 1 e4 c6 2 d4 d5 3 Nc3 g6 | B15 | King's Pawn-Caro-Kann Defence-Traditional Variation-Gurgenidze System |
| 1 e4 c6 2 d4 d5 3 Nc3 g6 4 e5 Bg7 5 f4 h5 | B15 | Caro-Kann Defence-Traditional Variation-Gurgenidze System-Robatsch Variation |
| 1 e4 c6 2 d4 d5 3 Nc3 Nf6 | B15 | King's Pawn-Caro-Kann Defence-Traditional Variation-Campomanes Variation |
| 1 e4 c6 2 d4 d5 3 Nd2 | B12 Explore | King's Pawn-Caro-Kann Defence-Modern Variation |
| 1 e4 c6 2 d4 d5 3 Nd2 Qb6 | B12 | King's Pawn-Caro-Kann Defence-Modern Variation-Edinburgh Variation |
| 1 e4 c6 2 d4 d5 3 Nf3 dxe4 4 Ng5 | B12 | King's Pawn-Caro-Kann Defence-Ulysses Gambit |
| 1 e4 c6 2 d4 f5 | B12 Explore | King's Pawn-Caro-Kann Defence-Massachussets Defence |
| 1 e4 c6 2 d4 Na6 (3 Nc3 Nc7) | B12 Explore | King's Pawn-Caro-Kann Defence-De Bruycker Defence |
| 1 e4 c6 2 d4 Nf6 | B12 Explore | King's Pawn-Caro-Kann Defence-Caro-Masi Defence |
| 1 e4 c6 2 g4 | B10 Explore | King's Pawn-Caro-Kann Defence-Spike Variation |
| 1 e4 c6 2 Nc3 d5 3 d3 dxe4 4 Bg5 | B10 | King's Pawn-Caro-Kann Defence-Scorpion-Horus Gambit |
| 1 e4 c6 2 Nc3 d5 3 Nf3 | B10 | King's Pawn-Caro-Kann Defence-2 Knights Attack |
| 1 e4 c6 2 Nc3 d5 3 Nf3 Bg4 | B11 | King's Pawn-Caro-Kann Defence-2 Knights Attack-Mindeno Variation |
| 1 e4 c6 2 Nc3 d5 3 Nf3 Bg4 4 h3 Bh5 | B11 | King's Pawn-Caro-Kann Defence-2 Knights Attack-Mindeno Variation-Retreat Line |
| 1 e4 c6 2 Nc3 d5 3 Nf3 Bg4 4 h3 Bxf3 | B11 | Caro-Kann Defence-2 Knights Attack-Mindeno Variation-Exchange Line |
| 1 e4 c6 2 Nc3 d5 3 Nf3 Bg4 4 h3 Bxf3 5 Qxf3 e6 6 d4 dxe4 7 Nxe4 Qxd4 8 Bd3 | B11 | Caro-Kann Defence-Mindeno Variation-Exchange Line-Boleslavsky Variation |
| 1 e4 c6 2 Nc3 d5 3 Nf3 dxe4 4 Ng5 | B10 | King's Pawn-Caro-Kann Defence-2 Knights Attack-Hector Gambit |
| 1 e4 c6 2 Nc3 d5 3 Qf3 | B10 | King's Pawn-Caro-Kann Defence-Goldman/Spielmann Variation |
| 1 e4 d5 | B01 Explore | King's Pawn-Centre Countergambit/Scandinavian Defence |
| 1 e4 d5 2 b3 | B01 Explore | King's Pawn-Centre Countergambit-Unnamed Gambit |
| 1 e4 d5 2 b4 | B01 Explore | King's Pawn-Centre Countergambit-Zilbermints Gambit |
| 1 e4 d5 2 exd5 c6 | B01 Explore | King's Pawn-Centre Countergambit-Blackburne-Kloosterboer Gambit |
| 1 e4 d5 2 exd5 c6 3 dxc6 e5 | B01 | King's Pawn-Centre Countergambit-Blackburne-Kloosterboer Gambit-Kloosterboer Gambit |
| 1 e4 d5 2 exd5 c6 3 dxc6 Nxc6 | B01 | King's Pawn-Centre Countergambit-Blackburne-Kloosterboer Gambit-Blackburne Gambit |
| 1 e4 d5 2 exd5 e5 3 dxe6ep Bxe6 | B01 | King's Pawn-Centre Countergambit-Boehnke Gambit |
| 1 e4 d5 2 exd5 Nf6 | B01 Explore | King's Pawn-Centre Countergambit-Modern Variation |
| 1 e4 d5 2 exd5 Nf6 3 Bb5+ | B01 Explore | King's Pawn-Centre Countergambit-Modern Variation-Burn Variation |
| 1 e4 d5 2 exd5 Nf6 3 Bb5+ Bd7 4 Be2 | B01 | Centre Countergambit-Modern Variation-Burn Variation-Bronstein Variation |
| 1 e4 d5 2 exd5 Nf6 3 c4 c6 | B01 | King's Pawn-Centre Countergambit-Modern Variation-Scandinavian Gambit/Panov Transfer |
| 1 e4 d5 2 exd5 Nf6 3 c4 e6 | B01 | King's Pawn-Centre Countergambit-Modern Variation-Icelandic-Palme Gambit |
| 1 e4 d5 2 exd5 Nf6 3 d4 Bg4 | B01 | King's Pawn-Centre Countergambit-Modern Variation-Portuguese Variation |
| 1 e4 d5 2 exd5 Nf6 3 d4 Bg4 4 f3 Bf5 5 Bb5+ Nbd7 | B01 | Centre Countergambit-Modern Variation-Portuguese Variation-Portuguese Gambit |
| 1 e4 d5 2 exd5 Nf6 3 d4 c6 4 dxc6 e5 | B01 | King's Pawn-Centre Countergambit-Modern Variation-Kadas Gambit |
| 1 e4 d5 2 exd5 Nf6 3 d4 g6 | B01 | King's Pawn-Centre Countergambit-Modern Variation-Richter Variation |
| 1 e4 d5 2 exd5 Nf6 3 d4 g6 4 c4 b5 | B01 | Centre Countergambit-Modern Variation-Richter Variation-Wing Gambit |
| 1 e4 d5 2 exd5 Nf6 3 d4 Nc6 4 Nc3 | B01 | King's Pawn-Centre Countergambit-Modern Variation-Nimzovich Variation |
| 1 e4 d5 2 exd5 Nf6 3 d4 Nxd5 | B01 | King's Pawn-Centre Countergambit-Modern Variation-Marshall Variation |
| 1 e4 d5 2 exd5 Nf6 3 d4 Nxd5 4 c4 Nb4 | B01 | Centre Countergambit-Modern Variation-Marshall Variation-Kiel Variation |
| 1 e4 d5 2 exd5 Nf6 3 d4 Nxd5 4 Nf3 Bg4 | B01 | Centre Countergambit-Modern Variation-Marshall Variation-Gipslis Variation |
| 1 e4 d5 2 exd5 Nf6 3 d4 Nxd5 4 Nf3 g6 | B01 | Centre Countergambit-Modern Variation-Marshall Variation-Richter Variation |
| 1 e4 d5 2 exd5 Qxd5 | B01 Explore | King's Pawn-Centre Countergambit-Mieses-Kotroc/Classical Gambit |
| 1 e4 d5 2 exd5 Qxd5 3 Nc3 Qa5 | B01 | King's Pawn-Centre Countergambit-Mieses-Kotroc Gambit-Main Lines |
| 1 e4 d5 2 exd5 Qxd5 3 Nc3 Qa5 4 b4 | B01 | Centre Countergambit-Mieses-Kotroc Gambit-Main Lines-Leonhardt/Kortc Gambit |
| 1 e4 d5 2 exd5 Qxd5 3 Nc3 Qa5 4 d4 e5 | B01 | King's Pawn-Centre Countergambit-Anderssen Counterattack |
| 1 e4 d5 2 exd5 Qxd5 3 Nc3 Qa5 4 d4 e5 5 dxe5 Bb4 6 Bd2 Nc6 7 Nf3 | B01 | King's Pawn-Centre Countergambit-Anderssen Counterattack-Orthodox Attack |
| 1 e4 d5 2 exd5 Qxd5 3 Nc3 Qa5 4 d4 e5 5 Nf3 | B01 | King's Pawn-Centre Countergambit-Anderssen Counterattack-Göteborg System |
| 1 e4 d5 2 exd5 Qxd5 3 Nc3 Qa5 4 d4 e5 5 Nf3 Bg4 | B01 | Centre Countergambit-Anderssen Counterattack-Goteborg System-Collijn Variation |
| 1 e4 d5 2 exd5 Qxd5 3 Nc3 Qa5 4 d4 Nf6 | B01 | Centre Countergambit-Mieses-Kotroc Gambit-Main Lines-Mieses Variation |
| 1 e4 d5 2 exd5 Qxd5 3 Nc3 Qa5 4 d4 Nf6 5 Nf3 Bf5 | B01 | King's Pawn-Centre Countergambit-Mieses Variation-Classical Variation |
| 1 e4 d5 2 exd5 Qxd5 3 Nc3 Qa5 4 d4 Nf6 5 Nf3 Bf5 6 Ne5 c6 7 g4 | B01 | Centre Countergambit-Mieses Variation-Classical Variation-Grünfeld Variation |
| 1 e4 d5 2 exd5 Qxd5 3 Nc3 Qa5 4 d4 Nf6 5 Nf3 Bg4 (6 h3) | B01 | King's Pawn-Centre Countergambit-Mieses Variation-Lasker Variation |
| 1 e4 d5 2 exd5 Qxd5 3 Nc3 Qd6 | B01 | King's Pawn-Centre Countergambit-Pytel-Wade/Gubinsky-Melts/Schiller Defence |
| 1 e4 d5 2 exd5 Qxd5 3 Nc3 Qd6 4 d4 c6 | B01 | King's Pawn-Centre Countergambit-Gubinsky-Melts Defence-Schiller-Pytel Variation |
| 1 e4 d5 2 exd5 Qxd5 3 Nc3 Qd6 4 d4 c6 5 Bc4 Nf6 6 Nge2 Bf5 7 Bf4 Qb4 | B01 | Centre Countergambit-Gubinsky-Melts Defence-Schiller-Pytel Variation-Modern Variation |
| 1 e4 d5 2 exd5 Qxd5 3 Nc3 Qd6 4 d4 Nf6 5 Nf3 a6 | B01 | King's Pawn-Centre Countergambit-Pytel-Wade Variation-Bronstein Variation |
| 1 e4 d5 2 exd5 Qxd5 3 Nc3 Qd8 | B01 | King's Pawn-Centre Countergambit-Mieses-Kotroc Gambit-Viñoles Variation |
| 1 e4 d6 | B07 Explore | King's Pawn-Pirc Defence |
| 1 e4 d6 2 d4 e5 | B07 Explore | King's Pawn-Pirc Defence-Maroczy Defence |
| 1 e4 d6 2 d4 e6 | C00 Explore | King's Pawn-Pirc Defence-Small Centre Defence |
| 1 e4 d6 2 d4 f5 | B07 Explore | King's Pawn-Pirc Defence-Balogh Defence |
| 1 e4 d6 2 d4 Nd7 | B07 Explore | King's Pawn-Pirc Defence-Antal Defence |
| 1 e4 d6 2 d4 Nf6 3 f3 | B07 | King's Pawn-Pirc Defence-Lion's Jaw Variation |
| 1 e4 d6 2 d4 Nf6 3 Nc3 c6 | B07 | King's Pawn-Pirc Defence-Ufimtsev-Pytel/Czech Defence |
| 1 e4 d6 2 d4 Nf6 3 Nc3 g6 4 Bc4 | B07 | King's Pawn-Pirc Defence-Kholmov System |
| 1 e4 d6 2 d4 Nf6 3 Nc3 g6 4 Be2 | B07 | King's Pawn-Pirc Defence-Classical Variation |
| 1 e4 d6 2 d4 Nf6 3 Nc3 g6 4 Be2 Bg7 5 g4 | B07 | King's Pawn-Pirc Defence-Classical Variation-Chinese Variation |
| 1 e4 d6 2 d4 Nf6 3 Nc3 g6 4 Be2 Bg7 5 h4 | B07 | King's Pawn-Pirc Defence-Classical Variation-Bayonet/Mariotti Attack |
| 1 e4 d6 2 d4 Nf6 3 Nc3 g6 4 Be3 c6 5 h3 | B07 | King's Pawn-Pirc Defence-Sveshnikov-Jansa Attack |
| 1 e4 d6 2 d4 Nf6 3 Nc3 g6 4 Be3 c6 5 Qd2 | B07 | King's Pawn-Pirc Defence-150 Attack |
| 1 e4 d6 2 d4 Nf6 3 Nc3 g6 4 Be3 c6 5 Qd2 Bg4 | B07 | King's Pawn-Pirc Defence-150 Attack-Inner Doll Defence |
| 1 e4 d6 2 d4 Nf6 3 Nc3 g6 4 Bg5 | B07 | King's Pawn-Pirc Defence-Byrne Variation |
| 1 e4 d6 2 d4 Nf6 3 Nc3 g6 4 f4 | B09 | King's Pawn-Pirc Defence-Austrian Attack |
| 1 e4 d6 2 d4 Nf6 3 Nc3 g6 4 f4 Bg7 5 Bc4 | B09 | King's Pawn-Pirc Defence-Austrian Attack-Ljubojevic Variation |
| 1 e4 d6 2 d4 Nf6 3 Nc3 g6 4 f4 Bg7 5 Nf3 0-0 6 Bd3 | B09 | King's Pawn-Pirc Defence-Austrian Attack-Weiss Variation |
| 1 e4 d6 2 d4 Nf6 3 Nc3 g6 4 f4 Bg7 5 Nf3 0-0 6 Be3 | B09 | King's Pawn-Pirc Defence-Austrian Attack-Kurajica Variation |
| 1 e4 d6 2 d4 Nf6 3 Nc3 g6 4 f4 Bg7 5 Nf3 0-0 6 e5 | B09 | King's Pawn-Pirc Defence-Austrian Attack-Unzicker Attack |
| 1 e4 d6 2 d4 Nf6 3 Nc3 g6 4 f4 Bg7 5 Nf3 0-0 6 e5 Nfd7 7 h4 | B09 | Pirc Defence-Austrian Attack-Unzicker Attack-Bronstein Variation |
| 1 e4 d6 2 d4 Nf6 3 Nc3 g6 4 f4 Bg7 5 Nf3 c5 | B09 | King's Pawn-Pirc Defence-Austrian Attack-Dragon Formation |
| 1 e4 d6 2 d4 Nf6 3 Nc3 g6 4 g3 | B07 | King's Pawn-Pirc Defence-Sveshnikov System |
| 1 e4 d6 2 d4 Nf6 3 Nc3 g6 4 Nf3 | B08 | King's Pawn-Pirc Defence-Classical/2 Knights System |
| 1 e4 d6 2 d4 Nf6 3 Nc3 g6 4 Nf3 Bg7 | B08 | King's Pawn-Pirc Defence-Classical Variation-2 Knights System |
| 1 e4 d6 2 d4 Nf6 3 Nc3 g6 4 Nf3 Bg7 5 Be2 | B08 | Pirc Defence-Classical Variation-2 Knights System-Quiet System |
| 1 e4 d6 2 d4 Nf6 3 Nc3 g6 4 Nf3 Bg7 5 Be2 0-0 6 0-0 Bg4 | B08 | Pirc Defence-2 Knights System-Quiet System-Parma Defence |
| 1 e4 d6 2 d4 Nf6 3 Nc3 g6 4 Nf3 Bg7 5 Be2 0-0 6 0-0 c6 | B08 | Pirc Defence-2 Knights System-Quiet System-Czech Defence |
| 1 e4 d6 2 d4 Nf6 3 Nc3 g6 4 Nf3 Bg7 5 Be2 0-0 6 0-0 Nc6 | B08 | Pirc Defence-2 Knights System-Quiet System-Chigorin Line |
| 1 e4 d6 2 d4 Nf6 3 Nc3 g6 4 Nf3 Bg7 5 h3 | B08 | King's Pawn-Pirc Defence-2 Knights System-Schlechter Variation |
| 1 e4 d6 2 d4 Nf6 3 Nc3 Nbd7 | B07 | King's Pawn-Pirc Defence-Lion Defence |
| 1 e4 d6 2 d4 Nf6 3 Nc3 Nbd7 4 f4 | B07 | King's Pawn-Pirc Defence-Lion Defence-Anti-Philidor Variation |
| 1 e4 d6 2 d4 Nf6 3 Nc3 Nbd7 4 f4 e5 | B07 | Pirc Defence-Lion Defence-Anti-Philidor Variation-Lion's Cave/Jansen Variation |
| 1 e4 d6 2 d4 Nf6 3 Nc3 Nbd7 4 f4 e5 5 Nf3 exd4 6 Qxd4 c6 7 Bc4 d5 | B07 | Pirc Defence-Anti-Philidor Variation-Lion's Cave Variation-Lion's Claw Gambit |
| 1 e4 d6 2 d4 Nf6 3 Nc3 Nbd7 4 g4 | B07 | King's Pawn-Pirc Defence-Lion Defence-Bayonet Attack |
| 1 e4 d6 2 d4 Nf6 3 Nf3 | B07 | King's Pawn-Pirc Defence-Roscher Gambit |
| 1 e4 d6 2 f4 | B07 Explore | King's Pawn-Pirc Defence-Harmonist Variation |
| 1 e4 d6 2 f4 d5 3 exd5 Nf6 | B07 | King's Pawn-Pirc Defence-Harmonist Variation-Fuller Gambit |
| 1 e4 d6 2 g4 | B07 Explore | King's Pawn-Pirc Defence-Spike Attack |
| 1 e4 d6 2 h4 | B07 Explore | King's Pawn-Pirc Defence-Petruccioli Attack |
| 1 e4 e5 | C20 Explore | King's Pawn-Open Game |
| 1 e4 e5 2 a3 | C20 Explore | King's Pawn-Mengarini's Variation |
| 1 e4 e5 2 b3 | C20 Explore | King's Pawn-Bednikova/Czyzewski Opening |
| 1 e4 e5 2 Bb5 | C20 Explore | King's Pawn-Portuguese Opening |
| 1 e4 e5 2 Bb5 Bc5 3 b4 | C20 | King's Pawn-Portuguese Opening-Miguel Gambit |
| 1 e4 e5 2 Bb5 Nf6 3 d4 | C20 | King's Pawn-Portuguese Opening-Portuguese Gambit |
| 1 e4 e5 2 Bc4 | C23 Explore | King's Pawn-King's Bishop Opening |
| 1 e4 e5 2 Bc4 b5 3 Bxb5 c6 | C23 | King's Pawn-King's Bishop Opening-Anderssen Gambit |
| 1 e4 e5 2 Bc4 b5 3 Bxb5 f5 | C23 | King's Pawn-King's Bishop Opening-Thorold Gambit |
| 1 e4 e5 2 Bc4 Bc5 | C23 Explore | King's Pawn-King's Bishop Opening-Classical/Boi Defence |
| 1 e4 e5 2 Bc4 Bc5 3 b4 | C23 | King's Pawn-King's Bishop Opening-Classical Defence-Wing/MacDonnell Gambit |
| 1 e4 e5 2 Bc4 Bc5 3 b4 Bxb4 4 c3 | C23 | King's Bishop Opening-Classical Defence-Wing Gambit-LaBourdonnais-Denker Gambit |
| 1 e4 e5 2 Bc4 Bc5 3 b4 Bxb4 4 f4 | C23 | King's Bishop Opening-Classical Defence-Wing Gambit-MacDonnell/McDonnell Double Gambit |
| 1 e4 e5 2 Bc4 Bc5 3 b4 Bxb4 4 f4 exf4 5 Nf3 Be7 6 d4 Bh4+ 7 g3 fxg3 8 0-0 gxh2+ 9 Kh1 | C23 | King's Bishop Opening-Wing Gambit-MacDonnell Double Gambit-4 Pawns' Gambit |
| 1 e4 e5 2 Bc4 Bc5 3 c3 | C23 | King's Pawn-King's Bishop Opening-Classical Defence-Philidor Variation |
| 1 e4 e5 2 Bc4 Bc5 3 c3 d5 | C23 | King's Bishop Opening-Classical Defence-Philidor Variation-Lewis Countergambit |
| 1 e4 e5 2 Bc4 Bc5 3 c3 d5 4 Bxd5 Nf6 5 d4 | C23 | King's Bishop Opening-Philidor Variation-Lewis Countergambit-Walker Variation |
| 1 e4 e5 2 Bc4 Bc5 3 c3 Nf6 4 d4 exd4 5 e5 d5 6 exf6 dxc4 7 Qh5 0-0 | C23 | King's Bishop Opening-Classical Defence-Philidor Variation-Pratt Variation |
| 1 e4 e5 2 Bc4 Bc5 3 c3 Qg5 | C23 | King's Bishop Opening-Classical Defence-Philidor Variation-del Rio Variation |
| 1 e4 e5 2 Bc4 Bc5 3 d4 | C23 | King's Pawn-King's Bishop Opening-Classical Defence-Lewis Gambit |
| 1 e4 e5 2 Bc4 Bc5 3 f4 | C23 | King's Pawn-King's Bishop Opening-Classical Defence-Stein Gambit |
| 1 e4 e5 2 Bc4 Bc5 3 Nf3 d6 4 c3 Qe7 5 d4 | C23 | King's Pawn-King's Bishop Opening-Classical Defence-Petrov Variation |
| 1 e4 e5 2 Bc4 Bc5 3 Qe2 | C23 | King's Pawn-King's Bishop Opening-Classical Defence-Lopez Variation |
| 1 e4 e5 2 Bc4 Bc5 3 Qe2 Nc6 4 c3 Nf6 5 f4 | C23 | King's Bishop Opening-Classical Defence-Lopez Variation-López Gambit |
| 1 e4 e5 2 Bc4 Bc5 3 Qe2 Nf6 4 f4 | C23 | King's Bishop Opening-Classical Defence-Lopez Variation-Lopez Gambit |
| 1 e4 e5 2 Bc4 c6 | C23 Explore | King's Pawn-King's Bishop Opening-Philidor Counterattack |
| 1 e4 e5 2 Bc4 c6 3 d4 d5 4 exd5 cxd5 5 Bb5+ Bd7 6 Bxd7+ Nxd7 7 dxe5 Nxe5 8 Ne2 | C23 | King's Pawn-King's Bishop Opening-Philidor Counterattack-Lisitsyn/Lisitsin Variation |
| 1 e4 e5 2 Bc4 d5 | C23 Explore | King's Pawn-King's Bishop Opening-Khan Gambit |
| 1 e4 e5 2 Bc4 f5 | C23 Explore | King's Pawn-King's Bishop Opening-Calabrese/Calabrian Countergambit |
| 1 e4 e5 2 Bc4 f5 3 d3 | C23 | King's Pawn-King's Bishop Opening-Calabrese Countergambit-Jaenisch Variation |
| 1 e4 e5 2 Bc4 Nf6 | C24 Explore | King's Pawn-King's Bishop Opening-Berlin Defence |
| 1 e4 e5 2 Bc4 Nf6 3 d3 Bc5 4 Nc3 | C26 | King's Pawn-King's Bishop Opening-Berlin Defence-Spielmann Attack |
| 1 e4 e5 2 Bc4 Nf6 3 d3 Be7 4 Nf3 0-0 | C24 | King's Pawn-King's Bishop Opening-Berlin Defence-Kitchener Folly |
| 1 e4 e5 2 Bc4 Nf6 3 d3 Nc6 4 Nc3 | C28 | King's Pawn-King's Bishop Opening-Berlin Defence-Vienna Hybrid |
| 1 e4 e5 2 Bc4 Nf6 3 d3 Nc6 4 Nc3 Bb4 5 Ne2 | C28 | King's Bishop Opening-Berlin Defence-Vienna Hybrid-Hromadka Variation |
| 1 e4 e5 2 Bc4 Nf6 3 d4 | C24 | King's Pawn-King's Bishop Opening-Berlin Defence-Ponziani Gambit |
| 1 e4 e5 2 Bc4 Nf6 3 d4 exd4 4 c3 | C24 | King's Pawn-King's Bishop Opening-Berlin Defence-Warsaw Gambit |
| 1 e4 e5 2 Bc4 Nf6 3 d4 exd4 4 Nf3 | C24 | King's Pawn-King's Bishop Opening-Berlin Defence-Urusov Gambit |
| 1 e4 e5 2 Bc4 Nf6 3 d4 exd4 4 Nf3 d5 5 exd5 Bb4+ 6 c3 Qe7+ | C24 | King's Bishop Opening-Berlin Defence-Urusov Gambit-Panov Variation |
| 1 e4 e5 2 Bc4 Nf6 3 d4 exd4 4 Nf3 Nxe4 5 Qxd4 | C24 | King's Bishop Opening-Berlin Defence-Urusov Gambit-Keidansky Gambit |
| 1 e4 e5 2 Bc4 Nf6 3 f3 | C24 | King's Pawn-King's Bishop Opening-Berlin Defence-Walkerling Variation |
| 1 e4 e5 2 Bc4 Nf6 3 f3 Bc5 4 Ne2 Nc6 5 b4 | C24 | King's Bishop Opening-Berlin Defence-Walkerling Variation-Kreijcik Gambit |
| 1 e4 e5 2 Bc4 Nf6 3 f4 | C24 | King's Pawn-King's Bishop Opening-Berlin Defence-Greco Gambit |
| 1 e4 e5 2 Bc4 Nf6 3 Nc3 b5 | C24 | King's Pawn-King's Bishop Opening-Berlin Defence-Horwitz Gambit |
| 1 e4 e5 2 Bc4 Nf6 3 Nc3 Nxe4 | C24 | King's Pawn-King's Bishop Opening-Berlin Defence-Blanel Gambit |
| 1 e4 e5 2 Bc4 Nf6 3 Ne2 Nxe4 4 Nec3 | C24 | King's Pawn-King's Bishop Opening-Berlin Defence-Paschmann Gambit |
| 1 e4 e5 2 Bc4 Nf6 3 Nf3 Nxe4 4 Nc3 | C42 | King's Pawn-King's Bishop Opening-Berlin Defence-Boden-Kieseritzky Gambit |
| 1 e4 e5 2 Bd3 | C20 Explore | King's Pawn-Tortise/Tortoise Opening |
| 1 e4 e5 2 Be2 | C20 Explore | King's Pawn-Blackburne Opening |
| 1 e4 e5 2 c3 | C20 Explore | King's Pawn-Lopez/Macleod Attack |
| 1 e4 e5 2 c3 d5 3 Qh5 Bd6 | C20 | King's Pawn-Lopez Attack-Norwalder Gambit |
| 1 e4 e5 2 c3 f5 | C20 | King's Pawn-Lopez Attack-Lasa Gambit |
| 1 e4 e5 2 c4 | C20 Explore | King's Pawn-The Whale |
| 1 e4 e5 2 c4 d5 | C20 | King's Pawn-The Whale-Bavarian Gambit |
| 1 e4 e5 2 d3 | C20 Explore | King's Pawn-Leonardis/Indian/Clam Opening |
| 1 e4 e5 2 d3 d5 3 exd5 c6 4 dxc6 Nxc6 | C20 | King's Pawn-Leonardis Opening-Weber Gambit |
| 1 e4 e5 2 d3 f5 | C20 | King's Pawn-Leonardis Opening-King's Gambit Reversed/Indian Gambit |
| 1 e4 e5 2 d3 Nf6 3 f4 Bc5 | C20 | King's Pawn-Leonardis Opening-Radisch Gambit |
| 1 e4 e5 2 d4 | C20 Explore | King's Pawn-Centre Gambit |
| 1 e4 e5 2 d4 d5 | C21 | King's Pawn-Centre Gambit-Beyer/Breyer Gambit |
| 1 e4 e5 2 d4 d6 | C21 | King's Pawn-Centre Gambit-Maróczy Variation |
| 1 e4 e5 2 d4 d6 3 dxe5 Bd7 | C20 | King's Pawn-Centre Gambit-Maróczy Variation-Philidor Gambit |
| 1 e4 e5 2 d4 exd4 | C21 | King's Pawn-Centre Gambit Accepted |
| 1 e4 e5 2 d4 exd4 3 Bc4 | C21 | King's Pawn-Centre Gambit Accepted-Von der Lasa Gambit |
| 1 e4 e5 2 d4 exd4 3 Bd3 | C21 | King's Pawn-Centre Gambit Accepted-Ross Gambit |
| 1 e4 e5 2 d4 exd4 3 c3 | C21 | King's Pawn-Centre Gambit Accepted-Danish Gambit |
| 1 e4 e5 2 d4 exd4 3 c3 d5 | C21 | King's Pawn-Centre Gambit Accepted-Danish Gambit Declined-Soerensen Defence |
| 1 e4 e5 2 d4 exd4 3 c3 d5 4 exd5 Nf6 5 cxd4 Bb4+ | C21 | Centre Gambit Accepted-Danish Gambit Declined-Soerensen Defence-Schlechter Attack |
| 1 e4 e5 2 d4 exd4 3 c3 dxc3 4 Bc4 cxb2 5 Bxb2 Bb4+ | C21 | King's Pawn-Centre Gambit Accepted-Danish Gambit Accepted-Copenhagen Defence |
| 1 e4 e5 2 d4 exd4 3 c3 dxc3 4 Bc4 cxb2 5 Bxb2 d5 | C21 | King's Pawn-Centre Gambit Accepted-Danish Gambit Accepted-Schlechter Defence |
| 1 e4 e5 2 d4 exd4 3 c3 dxc3 4 Bc4 cxb2 5 Bxb2 Nf6 | C21 | King's Pawn-Centre Gambit Accepted-Danish Gambit Accepted-Classical Defence |
| 1 e4 e5 2 d4 exd4 3 c3 dxc3 4 Bc4 cxb2 5 Bxb2 Qe7 | C21 | King's Pawn-Centre Gambit Accepted-Danish Gambit Accepted-Collijn/Chigorin Defence |
| 1 e4 e5 2 d4 exd4 3 c3 dxc3 4 Nxc3 Bb4 5 Bc4 | C21 | King's Pawn-Centre Gambit Accepted-Danish Gambit-Alekhine Variation |
| 1 e4 e5 2 d4 exd4 3 c3 Ne7 | C21 | King's Pawn-Centre Gambit Accepted-Danish Gambit-Svenonius Defence |
| 1 e4 e5 2 d4 exd4 3 c3 Qe7 4 cxd4 Qxe4+ 5 Be2 Qxg2 6 Bf3 Qg6 | C21 | King's Pawn-Centre Gambit Accepted-Danish Gambit-Rosentreter Variation |
| 1 e4 e5 2 d4 exd4 3 e5 | C21 | King's Pawn-Centre Gambit Accepted-Wizard Gambit |
| 1 e4 e5 2 d4 exd4 3 f4 | C21 | King's Pawn-Centre Gambit Accepted-Halasz-McDonnell Gambit |
| 1 e4 e5 2 d4 exd4 3 f4 Bc5 4 Nf3 Nc6 5 c3 | C21 | King's Pawn-Centre Gambit Accepted-Halasz-McDonnell Gambit-Crocodile Variation |
| 1 e4 e5 2 d4 exd4 3 Nf3 Bc5 4 c3 | C21 | King's Pawn-Centre Gambit Accepted-Lanc-Arnold Gambit |
| 1 e4 e5 2 d4 exd4 3 Nf3 Bc5 4 c3 dxc3 5 Bc4 | C21 | King's Pawn-Centre Gambit Accepted-Lanc-Arnold Gambit-Schippler Gambit |
| 1 e4 e5 2 d4 exd4 3 Nf3 c5 4 Bc4 b5 | C21 | King's Pawn-Centre Gambit Accepted-Kieseritsky Variation |
| 1 e4 e5 2 d4 exd4 3 Qxd4 | C21/C22 | King's Pawn-Centre Gambit Accepted |
| 1 e4 e5 2 d4 exd4 3 Qxd4 Nc6 | C22 | King's Pawn-Centre Gambit Accepted-Normal Variation |
| 1 e4 e5 2 d4 exd4 3 Qxd4 Nc6 4 Qc4 | C22 | King's Pawn-Centre Gambit Accepted-Normal Variation-Hall Variation |
| 1 e4 e5 2 d4 exd4 3 Qxd4 Nc6 4 Qe3 | C22 | King's Pawn-Centre Gambit Accepted-Normal Variation-Paulsen Attack |
| 1 e4 e5 2 d4 exd4 3 Qxd4 Nc6 4 Qe3 Bb4+ 5 c3 Be7 | C22 | Centre Gambit Accepted-Normal Variation-Paulsen Attack-Charousek Variation |
| 1 e4 e5 2 d4 exd4 3 Qxd4 Nc6 4 Qe3 f5 | C22 | Centre Gambit Accepted-Normal Variation-Paulsen Attack-L'Hermet Variation |
| 1 e4 e5 2 d4 exd4 3 Qxd4 Nc6 4 Qe3 Nf6 | C22 | Centre Gambit Accepted-Normal Variation-Paulsen Attack-Berger Variation |
| 1 e4 e5 2 d4 exd4 3 Qxd4 Nc6 4 Qe3 Nf6 5 Nc3 Bb4 6 Bd2 0-0 7 0-0-0 Re8 8 Bc4 d6 9 Nh3 | C22 | Centre Gambit Accepted-Paulsen Attack-Berger Variation-Kupreichik Variation |
| 1 e4 e5 2 f3 (Nf6 3 Nc3) | C20 Explore | King's Pawn-King's Head Variation |
| 1 e4 e5 2 f3 Nf6 | C20 | King's Pawn-King's Head Variation-Walkerling Variation |
| 1 e4 e5 2 f4 | C30 Explore | King's Pawn-King's Gambit |
| 1 e4 e5 2 f4 Bc5 | C30 | King's Pawn-King's Gambit Declined-Classical Variation |
| 1 e4 e5 2 f4 Bc5 3 Nf3 d6 4 b4 | C30 | King's Pawn-King's Gambit Declined-Classical Variation-Heath/Rotlewi Countergambit |
| 1 e4 e5 2 f4 Bc5 3 Nf3 d6 4 c3 Bg4 5 fxe5 dxe5 6 Qa4+ | C30 | King's Pawn-King's Gambit Declined-Classical Variation-Marshall/Euwe Attack |
| 1 e4 e5 2 f4 Bc5 3 Nf3 d6 4 c3 f5 | C30 | King's Pawn-King's Gambit Declined-Classical Variation-Classical/Rubinstein Countergambit |
| 1 e4 e5 2 f4 Bc5 3 Nf3 d6 4 c3 f5 5 fxe5 dxe5 6 d4 exd4 7 Bc4 | C30 | King's Gambit Declined-Classical Variation-Classical Countergambit-Réti Variation |
| 1 e4 e5 2 f4 Bc5 3 Nf3 d6 4 c3 f5 5 fxe5 dxe5 6 d4 fxe4 7 Bc4 | C30 | King's Gambit Declined-Classical Variation-Classical Countergambit-Réti Variation |
| 1 e4 e5 2 f4 Bc5 3 Nf3 d6 4 fxe5 | C30 | King's Pawn-King's Gambit Declined-Classical Variation-Soldatenkov Variation |
| 1 e4 e5 2 f4 Bc5 3 Nf3 d6 4 Nc3 Nd7 | C30 | King's Pawn-King's Gambit Declined-Classical Variation-Hanham Variation |
| 1 e4 e5 2 f4 Bc5 3 Nf3 d6 4 Nc3 Nf6 5 Bc4 Nc6 6 d3 Bg4 | C30 | King's Pawn-King's Gambit Declined-Classical Variation-Blackburne Variation |
| 1 e4 e5 2 f4 Bc5 3 Nf3 d6 4 Nc3 Nf6 5 Bc4 Nc6 6 d3 Bg4 7 h3 Bxf3 8 Qxf3 exf4 | C30 | King's Gambit Declined-Classical Variation-Blackburne Variation-Svenonius Variation |
| 1 e4 e5 2 f4 Bc5 3 Nf3 g5 | C30 | King's Pawn-King's Gambit Declined-Classical Variation-Senechaud Countergambit |
| 1 e4 e5 2 f4 c5 | C30 | King's Pawn-King's Gambit Declined-Mafia Defence |
| 1 e4 e5 2 f4 d5 | C31 | King's Pawn-King's Gambit Declined-Falkbeer Countergambit |
| 1 e4 e5 2 f4 d5 3 d4 | C31 | King's Pawn-King's Gambit Declined-Falkbeer Countergambit-Hinrichsen Gambit |
| 1 e4 e5 2 f4 d5 3 exd5 | C31 | King's Pawn-King's Gambit Declined-Falkbeer Countergambit Accepted |
| 1 e4 e5 2 f4 d5 3 exd5 Bc5 | C31 | King's Pawn-King's Gambit Declined-Falkbeer Countergambit Accepted-Miles Gambit |
| 1 e4 e5 2 f4 d5 3 exd5 c6 | C31 | King's Pawn-King's Gambit Declined-Falkbeer Countergambit Accepted-Nimzowitsch-Marshall Countergambit |
| 1 e4 e5 2 f4 d5 3 exd5 c6 4 dxc6 Bc5 | C31 | King's Gambit Declined-Falkbeer Countergambit Accepted-Nimzowitsch-Marshall Countergambit-Pickler Gambit |
| 1 e4 e5 2 f4 d5 3 exd5 e4 | C31 | King's Pawn-King's Gambit Declined-Falkbeer Countergambit Accepted-Staunton Line |
| 1 e4 e5 2 f4 d5 3 exd5 e4 4 Bb5+ | C31 | King's Pawn-King's Gambit Declined-Falkbeer Countergambit Accepted-Nimzowitsch/Anderssen Attack |
| 1 e4 e5 2 f4 d5 3 exd5 e4 4 d3 | C31 | King's Pawn-King's Gambit Declined-Falkbeer Countergambit Accepted-Charousek Gambit |
| 1 e4 e5 2 f4 d5 3 exd5 e4 4 d3 Nf6 5 dxe4 | C32 | King's Pawn-King's Gambit Declined-Falkbeer Countergambit Accepted-Charousek Gambit Accepted |
| 1 e4 e5 2 f4 d5 3 exd5 e4 4 d3 Nf6 5 dxe4 Nxe4 6 Nf3 Bc5 7 Qe2 Bf2+ 8 Kd1 Qxd5+ 9 Nfd2 | C32 | King's Gambit Declined-Falkbeer Countergambit Accepted-Charousek Gambit Accepted-Alapin Variation |
| 1 e4 e5 2 f4 d5 3 exd5 e4 4 d3 Nf6 5 dxe4 Nxe4 6 Nf3 Bc5 7 Qe2 Bf5 | C32 | King's Gambit Declined-Falkbeer Countergambit Accepted-Charousek Gambit Accepted-Main Line |
| 1 e4 e5 2 f4 d5 3 exd5 e4 4 d3 Nf6 5 dxe4 Nxe4 6 Nf3 Bc5 7 Qe2 Bf5 8 g4 0-0 | C32 | King's Gambit Declined-Charousek Gambit Accepted-Main Line-Tarrasch Variation |
| 1 e4 e5 2 f4 d5 3 exd5 e4 4 d3 Nf6 5 dxe4 Nxe4 6 Qe2 Qxd5 7 Nd2 f5 8 g4 | C32 | King's Gambit Declined-Falkbeer Countergambit Accepted-Charousek Gambit Accepted-Charousek Variation |
| 1 e4 e5 2 f4 d5 3 exd5 e4 4 d3 Nf6 5 Nc3 Bb4 6 Bd2 e3 | C31 | King's Gambit Declined-Falkbeer Countergambit Accepted-Charousek Gambit-Morphy Gambit |
| 1 e4 e5 2 f4 d5 3 exd5 e4 4 d3 Nf6 5 Nd2 | C32 | King's Gambit Declined-Falkbeer Countergambit Accepted-Charousek Gambit-Keres Variation |
| 1 e4 e5 2 f4 d5 3 exd5 e4 4 d3 Nf6 5 Qe2 | C32 | King's Gambit Declined-Falkbeer Countergambit Accepted-Charousek Gambit-Réti/Old Line |
| 1 e4 e5 2 f4 d5 3 exd5 e4 4 Nc3 Nf6 5 Qe2 | C31 | King's Pawn-King's Gambit Declined-Falkbeer Countergambit Accepted-Rubinstein Variation |
| 1 e4 e5 2 f4 d5 3 exd5 exf4 | C32 | King's Pawn-King's Gambit Declined-Falkbeer Countergambit Accepted-Modern Transfer |
| 1 e4 e5 2 f4 d5 3 Nc3 | C31 | King's Pawn-King's Gambit Declined-Falkbeer Countergambit-Milner-Barry Variation |
| 1 e4 e5 2 f4 d5 3 Nf3 | C31 | King's Pawn-King's Gambit Declined-Falkbeer Countergambit-Tartakower/Blackburne Attack |
| 1 e4 e5 2 f4 d6 | C30 | King's Pawn-King's Gambit Declined-Nimzovich Variation |
| 1 e4 e5 2 f4 exf4 | C33 | King's Pawn-King's Gambit Accepted |
| 1 e4 e5 2 f4 exf4 3 b3 | C33 | King's Pawn-King's Gambit Accepted-Orsini Gambit |
| 1 e4 e5 2 f4 exf4 3 Bb5 | C33 | King's Pawn-King's Gambit Accepted-Schurig Gambit |
| 1 e4 e5 2 f4 exf4 3 Bc4 | C33 | King's Pawn-King's Bishop's Gambit |
| 1 e4 e5 2 f4 exf4 3 Bc4 b5 | C33 | King's Pawn-King's Bishop's Gambit-Brien's/Kieseritzky's Countergambit 2/Lesser Bryan |
| 1 e4 e5 2 f4 exf4 3 Bc4 c6 | C33 | King's Pawn-King's Bishop's Gambit-Ruy López Defence |
| 1 e4 e5 2 f4 exf4 3 Bc4 d5 | C33 | King's Pawn-King's Bishop's Gambit-Bledow Variation |
| 1 e4 e5 2 f4 exf4 3 Bc4 d5 4 Bxd5 c6 | C33 | King's Pawn-King's Bishop's Gambit-Bledow Variation-Anderssen Variation |
| 1 e4 e5 2 f4 exf4 3 Bc4 d5 4 Bxd5 Nf6 | C33 | King's Pawn-King's Bishop's Gambit-Bledow Variation-Morphy/Bledow Countergambit |
| 1 e4 e5 2 f4 exf4 3 Bc4 d5 4 Bxd5 Qh4+ 5 Kf1 Bd6 | C33 | King's Pawn-King's Bishop's Gambit-Bledow Variation-Borén-Svenonius Variation |
| 1 e4 e5 2 f4 exf4 3 Bc4 d5 4 Bxd5 Qh4+ 5 Kf1 g5 6 g3 | C33 | King's Pawn-King's Bishop's Gambit-Bledow Variation-Gifford Variation |
| 1 e4 e5 2 f4 exf4 3 Bc4 f5 | C33 | King's Pawn-King's Bishop's Gambit-Lopez-Gianutio Countergambit |
| 1 e4 e5 2 f4 exf4 3 Bc4 f5 4 Qe2 Qh4+ 5 Kd1 fxe4 6 Nc3 Kd8 | C33 | King's Pawn-King's Bishop's Gambit-Lopez-Gianutio Countergambit-Hein Variation |
| 1 e4 e5 2 f4 exf4 3 Bc4 g5 | C33 | King's Pawn-King's Bishop's Gambit-Anderssen Defence |
| 1 e4 e5 2 f4 exf4 3 Bc4 Nc6 | C33 | King's Pawn-King's Bishop's Gambit-Maurian Defence |
| 1 e4 e5 2 f4 exf4 3 Bc4 Ne7 | C33 | King's Pawn-King's Bishop's Gambit-Steinitz Defence |
| 1 e4 e5 2 f4 exf4 3 Bc4 Nf6 | C33 | King's Pawn-King's Bishop's Gambit-Cozio/Morphy Defence |
| 1 e4 e5 2 f4 exf4 3 Bc4 Nf6 4 Nc3 | C33 | King's Pawn-King's Bishop's Gambit-Cozio Defence-Bogoljubov Variation |
| 1 e4 e5 2 f4 exf4 3 Bc4 Nf6 4 Nc3 Bb4 5 e5 | C33 | King's Bishop's Gambit-Cozio Defence-Bogoljubov Variation-Paulsen Attack |
| 1 e4 e5 2 f4 exf4 3 Bc4 Nf6 4 Nc3 c6 | C33 | King's Bishop's Gambit-Cozio Defence-Bogoljubov Variation-Jaenisch/Bogoljubov Defence |
| 1 e4 e5 2 f4 exf4 3 Bc4 Qh4+ | C33 | King's Pawn-King's Bishop's Gambit-Classical Defence |
| 1 e4 e5 2 f4 exf4 3 Bc4 Qh4+ 4 Kf1 b5 | C33 | King's Pawn-King's Bishop's Gambit-Classical Defence-Bryan Countergambit |
| 1 e4 e5 2 f4 exf4 3 Bc4 Qh4+ 4 Kf1 Bc5 | C33 | King's Pawn-King's Bishop's Gambit-Classical Defence-Greco Variation |
| 1 e4 e5 2 f4 exf4 3 Bc4 Qh4+ 4 Kf1 d5 5 Bxd5 g5 6 g3 | C33 | King's Pawn-King's Bishop's Gambit-Classical Defence-Chigorin's Attack |
| 1 e4 e5 2 f4 exf4 3 Bc4 Qh4+ 4 Kf1 d6 | C33 | King's Pawn-King's Bishop's Gambit-Classical Defence-Cozio Variation |
| 1 e4 e5 2 f4 exf4 3 Bc4 Qh4+ 4 Kf1 d6 5 Qf3 | C33 | King's Bishop's Gambit-Classical Defence-Cozio Variation-Lesser Cozio Variation |
| 1 e4 e5 2 f4 exf4 3 Bc4 Qh4+ 4 Kf1 g5 | C33 | King's Pawn-King's Bishop's Gambit-Classical Defence-Lopez Variation |
| 1 e4 e5 2 f4 exf4 3 Bc4 Qh4+ 4 Kf1 g5 5 Nc3 Bg7 6 d4 d6 7 e5 | C33 | King's Bishop's Gambit-Classical Defence-Lopez Variation-Grimm Attack |
| 1 e4 e5 2 f4 exf4 3 Bc4 Qh4+ 4 Kf1 g5 5 Nc3 Bg7 6 d4 Ne7 | C33 | King's Bishop's Gambit-Classical Defence-Lopez Variation-McDonnell Defence |
| 1 e4 e5 2 f4 exf4 3 Bc4 Qh4+ 4 Kf1 g5 5 Nc3 Bg7 6 d4 Ne7 7 g3 | C33 | King's Bishop's Gambit-Lopez Variation-McDonnell Defence-MacDonnell Attack |
| 1 e4 e5 2 f4 exf4 3 Bc4 Qh4+ 4 Kf1 g5 5 Nc3 Bg7 6 g3 | C33 | King's Bishop's Gambit-Classical Defence-Lopez Variation-McDonnell Attack |
| 1 e4 e5 2 f4 exf4 3 Bc4 Qh4+ 4 Kf1 g5 5 Nc3 Bg7 6 g3 fxg3 7 Qf3 | C33 | King's Bishop's Gambit-Lopez Variation-McDonnell Attack-Fraser Variation |
| 1 e4 e5 2 f4 exf4 3 Bc4 Qh4+ 4 Kf1 g5 5 Qf3 | C33 | King's Bishop's Gambit-Classical Defence-Lopez Variation-Cozio's Attack |
| 1 e4 e5 2 f4 exf4 3 Bc4 Qh4+ 4 Kf1 Nc6 | C33 | King's Pawn-King's Bishop's Gambit-Classical Defence-Boden Defence |
| 1 e4 e5 2 f4 exf4 3 Bc4 Qh4+ 4 Kf1 Nf6 | C33 | King's Pawn-King's Bishop's Gambit-Classical Defence-First Jaenisch Variation |
| 1 e4 e5 2 f4 exf4 3 Bc4 Qh4+ 4 Kf1 Qf6 | C33 | King's Pawn-King's Bishop's Gambit-Classical Defence-Jaenisch Variation |
| 1 e4 e5 2 f4 exf4 3 Bd3 | C33 | King's Pawn-King's Gambit Accepted-Schurig Gambit |
| 1 e4 e5 2 f4 exf4 3 Be2 | C33 | King's Pawn-King's Gambit Accepted-Lesser Bishop's/Petroff-Jaenisch-Tartakower Gambit |
| 1 e4 e5 2 f4 exf4 3 Be2 f5 4 exf5 d6 | C33 | King's Pawn-King's Gambit Accepted-Lesser Bishop's Gambit-Weiss Defence |
| 1 e4 e5 2 f4 exf4 3 d4 | C33 | King's Pawn-King's Gambit Accepted-Villemson/Steinitz/Polerio Gambit |
| 1 e4 e5 2 f4 exf4 3 g3 | C33 | King's Pawn-King's Gambit Accepted-Gaga Gambit |
| 1 e4 e5 2 f4 exf4 3 h4 | C33 | King's Pawn-King's Gambit Accepted-Pawn's/Stamma/Calvi Gambit |
| 1 e4 e5 2 f4 exf4 3 Kf2 | C33 | King's Pawn-King's Gambit Accepted-Tumbleweed Gambit |
| 1 e4 e5 2 f4 exf4 3 Nc3 | C33 | King's Pawn-King's Gambit Accepted-Mason-Keres/Mason-Steinitz Gambit |
| 1 e4 e5 2 f4 exf4 3 Ne2 | C33 | King's Pawn-King's Gambit Accepted-Paris Gambit |
| 1 e4 e5 2 f4 exf4 3 Nf3 | C34 | King's Pawn-King's Knight's Gambit |
| 1 e4 e5 2 f4 exf4 3 Nf3 Be7 | C35 | King's Pawn-King's Knight's Gambit-Cunningham Gambit |
| 1 e4 e5 2 f4 exf4 3 Nf3 Be7 4 Bc4 Bh4+ 5 g3 | C35 | King's Pawn-King's Knight's Gambit-Cunningham Gambit-Bertin Gambit |
| 1 e4 e5 2 f4 exf4 3 Nf3 Be7 4 Bc4 Bh4+ 5 g3 fxg3 6 0-0 gxh2+ 7 Kh1 | C35 | King's Knight's Gambit-Cunningham Gambit-Bertin Gambit-3 Pawns Gambit |
| 1 e4 e5 2 f4 exf4 3 Nf3 Be7 4 Bc4 Nf6 | C35 | King's Pawn-King's Knight's Gambit-Cunningham Gambit-Euwe/McCormick Defence |
| 1 e4 e5 2 f4 exf4 3 Nf3 d5 | C36 | King's Pawn-King's Knight's Gambit-Classical/Modern/Abazzia Defence |
| 1 e4 e5 2 f4 exf4 3 Nf3 d5 4 exd5 Nf6 | C36 | King's Pawn-King's Knight's Gambit-Modern Defence-Abbazia/Modern Defence |
| 1 e4 e5 2 f4 exf4 3 Nf3 d5 4 exd5 Nf6 5 Bb5+ c6 6 dxc6 bxc6 7 Bc4 | C36 | King's Knight's Gambit-Modern Defence-Abbazia Defence-Botvinnik Line |
| 1 e4 e5 2 f4 exf4 3 Nf3 d5 4 exd5 Nf6 5 Bb5+ c6 6 dxc6 bxc6 7 Bc4 Nd5 | C36 | King's Knight's Gambit-Abbazia Defence-Botvinnik Line-Main Line |
| 1 e4 e5 2 f4 exf4 3 Nf3 d6 | C34 | King's Pawn-King's Knight's Gambit-Fischer Defence |
| 1 e4 e5 2 f4 exf4 3 Nf3 d6 4 b4 | C34 | King's Pawn-King's Knight's Gambit-Fischer Defence-Schulder Gambit |
| 1 e4 e5 2 f4 exf4 3 Nf3 d6 4 d4 Nf6 5 Bd3 | C34 | King's Pawn-King's Knight's Gambit-Fischer Defence-Spanish Variation |
| 1 e4 e5 2 f4 exf4 3 Nf3 f5 | C34 | King's Pawn-King's Knight's Gambit-Gianutio Countergambit |
| 1 e4 e5 2 f4 exf4 3 Nf3 f5 4 e5 | C34 | King's Pawn-King's Knight's Gambit-Gianutio Countergambit-Alapin Variation |
| 1 e4 e5 2 f4 exf4 3 Nf3 g5 | C34/C37 | King's Pawn-King's Gambit Accepted-King's Knight's Gambit-Classical Knight Variation |
| 1 e4 e5 2 f4 exf4 3 Nf3 g5 4 Bc4 | C37 | King's Pawn-King's Gambit Accepted-King's Knight's Gambit |
| 1 e4 e5 2 f4 exf4 3 Nf3 g5 4 Bc4 Bg7 | C38 | King's Pawn-King's Knight's Gambit-Traditional Variation |
| 1 e4 e5 2 f4 exf4 3 Nf3 g5 4 Bc4 Bg7 5 0-0 | C38 | King's Knight's Gambit-Traditional Variation-Hanstein Gambit |
| 1 e4 e5 2 f4 exf4 3 Nf3 g5 4 Bc4 Bg7 5 d4 | C38 | King's Pawn-King's Knight's Gambit-Traditional Variation-Hanstein Variation |
| 1 e4 e5 2 f4 exf4 3 Nf3 g5 4 Bc4 Bg7 5 d4 d6 6 c3 | C38 | King's Knight's Gambit-Traditional Variation-Hanstein Variation-Mayet Gambit |
| 1 e4 e5 2 f4 exf4 3 Nf3 g5 4 Bc4 Bg7 5 h4 | C38 | King's Knight's Gambit-Traditional Variation-Philidor Gambit |
| 1 e4 e5 2 f4 exf4 3 Nf3 g5 4 Bc4 Bg7 5 h4 h6 6 d4 d6 | C38 | King's Knight's Gambit-Traditional Variation-Philidor Gambit-Greco Gambit |
| 1 e4 e5 2 f4 exf4 3 Nf3 g5 4 Bc4 Bg7 5 h4 h6 6 d4 d6 7 hxg5 hxg5 8 Rxh8 Bxh8 9 Nc3 c6 10 Ne5 | C38 | King's Knight's Gambit-Philidor Gambit-Greco Gambit-Calabrese Gambit |
| 1 e4 e5 2 f4 exf4 3 Nf3 g5 4 Bc4 Bg7 5 h4 h6 6 d4 d6 7 Nc3 c6 8 hxg5 hxg5 9 Rxh8 Bxh8 10 Ne5 | C38 | King's Knight's Gambit-Philidor Gambit-Greco Gambit-Calabrais Gambit |
| 1 e4 e5 2 f4 exf4 3 Nf3 g5 4 Bc4 Bg7 5 h4 h6 6 d4 d6 7 Qd3 | C38 | King's Knight's Gambit-Philidor Gambit-Greco Gambit-Schultz Variation |
| 1 e4 e5 2 f4 exf4 3 Nf3 g5 4 Bc4 d6 5 0-0 Bg4 6 h3 h5 7 hxg4 hxg4 | C37 | King's Pawn-King's Knight's Gambit-Middleton Countergambit |
| 1 e4 e5 2 f4 exf4 3 Nf3 g5 4 Bc4 g4 5 0-0 | C37 | King's Pawn-King's Knight's Gambit-Muzio/Wild Muzio Gambit |
| 1 e4 e5 2 f4 exf4 3 Nf3 g5 4 Bc4 g4 5 0-0 d5 | C37 | King's Pawn-King's Knight's Gambit-Muzio Gambit-Brentano Defence |
| 1 e4 e5 2 f4 exf4 3 Nf3 g5 4 Bc4 g4 5 0-0 gxf3 6 Qxf3 Nc6 | C37 | King's Pawn-King's Knight's Gambit-Muzio Gambit-Holloway Defence |
| 1 e4 e5 2 f4 exf4 3 Nf3 g5 4 Bc4 g4 5 0-0 gxf3 6 Qxf3 Qe7 | C37 | King's Pawn-King's Knight's Gambit-Muzio Gambit Accepted-From Defence |
| 1 e4 e5 2 f4 exf4 3 Nf3 g5 4 Bc4 g4 5 0-0 gxf3 6 Qxf3 Qf6 | C37 | King's Pawn-King's Knight's Gambit-Muzio Gambit-Sarratt Defence |
| 1 e4 e5 2 f4 exf4 3 Nf3 g5 4 Bc4 g4 5 0-0 gxf3 6 Qxf3 Qf6 7 Bxf7+ Kxf7 8 d4 Qxd4+ 9 Be3 Qf6 10 Nc3 fxe3 | C37 | King's Knight's Gambit-Muzio Gambit-Sarratt Defence-Young Gambit |
| 1 e4 e5 2 f4 exf4 3 Nf3 g5 4 Bc4 g4 5 0-0 gxf3 6 Qxf3 Qf6 7 e5 Qf5 | C37 | King's Knight's Gambit-Muzio Gambit-Sarratt Defence-Fraser's Counterattack |
| 1 e4 e5 2 f4 exf4 3 Nf3 g5 4 Bc4 g4 5 0-0 gxf3 6 Qxf3 Qf6 7 e5 Qxe5 8 Bxf7+ | C37 | King's Knight's Gambit-Muzio Gambit-Sarratt Defence-Double Muzio Gambit |
| 1 e4 e5 2 f4 exf4 3 Nf3 g5 4 Bc4 g4 5 0-0 gxf3 6 Qxf3 Qf6 7 e5 Qxe5 8 d3 Bh6 9 Nc3 Ne7 10 Bd2 Nbc6 11 Rae1 | C37 | King's Knight's Gambit-Muzio Gambit-Sarratt Defence-Paulsen Defence |
| 1 e4 e5 2 f4 exf4 3 Nf3 g5 4 Bc4 g4 5 0-0 gxf3 6 Qxf3 Qf6 7 Nc3 | C37 | King's Knight's Gambit-Muzio Gambit-Sarratt Defence-Bello Gambit |
| 1 e4 e5 2 f4 exf4 3 Nf3 g5 4 Bc4 g4 5 0-0 gxf3 6 Qxf3 Qf6 7 Nc3 Qd4+ 8 Kh1 Qxc4 9 Nd5 | C37 | King's Knight's Gambit-Sarratt Defence-Bello Gambit-Baldwin Gambit |
| 1 e4 e5 2 f4 exf4 3 Nf3 g5 4 Bc4 g4 5 0-0 Qe7 | C37 | King's Pawn-King's Knight's Gambit-Muzio Gambit-Kling and Horwitz Counterattack |
| 1 e4 e5 2 f4 exf4 3 Nf3 g5 4 Bc4 g4 5 Bxf7+ | C37 | King's Pawn-King's Knight's Gambit-Lolli/Wild Muzio Gambit |
| 1 e4 e5 2 f4 exf4 3 Nf3 g5 4 Bc4 g4 5 Bxf7+ Kxf7 6 0-0 gxf3 7 Qxf3 Qf6 8 d4 Qxd4+ 9 Be3 Qf6 10 Nc3 | C37 | King's Pawn-King's Knight's Gambit-Lolli Gambit-Young Variation |
| 1 e4 e5 2 f4 exf4 3 Nf3 g5 4 Bc4 g4 5 d4 (gxf3 6 Qxf3) | C37 | King's Pawn-King's Knight's Gambit-Ghulam Kassim Gambit |
| 1 e4 e5 2 f4 exf4 3 Nf3 g5 4 Bc4 g4 5 d4 gxf3 6 Bxf4 | C37 | King's Pawn-King's Knight's Gambit-Ghulam Kassim Gambit-Kotov Gambit |
| 1 e4 e5 2 f4 exf4 3 Nf3 g5 4 Bc4 g4 5 h4 | C37 | King's Pawn-King's Knight's Gambit-Australian Gambit |
| 1 e4 e5 2 f4 exf4 3 Nf3 g5 4 Bc4 g4 5 Nc3 | C37 | King's Pawn-King's Knight's Gambit-MacDonnell/McDonnell Gambit |
| 1 e4 e5 2 f4 exf4 3 Nf3 g5 4 Bc4 g4 5 Ne5 | C37 | King's Knight's Gambit-Salvio Gambit |
| 1 e4 e5 2 f4 exf4 3 Nf3 g5 4 Bc4 g4 5 Ne5 Qh4+ 6 Kf1 f3 | C37 | King's Knight's Gambit-Salvio Gambit-Cochrane Gambit |
| 1 e4 e5 2 f4 exf4 3 Nf3 g5 4 Bc4 g4 5 Ne5 Qh4+ 6 Kf1 Nc6 | C37 | King's Knight's Gambit-Salvio Gambit-Herzfeld/Viennese Gambit |
| 1 e4 e5 2 f4 exf4 3 Nf3 g5 4 Bc4 g4 5 Ne5 Qh4+ 6 Kf1 Nf6 | C37 | King's Gambit Accepted-King's Knight's Gambit-Salvio Gambit-Santa Maria Defence |
| 1 e4 e5 2 f4 exf4 3 Nf3 g5 4 Bc4 g4 5 Ne5 Qh4+ 6 Kf1 Nh6 | C37 | King's Knight's Gambit-Salvio Gambit-Silbershmidt Defence |
| 1 e4 e5 2 f4 exf4 3 Nf3 g5 4 Bc4 g4 5 Ne5 Qh4+ 6 Kf1 Nh6 7 d4 d6 | C37 | King's Knight's Gambit-Salvio Gambit-Silbershmidt Defence-Anderssen's Counterattack |
| 1 e4 e5 2 f4 exf4 3 Nf3 g5 4 Bc4 g4 5 Ne5 Qh4+ 6 Kf1 Nh6 7 d4 f3 | C37 | King's Knight's Gambit-Salvio Gambit-Silbershmidt Defence-Silberschmidt Gambit |
| 1 e4 e5 2 f4 exf4 3 Nf3 g5 4 Bc4 Nc6 | C37 | King's Pawn-King's Knight's Gambit-Blachly Gambit |
| 1 e4 e5 2 f4 exf4 3 Nf3 g5 4 d4 | C37 | King's Pawn-King's Knight's Gambit-Rosentreter Gambit |
| 1 e4 e5 2 f4 exf4 3 Nf3 g5 4 d4 g4 5 Bxf4 | C37 | King's Pawn-King's Knight's Gambit-Rosentreter Gambit-Rosentreter-Testa Gambit |
| 1 e4 e5 2 f4 exf4 3 Nf3 g5 4 d4 g4 5 Nc3 | C37 | King's Pawn-King's Knight's Gambit-Rosentreter Gambit-Soerensen Gambit |
| 1 e4 e5 2 f4 exf4 3 Nf3 g5 4 d4 g4 5 Ne5 | C37 | King's Pawn-King's Knight's Gambit-Rosentreter Gambit-Soerensen Gambit |
| 1 e4 e5 2 f4 exf4 3 Nf3 g5 4 d4 g4 5 Ne5 Qh4+ 6 g3 | C37 | King's Knight's Gambit-Rosentreter Gambit-Soerensen Gambit-Bird Gambit |
| 1 e4 e5 2 f4 exf4 3 Nf3 g5 4 d4 h6 5 h4 Bg7 | C37 | King's Pawn-King's Knight's Gambit-Rosentreter Gambit-Becker Variation |
| 1 e4 e5 2 f4 exf4 3 Nf3 g5 4 h4 | C39 | King's Pawn-King's Knight's Gambit-Paris Attack |
| 1 e4 e5 2 f4 exf4 3 Nf3 g5 4 h4 g4 5 Ne5 | C39 | King's Pawn-King's Knight's Gambit-Paris Attack-Kieseritzky Gambit |
| 1 e4 e5 2 f4 exf4 3 Nf3 g5 4 h4 g4 5 Ne5 Be7 | C39 | King's Knight's Gambit-Paris Attack-Kieseritzky Gambit-Polerio Defence |
| 1 e4 e5 2 f4 exf4 3 Nf3 g5 4 h4 g4 5 Ne5 Bg7 | C39 | King's Knight's Gambit-Paris Attack-Kieseritzky Gambit-Paulsen Defence |
| 1 e4 e5 2 f4 exf4 3 Nf3 g5 4 h4 g4 5 Ne5 d5 | C39 | King's Knight's Gambit-Paris Attack-Kieseritzky Gambit-Campbell/Ernest Morphy's/Campell Defence |
| 1 e4 e5 2 f4 exf4 3 Nf3 g5 4 h4 g4 5 Ne5 d5 6 d4 Nf6 7 Bxf4 | C39 | King's Knight's Gambit-Kieseritzky Gambit-Campbell Defence-Brentano Defence |
| 1 e4 e5 2 f4 exf4 3 Nf3 g5 4 h4 g4 5 Ne5 d5 6 d4 Nf6 7 Bxf4 Nxe4 8 Nd2 | C39 | King's Knight's Gambit-Campbell Defence-Brentano Defence-Caro Variation |
| 1 e4 e5 2 f4 exf4 3 Nf3 g5 4 h4 g4 5 Ne5 d5 6 d4 Nf6 7 exd5 Qxd5 8 Nc3 Bb4 9 Kf2 | C39 | King's Knight's Gambit-Kieseritzky Gambit-Campbell Defence-Kaplanek Variation |
| 1 e4 e5 2 f4 exf4 3 Nf3 g5 4 h4 g4 5 Ne5 d6 | C39 | King's Knight's Gambit-Paris Attack-Kieseritzky Gambit-Kolisch Defence |
| 1 e4 e5 2 f4 exf4 3 Nf3 g5 4 h4 g4 5 Ne5 h5 | C39 | King's Knight's Gambit-Paris Attack-Kieseritzky Gambit-Stockwhip/Long Whip/Classical Defence |
| 1 e4 e5 2 f4 exf4 3 Nf3 g5 4 h4 g4 5 Ne5 h5 6 Bc4 Rh7 7 d4 Bh6 8 Nc3 | C39 | King's Knight's Gambit-Kieseritzky Gambit-Stockwhip Defence-Jaenisch Variation |
| 1 e4 e5 2 f4 exf4 3 Nf3 g5 4 h4 g4 5 Ne5 h6 6 Nxf7 | C39 | King's Knight's Gambit-Paris Attack-Kieseritzky Gambit-Cotter Gambit |
| 1 e4 e5 2 f4 exf4 3 Nf3 g5 4 h4 g4 5 Ne5 Nc6 | C39 | King's Knight's Gambit-Paris Attack-Kieseritzky Gambit-Neumann Defence |
| 1 e4 e5 2 f4 exf4 3 Nf3 g5 4 h4 g4 5 Ne5 Nf6 | C39 | King's Knight's Gambit-Paris Attack-Kieseritzky Gambit-Berlin Defence |
| 1 e4 e5 2 f4 exf4 3 Nf3 g5 4 h4 g4 5 Ne5 Nf6 6 Bc4 d5 7 exd5 Bd6 | C39 | King's Knight's Gambit-Kieseritzky Gambit-Berlin Defence-Anderssen Defence |
| 1 e4 e5 2 f4 exf4 3 Nf3 g5 4 h4 g4 5 Ne5 Nf6 6 Bc4 d5 7 exd5 Bd6 8 0-0 (Bxe5) | C39 | King's Knight's Gambit-Berlin Defence-Anderssen Defence-Rice Gambit |
| 1 e4 e5 2 f4 exf4 3 Nf3 g5 4 h4 g4 5 Ne5 Nf6 6 Bc4 d5 7 exd5 Bd6 8 d4 Nh5 9 Bxf4 Nxf4 | C39 | King's Knight's Gambit-Berlin Defence-Anderssen Defence-Anderssen-Cordel Gambit |
| 1 e4 e5 2 f4 exf4 3 Nf3 g5 4 h4 g4 5 Ne5 Nf6 6 Bc4 d5 7 exd5 Bg7 | C39 | King's Knight's Gambit-Kieseritzky Gambit-Berlin Defence-Paulsen Defence Deferred |
| 1 e4 e5 2 f4 exf4 3 Nf3 g5 4 h4 g4 5 Ne5 Nf6 6 d4 | C39 | King's Knight's Gambit-Kieseritzky Gambit-Berlin Defence-Rubinstein Variation |
| 1 e4 e5 2 f4 exf4 3 Nf3 g5 4 h4 g4 5 Ne5 Nf6 6 Nxg4 d5 | C39 | King's Knight's Gambit-Kieseritzky Gambit-Berlin Defence-Rivière Variation |
| 1 e4 e5 2 f4 exf4 3 Nf3 g5 4 h4 g4 5 Ne5 Qe7 | C39 | King's Knight's Gambit-Paris Attack-Kieseritzky Gambit-Salvio (Rosenthal) Defence |
| 1 e4 e5 2 f4 exf4 3 Nf3 g5 4 h4 g4 5 Ne5 Qe7 6 d4 f5 7 Bc4 | C39 | King's Knight's Gambit-Kieseritzky Gambit-Salvio Defence-Cozio Variation |
| 1 e4 e5 2 f4 exf4 3 Nf3 g5 4 h4 g4 5 Ng5 | C39 | King's Pawn-King's Knight's Gambit-Paris Attack-Allgaier Gambit |
| 1 e4 e5 2 f4 exf4 3 Nf3 g5 4 h4 g4 5 Ng5 h6 6 Nxf7 Kxf7 7 Bc4+ | C39 | King's Knight's Gambit-Paris Attack-Allgaier Gambit-Walker Attack |
| 1 e4 e5 2 f4 exf4 3 Nf3 g5 4 h4 g4 5 Ng5 h6 6 Nxf7 Kxf7 7 Bc4+ d5 8 Bxd5+ Kg7 9 d4 | C39 | King's Knight's Gambit-Allgaier Gambit-Walker Attack-Urusov Attack |
| 1 e4 e5 2 f4 exf4 3 Nf3 g5 4 h4 g4 5 Ng5 h6 6 Nxf7 Kxf7 7 d4 | C39 | King's Pawn-King's Knight's Gambit-Paris Attack-Allgaier-Thorold Gambit |
| 1 e4 e5 2 f4 exf4 3 Nf3 g5 4 h4 g4 5 Ng5 h6 6 Nxf7 Kxf7 7 d4 d5 8 Bxf4 dxe4 9 Bc4+ Kg7 10 Be5+ | C39 | King's Knight's Gambit-Paris Attack-Allgaier-Thorold Gambit-Cook Variation |
| 1 e4 e5 2 f4 exf4 3 Nf3 g5 4 h4 g4 5 Ng5 h6 6 Nxf7 Kxf7 7 Nc3 | C39 | King's Pawn-King's Knight's Gambit-Paris Attack-Allgaier Gambit-Blackburne Gambit |
| 1 e4 e5 2 f4 exf4 3 Nf3 g5 4 h4 g4 5 Ng5 h6 6 Nxf7 Kxf7 7 Qxg4 Nf6 8 Qxf4 Bd6 | C39 | King's Knight's Gambit-Paris Attack-Allgaier Gambit-Horny Defence |
| 1 e4 e5 2 f4 exf4 3 Nf3 g5 4 h4 g4 5 Ng5 Nf6 | C39 | King's Pawn-King's Knight's Gambit-Paris Attack-Allgaier Gambit-Schlechter Defence |
| 1 e4 e5 2 f4 exf4 3 Nf3 g5 4 Nc3 | C37 | King's Pawn-King's Knight's Gambit-Quaade/Quade Gambit |
| 1 e4 e5 2 f4 exf4 3 Nf3 g5 4 Ne5 | C37 | King's Pawn-King's Gambit Accepted-King's Knight's Gambit-Sorensen Variation |
| 1 e4 e5 2 f4 exf4 3 Nf3 h6 | C34 | King's Pawn-King's Knight's Gambit-Becker Defence |
| 1 e4 e5 2 f4 exf4 3 Nf3 Nc6 | C34 | King's Pawn-King's Knight's Gambit-MacLeod Defence |
| 1 e4 e5 2 f4 exf4 3 Nf3 Ne7 | C34 | King's Pawn-King's Knight's Gambit-Bonsch-Osmolovsky Variation |
| 1 e4 e5 2 f4 exf4 3 Nf3 Nf6 | C34 | King's Pawn-King's Knight's Gambit-Schallopp Defence |
| 1 e4 e5 2 f4 exf4 3 Nf3 Nf6 4 e5 Nh5 5 g4 | C34 | King's Pawn-King's Knight's Gambit-Schallop Defence-Tashkent Attack |
| 1 e4 e5 2 f4 exf4 3 Nf3 Nf6 4 e5 Nh5 5 Qe2 | C34 | King's Pawn-King's Knight's Gambit-Schallopp Defence-Keres Variation |
| 1 e4 e5 2 f4 exf4 3 Nh3 | C33 | King's Pawn-King's Gambit Accepted-Eisenberg Variation |
| 1 e4 e5 2 f4 exf4 3 Qe2 | C33 | King's Gambit Accepted-Carrera/Basman Gambit |
| 1 e4 e5 2 f4 exf4 3 Qf3 | C33 | King's Pawn-King's Gambit Accepted-Breyer Gambit |
| 1 e4 e5 2 f4 exf4 3 Qg4 | C33 | King's Pawn-King's Gambit Accepted-Dodo Variation |
| 1 e4 e5 2 f4 exf4 3 Qh5 | C33 | King's Pawn-King's Gambit Accepted-Carrera Gambit |
| 1 e4 e5 2 f4 f5 | C30 | King's Pawn-King's Gambit-Panteldakis Countergambit |
| 1 e4 e5 2 f4 f5 3 exf5 Bc5 | C30 | King's Pawn-King's Gambit-Panteldakis Countergambit-Schiller's Defence |
| 1 e4 e5 2 f4 f5 3 exf5 exf4 4 Nf3 d5 5 d4 Bd6 6 Bd3 | C30 | King's Pawn-King's Gambit-Panteldakis Countergambit-Symmetrical Variation |
| 1 e4 e5 2 f4 f5 3 exf5 exf4 4 Qh5+ g6 5 fxg6 Qe7+ 6 Kd1 | C30 | King's Pawn-King's Gambit-Panteldakis Countergambit-Pawn Sac Line |
| 1 e4 e5 2 f4 f5 3 exf5 exf4 4 Qh5+ Ke7 | C30 | King's Pawn-King's Gambit-Panteldakis Countergambit-Shirazi Line |
| 1 e4 e5 2 f4 f5 3 exf5 Qh4+ | C30 | King's Pawn-King's Gambit-Panteldakis Countergambit-Greco Variation |
| 1 e4 e5 2 f4 f6 3 fxe5 Nc6 | C30 | King's Pawn-King's Gambit Declined-Soller-Zilbermints Gambit |
| 1 e4 e5 2 f4 g5 | C30 | King's Pawn-King's Gambit-Zilbermints Double Countergambit |
| 1 e4 e5 2 f4 Nc6 | C30 | King's Pawn-King's Gambit Declined-Queen's Knight Defence |
| 1 e4 e5 2 f4 Nc6 3 Nf3 f5 | C30 | King's Pawn-King's Gambit Declined-Queen's Knight Defence-Miles Defence |
| 1 e4 e5 2 f4 Nc6 3 Nf3 g5 | C30 | King's Pawn-King's Gambit Declined-Queen's Knight Defence-Zilbermints Double Gambit I |
| 1 e4 e5 2 f4 Nc6 3 Nf3 g5 4 fxg5 h6 | C30 | King's Gambit Declined-Queen's Knight Defence-Zilbermints Double Gambit I-Hobbs-Zilbermints Gambit |
| 1 e4 e5 2 f4 Nf6 | C31 | King's Pawn-King's Gambit Declined-Petrov's Defence |
| 1 e4 e5 2 f4 Qf6 | C30 | King's Pawn-King's Gambit Declined-Norwalde Variation |
| 1 e4 e5 2 f4 Qf6 3 Nc3 Qxf4 4 d4 | C30 | King's Pawn-King's Gambit Declined-Norwalde Variation-Schubert Variation |
| 1 e4 e5 2 f4 Qf6 3 Nf3 Qxf4 4 Nc3 Bb4 5 Bc4 | C30 | King's Pawn-King's Gambit Declined-Norwalde Variation-Buecker Gambit |
| 1 e4 e5 2 f4 Qh4+ 3 g3 Qe7 | C30 | King's Pawn-King's Gambit Declined-Keene's Defence |
| 1 e4 e5 2 g3 | C20 Explore | King's Pawn-Johansen Opening |
| 1 e4 e5 2 h3 | C20 Explore | King's Pawn-Morphy Opening |
| 1 e4 e5 2 Ke2 | C20 | King's Pawn-Bongcloud Attack |
| 1 e4 e5 2 Nc3 | C25 Explore | King's Pawn-Vienna Game |
| 1 e4 e5 2 Nc3 Bb4 3 Qg4 (Nf6) | C25 | King's Pawn-Vienna Game-Zhuravlev Countergambit |
| 1 e4 e5 2 Nc3 Bc5 | C25 | King's Pawn-Vienna Game-Anderssen Defence |
| 1 e4 e5 2 Nc3 Bc5 3 b4 Bxb4 4 f4 exf4 | C25 | King's Pawn-Vienna Game-Anderssen Defence-McDonnell Variation |
| 1 e4 e5 2 Nc3 Bc5 3 Na4 | C25 | King's Pawn-Vienna Game-Anderssen Defence-Hamppe-Meitner Variation |
| 1 e4 e5 2 Nc3 Bc5 3 Qg4 | C25 | King's Pawn-Vienna Game-Anderssen Defence-Giraffe Attack |
| 1 e4 e5 2 Nc3 d6 3 f4 | C25 | King's Pawn-Vienna Game-Omaha Gambit |
| 1 e4 e5 2 Nc3 Nc6 | C25 | King's Pawn-Vienna Game-Max Lange Defence |
| 1 e4 e5 2 Nc3 Nc6 3 Bc4 Bc5 4 Qg4 Qf6 5 Nd5 | C25 | King's Pawn-Vienna Game-Max Lange Defence-Meitner-Mieses Gambit |
| 1 e4 e5 2 Nc3 Nc6 3 Bc4 Nf6 4 f4 Nxe4 5 Nf3 | C25 | King's Pawn-Vienna Game-Max Lange Defence-Bronstein Gambit |
| 1 e4 e5 2 Nc3 Nc6 3 d4 | C25 | King's Pawn-Vienna Game-Max Lange Defence-Fyfe Gambit |
| 1 e4 e5 2 Nc3 Nc6 3 d4 f5 | C25 | Vienna Game-Max Lange Defence-Fyfe Gambit-Philidor Countergambit |
| 1 e4 e5 2 Nc3 Nc6 3 f4 | C25 | King's Pawn-Vienna Game-Max Lange Defence-Vienna Gambit |
| 1 e4 e5 2 Nc3 Nc6 3 f4 Bc5 4 fxe5 d6 | C25 | Vienna Game-Max Lange Defence-Vienna Gambit-Quelle Gambit |
| 1 e4 e5 2 Nc3 Nc6 3 f4 exf4 4 d4 | C25 | Vienna Game-Max Lange Defence-Vienna Gambit-Steinitz Gambit |
| 1 e4 e5 2 Nc3 Nc6 3 f4 exf4 4 d4 Qh4+ | C25 | Vienna Game-Vienna Gambit-Steinitz Gambit-Main Line |
| 1 e4 e5 2 Nc3 Nc6 3 f4 exf4 4 d4 Qh4+ 5 Ke2 b6 | C25 | Vienna Gambit-Steinitz Gambit-Main Line-Fraser-Minckwitz Defence |
| 1 e4 e5 2 Nc3 Nc6 3 f4 exf4 4 d4 Qh4+ 5 Ke2 b6 6 Nb5 Ba6 7 a4 g5 8 Nf3 Qh5 9 Ke1 Kd8 10 g4 | C25 | Vienna Gambit-Steinitz Gambit-Fraser-Minckwitz Defence-Bauer Variation |
| 1 e4 e5 2 Nc3 Nc6 3 f4 exf4 4 d4 Qh4+ 5 Ke2 d5 | C25 | Vienna Gambit-Steinitz Gambit-Main Line-Zukertort Defence |
| 1 e4 e5 2 Nc3 Nc6 3 f4 exf4 4 d4 Qh4+ 5 Ke2 d5 6 exd5 Qe7+ 7 Kf2 Qh4+ 8 g3 fxg3+ 9 hxg3 | C25 | Vienna Gambit-Steinitz Gambit-Zukertort Defence-Chigorin Variation |
| 1 e4 e5 2 Nc3 Nc6 3 f4 exf4 4 d4 Qh4+ 5 Ke2 d6 | C25 | Vienna Gambit-Steinitz Gambit-Main Line-Paulsen Defence |
| 1 e4 e5 2 Nc3 Nc6 3 f4 exf4 4 d4 Qh4+ 5 Ke2 g5 | C25 | Vienna Gambit-Steinitz Gambit-Main Line-Soerensen Defence |
| 1 e4 e5 2 Nc3 Nc6 3 f4 exf4 4 Nf3 | C25 | Vienna Game-Max Lange Defence-Vienna Gambit-Knight Variation |
| 1 e4 e5 2 Nc3 Nc6 3 f4 exf4 4 Nf3 Be7 | C25 | Vienna Game-Vienna Gambit-Knight Variation-Cunningham Defence |
| 1 e4 e5 2 Nc3 Nc6 3 f4 exf4 4 Nf3 g5 5 Bc4 g4 6 0-0 | C25 | Vienna Game-Vienna Gambit-Knight Variation-Hamppe-Muzio Gambit |
| 1 e4 e5 2 Nc3 Nc6 3 f4 exf4 4 Nf3 g5 5 Bc4 g4 6 0-0 gxf3 7 Qxf3 Ne5 8 Qxf4 Qf6 | C25 | Vienna Game-Knight Variation-Hamppe-Muzio Gambit-Dubois Variation |
| 1 e4 e5 2 Nc3 Nc6 3 f4 exf4 4 Nf3 g5 5 d4 | C25 | Vienna Game-Vienna Gambit-Knight Variation-Pierce Gambit |
| 1 e4 e5 2 Nc3 Nc6 3 f4 exf4 4 Nf3 g5 5 d4 g4 6 Bc4 gxf3 7 0-0 d5 8 exd5 Bg4 9 dxc6 | C25 | Vienna Game-Knight Variation-Pierce Gambit-Rushmere Attack |
| 1 e4 e5 2 Nc3 Nc6 3 f4 exf4 4 Nf3 g5 5 h4 g4 6 Ng5 | C25 | Vienna Game-Vienna Gambit-Knight Variation-Hamppe-Allgaier Gambit |
| 1 e4 e5 2 Nc3 Nc6 3 f4 exf4 4 Nf3 g5 5 h4 g4 6 Ng5 d6 | C25 | Vienna Game-Knight Variation-Hamppe-Allgaier Gambit-Alapin Variation |
| 1 e4 e5 2 Nc3 Nc6 3 f4 exf4 4 Nf3 g5 5 h4 g4 6 Ng5 h6 7 Nxf7 Kxf7 8 d4 | C25 | Vienna Game-Vienna Gambit-Knight Variation-Hamppe-Allgaier-Thorold Gambit |
| 1 e4 e5 2 Nc3 Nc6 3 g3 | C25 | King's Pawn-Vienna Game-Max Lange Defence-Paulsen Variation |
| 1 e4 e5 2 Nc3 Nc6 3 g3 Bc5 4 Bg2 h5 5 Nf3 h4 | C25 | Vienna Game-Max Lange Defence-Paulsen Variation-Mariotti Gambit |
| 1 e4 e5 2 Nc3 Nc6 3 g3 Nf6 4 Bg2 Bc5 5 Nge2 d5 | C25 | Vienna Game-Max Lange Defence-Paulsen Variation-Unnamed Gambit |
| 1 e4 e5 2 Nc3 Nf6 | C26 | King's Pawn-Vienna Game-Falkbeer Variation |
| 1 e4 e5 2 Nc3 Nf6 3 a3 | C26 | King's Pawn-Vienna Game-Falkbeer Variation-Mengarini Variation |
| 1 e4 e5 2 Nc3 Nf6 3 Bc4 | C26 | King's Pawn-Vienna Game-Falkbeer Variation-Stanley Variation |
| 1 e4 e5 2 Nc3 Nf6 3 Bc4 Bb4 | C26 | Vienna Game-Falkbeer Variation-Stanley Variation-Reversed Spanish Variation |
| 1 e4 e5 2 Nc3 Nf6 3 Bc4 Bc5 4 d3 | C26 | Vienna Game-Falkbeer Variation-Stanley Variation-Spielmann Variation |
| 1 e4 e5 2 Nc3 Nf6 3 Bc4 Bc5 4 Nge2 b5 | C26 | Vienna Game-Falkbeer Variation-Stanley Variation-Eifel Gambit |
| 1 e4 e5 2 Nc3 Nf6 3 Bc4 Nc6 | C28 | Vienna Game-Falkbeer Variation-Stanley Variation-3 Knights Variation |
| 1 e4 e5 2 Nc3 Nf6 3 Bc4 Nxe4 | C27 | Vienna Game-Falkbeer Variation-Stanley Variation-Modern Variation |
| 1 e4 e5 2 Nc3 Nf6 3 Bc4 Nxe4 4 Nf3 | C27 | Vienna Game-Stanley Variation-Modern Variation-Boden-Kieseritsky Gambit |
| 1 e4 e5 2 Nc3 Nf6 3 Bc4 Nxe4 4 Nf3 d5 | C27 | Vienna Game-Modern Variation-Boden-Kieseritsky Gambit-Lichtenhein Defence |
| 1 e4 e5 2 Nc3 Nf6 3 Bc4 Nxe4 4 Qh5 Nd6 5 Bb3 Be7 | C27 | Vienna Game-Stanley Variation-Modern Variation-Monster Declined |
| 1 e4 e5 2 Nc3 Nf6 3 Bc4 Nxe4 4 Qh5 Nd6 5 Bb3 Be7 6 Nf3 Nc6 7 Nxe5 | C27 | Vienna Game-Modern Variation-Monster Declined-Alekhine Variation |
| 1 e4 e5 2 Nc3 Nf6 3 Bc4 Nxe4 4 Qh5 Nd6 5 Bb3 Nc6 6 d4 | C27 | Vienna Game-Stanley Variation-Modern Variation-Adams' Gambit |
| 1 e4 e5 2 Nc3 Nf6 3 Bc4 Nxe4 4 Qh5 (Nd6 5 Bb3 Nc6 6 Nb5 g6 7 Qf3 f5 8 Qd5 Qe7 9 Nxc7+ Kd8 10 Nxa8 b6) | C27 | Vienna Game-Stanley Variation-Modern Variation-Frankenstein-Dracula Variation |
| 1 e4 e5 2 Nc3 Nf6 3 f3 | C26 | King's Pawn-Vienna Game-Falkbeer Variation-Walkerling Variation |
| 1 e4 e5 2 Nc3 Nf6 3 f4 | C29 | King's Pawn-Vienna Game-Falkbeer Variation-Vienna Gambit |
| 1 e4 e5 2 Nc3 Nf6 3 f4 d5 | C29 | Vienna Game-Falkbeer Variation-Vienna Gambit-Main Line |
| 1 e4 e5 2 Nc3 Nf6 3 f4 d5 4 d3 | C29 | Vienna Game-Vienna Gambit-Main Line-Steinitz Variation |
| 1 e4 e5 2 Nc3 Nf6 3 f4 d5 4 d3 Bb4 5 fxe5 Nxe4 | C29 | Vienna Game-Vienna Gambit-Steinitz Variation-Blackburne Variation |
| 1 e4 e5 2 Nc3 Nf6 3 f4 d5 4 fxe5 Nxe4 5 d3 | C29 | Vienna Game-Vienna Gambit-Main Line-Modern Variation |
| 1 e4 e5 2 Nc3 Nf6 3 f4 d5 4 fxe5 Nxe4 5 d3 Qh4+ 6 g3 Nxg3 7 Nf3 Qh5 8 Nxd5 | C29 | Vienna Gambit-Main Line-Modern Variation-Würzburger Variation |
| 1 e4 e5 2 Nc3 Nf6 3 f4 d5 4 fxe5 Nxe4 5 d3 Qh4+ 6 g3 Nxg3 7 Nf3 Qh5 8 Nxd5 Bg4 9 Nf4 Bxf3 10 Nxh5 Bxd1 11 hxg3 Bxc2 12 b3 | C29 | Vienna Gambit-Modern Variation-Würzburger Variation-Würzburger Trap |
| 1 e4 e5 2 Nc3 Nf6 3 f4 d5 4 fxe5 Nxe4 5 Nf3 Bb4 6 Qe2 | C29 | Vienna Game-Vienna Gambit-Main Line-Spielmann Variation |
| 1 e4 e5 2 Nc3 Nf6 3 f4 d5 4 fxe5 Nxe4 5 Nf3 Be7 | C29 | Vienna Game-Vienna Gambit-Main Line-Breyer Variation |
| 1 e4 e5 2 Nc3 Nf6 3 f4 d5 4 fxe5 Nxe4 5 Nf3 Bg4 6 Qe2 | C29 | Vienna Game-Vienna Gambit-Main Line-Kaufmann Variation |
| 1 e4 e5 2 Nc3 Nf6 3 f4 d5 4 fxe5 Nxe4 5 Qf3 | C29 | Vienna Game-Vienna Gambit-Main Line-Paulsen Attack |
| 1 e4 e5 2 Nc3 Nf6 3 f4 d5 4 fxe5 Nxe4 5 Qf3 f5 | C29 | Vienna Gambit-Main Line-Paulsen Attack-Bardeleben Variation |
| 1 e4 e5 2 Nc3 Nf6 3 f4 d5 4 fxe5 Nxe4 5 Qf3 f5 6 d4 | C29 | Vienna Game-Paulsen Attack-Bardeleben Variation-Heyde Variation |
| 1 e4 e5 2 Nc3 Nf6 3 g3 | C26 | King's Pawn-Vienna Game-Falkbeer Variation-Paulsen-Mieses Variation |
| 1 e4 e5 2 Nc3 Nf6 3 g3 Bc5 4 Bg2 Nc6 5 Nge2 d5 6 exd5 | C26 | Vienna Game-Falkbeer Variation-Paulsen-Mieses Variation-Polluck Gambit |
| 1 e4 e5 2 Nc3 Nf6 3 g3 d5 4 exd5 c6 | C26 | Vienna Game-Falkbeer Variation-Paulsen-Mieses Variation-Erben Gambit |
| 1 e4 e5 2 Ne2 | C20 Explore | King's Pawn-Alapin's Opening |
| 1 e4 e5 2 Nf3 | C40 Explore | King's Pawn-King's Knight Opening |
| 1 e4 e5 2 Nf3 a6 | C40 Explore | King's Pawn-King's Knight Opening-Albin Gambit |
| 1 e4 e5 2 Nf3 b6 | C40 Explore | King's Pawn-King's Knight Opening-Berry Gambit |
| 1 e4 e5 2 Nf3 Bc5 | C40 Explore | King's Pawn-King's Knight Opening-Busch-Gass Gambit |
| 1 e4 e5 2 Nf3 Bc5 3 Nxe5 Nc6 | C40 | King's Pawn-King's Knight Opening-Busch-Gass Gambit-Chiodini Gambit |
| 1 e4 e5 2 Nf3 Bd6 | C40 Explore | King's Pawn-King's Knight Opening-Duck Opening |
| 1 e4 e5 2 Nf3 c5 | C40 Explore | King's Pawn-King's Knight Opening-Jalalabad Defence |
| 1 e4 e5 2 Nf3 c6 | C40 Explore | King's Pawn-King's Knight Opening-Gunderam Gambit |
| 1 e4 e5 2 Nf3 d5 | C40 Explore | King's Pawn-King's Knight Opening-Queen's Pawn/Elephant Countergambit |
| 1 e4 e5 2 Nf3 d5 3 exd5 Bd6 | C40 | King's Pawn-King's Knight Opening-Elephant Countergambit-Maróczy Gambit |
| 1 e4 e5 2 Nf3 d5 3 exd5 e4 | C40 | King's Pawn-King's Knight Opening-Elephant Countergambit-Paulsen Countergambit |
| 1 e4 e5 2 Nf3 d5 3 Nxe5 dxe4 4 Bc4 Qg5 | C40 | King's Pawn-King's Knight Opening-Elephant Countergambit-Wasp Variation |
| 1 e4 e5 2 Nf3 d6 | C41 Explore | King's Pawn-King's Knight Opening-Philidor's Defence |
| 1 e4 e5 2 Nf3 d6 3 Bc4 Be6 4 c3 | C41 | King's Pawn-King's Knight Opening-Philidor's Defence-Steinitz Variation |
| 1 e4 e5 2 Nf3 d6 3 Bc4 Be7 4 c3 | C41 | King's Pawn-King's Knight Opening-Philidor's Defence-Steinitz Variation |
| 1 e4 e5 2 Nf3 d6 3 Bc4 f5 | C41 | King's Pawn-King's Knight Opening-Philidor's Defence-López Countergambit |
| 1 e4 e5 2 Nf3 d6 3 Bc4 f5 4 d4 exd4 5 Ng5 Nh6 6 Nxh7 | C41 | King's Knight Opening-Philidor's Defence-López Countergambit-Jaenisch Variation |
| 1 e4 e5 2 Nf3 d6 3 d4 | C41 | King's Pawn-King's Knight Opening-Philidor's Defence-Main Line |
| 1 e4 e5 2 Nf3 d6 3 d4 Bd7 | C41 | King's Pawn-King's Knight Opening-Philidor's Defence-Philidor Gambit |
| 1 e4 e5 2 Nf3 d6 3 d4 Bg4 | C41 | King's Knight Opening-Philidor's Defence-Main Line-Harrwitz Variation |
| 1 e4 e5 2 Nf3 d6 3 d4 Bg4 4 dxe5 | C41 | King's Pawn-King's Knight Opening-Philidor's Defence-Blackburne Variation |
| 1 e4 e5 2 Nf3 d6 3 d4 Bg4 4 dxe5 Bxf3 | C41 | Philidor's Defence-Harrwitz Variation-Blackburne Variation-Main Line |
| 1 e4 e5 2 Nf3 d6 3 d4 Bg4 4 dxe5 Nd7 | C41 | King's Knight Opening-Philidor's Defence-Blackburne Variation-Alapin-Blackburne/Albin Gambit |
| 1 e4 e5 2 Nf3 d6 3 d4 exd4 | C41 | King's Pawn-King's Knight Opening-Philidor's Defence-Exchange Variation |
| 1 e4 e5 2 Nf3 d6 3 d4 exd4 4 Bc4 | C41 | King's Knight Opening-Philidor's Defence-Exchange Variation-Morphy Gambit |
| 1 e4 e5 2 Nf3 d6 3 d4 exd4 4 c3 | C41 | King's Knight Opening-Philidor's Defence-Exchange Variation-Bird Gambit |
| 1 e4 e5 2 Nf3 d6 3 d4 exd4 4 Nxd4 | C41 | King's Knight Opening-Philidor's Defence-Exchange Variation-Main Line |
| 1 e4 e5 2 Nf3 d6 3 d4 exd4 4 Nxd4 c5 | C41 | Philidor's Defence-Exchange Variation-Main Line-Knight Chase Variation |
| 1 e4 e5 2 Nf3 d6 3 d4 exd4 4 Nxd4 c5 5 Bb5+ | C41 | Philidor's Defence-Exchange Variation-Knight Chase Variation-Main Line |
| 1 e4 e5 2 Nf3 d6 3 d4 exd4 4 Nxd4 c5 5 Nf5 | C41 | Philidor's Defence-Exchange Variation-Knight Chase Variation-Jessica Simpson Variation |
| 1 e4 e5 2 Nf3 d6 3 d4 exd4 4 Nxd4 c5 5 Nf5 Nc6 | C41 | Philidor's Defence-Knight Chase Variation-Jessica Simpson Variation-Ashlee Simpson Variation |
| 1 e4 e5 2 Nf3 d6 3 d4 exd4 4 Nxd4 c5 5 Nf5 Nc6 6 Ne3 | C41 | Philidor's Defence-Jessica Simpson Variation-Ashlee Simpson Variation-Main Line |
| 1 e4 e5 2 Nf3 d6 3 d4 exd4 4 Nxd4 c5 5 Nf5 Nf6 | C41 | Philidor's Defence-Knight Chase Variation-Jessica Simpson Variation-Main Line |
| 1 e4 e5 2 Nf3 d6 3 d4 exd4 4 Nxd4 d5 5 exd5 | C41 | King's Knight Opening-Philidor's Defence-Exchange Variation-Paulsen Attack |
| 1 e4 e5 2 Nf3 d6 3 d4 exd4 4 Nxd4 g6 | C41 | King's Knight Opening-Philidor's Defence-Exchange Variation-Larsen Variation |
| 1 e4 e5 2 Nf3 d6 3 d4 exd4 4 Nxd4 Nf6 5 Nc3 Be7 6 Be2 0-0 7 0-0 c5 8 Nf3 Nc6 9 Bg5 Be6 10 Re1 | C41 | King's Knight Opening-Philidor's Defence-Exchange Variation-Berger Variation |
| 1 e4 e5 2 Nf3 d6 3 d4 exd4 4 Qxd4 | C41 | King's Knight Opening-Philidor's Defence-Exchange Variation-Morphy Variation |
| 1 e4 e5 2 Nf3 d6 3 d4 exd4 4 Qxd4 Bd7 | C41 | King's Knight Opening-Philidor's Defence-Morphy Variation-Boden's Defence |
| 1 e4 e5 2 Nf3 d6 3 d4 f5 | C41 | King's Pawn-King's Knight Opening-Philidor's Defence-Philidor Countergambit |
| 1 e4 e5 2 Nf3 d6 3 d4 f5 4 dxe5 fxe4 5 Ng5 d5 6 e6 | C41 | King's Knight Opening-Philidor's Defence-Philidor Countergambit-del Rio Attack |
| 1 e4 e5 2 Nf3 d6 3 d4 f5 4 dxe5 fxe4 5 Ng5 d5 6 e6 Bc5 7 Nc3 | C41 | Philidor's Defence-Philidor Countergambit-Del Rio Attack-Berger Variation |
| 1 e4 e5 2 Nf3 d6 3 d4 f5 4 Nc3 | C41 | King's Knight Opening-Philidor's Defence-Philidor Countergambit-Zukertort Variation |
| 1 e4 e5 2 Nf3 d6 3 d4 Nd7 | C41 | King's Pawn-King's Knight Opening-Philidor's Defence-Hanham Variation |
| 1 e4 e5 2 Nf3 d6 3 d4 Nd7 4 Bc4 c6 5 0-0 | C41 | King's Knight Opening-Philidor's Defence-Hanham Variation-Krause Variation |
| 1 e4 e5 2 Nf3 d6 3 d4 Nd7 4 Bc4 c6 5 0-0 Be7 6 dxe5 | C41 | Philidor's Defence-Hanham Variation-Krause Variation-Steiner Variation |
| 1 e4 e5 2 Nf3 d6 3 d4 Nd7 4 Bc4 c6 5 a4 | C41 | King's Knight Opening-Philidor's Defence-Hanham Variation-Nimzovich Variation |
| 1 e4 e5 2 Nf3 d6 3 d4 Nd7 4 Bc4 c6 5 c3 | C41 | King's Knight Opening-Philidor's Defence-Hanham Variation-Delmar Variation |
| 1 e4 e5 2 Nf3 d6 3 d4 Nd7 4 Bc4 c6 5 Nc3 | C41 | King's Knight Opening-Philidor's Defence-Hanham Variation-Schlechter Variation |
| 1 e4 e5 2 Nf3 d6 3 d4 Nd7 4 Bc4 c6 5 Ng5 | C41 | King's Knight Opening-Philidor's Defence-Hanham Variation-Kmoch Variation |
| 1 e4 e5 2 Nf3 d6 3 d4 Nd7 4 Bc4 c6 5 Ng5 Nh6 6 f4 Be7 7 0-0 0-0 8 c3 d5 | C41 | Philidor's Defence-Hanham Variation-Kmoch Variation-Berger Variation |
| 1 e4 e5 2 Nf3 d6 3 d4 Nd7 4 Bc4 c6 5 Ng5 Nh6 6 f4 Be7 7 c3 0-0 8 0-0 d5 | C41 | Philidor's Defence-Hanham Variation-Kmoch Variation-Berger Variation |
| 1 e4 e5 2 Nf3 d6 3 d4 Nd7 4 Bc4 Nb6 | C41 | King's Knight Opening-Philidor's Defence-Hanham Variation-Sharp Variation |
| 1 e4 e5 2 Nf3 d6 3 d4 Nd7 4 Nc3 Ngf6 | C41 | King's Knight Opening-Philidor's Defence-Hanham Variation-Lion Variation |
| 1 e4 e5 2 Nf3 d6 3 d4 Nd7 4 Nc3 Ngf6 5 Bc4 Be7 6 0-0 h6 | C41 | Philidor's Defence-Hanham Variation-Lion Variation-Lion's Claw II |
| 1 e4 e5 2 Nf3 d6 3 d4 Nd7 4 Nc3 Ngf6 5 Be2 Be7 6 0-0 c6 | C41 | Philidor's Defence-Hanham Variation-Lion Variation-Lion's Claw I |
| 1 e4 e5 2 Nf3 d6 3 d4 Nd7 4 Nc3 Ngf6 5 g4 | C41 | Philidor's Defence-Hanham Variation-Lion Variation-Shirov Gambit |
| 1 e4 e5 2 Nf3 d6 3 d4 Nf6 | C41 | King's Pawn-King's Knight Opening-Philidor's Defence-Jaenisch Variation |
| 1 e4 e5 2 Nf3 d6 3 d4 Nf6 4 Bc4 | C41 | King's Pawn-King's Knight Opening-Philidor's Defence-Jaenisch Variation-Klein Variation |
| 1 e4 e5 2 Nf3 d6 3 d4 Nf6 4 dxe5 | C41 | King's Knight Opening-Philidor's Defence-Jaenisch Variation-Nimzowitsch Variation |
| 1 e4 e5 2 Nf3 d6 3 d4 Nf6 4 dxe5 Nxe4 5 Nbd2 | C41 | Philidor's Defence-Jaenisch Variation-Nimzowitsch Variation-Sokolsky Variation |
| 1 e4 e5 2 Nf3 d6 3 d4 Nf6 4 dxe5 Nxe4 5 Qd5 | C41 | Philidor's Defence-Jaenisch Variation-Nimzowitsch Variation-Rellstab Variation |
| 1 e4 e5 2 Nf3 d6 3 d4 Nf6 4 Nc3 exd4 5 Nxd4 Be7 6 Be2 0-0 7 0-0 c5 8 Nf3 Nc6 9 Bg5 Be6 10 Re1 | C41 | King's Knight Opening-Philidor's Defence-Jaenisch Variation-Berger Variation |
| 1 e4 e5 2 Nf3 d6 3 d4 Nf6 4 Nc3 Nbd7 | C41 | King's Knight Opening-Philidor's Defence-Jaenisch Variation-Improved Hanham Variation |
| 1 e4 e5 2 Nf3 d6 3 d4 Nf6 4 Nc3 Nbd7 5 Bc4 Be7 | C41 | Philidor's Defence-Jaenisch Variation-Improved Hanham Variation-Lion Variation |
| 1 e4 e5 2 Nf3 d6 3 d4 Nf6 4 Nc3 Nbd7 5 Bc4 Be7 6 0-0 0-0 7 Qe2 c6 8 a4 exd4 | C41 | Philidor's Defence-Improved Hanham Variation-Lion Variation-Sozin Variation |
| 1 e4 e5 2 Nf3 d6 3 d4 Nf6 4 Nc3 Nbd7 5 Bc4 Be7 6 Bxf7+ | C41 | Philidor's Defence-Improved Hanham Variation-Lion Variation-Bishop Sac Variation |
| 1 e4 e5 2 Nf3 d6 3 d4 Nf6 4 Nc3 Nbd7 5 Bc4 Be7 6 dxe5 dxe5 7 Bxf7+ | C41 | Philidor's Defence-Improved Hanham Variation-Lion Variation-Delayed Bishop Sac Variation |
| 1 e4 e5 2 Nf3 d6 3 d4 Nf6 4 Nc3 Nbd7 5 Bc4 Be7 6 Ng5 0-0 7 Bxf7+ | C41 | Philidor's Defence-Improved Hanham Variation-Lion Variation-Lärobok Variation |
| 1 e4 e5 2 Nf3 d6 3 d4 Nf6 4 Nc3 Nbd7 5 Bc4 Be7 6 Ng5 0-0 7 Bxf7+ Rxf7 8 Ne6 | C41 | Philidor's Defence-Lion Variation-Larobok Variation-Forcing Line |
| 1 e4 e5 2 Nf3 d6 3 d4 Nf6 4 Nc3 Nbd7 5 Bc4 h6 | C41 | King's Knight Opening-Jaenisch Variation-Improved Hanham Variation-Jansen Variation |
| 1 e4 e5 2 Nf3 d6 3 d4 Nf6 4 Ng5 | C41 | King's Knight Opening-Philidor's Defence-Jaenisch Variation-Locock Variation |
| 1 e4 e5 2 Nf3 d6 3 d4 Nf6 4 Ng5 h6 5 Nxf7 | C41 | King's Knight Opening-Jaenisch Variation-Locock Variation-Locock Gambit |
| 1 e4 e5 2 Nf3 f5 | C40 Explore | King's Pawn-King's Knight Opening-Latvian/Greco Countergambit |
| 1 e4 e5 2 Nf3 f5 3 b4 | C40 | King's Pawn-King's Knight Opening-Latvian Countergambit-Senechaud Gambit |
| 1 e4 e5 2 Nf3 f5 3 Bc4 | C40 | King's Pawn-King's Knight Opening-Latvian Countergambit-Mayet Attack |
| 1 e4 e5 2 Nf3 f5 3 Bc4 b5 | C40 | King's Knight Opening-Latvian Countergambit-Mayet Attack-Strautins Gambit |
| 1 e4 e5 2 Nf3 f5 3 Bc4 fxe4 4 Nxe5 d5 | C40 | King's Knight Opening-Latvian Countergambit-Mayet Attack-Polerio-Svedenborg Variation |
| 1 e4 e5 2 Nf3 f5 3 Bc4 fxe4 4 Nxe5 Nf6 | C40 | King's Knight Opening-Latvian Countergambit-Mayet Attack-Corkscrew Countergambit |
| 1 e4 e5 2 Nf3 f5 3 Bc4 fxe4 4 Nxe5 Qg5 5 d4 Qxg2 | C40 | King's Knight Opening-Latvian Countergambit-Mayet Attack-Poisoned Pawn Variation |
| 1 e4 e5 2 Nf3 f5 3 Bc4 fxe4 4 Nxe5 Qg5 5 Nf7 Qxg2 6 Rf1 d5 7 Nxh8 Nf6 | C40 | King's Knight Opening-Latvian Countergambit-Mayet Attack-Behting Variation |
| 1 e4 e5 2 Nf3 f5 3 Bc4 Nf6 | C40 | King's Knight Opening-Latvian Countergambit-Mayet Attack-Morgado Defence |
| 1 e4 e5 2 Nf3 f5 3 c4 | C40 | King's Pawn-King's Knight Opening-Latvian Countergambit-Diepstraten Countergambit |
| 1 e4 e5 2 Nf3 f5 3 d3 Nc6 4 exf5 | C40 | King's Pawn-King's Knight Opening-Latvian Countergambit-Clam Gambit |
| 1 e4 e5 2 Nf3 f5 3 d4 | C40 | King's Pawn-King's Knight Opening-Latvian Countergambit-Mason Countergambit |
| 1 e4 e5 2 Nf3 f5 3 exf5 | C40 | King's Pawn-King's Knight Opening-Latvian Countergambit Accepted |
| 1 e4 e5 2 Nf3 f5 3 g4 | C40 | King's Pawn-King's Knight Opening-Latvian Countergambit-Lobster Gambit |
| 1 e4 e5 2 Nf3 f5 3 Nc3 | C40 | King's Pawn-King's Knight Opening-Latvian Countergambit-Mlotkowski Variation |
| 1 e4 e5 2 Nf3 f5 3 Nxe5 Nc6 | C40 | King's Pawn-King's Knight Opening-Latvian Gambit-Fraser & Moller's Defence |
| 1 e4 e5 2 Nf3 f5 3 Nxe5 Nf6 4 Bc4 fxe4 5 Nf7 Qe7 6 Nxh8 d5 | C40 | King's Pawn-King's Knight Opening-Latvian Countergambit-Corkscrew Gambit |
| 1 e4 e5 2 Nf3 f5 3 Nxe5 Qe7 | C40 | King's Pawn-King's Knight Opening-Latvian Countergambit-Greco Variation |
| 1 e4 e5 2 Nf3 f5 3 Nxe5 Qf6 4 d4 | C40 | King's Pawn-King's Knight Opening-Latvian Countergambit Accepted-Main Line |
| 1 e4 e5 2 Nf3 f5 3 Nxe5 Qf6 4 d4 d6 5 Nc4 | C40 | King's Knight Opening-Latvian Countergambit Accepted-Main Line-Bilguer Variation |
| 1 e4 e5 2 Nf3 f5 3 Nxe5 Qf6 4 d4 d6 5 Nc4 fxe4 6 Be2 | C40 | King's Knight Opening-Latvian Countergambit Accepted-Bilguer Variation-Bronstein Attack |
| 1 e4 e5 2 Nf3 f5 3 Nxe5 Qf6 4 d4 d6 5 Nc4 fxe4 6 Nc3 Qg6 | C40 | King's Knight Opening-Latvian Countergambit Accepted-Bilguer Variation-Modern Variation |
| 1 e4 e5 2 Nf3 f5 3 Nxe5 Qf6 4 d4 d6 5 Nc4 fxe4 6 Ne3 | C40 | King's Knight Opening-Latvian Countergambit Accepted-Bilguer Variation-Nimzowitsch Attack |
| 1 e4 e5 2 Nf3 f5 3 Nxe5 Qf6 4 d4 d6 5 Nc4 fxe4 6 Qh5+ g6 7 Qe2 | C40 | King's Knight Opening-Latvian Countergambit Accepted-Bilguer Variation-Bronstein Gambit |
| 1 e4 e5 2 Nf3 f5 3 Nxe5 Qf6 4 Nc4 | C40 | King's Pawn-King's Knight Opening-Latvian Countergambit-Foltys-Leonhardt Variation |
| 1 e4 e5 2 Nf3 f5 3 Nxe5 Qf6 4 Nc4 fxe4 5 d3 | C40 | King's Knight Opening-Latvian Countergambit-Foltys-Leonhardt Variation-Foltys Variation |
| 1 e4 e5 2 Nf3 f5 3 Nxe5 Qf6 4 Nc4 fxe4 5 Nc3 | C40 | King's Knight Opening-Latvian Countergambit-Foltys-Leonhardt Variation-Leonhardt Variation |
| 1 e4 e5 2 Nf3 f6 | C40 Explore | King's Pawn-King's Knight Opening-Damiano Defence |
| 1 e4 e5 2 Nf3 f6 3 Nxe5 (fxe5 4 Qh5+ g6 5 Qxe5+ Qe7 6 Qxh8) | C40 | King's Pawn-King's Knight Opening-Damiano Defence-Damiano Gambit |
| 1 e4 e5 2 Nf3 f6 3 Nxe5 Qe7 4 Nf3 d5 | C40 | King's Knight Opening-Damiano Defence-Damiano Gambit-Chigorin Gambit |
| 1 e4 e5 2 Nf3 g6 | C40 Explore | King's Pawn-King's Knight's Opening-Wittoch Gambit |
| 1 e4 e5 2 Nf3 Nc6 | C44 Explore | King's Pawn-King's Knight Opening-Normal/Queen's Knight Game (Italian Game) |
| 1 e4 e5 2 Nf3 Nc6 3 a3 | C44 Explore | King's Pawn-King's Knight Opening-McStraw Opening |
| 1 e4 e5 2 Nf3 Nc6 3 b3 | C44 Explore | King's Pawn-King's Knight Opening-Palmiotto Opening |
| 1 e4 e5 2 Nf3 Nc6 3 b4 | C44 Explore | King's Pawn-King's Knight Opening-Italian Game-Paschman Wing Gambit |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 | C60 Explore | King's Pawn-King's Knight Opening-Italian Game-Ruy Lopez |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a5 | C60 Explore | King's Pawn-King's Knight Opening-Ruy Lopez-Bulgarian Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 | C60 Explore | King's Pawn-King's Knight Opening-Ruy Lopez-Morphy Defence |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 | C70 Explore | King's Knight Opening-Ruy Lopez-Morphy Defence-Columbus Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 b5 | C70 | Ruy Lopez-Morphy Defence-Columbus Variation-Caro Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 b5 5 Bb3 Bc5 | C70 | Ruy Lopez-Columbus Variation-Caro Variation-Graz Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 b5 5 Bb3 Na5 | C70 | Ruy Lopez-Columbus Variation-Caro Variation-Taimanov/Chase/Wing/Accelerated Counterthrust/Norwegian Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 b5 5 Bb3 Na5 6 Bxf7+ | C70 | Ruy Lopez-Columbus Variation-Caro Variation-Taimanov Variation-Nightingale Gambit |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Bb4 | C70 | Ruy Lopez-Morphy Defence-Columbus Variation-Alapin's Defence Deferred |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Bc5 | C70 | Ruy Lopez-Morphy Defence-Columbus Variation-Classical Defence Deferred |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 d6 | C71 | Ruy Lopez-Morphy Defence-Columbus Variation-Modern Steinitz Defence |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 d6 5 0-0 | C72 | Ruy Lopez-Morphy Defence-Columbus Variation-Modern Steinitz Defence |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 d6 5 Bxc6+ bxc6 6 d4 | C73 | Ruy Lopez-Columbus Variation-Modern Steinitz Defence-Richter Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 d6 5 Bxc6+ bxc6 6 d4 f6 | C73 | Ruy Lopez-Modern Steinitz Defence-Richter Variation-Alapin Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 d6 5 c3 | C74 | Ruy Lopez-Morphy Defence-Columbus Variation-Modern Steinitz Defence |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 d6 5 c3 Bd7 | C75 | Ruy Lopez-Morphy Defence-Columbus Variation-Modern Steinitz Defence |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 d6 5 c3 Bd7 6 d4 g6 | C76 | Ruy Lopez-Columbus Variation-Modern Steinitz Defence-Fianchetto/Bronstein Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 d6 5 c3 Bd7 6 d4 Nge7 | C75 | Ruy Lopez-Columbus Variation-Modern Steinitz Defence-Rubinstein Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 d6 5 c3 f5 | C74 | Ruy Lopez-Columbus Variation-Modern Steinitz Defence-Siesta Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 d6 5 c3 f5 6 exf5 Bxf5 7 0-0 | C74 | Ruy Lopez-Modern Steinitz Defence-Siesta Variation-Kopayev Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 d6 5 c4 | C71 | Ruy Lopez-Columbus Variation-Modern Steinitz Defence-Duras/Keres Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 d6 5 d4 b5 6 Bb3 exd4 7 Nxd4 Nxd4 8 Qxd4 | C71 | Ruy Lopez-Columbus Variation-Modern Steinitz Defence-Noah's Ark Trap |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 d6 5 d4 b5 6 Bb3 Nxd4 7 Nxd4 exd4 8 Qxd4 c5 | C71 | Ruy Lopez-Columbus Variation-Modern Steinitz Defence-Noah's Ark Trap |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 d6 5 Nc3 | C71 | Ruy Lopez-Columbus Variation-Modern Steinitz Defence-3 Knights Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 f5 | C70 | Ruy Lopez-Morphy Defence-Columbus Variation-Schliemann Defence Deferred |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 f5 5 exf5 | C70 | Ruy Lopez-Columbus Variation-Schliemann Defence Deferred-Jaenisch Gambit Deferred |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 g5 | C70 | Ruy Lopez-Morphy Defence-Columbus Variation-Brentano Gambit Deferred |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 g6 | C70 | Ruy Lopez-Morphy Defence-Columbus Variation-Fianchetto/Barnes Defence Deferred |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nd4 | C70 | Ruy Lopez-Morphy Defence-Columbus Variation-Bird's Defence Deferred |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 | C77 Explore | King's Knight Opening-Ruy Lopez-Morphy Defence-Columbus Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 | C78 Explore | King's Knight Opening-Ruy Lopez-Morphy Defence-Columbus Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 b5 | C78 | Ruy Lopez-Morphy Defence-Columbus Variation-Archangelsk Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 b5 6 Bb3 Bb7 | C78 | Ruy Lopez-Columbus Variation-Archangelsk Variation-Counterthrust/Planinc Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 b5 6 Bb3 Be7 7 a4 | C78 | Ruy Lopez-Columbus Variation-Archangelsk Variation-Wing Attack |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 b5 6 Bb3 d6 7 Ng5 d5 8 exd5 Nd4 9 Re1 Bc5 10 Rxe5+ Kf8 | C78 | Ruy Lopez-Columbus Variation-Archangelsk Variation-Rabinovich Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Bc5 | C78 | Ruy Lopez-Morphy Defence-Columbus Variation-Möller/Neo-Archangelsk Defence |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 | C84 Explore | Ruy Lopez-Morphy Defence-Columbus Variation-Closed Defence |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Bxc6 | C85 | Ruy Lopez-Columbus Variation-Closed Defence-Exchange Variation Doubly Deferred/DERLD/Steenwijker Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 d3 | C84 | Ruy Lopez-Columbus Variation-Closed Defence-Martinez Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 d4 | C84 | Ruy Lopez-Columbus Variation-Closed Defence-Centre Attack |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 d4 b5 7 Bb3 d6 8 c3 Bg4 9 h3 Bxf3 10 Qxf3 exd4 | C84 | Ruy Lopez-Closed Defence-Centre Attack-Bronstein-Nezmetdinov Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 d4 exd4 7 e5 Ne4 8 c3 | C84 | Ruy Lopez-Closed Defence-Centre Attack-North Spanish Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 d4 exd4 7 e5 Ne4 8 c3 dxc3 | C84 | Ruy Lopez-Centre Attack-North Spanish Variation-Basque Gambit |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Nc3 | C84 | Ruy Lopez-Columbus Variation-Closed Defence-Morphy/Knight Attack |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Qe2 | C86 | Ruy Lopez-Columbus Variation-Closed Defence-Worrall Attack |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Qe2 b5 7 Bb3 0-0 | C86 | Ruy Lopez-Closed Defence-Worrall Attack-Sharp/Caslting Line |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Qe2 b5 7 Bb3 d6 | C86 | Ruy Lopez-Closed Defence-Worrall Attack-Solid/Delayed Castling Line |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Re1 b5 7 Bb3 | C88 Explore | Ruy Lopez-Morphy Defence-Columbus Variation-Closed Defence |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Re1 b5 7 Bb3 0-0 8 a4 | C88 | Ruy Lopez-Columbus Variation-Closed Defence-Anti-Marshall Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Re1 b5 7 Bb3 0-0 8 c3 d5 | C89 Explore | Ruy Lopez-Columbus Variation-Closed Defence-Marshall Counterattack |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Re1 b5 7 Bb3 0-0 8 c3 d5 9 exd5 e4 | C89 | Ruy Lopez-Closed Defence-Marshall Counterattack-Herman Steiner Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Re1 b5 7 Bb3 0-0 8 c3 d5 9 exd5 Nxd5 10 Nxe5 Nxe5 11 Rxe5 c6 | C89 Explore | Ruy Lopez-Closed Defence-Marshall Counterattack-Modern Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Re1 b5 7 Bb3 0-0 8 c3 d5 9 exd5 Nxd5 10 Nxe5 Nxe5 11 Rxe5 c6 12 Bxd5 cxd5 13 d4 Bd6 14 Re3 | C89 | Ruy Lopez-Marshall Counterattack-Modern Variation-Kevitz Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Re1 b5 7 Bb3 0-0 8 c3 d5 9 exd5 Nxd5 10 Nxe5 Nxe5 11 Rxe5 c6 12 d4 | C89 Explore | Ruy Lopez-Marshall Counterattack-Modern Variation-Main Line |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Re1 b5 7 Bb3 0-0 8 c3 d5 9 exd5 Nxd5 10 Nxe5 Nxe5 11 Rxe5 c6 12 d4 Bd6 13 Re1 Qh4 14 g3 Qh3 | C89 Explore | Ruy Lopez-Modern Variation-Main Line-Modern Main Line |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Re1 b5 7 Bb3 0-0 8 c3 d5 9 exd5 Nxd5 10 Nxe5 Nxe5 11 Rxe5 c6 12 d4 Bd6 13 Re1 Qh4 14 g3 Qh3 15 Be3 Bg4 16 Qd3 Rae8 17 Nd2 Re6 18 a4 Qh5 | C89 Explore | Ruy Lopez-Modern Variation-Modern Main Line-Spassky Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Re1 b5 7 Bb3 0-0 8 c3 d5 9 exd5 Nxd5 10 Nxe5 Nxe5 11 Rxe5 Nf6 | C89 | Ruy Lopez-Closed Defence-Marshall Counterattack-Original Marshall Attack |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Re1 b5 7 Bb3 0-0 8 c3 d6 | C90 | Ruy Lopez-Morphy Defence-Columbus Variation-Closed Defence |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Re1 b5 7 Bb3 0-0 8 c3 d6 9 a3 | C90 | Ruy Lopez-Columbus Variation-Closed Defence-Suetin Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Re1 b5 7 Bb3 0-0 8 c3 d6 9 Bc2 | C90 | Ruy Lopez-Columbus Variation-Closed Defence-Lutikov Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Re1 b5 7 Bb3 0-0 8 c3 d6 9 d3 | C90 | Ruy Lopez-Columbus Variation-Closed Defence-Pilnik Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Re1 b5 7 Bb3 0-0 8 c3 d6 9 d4 | C91 | Ruy Lopez-Columbus Variation-Closed Defence-Yates Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Re1 b5 7 Bb3 0-0 8 c3 d6 9 d4 Bg4 | C91 | Ruy Lopez-Closed Defence-Yates Variation-Bogoljubov Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Re1 b5 7 Bb3 0-0 8 c3 d6 9 d4 Bg4 10 a4 | C91 | Ruy Lopez-Yates Variation-Bogoljubov Variation-Short Attack |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Re1 b5 7 Bb3 0-0 8 c3 d6 9 h3 | C92 | Ruy Lopez-Morphy Defence-Columbus Variation-Closed Defence |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Re1 b5 7 Bb3 0-0 8 c3 d6 9 h3 a5 | C92 | Ruy Lopez-Columbus Variation-Closed Defence-Keres Defence |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Re1 b5 7 Bb3 0-0 8 c3 d6 9 h3 Bb7 | C92 | Ruy Lopez-Columbus Variation-Closed Defence-Flohr-Zaitsev/Lenzerheide System |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Re1 b5 7 Bb3 0-0 8 c3 d6 9 h3 Be6 | C92 | Ruy Lopez-Columbus Variation-Closed Defence-Kholmov Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Re1 b5 7 Bb3 0-0 8 c3 d6 9 h3 h6 | C93 | Ruy Lopez-Columbus Variation-Closed Defence-Smyslov Defence |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Re1 b5 7 Bb3 0-0 8 c3 d6 9 h3 Na5 10 Bc2 | C96 | Ruy Lopez-Morphy Defence-Columbus Variation-Closed Defence |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Re1 b5 7 Bb3 0-0 8 c3 d6 9 h3 Na5 10 Bc2 c5 11 d4 Nc6 | C96 | Ruy Lopez-Columbus Variation-Closed Defence-Borisenko Defence |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Re1 b5 7 Bb3 0-0 8 c3 d6 9 h3 Na5 10 Bc2 c5 11 d4 Nd7 | C96 | Ruy Lopez-Columbus Variation-Closed Defence-Keres Defence |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Re1 b5 7 Bb3 0-0 8 c3 d6 9 h3 Na5 10 Bc2 c5 11 d4 Qc7 | C97 | Ruy Lopez-Columbus Variation-Closed Defence-Chigorin Defence |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Re1 b5 7 Bb3 0-0 8 c3 d6 9 h3 Na5 10 Bc2 c5 11 d4 Qc7 12 Nbd2 Bd7 13 Nf1 Rfe8 14 Ne3 g6 | C97 | Ruy Lopez-Closed Defence-Chigorin Defence-Yugoslav System |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Re1 b5 7 Bb3 0-0 8 c3 d6 9 h3 Na5 10 Bc2 c5 11 d4 Qc7 12 Nbd2 cxd4 13 cxd4 | C99 | Ruy Lopez-Closed Defence-Chigorin Defence-Panov System |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Re1 b5 7 Bb3 0-0 8 c3 d6 9 h3 Na5 10 Bc2 c5 11 d4 Qc7 12 Nbd2 Nc6 | C98 | Ruy Lopez-Columbus Variation-Closed Defence-Chigorin Defence |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Re1 b5 7 Bb3 0-0 8 c3 d6 9 h3 Na5 10 Bc2 c5 11 d4 Qc7 12 Nbd2 Nc6 13 dxc5 | C98 | Ruy Lopez-Closed Defence-Chigorin Defence-Rauzer Attack |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Re1 b5 7 Bb3 0-0 8 c3 d6 9 h3 Na5 10 Bc2 c6 11 d4 Qc7 | C96 | Ruy Lopez-Columbus Variation-Closed Defence-Rossolimo Defence |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Re1 b5 7 Bb3 0-0 8 c3 d6 9 h3 Nb8 | C94 | Ruy Lopez-Columbus Variation-Closed Defence-Breyer Defence |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Re1 b5 7 Bb3 0-0 8 c3 d6 9 h3 Nb8 10 d3 | C94 | Ruy Lopez-Closed Defence-Breyer Defence-Quiet Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Re1 b5 7 Bb3 0-0 8 c3 d6 9 h3 Nb8 10 d4 | C95 | Ruy Lopez-Columbus Variation-Closed Defence-Breyer Defence |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Re1 b5 7 Bb3 0-0 8 c3 d6 9 h3 Nb8 10 d4 Nbd7 | C95 | Ruy Lopez-Closed Defence-Breyer Defence-Borisenko Variation/Zaitsev Hybrid |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Re1 b5 7 Bb3 0-0 8 c3 d6 9 h3 Nb8 10 d4 Nbd7 11 Nbd2 Bb7 12 Bc2 c5 | C95 | Ruy Lopez-Closed Defence-Borisenko Variation-Gligoric Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Re1 b5 7 Bb3 0-0 8 c3 d6 9 h3 Nb8 10 d4 Nbd7 11 Nh4 | C95 | Ruy Lopez-Closed Defence-Borisenko Variation-Simagin Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Re1 b5 7 Bb3 0-0 8 c3 d6 9 h3 Nd7 | C92 | Ruy Lopez-Columbus Variation-Closed Defence-Ragozin-Petrosian/Keres |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Re1 b5 7 Bb3 0-0 8 c3 d6 9 h3 Re8 | C92 | Ruy Lopez-Columbus Variation-Closed Defence-Zaitsev System |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Re1 b5 7 Bb3 0-0 8 c3 d6 9 h3 Re8 10 d4 Bb7 11 Nbd2 Bf8 12 a3 h6 | C93 | Ruy Lopez-Closed Defence-Zaitsev System-Smyslov-Breyer-Zaitsev Hybrid |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Re1 b5 7 Bb3 Bb7 | C88 | Ruy Lopez-Columbus Variation-Closed Defence-Trajkovic Counterattack |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Re1 b5 7 Bb3 d6 8 c3 0-0 9 a3 | C88/C90 | Ruy Lopez-Columbus Variation-Closed Defence-Suetin Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Re1 b5 7 Bb3 d6 8 c3 0-0 9 Bc2 | C88/C90 | Ruy Lopez-Columbus Variation-Closed Defence-Lutikov Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Re1 b5 7 Bb3 d6 8 c3 0-0 9 d3 | C88/C90 | Ruy Lopez-Columbus Variation-Closed Defence-Pilnik Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Re1 b5 7 Bb3 d6 8 c3 0-0 9 d4 | C88/C91 | Ruy Lopez-Columbus Variation-Closed Defence-Yates Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Re1 b5 7 Bb3 d6 8 c3 0-0 9 d4 Bg4 | C88/C91 | Ruy Lopez-Closed Defence-Yates Variation-Bogolubov Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Re1 b5 7 Bb3 d6 8 c3 0-0 9 h3 | C88/C92 | Ruy Lopez-Morphy Defence-Columbus Variation-Closed Defence |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Re1 b5 7 Bb3 d6 8 c3 0-0 9 h3 a5 | C88/C92 | Ruy Lopez-Columbus Variation-Closed Defence-Keres Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Re1 b5 7 Bb3 d6 8 c3 0-0 9 h3 Bb7 | C88/C92 | Ruy Lopez-Columbus Variation-Closed Defence-Lenzerheide Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Re1 b5 7 Bb3 d6 8 c3 0-0 9 h3 Be6 | C88/C92 | Ruy Lopez-Columbus Variation-Closed Defence-Kholmov Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Re1 b5 7 Bb3 d6 8 c3 0-0 9 h3 h6 | C88/C93 | Ruy Lopez-Columbus Variation-Closed Defence-Smyslov Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Re1 b5 7 Bb3 d6 8 c3 0-0 9 h3 h6 10 d4 Re8 11 Nbd2 Bf8 12 a3 | C88/C93 | Ruy Lopez-Closed Defence-Smyslov Variation-Smyslov-Breyer Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Re1 b5 7 Bb3 d6 8 c3 0-0 9 h3 Na5 | C88/C96 | Ruy Lopez-Columbus Variation-Closed Defence-Berger Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Re1 b5 7 Bb3 d6 8 c3 0-0 9 h3 Na5 10 Bc2 c5 11 d4 Bb7 12 Nbd2 cxd4 13 cxd4 Nc6 | C88/C96 | Ruy Lopez-Closed Defence-Berger Variation-Russian Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Re1 b5 7 Bb3 d6 8 c3 0-0 9 h3 Na5 10 Bc2 c5 11 d4 Nc6 | C88/C96 | Ruy Lopez-Closed Defence-Berger Variation-Borisenko Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Re1 b5 7 Bb3 d6 8 c3 0-0 9 h3 Na5 10 Bc2 c5 11 d4 Nd7 | C88/C96 | Ruy Lopez-Closed Defence-Berger Variation-Keres Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Re1 b5 7 Bb3 d6 8 c3 0-0 9 h3 Na5 10 Bc2 c5 11 d4 Qc7 | C88/C97 | Ruy Lopez-Closed Defence-Berger Variation-Chigorin Defence |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Re1 b5 7 Bb3 d6 8 c3 0-0 9 h3 Na5 10 Bc2 c5 11 d4 Qc7 12 Nbd2 Bd7 13 Nf1 Rfe8 14 Ne3 g6 | C88/C97 | Ruy Lopez-Berger Variation-Chigorin Defence-Yugoslav System |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Re1 b5 7 Bb3 d6 8 c3 0-0 9 h3 Na5 10 Bc2 c5 11 d4 Qc7 12 Nbd2 cxd4 | C88/C99 | Ruy Lopez-Closed Defence-Berger Variation-Chigorin Defence |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Re1 b5 7 Bb3 d6 8 c3 0-0 9 h3 Na5 10 Bc2 c5 11 d4 Qc7 12 Nbd2 cxd4 13 cxd4 | C88/C99 | Ruy Lopez-Berger Variation-Chigorin Defence-Panov System |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Re1 b5 7 Bb3 d6 8 c3 0-0 9 h3 Na5 10 Bc2 c5 11 d4 Qc7 12 Nbd2 Nc6 | C88/C98 | Ruy Lopez-Berger Variation-Rossolimo Variation-Rauzer Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Re1 b5 7 Bb3 d6 8 c3 0-0 9 h3 Nb8 | C88/C94 | Ruy Lopez-Columbus Variation-Closed Defence-Breyer Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Re1 b5 7 Bb3 d6 8 c3 0-0 9 h3 Nb8 10 d3 | C88/C94 | Ruy Lopez-Closed Defence-Breyer Variation-Quiet Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Re1 b5 7 Bb3 d6 8 c3 0-0 9 h3 Nb8 10 d4 | C88/C95 | Ruy Lopez-Columbus Variation-Closed Defence-Breyer Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Re1 b5 7 Bb3 d6 8 c3 0-0 9 h3 Nb8 10 d4 Nbd7 | C88/C95 | Ruy Lopez-Closed Defence-Breyer Variation-Borisenko Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Re1 b5 7 Bb3 d6 8 c3 0-0 9 h3 Nb8 10 d4 Nbd7 11 Nbd2 Bb7 12 Bc2 c5 | C88/C95 | Ruy Lopez-Breyer Variation-Borisenko Variation-Gligoric Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Re1 b5 7 Bb3 d6 8 c3 0-0 9 h3 Nb8 10 d4 Nbd7 11 Nh4 | C88/C95 | Ruy Lopez-Breyer Variation-Borisenko Variation-Simagin Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Re1 b5 7 Bb3 d6 8 c3 0-0 9 h3 Nd7 | C88/C92 | Ruy Lopez-Columbus Variation-Closed Defence-Ragozin Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Re1 b5 7 Bb3 d6 8 c3 0-0 9 h3 Qd7 | C88/C92 | Ruy Lopez-Columbus Variation-Closed Defence-Zaitsev Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Re1 b5 7 Bb3 d6 8 c3 Na5 9 Bc2 c5 | C88/C90 | Ruy Lopez-Columbus Variation-Closed Defence-Chigorin Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Re1 b5 7 Bb3 d6 8 c3 Na5 9 Bc2 c5 10 d4 Qc7 11 a4 | C88 | Ruy Lopez-Closed Defence-Chigorin Variation-Balla Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Re1 b5 7 Bb3 d6 8 c3 Na5 9 Bc2 c5 10 d4 Qc7 11 h3 Nc6 12 d5 Nb8 13 Nbd2 g5 | C88 | Ruy Lopez-Closed Defence-Chigorin Variation-Leonhardt Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Re1 b5 7 Bb3 d6 8 c3 Na5 9 Bc2 c5 10 d4 Qc7 11 h3 Nc6 12 d5 Nd8 13 Nbd2 g5 | C88/C90 | Ruy Lopez-Closed Defence-Chigorin Variation-Leonhardt Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Re1 b5 7 Bb3 d6 8 c3 Na5 9 Bc2 c5 10 d4 Qc7 11 Nbd2 0-0 12 Nf1 Bg4 13 Ne3 Bxf3 14 Qxf3 | C90 | Ruy Lopez-Closed Defence-Chigorin Variation-Alekhine Gambit |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Re1 b5 7 Bb3 d6 8 d4 | C88 | Ruy Lopez-Columbus Variation-Closed Defence-Rosen Attack |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Re1 b5 7 Bb3 d6 8 d4 Nxd4 9 Nxd4 exd4 10 Qxd4 c5 | C88/C90 | Ruy Lopez-Closed Defence-Rosen Attack-Noah's Ark Trap |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Re1 d6 | C87 | Ruy Lopez-Columbus Variation-Closed Defence-Averbakh Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Re1 d6 7 c3 0-0 8 d4 Bd7 9 Nbd2 Be8 | C87 | Ruy Lopez-Closed Defence-Averbakh Variation-Kecskemet Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Be7 6 Re1 d6 7 c3 Bd7 8 d4 0-0 9 Nbd2 Be8 | C87 | Ruy Lopez-Closed Defence-Averbakh Variation-Kecskemét Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 d5 | C79 | Ruy Lopez-Morphy Defence-Columbus Variation-Central Countergambit |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 d6 | C79 | Ruy Lopez-Morphy Defence-Columbus Variation-Steinitz Defence Deferred/Russian Defence |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 d6 6 Bxc6+ bxc6 7 d4 Bg4 | C79 | Ruy Lopez-Columbus Variation-Steinitz Defence Deferred-Lipnitsky Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 d6 6 Bxc6+ bxc6 7 d4 Nxe4 | C79 | Ruy Lopez-Columbus Variation-Steinitz Defence Deferred-Rubinstein Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 d6 6 Bxc6+ bxc6 7 d4 Nxe4 8 Re1 f5 9 dxe5 d5 10 Nc3 | C79 | Ruy Lopez-Steinitz Defence Deferred-Rubinstein Variation-Boleslavsky Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 g6 | C79 | Ruy Lopez-Morphy Defence-Columbus Variation-Brix Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Nxe4 | C80 Explore | Ruy Lopez-Morphy Defence-Columbus Variation-Open/Tarrasch Defence |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Nxe4 6 d4 b5 7 Bb3 d5 8 a4 Nxd4 | C80 | Ruy Lopez-Columbus Variation-Open Defence-Schlechter Defence |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Nxe4 6 d4 b5 7 Bb3 d5 8 a4 Nxd4 9 Nxd4 exd4 10 Nc3 | C80 | Ruy Lopez-Open Defence-Schlechter Defence-Schlechter-Berger Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Nxe4 6 d4 b5 7 Bb3 d5 8 c4 | C80 | Ruy Lopez-Columbus Variation-Open Defence-Harksen Gambit |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Nxe4 6 d4 b5 7 Bb3 d5 8 dxe5 Be6 | C80 | Ruy Lopez-Columbus Variation-Open Defence-Main Line |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Nxe4 6 d4 b5 7 Bb3 d5 8 dxe5 Be6 9 c3 | C82 | Ruy Lopez-Columbus Variation-Open Defence-Main Line |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Nxe4 6 d4 b5 7 Bb3 d5 8 dxe5 Be6 9 c3 Bc5 | C82 | Ruy Lopez-Open Defence-Main Line-Italian Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Nxe4 6 d4 b5 7 Bb3 d5 8 dxe5 Be6 9 c3 Bc5 10 Nbd2 | C82 | Ruy Lopez-Open Defence-Italian Variation-St. Petersburg Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Nxe4 6 d4 b5 7 Bb3 d5 8 dxe5 Be6 9 c3 Bc5 10 Nbd2 0-0 11 Bc2 Nxf2 | C82 | Ruy Lopez-Open Defence-St. Petersburg Variation-Dilworth Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Nxe4 6 d4 b5 7 Bb3 d5 8 dxe5 Be6 9 c3 Bc5 10 Qd3 | C82 | Ruy Lopez-Open Defence-Italian Variation-Motzko Attack II |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Nxe4 6 d4 b5 7 Bb3 d5 8 dxe5 Be6 9 c3 Bc5 10 Qd3 Ne7 | C82 | Ruy Lopez-Open Defence-Motzko Attack-Nenarokov Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Nxe4 6 d4 b5 7 Bb3 d5 8 dxe5 Be6 9 c3 Be7 | C83 | Ruy Lopez-Open Defence-Main Line-Classical Defence |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Nxe4 6 d4 b5 7 Bb3 d5 8 dxe5 Be6 9 c3 Be7 10 a4 b4 11 Nd4 | C83 | Ruy Lopez-Open Defence-Classical Defence-Alekhine Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Nxe4 6 d4 b5 7 Bb3 d5 8 dxe5 Be6 9 c3 Be7 10 Nbd2 | C83 | Ruy Lopez-Open Defence-Classical Defence-St. Petersburg Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Nxe4 6 d4 b5 7 Bb3 d5 8 dxe5 Be6 9 c3 Be7 10 Nbd2 0-0 11 Qe2 | C83 | Ruy Lopez-Classical Defence-St. Petersburg Variation-Malkin Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Nxe4 6 d4 b5 7 Bb3 d5 8 dxe5 Be6 9 c3 Be7 10 Re1 0-0 11 Nd4 Nxe5 | C83 | Ruy Lopez-Open Defence-Classical Defence-Breslau Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Nxe4 6 d4 b5 7 Bb3 d5 8 dxe5 Be6 9 c3 Be7 10 Re1 0-0 11 Nd4 Qd7 12 Nxe6 fxe6 13 Rxe4 | C83 | Ruy Lopez-Open Defence-Classical Defence-Tarrasch Trap |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Nxe4 6 d4 b5 7 Bb3 d5 8 dxe5 Be6 9 c3 Nc5 | C82 | Ruy Lopez-Open Defence-Main Line-Berlin Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Nxe4 6 d4 b5 7 Bb3 d5 8 dxe5 Be6 9 Nbd2 | C80 | Ruy Lopez-Open Defence-Main Line-Bernstein Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Nxe4 6 d4 b5 7 Bb3 d5 8 dxe5 Be6 9 Nbd2 Bc5 10 Qe1 | C80 | Ruy Lopez-Open Defence-Main Line-Bernstein Variation-Luther Line |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Nxe4 6 d4 b5 7 Bb3 d5 8 dxe5 Be6 9 Nbd2 Nc5 10 c3 d4 11 Ng5 | C80 | Ruy Lopez-Open Defence-Bernstein Variation-Karpov Gambit |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Nxe4 6 d4 b5 7 Bb3 d5 8 dxe5 Be6 9 Qe2 | C81 | Ruy Lopez-Open Defence-Main Line-Howell Attack |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Nxe4 6 d4 b5 7 Bb3 d5 8 dxe5 Be6 9 Qe2 Be7 10 c4 | C81 | Ruy Lopez-Open Defence-Howell Attack-Adam Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Nxe4 6 d4 b5 7 Bb3 d5 8 dxe5 Be6 9 Qe2 Be7 10 Rd1 0-0 11 c4 bxc4 12 Bxc4 Qd7 | C81 | Ruy Lopez-Open Defence-Howell Attack-Ekström Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Nxe4 6 d4 b5 7 Bb3 d5 8 dxe5 Ne7 | C80 | Ruy Lopez-Columbus Variation-Open Defence-Zukertort Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Nxe4 6 d4 b5 7 d5 | C80 | Ruy Lopez-Columbus Variation-Open Defence-Richter Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Nxe4 6 d4 b5 7 Nxe5 | C80 | Ruy Lopez-Columbus Variation-Open Defence-Friess Attack |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Nxe4 6 d4 exd4 | C80 | Ruy Lopez-Columbus Variation-Open Defence-Riga Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Nxe4 6 d4 exd4 7 Re1 d5 8 Bg5 | C80 | Ruy Lopez-Open Defence-Riga Variation-Riga-Berger Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Nxe4 6 Nc3 | C80 | Ruy Lopez-Columbus Variation-Open Defence-Knorre Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Nxe4 6 Qe2 | C80 | Ruy Lopez-Columbus Variation-Open Defence-Tartakower Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 0-0 Nxe4 6 Re1 d5 | C80 | Ruy Lopez-Columbus Variation-Open Defence-Skipworth Gambit |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 Bxc6 | C77 | Ruy Lopez-Morphy Defence-Columbus Variation-Treybal/Bayreuth Variation/Exchange Variation Deferred |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 c3 | C77 | Ruy Lopez-Morphy Defence-Columbus Variation-Jaffe Gambit |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 d3 | C77 | Ruy Lopez-Morphy Defence-Columbus Variation-Anderssen Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 d3 d6 6 c4 | C77 | Ruy Lopez-Columbus Variation-Anderssen Variation-Duras Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 d4 | C77 | Ruy Lopez-Morphy Defence-Columbus Variation-Mackenzie Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 Nc3 | C77 | Ruy Lopez-Morphy Defence-Columbus Variation-4 Knights/Tarrasch Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 Nc3 Bc5 6 Nxe5 Nxe5 7 d4 Bd6 8 0-0 | C77 | Ruy Lopez-Columbus Variation-Tarrasch Variation-Berger Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 Qe2 | C77 | Ruy Lopez-Morphy Defence-Columbus Variation-Wormald/Alapin Attack |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 Qe2 b5 6 Bb3 Be7 7 c3 d6 8 d4 Bg4 | C77 | Ruy Lopez-Columbus Variation-Wormald Attack-Grünfeld Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nf6 5 Qe2 b5 6 Bb3 Be7 7 d4 d6 8 c3 Bg4 | C77 | Ruy Lopez-Columbus Variation-Wormald Attack-Gruenfeld Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Ba4 Nge7 | C70 | Ruy Lopez-Morphy Defence-Columbus Variation-Cozio Defence Deferred |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Bxc6 | C68 | King's Knight Opening-Ruy Lopez-Morphy Defence-Exchange Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Bxc6 bxc6 | C68 | Ruy Lopez-Morphy Defence-Exchange Variation-Lutikov Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Bxc6 bxc6 5 Nc3 | C68 | Ruy Lopez-Exchange Variation-Lutikov Variation-Keres Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Bxc6 dxc6 5 0-0 | C69 | Ruy Lopez-Morphy Defence-Exchange Variation-Normal Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Bxc6 dxc6 5 0-0 Bd6 | C68/C69 | Ruy Lopez-Exchange Variation-Normal Variation-King's Bishop/Classical Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Bxc6 dxc6 5 0-0 Bg4 6 h3 h5 | C68/C69 | Ruy Lopez-Exchange Variation-Normal Variation-Alapin Gambit |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Bxc6 dxc6 5 0-0 f6 | C69 | Ruy Lopez-Exchange Variation-Normal Variation-Gligoric Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Bxc6 dxc6 5 0-0 Qd6 | C68/C69 | Ruy Lopez-Exchange Variation-Normal Variation-Bronstein Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Bxc6 dxc6 5 d4 Bg4 | C68 | Ruy Lopez-Morphy Defence-Exchange Variation-Alapin Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Bxc6 dxc6 5 d4 exd4 6 Qxd4 Qxd4 (7 Nxd4 Bd6 or ... Bd7) | C68 | Ruy Lopez-Morphy Defence-Exchange Variation-Alekhine Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Bxc6 dxc6 5 Nc3 | C68 | Ruy Lopez-Morphy Defence-Exchange Variation-Keres Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 a6 4 Bxc6 dxc6 5 Nc3 f6 6 d3 | C68 | Ruy Lopez-Exchange Variation-Keres Variation-Romanovsky Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 b6 | C60 Explore | King's Pawn-King's Knight Opening-Ruy Lopez-Rotary-Albany Gambit |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 Bb4 | C60 Explore | King's Pawn-King's Knight Opening-Ruy Lopez-Alapin's Defence |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 Bb4 4 c3 Ba5 5 Bxc6 dxc6 | C60 | King's Knight Opening-Ruy Lopez-Alapin's Defence-Alapin Gambit |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 Bc5 | C64 Explore | King's Pawn-King's Knight Opening-Ruy Lopez-Cordel/Classical Defence |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 Bc5 4 0-0 Nd4 5 b4 | C64 | King's Knight Opening-Ruy Lopez-Cordel Defence-Zaitsev Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 Bc5 4 0-0 Nf6 5 c3 | C64 | King's Knight Opening-Ruy Lopez-Cordel Defence-Zukertort Gambit |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 Bc5 4 0-0 Nf6 5 c3 0-0 6 d4 Bb6 7 Bg5 | C64 | Ruy Lopez-Cordel Defence-Zukertort Gambit-Modern Main Line |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 Bc5 4 b4 | C64 | King's Knight Opening-Ruy Lopez-Cordel Defence-Spanish Wing Gambit |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 Bc5 4 c3 | C64 | King's Knight Opening-Ruy Lopez-Cordel Defence-Central/Classical Defence |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 Bc5 4 c3 Bb6 | C64 | Ruy Lopez-Cordel Defence-Central Defence-Charousek Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 Bc5 4 c3 d5 | C64 | Ruy Lopez-Cordel Defence-Central Defence-Konikowski-Hardy Gambit |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 Bc5 4 c3 f5 | C64 | Ruy Lopez-Cordel Defence-Central Defence-Cordel Gambit |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 Bc5 4 c3 Nf6 5 0-0 0-0 6 d4 Bb6 | C64 | Ruy Lopez-Cordel Defence-Central Defence-Benelux Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 Bc5 4 c3 Qe7 | C64 | Ruy Lopez-Cordel Defence-Central Defence-Boden Defence |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 Be7 | C60 Explore | King's Knight Opening-Ruy Lopez-Lucena Defence |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 d5 | C60 Explore | King's Pawn-King's Knight Opening-Ruy Lopez-Spanish Countergambit |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 d5 4 Nxe5 Qg5 5 0-0 | C60 | Ruy Lopez-Spanish Countergambit-Harding Countergambit-Fricke Gambit |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 d5 4 Nxe5 Qg5 5 Nxc6 | C60 | King's Knight Opening-Ruy Lopez-Spanish Countergambit-Harding Gambit |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 d6 | C62 Explore | King's Pawn-King's Knight Opening-Ruy Lopez-Old Steinitz Defence |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 d6 4 Bxc6+ bxc6 5 d4 f6 | C62 | King's Knight Opening-Ruy Lopez-Old Steinitz Defence-Lipschütz Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 d6 4 d4 Bd7 5 c4 | C62 | King's Knight Opening-Ruy Lopez-Old Steinitz Defence-Semi-Duras Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 d6 4 d4 Bd7 5 Nc3 Nf6 6 Bxc6 | C62 | King's Knight Opening-Ruy Lopez-Old Steinitz Defence-Nimzowitsch Attack |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 d6 4 d4 exd4 5 0-0 | C62 | King's Knight Opening-Ruy Lopez-Old Steinitz Defence-Centre Gambit |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 f5 | C63 Explore | King's Pawn-King's Knight Opening-Ruy Lopez-Schliemann Defence |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 f5 4 Bxc6 | C63 | King's Knight Opening-Ruy Lopez-Schliemann Defence-Exchange Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 f5 4 d4 | C63 | King's Knight Opening-Ruy Lopez-Schliemann Defence-Schönemann Attack |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 f5 4 exf5 | C63 | King's Knight Opening-Ruy Lopez-Schliemann Defence-Jaenisch Gambit Accepted |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 f5 4 Nc3 | C63 | King's Knight Opening-Ruy Lopez-Schliemann Defence-Berger/Dyckhoff Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 f5 4 Nc3 fxe4 5 Nxe4 Be7 | C63 | Ruy Lopez-Schliemann Defence-Berger Variation-Kostic Defence |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 f5 4 Nc3 fxe4 5 Nxe4 d5 6 Nxe5 dxe4 7 Nxc6 Qd5 | C63 | Ruy Lopez-Schliemann Defence-Berger Variation-Möhring Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 f5 4 Nc3 fxe4 5 Nxe4 d5 6 Nxe5 dxe4 7 Nxc6 Qg5 | C63 | Ruy Lopez-Schliemann Defence-Berger Variation-Classical Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 f5 4 Nc3 fxe4 5 Nxe4 Nf6 | C63 | Ruy Lopez-Schliemann Defence-Berger Variation-Tartakower Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 f5 4 Nc3 Nf6 5 exf5 e4 6 Nh4 | C63 | Ruy Lopez-Schliemann Defence-Berger Variation-Lasker Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 f6 | C60 Explore | King's Knight Opening-Ruy Lopez-Nuremberg/Nürnberg Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 g5 | C60 Explore | King's Knight Opening-Ruy Lopez-Brentano Gambit |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 g6 | C60 Explore | King's Knight Opening-Ruy Lopez-Barnes/Fianchetto/Smyslov Defence |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 g6 4 c3 f5 | C60 | King's Knight Opening-Ruy Lopez-Barnes Defence-Kevitz Gambit |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 Na5 | C60 Explore | King's Knight Opening-Ruy Lopez-Pollock Defence |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 Nb8 | C60 Explore | Ruy Lopez-Retreat Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 Nd4 | C61 Explore | King's Pawn-King's Knight Opening-Ruy Lopez-Bird Defence |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 Nd4 4 Nxd4 exd4 5 0-0 Ne7 | C61 | King's Knight Opening-Ruy Lopez-Bird Defence-Paulsen Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 Nd4 4 Nxd4 exd4 5 d3 c6 6 Bc4 Nf6 7 Bg5 | C61 | King's Knight Opening-Ruy Lopez-Bird Defence-Berger Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 Nf6 | C65 Explore | King's Pawn-King's Knight Opening-Ruy Lopez-Berlin Defence |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 Nf6 4 0-0 Bc5 | C65 | King's Knight Opening-Ruy Lopez-Berlin Defence-Beverwijk Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 Nf6 4 0-0 Bc5 5 c3 0-0 6 d4 Bb6 | C65 | Ruy Lopez-Berlin Defence-Beverwijk Variation-Benelux Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 Nf6 4 0-0 d6 | C66 | King's Knight Opening-Ruy Lopez-Berlin Defence-Improved Steinitz/Closed Berlin Defence |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 Nf6 4 0-0 d6 5 d4 Bd7 6 Nc3 Be7 | C66 | Ruy Lopez-Berlin Defence-Improved Steinitz Defence-Hedgehog Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 Nf6 4 0-0 d6 5 d4 Bd7 6 Nc3 Be7 7 Bg5 | C66 | Ruy Lopez-Improved Steinitz Defence-Hedgehog Variation-Closed Bernstein Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 Nf6 4 0-0 d6 5 d4 Bd7 6 Nc3 Be7 7 Bxc6 | C66 | Ruy Lopez-Improved Steinitz Defence-Hedgehog Variation-Showalter Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 Nf6 4 0-0 d6 5 d4 Bd7 6 Nc3 Be7 7 Re1 0-0 | C66 | Ruy Lopez-Improved Steinitz Defence-Hedgehog Variation-Tarrasch Trap |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 Nf6 4 0-0 d6 5 d4 Bd7 6 Nc3 exd4 | C66 | Ruy Lopez-Berlin Defence-Improved Steinitz Defence-Closed Wolf Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 Nf6 4 0-0 d6 5 d4 Nd7 | C66 | Ruy Lopez-Berlin Defence-Improved Steinitz Defence-Chigorin Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 Nf6 4 0-0 Ng4 | C65 | King's Knight Opening-Ruy Lopez-Berlin Defence-Fishing Pole Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 Nf6 4 0-0 Nxe4 | C67 | King's Knight Opening-Ruy Lopez-Berlin Defence-Open Variation/Rio Gambit Accepted |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 Nf6 4 0-0 Nxe4 5 d4 a6 | C67 | Ruy Lopez-Berlin Defence-Rio Gambit Accepted-Rosenthal Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 Nf6 4 0-0 Nxe4 5 d4 Be7 6 dxe5 | C67 | Ruy Lopez-Berlin Defence-Rio Gambit Accepted-Minckwitz Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 Nf6 4 0-0 Nxe4 5 d4 Be7 6 Qe2 d5 | C67 | Ruy Lopez-Berlin Defence-Rio Gambit Accepted-Trifunovic Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 Nf6 4 0-0 Nxe4 5 d4 Be7 6 Qe2 Nd6 7 Bxc6 bxc6 8 dxe5 Nb7 9 b3 | C67 | Ruy Lopez-Berlin Defence-Rio Gambit Accepted-Pillsbury/Fianchetto Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 Nf6 4 0-0 Nxe4 5 d4 Be7 6 Qe2 Nd6 7 Bxc6 bxc6 8 dxe5 Nb7 9 c4 | C67 | Ruy Lopez-Berlin Defence-Rio Gambit Accepted-Zukertort Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 Nf6 4 0-0 Nxe4 5 d4 Be7 6 Qe2 Nd6 7 Bxc6 bxc6 8 dxe5 Nb7 9 Nc3 0-0 10 Re1 | C67 | Ruy Lopez-Berlin Defence-Rio Gambit Accepted-Pillsbury Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 Nf6 4 0-0 Nxe4 5 d4 Be7 (6 Qe2 Nd6 7 Bxc6 bxc6 8 dxe5 Nb7 9 Nc3 0-0 10 Re1 Nc5 11 Nd4 Ne6 12 Be3 Nxd4 13 Bxd4 c5) | C67 | Ruy Lopez-Berlin Defence-Rio Gambit Accepted-Rio de Janeiro Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 Nf6 4 0-0 Nxe4 5 d4 Be7 6 Qe2 Nd6 7 Bxc6 bxc6 8 dxe5 Nb7 9 Nc3 0-0 10 Re1 Re8 11 Qc4 | C67 | Ruy Lopez-Rio Gambit Accepted-Pillsbury Variation-Alapin Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 Nf6 4 0-0 Nxe4 5 d4 Be7 6 Qe2 Nd6 7 Bxc6 bxc6 8 dxe5 Nb7 9 Nd4 | C67 | Ruy Lopez-Berlin Defence-Rio Gambit Accepted-Winawer Attack |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 Nf6 4 0-0 Nxe4 5 d4 Be7 6 Qe2 Nd6 7 Bxc6 bxc6 8 dxe5 Nf5 | C67 | Ruy Lopez-Berlin Defence-Rio Gambit Accepted-Cordel Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 Nf6 4 0-0 Nxe4 5 d4 Nd6 6 Ba4 | C67 | Ruy Lopez-Berlin Defence-Rio Gambit Accepted-Showalter Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 Nf6 4 0-0 Nxe4 5 d4 Nd6 6 Bxc6 dxc6 7 dxe5 Ne4 | C67 | Ruy Lopez-Rio Gambit Accepted-l'Hermet Variation-Westerinen Line |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 Nf6 4 0-0 Nxe4 5 d4 Nd6 6 Bxc6 dxc6 7 dxe5 Nf5 8 Qxd8+ Kxd8 | C67 | Ruy Lopez-Rio Gambit Accepted-l'Hermet Variation-Berlin Wall Defence |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 Nf6 4 0-0 Nxe4 5 d4 Nd6 6 Bxc6 dxc6 7 dxe5 Nf5 8 Qxd8+ Kxd8 9 Nc3 Bd7 | C67 | Ruy Lopez-l'Hermet Variation-Berlin Wall Defence-J. Rogers Line |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 Nf6 4 0-0 Nxe4 5 d4 Nd6 (6 dxe5) | C67 | Ruy Lopez-Berlin Defence-Rio Gambit Accepted-l'Hermet Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 Nf6 4 d3 Bc5 5 Be3 | C65 | King's Knight Opening-Ruy Lopez-Berlin Defence-Kaufmann Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 Nf6 4 d3 d6 5 Bxc6+ | C65 | King's Knight Opening-Ruy Lopez-Berlin Defence-Anderssen Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 Nf6 4 d3 d6 5 c4 | C65 | King's Knight Opening-Ruy Lopez-Berlin Defence-Duras Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 Nf6 4 d3 Ne7 | C65 | King's Knight Opening-Ruy Lopez-Berlin Defence-Mortimer Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 Nf6 4 d3 Ne7 5 Nxe5 c6 | C65 | Ruy Lopez-Berlin Defence-Mortimer Variation-Mortimer Trap |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 Nf6 4 d4 exd4 5 0-0 | C65 | King's Knight Opening-Ruy Lopez-Berlin Defence-Nyholm Attack |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 Nf6 4 Nc3 Bb4 | C65 | King's Knight Opening-Ruy Lopez-Berlin Defence-Double Ruy Lopez |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 Nf6 4 Nxe5 | C65 | King's Knight Opening-Ruy Lopez-Berlin Defence-Halloween Attack |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 Nge7 | C60 Explore | Ruy Lopez-Cozio Defence |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 Nge7 4 d4 exd4 5 Nxd4 g6 6 Nc3 Bg7 7 Be3 0-0 8 Qd2 d5 | C60 | Ruy Lopez-Cozio Defence-Tartakower Gambit |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 Nge7 4 Nc3 g6 | C60 | King's Knight Opening-Ruy Lopez-Cozio Defence-Paulsen Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 Qe7 | C60 Explore | King's Knight Opening-Ruy Lopez-Vinogradov Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bb5 Qf6 | C60 Explore | King's Pawn-King's Knight Opening-Ruy Lopez-Frankfurt Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 | C50 Explore | King's Pawn-King's Knight Opening-Italian Game |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 | C50 | King's Pawn-King's Knight Opening-Italian Game-Italian Variation/Giuoco Piano |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 0-0 Nf6 5 d4 | C55 | King's Knight Opening-Italian Game-Giuoco Piano-Deutz Gambit |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 b4 | C51 | King's Pawn-King's Knight Opening-Giuoco Piano-Evans Gambit |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 b4 b5 | C51 | King's Knight Opening-Giuoco Piano-Evans Gambit-Fontaine Countergambit |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 b4 Bb6 | C51 | King's Pawn-King's Knight Opening-Giuoco Piano-Evans Gambit Declined |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 b4 Bb6 5 a4 a6 6 Nc3 | C51 | King's Knight Opening-Giuoco Piano-Evans Gambit Declined-Showalter Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 b4 Bb6 5 b5 Na5 6 Nxe5 Nh6 | C51 | King's Knight Opening-Giuoco Piano-Evans Gambit Declined-Lange Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 b4 Bb6 5 b5 Na5 6 Nxe5 Nh6 7 d4 d6 8 Bxh6 dxe5 9 Bxg7 Rg8 10 Bxf7+ Kxf7 11 Bxe5 Qg5 12 Nd2 | C51 | Giuoco Piano-Evans Gambit Declined-Lange Variation-Pavlov Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 b4 Bb6 5 b5 Na5 6 Nxe5 Qg5 | C51 | King's Knight Opening-Giuoco Piano-Evans Gambit Declined-Hirschbach Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 b4 Bb6 5 b5 Na5 6 Nxe5 Qg5 7 Bxf7+ Ke7 8 Qh5 | C51 | Giuoco Piano-Evans Gambit Declined-Hirschbach Variation-Vásquez Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 b4 Bb6 5 b5 Na5 6 Nxe5 Qg5 7 Qf3 Qxe5 8 Qxf7+ Kd8 9 Bb2 | C51 | Giuoco Piano-Evans Gambit Declined-Hirschbach Variation-Hicken Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 b4 Bb6 5 Bb2 | C51 | King's Knight Opening-Giuoco Piano-Evans Gambit Declined-Cordel Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 b4 Bxb4 | C51 | King's Pawn-King's Knight Opening-Giuoco Piano-Evans Gambit Accepted |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 b4 Bxb4 5 0-0 d6 6 d4 Bd7 7 Bb2 | C51 | King's Knight Opening-Giuoco Piano-Evans Gambit Accepted-Tartakower Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 b4 Bxb4 5 c3 Ba5 | C52 | King's Knight Opening-Giuoco Piano-Evans Gambit Accepted-Normal/Main Line |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 b4 Bxb4 5 c3 Ba5 6 0-0 | C52 | Giuoco Piano-Evans Gambit Accepted-Main Line-Slow Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 b4 Bxb4 5 c3 Ba5 6 0-0 d6 7 d4 Bb6 | C52 | Giuoco Piano-Evans Gambit Accepted-Main Line-Lasker Defence |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 b4 Bxb4 5 c3 Ba5 6 0-0 d6 7 d4 Bd7 | C52 | Giuoco Piano-Evans Gambit Accepted-Main Line-Sanders-Alapin Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 b4 Bxb4 5 c3 Ba5 6 0-0 d6 7 d4 Bg4 | C52 | Giuoco Piano-Evans Gambit Accepted-Main Line-Alapin-Steinitz Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 b4 Bxb4 5 c3 Ba5 6 0-0 d6 7 d4 exd4 8 Qb3 | C52 | Giuoco Piano-Evans Gambit Accepted-Main Line-Waller Attack |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 b4 Bxb4 5 c3 Ba5 6 0-0 Nf6 7 d4 0-0 8 Nxe5 | C52 | Giuoco Piano-Evans Gambit Accepted-Main Line-Richardson Attack |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 b4 Bxb4 5 c3 Ba5 6 0-0 Qf6 | C52 | Evans Gambit Accepted-Main Line-Slow Variation-Steinitz Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 b4 Bxb4 5 c3 Ba5 6 d4 b5 | C52 | Giuoco Piano-Evans Gambit Accepted-Main Line-Leonhardt Countergambit |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 b4 Bxb4 5 c3 Ba5 6 d4 d6 | C52 | Giuoco Piano-Evans Gambit Accepted-Main Line-Bronstein/Alapin Defence |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 b4 Bxb4 5 c3 Ba5 6 d4 d6 7 Bg5 | C52 | Evans Gambit Accepted-Main Line-Bronstein Defence-Sokolsky Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 b4 Bxb4 5 c3 Ba5 6 d4 d6 7 Qb3 | C52 | Evans Gambit Accepted-Main Line-Bronstein Defence-Tartakower Attack |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 b4 Bxb4 5 c3 Ba5 6 d4 d6 7 Qb3 Qd7 8 dxe5 dxe5 9 0-0 Bb6 10 Ba3 Na5 11 Nxe5 | C52 | Evans Gambit Accepted-Bronstein Defence-Tartakower Attack-Levenfish Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 b4 Bxb4 5 c3 Ba5 6 d4 exd4 | C52 | Giuoco Piano-Evans Gambit Accepted-Main Line-Pierce Defence |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 b4 Bxb4 5 c3 Ba5 6 d4 exd4 7 0-0 b5 | C52 | Evans Gambit Accepted-Main Line-Pierce Defence-Johner Defence |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 b4 Bxb4 5 c3 Ba5 6 d4 exd4 7 0-0 d3 | C52 | Evans Gambit Accepted-Main Line-Pierce Defence-Dufresne Defence |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 b4 Bxb4 5 c3 Ba5 6 d4 exd4 7 0-0 d6 (8 Qb3) | C52 | Evans Gambit Accepted-Main Line-Pierce Defence-Waller Attack (transposed) |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 b4 Bxb4 5 c3 Ba5 6 d4 exd4 7 0-0 dxc3 | C52 | Evans Gambit Accepted-Main Line-Pierce Defence-Compromised Defence |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 b4 Bxb4 5 c3 Ba5 6 d4 exd4 7 0-0 dxc3 8 Qb3 Qf6 9 e5 Qg6 10 Nxc3 Nge7 11 Ba3 | C52 | Evans Gambit Accepted-Pierce Defence-Compromised Defence-Paulsen/Main Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 b4 Bxb4 5 c3 Ba5 6 d4 exd4 7 0-0 dxc3 8 Qb3 Qf6 9 e5 Qg6 10 Nxc3 Nge7 11 Rd1 | C52 | Evans Gambit Accepted-Pierce Defence-Compromised Defence-Potter Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 b4 Bxb4 5 c3 Ba5 6 d4 exd4 7 0-0 Nf6 | C52 | Evans Gambit Accepted-Main Line-Pierce Defence-Anderssen Defence |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 b4 Bxb4 5 c3 Ba5 6 d4 exd4 7 0-0 Nge7 | C52 | Evans Gambit Accepted-Main Line-Pierce Defence-Mieses Defence |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 b4 Bxb4 5 c3 Ba5 6 d4 Nf6 | C52 | Giuoco Piano-Evans Gambit Accepted-Main Line-Laroche Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 b4 Bxb4 5 c3 Ba5 6 d4 Nxd4 | C52 | Giuoco Piano-Evans Gambit Accepted-Main Line-Pierce Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 b4 Bxb4 5 c3 Bc5 | C51 | King's Knight Opening-Giuoco Piano-Evans Gambit Accepted-MacDonnell Defence |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 b4 Bxb4 5 c3 Bc5 6 0-0 d6 7 d4 exd4 8 cxd4 Bb6 | C51 | King's Knight Opening-Evans Gambit Accepted-MacDonnell Defence-Normal Position |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 b4 Bxb4 5 c3 Bc5 6 0-0 d6 7 d4 exd4 8 cxd4 Bb6 9 Nc3 Bg4 10 Qa4 | C51 | Evans Gambit Accepted-MacDonnell Defence-Normal Position-Fraser Attack |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 b4 Bxb4 5 c3 Bc5 6 d4 exd4 7 0-0 d6 8 cxd4 Bb6 | C51 | Giuoco Piano-Evans Gambit Accepted-MacDonnell Defence-Normal/Main Line |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 b4 Bxb4 5 c3 Bc5 6 d4 exd4 7 0-0 d6 8 cxd4 Bb6 9 d5 Na5 10 Bb2 | C51 | Evans Gambit Accepted-MacDonnell Defence-Main Line-Ulvestad Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 b4 Bxb4 5 c3 Bc5 6 d4 exd4 7 0-0 d6 8 cxd4 Bb6 9 d5 Na5 10 Bb2 Ne7 | C51 | Evans Gambit Accepted-Main Line-Ulvestad Variation-Paulsen Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 b4 Bxb4 5 c3 Bc5 6 d4 exd4 7 0-0 d6 8 cxd4 Bb6 9 Nc3 | C51 | Evans Gambit Accepted-MacDonnell Defence-Main Line-Morphy Attack |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 b4 Bxb4 5 c3 Bc5 6 d4 exd4 7 0-0 d6 8 cxd4 Bb6 9 Nc3 Bg4 10 Qa4 | C51 | Evans Gambit Accepted-Main Line-Morphy Attack-Fraser Attack |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 b4 Bxb4 5 c3 Bc5 6 d4 exd4 7 0-0 d6 8 cxd4 Bb6 9 Nc3 Bg4 10 Qa4 Bd7 11 Qb3 Na5 12 Bxf7+ Kf8 13 Qc2 | C51 | Evans Gambit Accepted-Main Line-Morphy Attack-Fraser-Mortimer Attack |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 b4 Bxb4 5 c3 Bc5 6 d4 exd4 7 0-0 d6 8 cxd4 Bb6 9 Nc3 Bg4 10 Qa4 Bd7 11 Qb3 Na5 12 Bxf7+ Kf8 13 Qc2 Kxf7 | C51 | Evans Gambit Accepted-Morphy Attack-Fraser-Mortimer Attack-Mortimer-Evans Gambit |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 b4 Bxb4 5 c3 Bc5 6 d4 exd4 7 0-0 d6 8 cxd4 Bb6 9 Nc3 Na5 10 Bg5 | C51 | Evans Gambit Accepted-Main Line-Morphy Attack-Göring Attack |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 b4 Bxb4 5 c3 Bc5 6 d4 exd4 7 0-0 d6 8 cxd4 Bb6 9 Nc3 Na5 10 Bg5 f6 11 Be3 | C51 | Evans Gambit Accepted-Morphy Attack-Göring Attack-Steinitz Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 b4 Bxb4 5 c3 Bc5 6 d4 exd4 7 cxd4 Bb4+ 8 Bd2 | C51 | Giuoco Piano-Evans Gambit Accepted-MacDonnell Defence-Harding Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 b4 Bxb4 5 c3 Bc5 6 d4 exd4 7 cxd4 Bb4+ 8 Kf1 | C51 | Giuoco Piano-Evans Gambit Accepted-MacDonnell Defence-Jaenisch Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 b4 Bxb4 5 c3 Bd6 | C51 | King's Knight Opening-Giuoco Piano-Evans Gambit Accepted-Stone-Ware Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 b4 Bxb4 5 c3 Be7 | C51 | King's Knight Opening-Giuoco Piano-Evans Gambit Accepted-Anderssen Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 b4 Bxb4 5 c3 Be7 6 d4 Na5 | C51 | Giuoco Piano-Evans Gambit Accepted-Anderssen Variation-Cordel Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 b4 Bxb4 5 c3 Bf8 | C51 | King's Knight Opening-Giuoco Piano-Evans Gambit Accepted-Mayet Defence |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 b4 d5 | C51 | King's Knight Opening-Giuoco Piano-Evans Gambit-Evans/Hein Countergambit |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 Bxf7+ | C51 | King's Knight Opening-Italian Game-Giuoco Piano-Jerome/Kentucky Gambit |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 c3 | C53 | King's Knight Opening-Italian Game-Giuoco Piano-Classical Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 c3 d6 5 d4 exd4 6 cxd4 Bb4+ 7 Kf1 | C53 | Italian Game-Giuoco Piano-Classical Variation-Miss in baulk Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 c3 d6 5 d4 exd4 6 cxd4 Bb6 | C53 | Italian Game-Giuoco Piano-Classical Variation-De LaBourdonnais Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 c3 f5 | C53 | Italian Game-Giuoco Piano-Classical Variation-Alexandre Gambit |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 c3 Nf6 5 0-0 | C53 | Italian Game-Giuoco Piano-Classical Variation-Albin Gambit |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 c3 Nf6 5 b4 | C53/C54 | King's Knight Opening-Giuoco Piano-Classical Variation-Bird's Attack |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 c3 Nf6 5 d3 | C53/C54 | Italian Game-Giuoco Piano-Classical Variation-Giuoco Pianissimo |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 c3 Nf6 5 d3 a6 6 Bb3 Ba7 7 h3 0-0 8 0-0 d6 9 Re1 | C53 | Giuoco Piano-Classical Variation-Giuoco Pianissimo-Main Line |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 c3 Nf6 5 d4 | C53 | Italian Game-Giuoco Piano-Classical Variation-Centre Attack |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 c3 Nf6 5 d4 exd4 6 0-0 | C53/C54 | Giuoco Piano-Classical Variation-Centre Attack-Mason Gambit |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 c3 Nf6 5 d4 exd4 (6 cxd4) | C54 | Giuoco Piano-Classical Variation-Centre Attack-Greco Gambit |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 c3 Nf6 5 d4 exd4 6 cxd4 Bb4+ 7 Bd2 Nxe4 8 Bxb4 Nxb4 9 Bxf7+ Kxf7 10 Qb3+ d5 11 Ne5+ Kf6 12 f3 | C54 | Giuoco Piano-Centre Attack-Greco Gambit-Krause Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 c3 Nf6 5 d4 exd4 6 cxd4 Bb4+ 7 Kf1 | C54 | Giuoco Piano-Centre Attack-Greco Gambit-Cracow Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 c3 Nf6 5 d4 exd4 6 cxd4 Bb4+ 7 Nc3 | C54 | Giuoco Piano-Centre Attack-Greco Gambit-Greco's Attack |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 c3 Nf6 5 d4 exd4 6 cxd4 Bb4+ 7 Nc3 Nxe4 8 0-0 Bxc3 | C54 | Giuoco Piano-Centre Attack-Greco Gambit-Greco's Attack |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 c3 Nf6 5 d4 exd4 6 cxd4 Bb4+ 7 Nc3 Nxe4 8 0-0 Bxc3 9 bxc3 d5 10 Ba3 | C54 | Giuoco Piano-Greco Gambit-Greco's Attack-Steinitz Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 c3 Nf6 5 d4 exd4 6 cxd4 Bb4+ 7 Nc3 Nxe4 8 0-0 Bxc3 9 d5 | C54 | Giuoco Piano-Greco Gambit-Greco's Attack-Möller-Therkatz Attack |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 c3 Nf6 5 d4 exd4 6 cxd4 Bb4+ 7 Nc3 Nxe4 8 0-0 Bxc3 9 d5 Bf6 10 Re1 Ne7 11 Rxe4 d6 12 Bg5 Bxg5 13 Nxg5 0-0 14 Nxh7 | C54 | Giuoco Piano-Greco's Attack-Möller-Therkatz Attack-Therkatz-Herzog Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 c3 Nf6 5 d4 exd4 6 cxd4 Bb4+ 7 Nc3 Nxe4 8 0-0 Bxc3 9 d5 Bf6 10 Re1 Ne7 11 Rxe4 d6 12 g4 | C54 | Giuoco Piano-Greco's Attack-Möller-Therkatz Attack-Moeller-Bayonet Attack |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 c3 Nf6 5 d4 exd4 6 cxd4 Bb4+ 7 Nc3 Nxe4 8 0-0 Nxc3 | C54 | Giuoco Piano-Greco Gambit-Greco's Attack-Greco Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 c3 Nf6 5 d4 exd4 6 cxd4 Bb4+ 7 Nc3 Nxe4 8 0-0 Nxc3 9 bxc3 Bxc3 10 Ba3 | C54 | Giuoco Piano-Greco's Attack-Greco Variation-Aitken Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 c3 Nf6 5 d4 exd4 6 cxd4 Bb4+ 7 Nc3 Nxe4 8 0-0 Nxc3 9 bxc3 Bxc3 10 Qb3 d5 | C54 | Giuoco Piano-Greco's Attack-Greco Variation-Bernstein Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 c3 Nf6 5 d4 exd4 6 e5 d5 | C53 | Giuoco Piano-Classical Variation-Centre Attack-Greco Gambit |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 c3 Nf6 5 d4 exd4 6 e5 d5 7 Bb5 Ne4 8 cxd4 Bb4+ | C54 | Giuoco Piano-Centre Attack-Greco Gambit-Anderssen Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 c3 Nf6 5 d4 exd4 6 e5 Ne4 7 Bd5 Nxf2 8 Kxf2 dxc3+ 9 Kg3 | C53 | Giuoco Piano-Classical Variation-Centre Attack-Ghulam Kassim Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 c3 Qe7 | C53 | Italian Game-Giuoco Piano-Classical Variation-Closed Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 c3 Qe7 5 d4 Bb6 | C53 | Giuoco Piano-Classical Variation-Closed Variation-Centre-Holding Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 c3 Qe7 5 d4 Bb6 6 0-0 Nf6 7 a4 a6 8 Re1 d6 9 h3 | C53 | Giuoco Piano-Closed Variation-Centre-Holding Variation-Tarrasch Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 c3 Qe7 5 d4 Bb6 6 Bg5 | C53 | Giuoco Piano-Closed Variation-Centre-Holding Variation-Mestel Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 c3 Qe7 5 d4 Bb6 6 d5 Nb8 7 d6 | C53 | Giuoco Piano-Closed Variation-Centre-Holding Variation-Eisinger Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 d3 | C50 | King's Knight Opening-Italian Game-Giuoco Piano-Giuoco Pianissimo |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 d3 f5 | C50 | Italian Game-Giuoco Piano-Giuoco Pianissimo-Lucchini Gambit |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 d3 f5 5 Ng5 f4 | C50 | Giuoco Piano-Giuoco Pianissimo-Lucchini Gambit-Dubois Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 d3 Nf6 | C50 | Italian Game-Giuoco Piano-Giuoco Pianissimo-Normal Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 d3 Nf6 5 Nc3 | C50 | Giuoco Piano-Giuoco Pianissimo-Normal Variation-Italian 4 Knights Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 d3 Nf6 5 Nc3 d6 6 Bg5 | C50 | Giuoco Pianissimo-Normal Variation-Italian 4 Knights Variation-Canal Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 d4 | C50 | King's Knight Opening-Italian Game-Giuoco Piano-Rosentreter Gambit |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 Nc3 Nf6 | C50 | King's Knight Opening-Italian Game-Giuoco Piano-4 Knights Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 Nc3 Nf6 5 d3 | C50 | Italian Game-Giuoco Piano-4 Knights Variation-Giuoco Pianissimo |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 Nc3 Nf6 5 d3 d6 6 Bg5 | C50 | Giuoco Piano-4 Knights Variation-Giuoco Pianissimo-Canal Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Bc5 4 Nc3 Nf6 5 d3 d6 6 Bg5 h6 7 Bxf6 Qxf6 8 Nd5 Qd8 9 c3 Ne7 10 d4 | C50 | Giuoco Piano-Giuoco Pianissimo-Canal Variation-Normal Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Be7 | C50 | King's Pawn-King's Knight Opening-Italian Game-Hungarian Defence |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Be7 4 d4 exd4 | C50 | King's Knight Opening-Italian Game-Hungarian Defence-Benima Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Be7 4 d4 exd4 5 c3 Nf6 6 e5 Ne4 | C50 | Italian Game-Hungarian Defence-Benima Variation-Tartakower Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 d6 | C50 | King's Pawn-King's Knight Opening-Italian Game-Semi-Italian Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 f5 | C50 | King's Pawn-King's Knight Opening-Italian Game-Rousseau Gambit |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 h6 | C55 | King's Pawn-King's Knight Opening-Italian Game-Anti-Fried Liver Defence |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Nd4 | C50 | King's Pawn-King's Knight Opening-Italian Game-Blackburne Shilling/Kostic Gambit |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Nf6 | C55 | King's Pawn-King's Knight Opening-Italian Game-2 Knights Defence |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Nf6 4 0-0 Bc5 5 d3 d6 6 Bg5 h6 7 Bh4 g5 | C55 | King's Knight Opening-Italian Game-2 Knights Defence-Steinitz Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Nf6 4 0-0 Bc5 5 d4 | C55 | King's Pawn-King's Knight Opening-2 Knights Defence-Koltanowski Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Nf6 4 0-0 Bc5 5 d4 Bxd4 6 Nxd4 Nxd4 7 Bg5 d6 | C55 | King's Knight Opening-2 Knights Defence-Koltanowski Variation-Giuoco Piano |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Nf6 4 0-0 Bc5 5 d4 Bxd4 6 Nxd4 Nxd4 7 Bg5 d6 8 f4 Qe7 9 fxe5 dxe5 10 Nc3 | C55 | King's Knight Opening-2 Knights Defence-Koltanowski Variation-Holzhausen Attack |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Nf6 4 0-0 Bc5 5 d4 Bxd4 6 Nxd4 Nxd4 7 Bg5 h6 8 Bh4 g5 9 f4 | C55 | King's Knight Opening-2 Knights Defence-Koltanowski Variation-Rosentreter Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Nf6 4 c3 | C55 | King's Knight Opening-Italian Game-2 Knights Defence-De Riviere Gambit |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Nf6 4 d3 | C55 | King's Pawn-King's Knight Opening-2 Knights Defence-Modern Bishop's Opening |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Nf6 4 d4 | C55 | King's Knight Opening-Italian Game-2 Knights Defence-Open Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Nf6 4 d4 Bd6 | C55 | King's Knight Opening-Italian Game-2 Knights Defence-Scotch Gambit Declined |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Nf6 4 d4 d6 | C55 | King's Knight Opening-Italian Game-2 Knights Defence-Scotch Gambit Declined |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Nf6 4 d4 exd4 | C55 | King's Knight Opening-2 Knights Defence-Open Variation-Dubois Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Nf6 4 d4 exd4 5 0-0 | C55 | 2 Knights Defence-Open Variation-Dubois Variation-Scotch Gambit |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Nf6 4 d4 exd4 5 0-0 Bc5 (6 e5) | C55 | 2 Knights Defence-Scotch Gambit-Dubois Variation-Max Lange Attack |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Nf6 4 d4 exd4 5 0-0 Bc5 6 c3 | C55 | 2 Knights Defence-Scotch Gambit-Max Lange Attack-Walbrodt-Baird Gambit |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Nf6 4 d4 exd4 5 0-0 Bc5 6 e5 d5 7 exf6 dxc4 8 Re1+ Be6 9 fxg7 | C56 | 2 Knights Defence-Scotch Gambit-Max Lange Attack Accepted-Schlechter Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Nf6 4 d4 exd4 5 0-0 Bc5 6 e5 d5 7 exf6 dxc4 8 Re1+ Be6 9 Ng5 g6 | C55 | 2 Knights Defence-Scotch Gambit-Max Lange Attack-Loman Defence |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Nf6 4 d4 exd4 5 0-0 Bc5 6 e5 d5 7 exf6 dxc4 8 Re1+ Be6 9 Ng5 Qd5 10 Nc3 Qf5 11 g4 Qg6 12 Nce4 Bb6 (13 f4 0-0-0) | C55 | 2 Knights Defence-Scotch Gambit-Max Lange Attack-Berger Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Nf6 4 d4 exd4 5 0-0 Bc5 6 e5 d5 7 exf6 dxc4 8 Re1+ Be6 9 Ng5 Qd5 10 Nc3 Qf5 11 Nce4 | C55 | 2 Knights Defence-Scotch Gambit-Max Lange Attack-Marshall/Long Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Nf6 4 d4 exd4 5 0-0 Bc5 6 e5 d5 7 exf6 dxc4 8 Re1+ Be6 9 Ng5 Qd5 10 Nc3 Qf5 11 Nce4 Bf8 | C55 | 2 Knights Defence-Max Lange Attack-Marshall Variation-Rubinstein Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Nf6 4 d4 exd4 5 0-0 Bc5 6 e5 Ng4 | C56 | 2 Knights Defence-Scotch Gambit-Max Lange Attack-Steinitz/Spielmann Defence |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Nf6 4 d4 exd4 5 0-0 Bc5 6 e5 Ng4 7 c3 | C55 | 2 Knights Defence-Max Lange Attack-Steinitz Defence-Krause Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Nf6 4 d4 exd4 5 0-0 Be7 | C55 | 2 Knights Defence-Dubois Variation-Scotch Gambit-De Riviere Defence |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Nf6 4 d4 exd4 5 0-0 d6 | C55 | 2 Knights Defence-Dubois Variation-Scotch Gambit-Janowski Defence |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Nf6 4 d4 exd4 5 0-0 Nxe4 | C56 | 2 Knights Defence-Dubois Variation-Scotch Gambit-Double Gambit Accepted/Anti-Lange Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Nf6 4 d4 exd4 5 0-0 Nxe4 6 Nc3 | C56 | 2 Knights Defence-Scotch Gambit-Double Gambit Accepted-Nakhmanson Gambit |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Nf6 4 d4 exd4 5 0-0 Nxe4 6 Re1 d5 7 Bxd5 Qxd5 8 Nc3 | C56 | 2 Knights Defence-Scotch Gambit-Double Gambit Accepted-Anderssen Attack |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Nf6 4 d4 exd4 5 0-0 Nxe4 6 Re1 d5 7 Bxd5 Qxd5 8 Nc3 Qa5 9 Nxe4 Be6 10 Bd2 Qd5 11 Bg5 | C56 | 2 Knights Defence-Double Gambit Accepted-Anderssen Attack-Main Line |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Nf6 4 d4 exd4 5 0-0 Nxe4 6 Re1 d5 7 Bxd5 Qxd5 8 Nc3 Qa5 9 Nxe4 Be6 10 Bg5 h6 11 Bh4 g5 12 Nf6+ Ke7 13 b4 | C56 | 2 Knights Defence-Double Gambit Accepted-Anderssen Attack-Yurdansky Attack |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Nf6 4 d4 exd4 5 0-0 Nxe4 6 Re1 d5 7 Nc3 | C56 | 2 Knights Defence-Scotch Gambit-Double Gambit Accepted-Canal Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Nf6 4 d4 exd4 5 e5 d5 6 Bb5 Ne4 7 Nxd4 Bc5 8 Nxc6 Bxf2+ 9 Kf1 Qh4 | C55 | 2 Knights Defence-Open Variation-Dubois Variation-Keidanz Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Nf6 4 d4 exd4 5 Ng5 | C55 | 2 Knights Defence-Open Variation-Dubois Variation-Perreux Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Nf6 4 Nc3 | C55 | King's Knight Opening-Italian Game-2 Knights Defence-Italian Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Nf6 4 Nc3 Nxe4 5 0-0 | C55 | Italian Game-2 Knights Defence-Italian Variation-Boden Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Nf6 4 Ng5 | C57 | King's Knight Opening-Italian Game-2 Knights Defence-Knight Attack |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Nf6 4 Ng5 Bc5 | C57 | King's Knight Opening-2 Knights Defence-Knight Attack-Wilkes Barre/Traxler Counterattack |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Nf6 4 Ng5 Bc5 5 Bxf7+ | C57 | 2 Knights Defence-Knight Attack-Wilkes Barre Counterattack-Bishop Sac Line |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Nf6 4 Ng5 Bc5 5 Bxf7+ Ke7 6 d4 | C57 | 2 Knights Defence-Wilkes Barre Counterattack-Bishop Sac Line-Trencianske-Teplice Gambit |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Nf6 4 Ng5 Bc5 5 Nxf7 | C57 | 2 Knights Defence-Knight Attack-Wilkes Barre Counterattack-Knight Sac Line |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Nf6 4 Ng5 Bc5 5 Nxf7 Bxf2+ 6 Kxf2 Nxe4+ 7 Ke3 | C57 | 2 Knights Defence-Wilkes Barre Counterattack-Knight Sac Line-King March Line |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Nf6 4 Ng5 d5 | C57 | King's Knight Opening-2 Knights Defence-Knight Attack-Gruber/Normal Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Nf6 4 Ng5 d5 5 exd5 b5 | C57 | 2 Knights Defence-Knight Attack-Gruber Variation-Ulvestad Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Nf6 4 Ng5 d5 5 exd5 b5 6 Bf1 h6 7 Nxf7 | C57 | 2 Knights Defence-Gruber Variation-Ulvestad Variation-Kurkin Gambit |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Nf6 4 Ng5 d5 5 exd5 Na5 | C58 | 2 Knights Defence-Knight Attack-Gruber Variation-Polerio Defence |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Nf6 4 Ng5 d5 5 exd5 Na5 6 Bb5+ | C58 | 2 Knights Defence-Gruber Variation-Polerio Defence-Bishop Check/Blackburne Line |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Nf6 4 Ng5 d5 5 exd5 Na5 6 Bb5+ c6 7 dxc6 bxc6 8 Be2 h6 | C59 | 2 Knights Defence-Polerio Defence-Bishop Check Line-Suhle Defence |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Nf6 4 Ng5 d5 5 exd5 Na5 6 Bb5+ c6 7 dxc6 bxc6 8 Be2 h6 9 Nf3 e4 10 Ne5 Bd6 11 d4 Qc7 12 Bd2 | C59 | 2 Knights Defence-Bishop Check Line-Suhle Defence-Knorre Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Nf6 4 Ng5 d5 5 exd5 Na5 6 Bb5+ c6 7 dxc6 bxc6 8 Be2 h6 9 Nf3 e4 10 Ne5 Qc7 | C59 | 2 Knights Defence-Bishop Check Line-Suhle Defence-Göring Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Nf6 4 Ng5 d5 5 exd5 Na5 6 Bb5+ c6 7 dxc6 bxc6 8 Be2 h6 9 Nh3 | C59 | 2 Knights Defence-Bishop Check Line-Suhle Defence-Steinitz Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Nf6 4 Ng5 d5 5 exd5 Na5 6 Bb5+ c6 7 dxc6 bxc6 8 Qf3 | C58 | 2 Knights Defence-Polerio Defence-Bishop Check Line-Bogoljubov Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Nf6 4 Ng5 d5 5 exd5 Na5 6 Bb5+ c6 7 dxc6 bxc6 8 Qf3 cxb5 | C58 | 2 Knights Defence-Bishop Check Line-Bogoljubov Variation-Blackburne/Paoli Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Nf6 4 Ng5 d5 5 exd5 Na5 6 Bb5+ c6 7 dxc6 bxc6 8 Qf3 Qc7 9 Bd3 | C58 | 2 Knights Defence-Bishop Check Line-Bogoljubov Variation-Paoli Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Nf6 4 Ng5 d5 5 exd5 Na5 6 Bb5+ c6 7 dxc6 bxc6 8 Qf3 Rb8 | C58 | 2 Knights Defence-Bishop Check Line-Bogoljubov Variation-Colman Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Nf6 4 Ng5 d5 5 exd5 Na5 6 d3 | C58 | 2 Knights Defence-Knight Attack-Polerio Defence-Kieseritsky/Kieseritzky Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Nf6 4 Ng5 d5 5 exd5 Na5 6 d3 h6 7 Nf3 e4 8 Qe2 Nxc4 9 dxc4 Bc5 10 Nfd2 | C58 | 2 Knights Defence-Polerio Defence-Kieseritsky Variation-Yankovich Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Nf6 4 Ng5 d5 5 exd5 Na5 6 d3 h6 7 Nf3 e4 8 Qe2 Nxc4 9 dxc4 Be7 | C58 | 2 Knights Defence-Polerio Defence-Kieseritsky Variation-Maróczy Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Nf6 4 Ng5 d5 5 exd5 Nb4 | C57 | 2 Knights Defence-Knight Attack-Gruber Variation-Kloss Gambit |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Nf6 4 Ng5 d5 5 exd5 Nd4 | C57 | 2 Knights Defence-Knight Attack-Gruber Variation-Fritz Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Nf6 4 Ng5 d5 5 exd5 Nd4 6 c3 b5 7 Bf1 Nxd5 8 Ne4 | C57 | 2 Knights Defence-Gruber Variation-Fritz Variation-Gruber Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Nf6 4 Ng5 d5 5 exd5 Nxd5 | C57 | 2 Knights Defence-Knight Attack-Gruber Variation-Fegatello Attack |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Nf6 4 Ng5 d5 5 exd5 Nxd5 6 d4 | C57 | 2 Knights Defence-Gruber Variation-Fegatello Attack-Lolli Attack |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Nf6 4 Ng5 d5 5 exd5 Nxd5 6 d4 Bb4+ | C57 | 2 Knights Defence-Fegatello Attack-Lolli Attack-Pincus Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Nf6 4 Ng5 d5 5 exd5 Nxd5 6 Nxf7 | C57 | 2 Knights Defence-Gruber Variation-Fegatello Attack-Fried Liver Attack |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Nf6 4 Ng5 d5 5 exd5 Nxd5 6 Nxf7 Kxf7 7 Qf3+ Ke6 8 Nc3 Ncb4 9 Qe4 c6 10 a3 Na6 11 d4 Nac7 | C57 | 2 Knights Defence-Fegatello Attack-Fried Liver Attack-Leonhardt Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Nf6 4 Ng5 d5 5 exd5 Nxd5 6 Nxf7 Kxf7 7 Qf3+ Ke6 8 Nc3 Nce7 | C57 | 2 Knights Defence-Fegatello Attack-Fried Liver Attack-Polerio Defence |
| 1 e4 e5 2 Nf3 Nc6 3 Bc4 Nf6 4 Ng5 Nxe4 | C57 | Italian Game-2 Knights Defence-Knight Attack-Ponziani-Steinitz Gambit |
| 1 e4 e5 2 Nf3 Nc6 3 Be2 | C44 Explore | King's Pawn-King's Knight Opening-Inverted Hungarian/Tayler Opening |
| 1 e4 e5 2 Nf3 Nc6 3 Be2 Nf6 4 d3 d5 5 Nbd2 | C44 | King's Pawn-King's Knight Opening-Inverted Hungarian Opening-Inverted Hanham Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Be2 Nf6 4 d4 | C44 | King's Pawn-King's Knight Opening-Inverted Hungarian Opening-Tayler Opening |
| 1 e4 e5 2 Nf3 Nc6 3 Be2 Nf6 4 d4 exd4 5 e5 | C44 | King's Knight Opening-Inverted Hungarian Opening-Tayler Opening-Basman Gambit |
| 1 e4 e5 2 Nf3 Nc6 3 c3 | C44 Explore | King's Pawn-King's Knight Opening-Ponziani Opening |
| 1 e4 e5 2 Nf3 Nc6 3 c3 Bc5 4 b4 | C44 | King's Pawn-King's Knight Opening-Ponziani Opening-Classical Variation |
| 1 e4 e5 2 Nf3 Nc6 3 c3 Be7 | C44 | King's Pawn-King's Knight Opening-Ponziani Opening-Romanishin Variation |
| 1 e4 e5 2 Nf3 Nc6 3 c3 d5 4 Bb5 | C44 | King's Pawn-King's Knight Opening-Ponziani Opening-Spanish Variation |
| 1 e4 e5 2 Nf3 Nc6 3 c3 d5 4 Bb5 dxe4 5 Nxe5 | C44 | King's Knight Opening-Ponziani Opening-Spanish Variation-Staunton Variation |
| 1 e4 e5 2 Nf3 Nc6 3 c3 d5 4 Bb5 dxe4 5 Nxe5 Qd5 6 Qa4 | C44 | King's Knight Opening-Spanish Variation-Staunton Variation-Nikitin Gambit |
| 1 e4 e5 2 Nf3 Nc6 3 c3 d5 4 Bb5 dxe4 5 Nxe5 Qg5 | C44 | King's Knight Opening-Spanish Variation-Staunton Variation-Sozin Variation |
| 1 e4 e5 2 Nf3 Nc6 3 c3 d5 4 Qa4 Bd7 | C44 | King's Pawn-King's Knight Opening-Ponziani Opening-Caro Variation |
| 1 e4 e5 2 Nf3 Nc6 3 c3 d5 4 Qa4 Bd7 5 exd5 Nd4 6 Qd1 Nxf3+ 7 Qxf3 f5 8 Bc4 Bd6 9 d3 | C44 | King's Knight Opening-Ponziani Opening-Caro Variation-Tartakower Variation |
| 1 e4 e5 2 Nf3 Nc6 3 c3 d5 4 Qa4 dxe4 | C44 | King's Pawn-King's Knight Opening-Ponziani Opening-Bird Variation |
| 1 e4 e5 2 Nf3 Nc6 3 c3 d5 4 Qa4 f6 | C44 | King's Pawn-King's Knight Opening-Ponziani Opening-Steinitz Variation |
| 1 e4 e5 2 Nf3 Nc6 3 c3 d5 4 Qa4 Nf6 | C44 | King's Pawn-King's Knight Opening-Ponziani Opening-Leonhardt Variation |
| 1 e4 e5 2 Nf3 Nc6 3 c3 d5 4 Qa4 Qd6 | C44 | King's Pawn-King's Knight Opening-Ponziani Opening-Worrall Variation |
| 1 e4 e5 2 Nf3 Nc6 3 c3 f5 | C44 | King's Pawn-King's Knight Opening-Ponziani Opening-Ponziani Countergambit |
| 1 e4 e5 2 Nf3 Nc6 3 c3 f5 4 d4 d6 5 d5 | C44 | King's Knight Opening-Ponziani Opening-Ponziani Countergambit-Schmidt Attack |
| 1 e4 e5 2 Nf3 Nc6 3 c3 f5 4 d4 d6 5 d5 fxe4 6 Ng5 Nb8 7 Nxe4 Nf6 8 Bd3 Be7 | C44 | King's Knight Opening-Ponziani Countergambit-Schmidt Attack-Cordel Variation |
| 1 e4 e5 2 Nf3 Nc6 3 c3 Nf6 | C44 | King's Pawn-King's Knight Opening-Ponziani Opening-Jaenisch Counterattack |
| 1 e4 e5 2 Nf3 Nc6 3 c3 Nf6 4 Bc4 | C44 | King's Knight Opening-Ponziani Opening-Jaenisch Counterattack-Neumann Gambit |
| 1 e4 e5 2 Nf3 Nc6 3 c3 Nf6 4 d3 | C44 | King's Knight Opening-Ponziani Opening-Jaenisch Counterattack-Modern Variation |
| 1 e4 e5 2 Nf3 Nc6 3 c3 Nf6 4 d4 d6 | C44 | King's Knight Opening-Ponziani Opening-Jaenisch Counterattack-Pirc Variation |
| 1 e4 e5 2 Nf3 Nc6 3 c3 Nf6 4 d4 exd4 | C44 | King's Knight Opening-Ponziani Opening-Jaenisch Counterattack-Gunsberg Variation |
| 1 e4 e5 2 Nf3 Nc6 3 c3 Nf6 4 d4 Nxe4 5 d5 Bc5 | C44 | King's Knight Opening-Ponziani Opening-Jaenisch Counterattack-Fraser Defence/Vukovic Gambit |
| 1 e4 e5 2 Nf3 Nc6 3 c3 Nf6 4 Qa4 | C44 | King's Knight Opening-Ponziani Opening-Jaenisch Counterattack-Potter Variation |
| 1 e4 e5 2 Nf3 Nc6 3 c3 Nf6 4 Qc2 | C44 | King's Knight Opening-Ponziani Opening-Jaenisch Counterattack-Wayte Variation |
| 1 e4 e5 2 Nf3 Nc6 3 c3 Nge7 | C44 | King's Pawn-King's Knight Opening-Ponziani Opening-Réti Variation |
| 1 e4 e5 2 Nf3 Nc6 3 c4 | C44 Explore | King's Pawn-King's Knight Opening-Italian Game-Dresden Opening |
| 1 e4 e5 2 Nf3 Nc6 3 c4 Nf6 4 Nxe5 | C44 | King's Pawn-King's Knight Opening-Dresden Opening-The Goblin |
| 1 e4 e5 2 Nf3 Nc6 3 d3 | C44 Explore | King's Pawn-King's Knight Opening-Torre Opening |
| 1 e4 e5 2 Nf3 Nc6 3 d4 | C44 Explore | King's Pawn-King's Knight Opening-Scotch Game |
| 1 e4 e5 2 Nf3 Nc6 3 d4 a6 | C44 | King's Pawn-King's Knight Opening-Scotch Game-Lafitte Variation |
| 1 e4 e5 2 Nf3 Nc6 3 d4 Bb4+ | C44 | King's Pawn-King's Knight Opening-Scotch Game-Crown Variation |
| 1 e4 e5 2 Nf3 Nc6 3 d4 Bd6 | C44 | King's Pawn-King's Knight Opening-Scotch Game-Al Pacino Variation |
| 1 e4 e5 2 Nf3 Nc6 3 d4 d5 | C44 | King's Pawn-King's Knight Opening-Scotch Game-Lasker Counterattack |
| 1 e4 e5 2 Nf3 Nc6 3 d4 d6 | C44 | King's Pawn-King's Knight Opening-Scotch Game-Fonaroff Defence |
| 1 e4 e5 2 Nf3 Nc6 3 d4 exd4 4 Bb5 | C44 | King's Pawn-King's Knight Opening-Scotch Game-Relfsson/MacLopez Gambit |
| 1 e4 e5 2 Nf3 Nc6 3 d4 exd4 4 Bc4 Bb4+ | C44 | King's Pawn-King's Knight Opening-Scotch Game-London Defence |
| 1 e4 e5 2 Nf3 Nc6 3 d4 exd4 4 Bc4 Bb4+ 5 c3 dxc3 6 0-0 cxb2 7 Bxb2 Nf6 8 Ng5 0-0 9 e5 Nxe5 | C44 | King's Knight Opening-Scotch Game-London Defence-Hanneken Variation |
| 1 e4 e5 2 Nf3 Nc6 3 d4 exd4 4 Bc4 Bb4+ 5 c3 dxc3 6 bxc3 (Ba5 7 e5) | C44 | King's Knight Opening-Scotch Game-London Defence-Cochrane's Attack |
| 1 e4 e5 2 Nf3 Nc6 3 d4 exd4 4 Bc4 Bc5 | C45 | King's Pawn-King's Knight Opening-Scotch Game-Haxo Gambit |
| 1 e4 e5 2 Nf3 Nc6 3 d4 exd4 4 Bc4 Bc5 5 0-0 d6 6 c3 Bg4 | C44 | King's Pawn-King's Knight Opening-Scotch Game-Haxo Gambit-Cochrane-Anderssen/Paulsen/Suhle Counterattack |
| 1 e4 e5 2 Nf3 Nc6 3 d4 exd4 4 Bc4 Bc5 5 Ng5 | C44 | King's Pawn-King's Knight Opening-Scotch Game-Haxo Gambit-Saratt Variation |
| 1 e4 e5 2 Nf3 Nc6 3 d4 exd4 4 Bc4 Bc5 5 Ng5 Nh6 6 Nxf7 Nxf7 7 Bxf7+ Kxf7 8 Qh5+ g6 9 Qxc5 d5 | C44 | King's Knight Opening-Scotch Game-Haxo Gambit-Saratt Variation-Cochrane-Schumoff Defence |
| 1 e4 e5 2 Nf3 Nc6 3 d4 exd4 4 Bc4 Bc5 5 Ng5 Nh6 6 Nxf7 Nxf7 7 Bxf7+ Kxf7 8 Qh5+ g6 9 Qxc5 d6 | C44 | King's Knight Opening-Scotch Game-Haxo Gambit-Saratt Variation-Cochrane-Schumov Defence |
| 1 e4 e5 2 Nf3 Nc6 3 d4 exd4 4 Bc4 Bc5 5 Ng5 Nh6 6 Qh5 | C44 | King's Knight Opening-Scotch Game-Haxo Gambit-Saratt Variation-Count Vitzthum's Attack |
| 1 e4 e5 2 Nf3 Nc6 3 d4 exd4 4 Bc4 Be7 | C44 | King's Pawn-King's Knight Opening-Scotch Game-Benima Defence |
| 1 e4 e5 2 Nf3 Nc6 3 d4 exd4 4 Bc4 Nf6 | C44 | King's Pawn-King's Knight Opening-Scotch Game-Dubois-Réti Defence |
| 1 e4 e5 2 Nf3 Nc6 3 d4 exd4 4 Bc4 Nf6 5 e5 | C45 | King's Knight Opening-Scotch Game-Dubois-Réti Defence-Advance Variation |
| 1 e4 e5 2 Nf3 Nc6 3 d4 exd4 4 Bc4 Nf6 5 e5 Ng4 | C45 | Scotch Game-Dubois-Réti Defence-Advance Variation-Kingside Variation |
| 1 e4 e5 2 Nf3 Nc6 3 d4 exd4 4 c3 | C44 | King's Pawn-King's Knight Opening-Scotch Game-Göring Gambit |
| 1 e4 e5 2 Nf3 Nc6 3 d4 exd4 4 c3 d5 | C44 | King's Pawn-King's Knight Opening-Scotch Game-Göring Gambit Declined |
| 1 e4 e5 2 Nf3 Nc6 3 d4 exd4 4 c3 dxc3 5 Bc4 | C44 | King's Knight Opening-Scotch Game-Göring Gambit-Double Pawn Sacrifice |
| 1 e4 e5 2 Nf3 Nc6 3 d4 exd4 4 c3 dxc3 5 Nxc3 Bb4 | C44 | King's Knight Opening-Scotch Game-Göring Gambit-Main Line |
| 1 e4 e5 2 Nf3 Nc6 3 d4 exd4 4 c3 dxc3 5 Nxc3 Bb4 6 Bc4 Nf6 | C44 | Scotch Game-Göring Gambit-Main Line-Bardeleben Variation |
| 1 e4 e5 2 Nf3 Nc6 3 d4 exd4 4 c3 dxc3 5 Nxc3 d6 6 Bc4 Bg4 7 0-0 Ne5 8 Nxe5 Bxd1 9 Bxf7+ Ke7 10 Nd5# | C44 | King's Knight Opening-Scotch Game-Göring Gambit-Sea-cadet Mate |
| 1 e4 e5 2 Nf3 Nc6 3 d4 exd4 4 Nxd4 | C45 | King's Pawn-King's Knight Opening-Scotch Game |
| 1 e4 e5 2 Nf3 Nc6 3 d4 exd4 4 Nxd4 Bb4+ | C45 | King's Pawn-King's Knight Opening-Scotch Game-Malaniuk Variation |
| 1 e4 e5 2 Nf3 Nc6 3 d4 exd4 4 Nxd4 Bc5 | C45 | King's Pawn-King's Knight Opening-Scotch Game-Classical Variation |
| 1 e4 e5 2 Nf3 Nc6 3 d4 exd4 4 Nxd4 Bc5 5 Be3 | C45 | King's Knight Opening-Scotch Game-Classical Variation-Golmayo Variation |
| 1 e4 e5 2 Nf3 Nc6 3 d4 exd4 4 Nxd4 Bc5 5 Be3 Bb6 | C45 | Scotch Game-Classical Variation-Golmayo Variation-Loyd Variation |
| 1 e4 e5 2 Nf3 Nc6 3 d4 exd4 4 Nxd4 Bc5 5 Be3 Qf6 6 c3 Nge7 7 Bb5 | C45 | Scotch Game-Classical Variation-Golmayo Variation-Paulsen Attack |
| 1 e4 e5 2 Nf3 Nc6 3 d4 exd4 4 Nxd4 Bc5 5 Be3 Qf6 6 c3 Nge7 7 Bb5 Nd8 | C45 | Scotch Game-Golmayo Variation-Paulsen Attack-Gunsberg Defence |
| 1 e4 e5 2 Nf3 Nc6 3 d4 exd4 4 Nxd4 Bc5 5 Be3 Qf6 6 c3 Nge7 7 Nc2 | C45 | Scotch Game-Classical Variation-Golmayo Variation-Fleissig's Attack/Meitner Variation |
| 1 e4 e5 2 Nf3 Nc6 3 d4 exd4 4 Nxd4 Bc5 5 Be3 Qf6 6 c3 Nge7 7 Qd2 | C45 | Scotch Game-Classical Variation-Golmayo Variation-Blackburne Attack |
| 1 e4 e5 2 Nf3 Nc6 3 d4 exd4 4 Nxd4 Bc5 5 Be3 Qf6 6 c3 Nge7 7 Qd2 d5 8 Nb5 Bxe3 9 Qxe3 0-0 10 Nxc7 Rb8 11 Nxd5 Nxd5 12 exd5 Nb4 | C45 | Scotch Game-Golmayo Variation-Blackburne Attack-Gottschall Variation |
| 1 e4 e5 2 Nf3 Nc6 3 d4 exd4 4 Nxd4 Bc5 5 Be3 Qf6 6 c3 Qg6 | C45 | Scotch Game-Classical Variation-Golmayo Variation-Millennium Variation |
| 1 e4 e5 2 Nf3 Nc6 3 d4 exd4 4 Nxd4 Bc5 5 Be3 Qf6 6 Nb5 | C45 | Scotch Game-Classical Variation-Golmayo Variation-Blumenfeld Attack |
| 1 e4 e5 2 Nf3 Nc6 3 d4 exd4 4 Nxd4 Bc5 5 Nb3 | C45 | King's Knight Opening-Scotch Game-Classical Variation-Potter Variation |
| 1 e4 e5 2 Nf3 Nc6 3 d4 exd4 4 Nxd4 Bc5 5 Nb3 Bb4+ | C45 | Scotch Game-Classical Variation-Potter Variation-Romanishin Variation |
| 1 e4 e5 2 Nf3 Nc6 3 d4 exd4 4 Nxd4 Bc5 5 Nxc6 Qf6 | C45 | King's Knight Opening-Scotch Game-Classical Variation-Intermezzo Variation |
| 1 e4 e5 2 Nf3 Nc6 3 d4 exd4 4 Nxd4 Be7 | C45 | King's Pawn-King's Knight Opening-Scotch Game-Benima's Defence |
| 1 e4 e5 2 Nf3 Nc6 3 d4 exd4 4 Nxd4 Nf6 | C45 | King's Pawn-King's Knight Opening-Scotch Game-Schmidt/Schmid Variation |
| 1 e4 e5 2 Nf3 Nc6 3 d4 exd4 4 Nxd4 Nf6 5 e5 | C45 | King's Knight Opening-Scotch Game-Schmidt Variation-Alekhine Gambit |
| 1 e4 e5 2 Nf3 Nc6 3 d4 exd4 4 Nxd4 Nf6 5 Nc3 Nxe4 | C45 | King's Knight Opening-Scotch Game-Schmidt Variation-Schmid Gambit |
| 1 e4 e5 2 Nf3 Nc6 3 d4 exd4 4 Nxd4 Nf6 5 Nxc6 bxc6 6 e5 | C45 | King's Knight Opening-Scotch Game-Schmidt Variation-Mieses Variation |
| 1 e4 e5 2 Nf3 Nc6 3 d4 exd4 4 Nxd4 Nf6 5 Nxc6 bxc6 6 Nd2 | C45 | King's Knight Opening-Scotch Game-Schmidt Variation-Tartakower Variation |
| 1 e4 e5 2 Nf3 Nc6 3 d4 exd4 4 Nxd4 Nxd4 5 Qxd4 d6 6 Bd3 | C45 | King's Pawn-King's Knight Opening-Scotch Game-Ghulam Kassim Variation |
| 1 e4 e5 2 Nf3 Nc6 3 d4 exd4 4 Nxd4 Qh4 | C45 | King's Pawn-King's Knight Opening-Scotch Game-Pulling Counterattack |
| 1 e4 e5 2 Nf3 Nc6 3 d4 exd4 4 Nxd4 Qh4 5 Be3 | C45 | King's Knight Opening-Scotch Game-Pulling Counterattack-Braune Variation |
| 1 e4 e5 2 Nf3 Nc6 3 d4 exd4 4 Nxd4 Qh4 5 Nb5 | C45 | King's Knight Opening-Scotch Game-Pulling Counterattack-Horwitz Attack |
| 1 e4 e5 2 Nf3 Nc6 3 d4 exd4 4 Nxd4 Qh4 5 Nb5 Bb4+ 6 Bd2 Qxe4+ 7 Be2 Kd8 8 0-0 Bxd2 9 Nxd2 Qf4 10 a4 | C45 | Scotch Game-Pulling Counterattack-Horwitz Attack-MacDonell Variation |
| 1 e4 e5 2 Nf3 Nc6 3 d4 exd4 4 Nxd4 Qh4 5 Nb5 Bb4+ 6 Bd2 Qxe4+ 7 Be2 Kd8 8 0-0 Bxd2 9 Nxd2 Qf4 10 c4 | C45 | Scotch Game-Pulling Counterattack-Horwitz Attack-Vienna Variation |
| 1 e4 e5 2 Nf3 Nc6 3 d4 exd4 4 Nxd4 Qh4 5 Nb5 Bb4+ 6 Bd2 Qxe4+ 7 Be2 Kd8 8 0-0 Bxd2 9 Nxd2 Qg6 | C45 | Scotch Game-Pulling Counterattack-Horwitz Attack-Rosenthal Variation |
| 1 e4 e5 2 Nf3 Nc6 3 d4 exd4 4 Nxd4 Qh4 5 Nb5 Bb4+ 6 Bd2 Qxe4+ 7 Be2 Kd8 8 0-0 Bxd2 9 Qxd2 | C45 | Scotch Game-Pulling Counterattack-Horwitz Attack-Blackburne Variation |
| 1 e4 e5 2 Nf3 Nc6 3 d4 exd4 4 Nxd4 Qh4 5 Nb5 Bb4+ 6 Nd2 Qxe4+ 7 Be2 Qxg2 8 Bf3 Qh3 9 Nxc7+ Kd8 10 Nxa8 Nf6 11 a3 | C45 | Scotch Game-Pulling Counterattack-Horwitz Attack-Berger Variation |
| 1 e4 e5 2 Nf3 Nc6 3 d4 exd4 4 Nxd4 Qh4 5 Nc3 | C45 | King's Knight Opening-Scotch Game-Pulling Counterattack-Steinitz Variation |
| 1 e4 e5 2 Nf3 Nc6 3 d4 exd4 4 Nxd4 Qh4 5 Nc3 Bb4 | C45 | Scotch Game-Pulling Counterattack-Steinitz Variation-Modern Defence |
| 1 e4 e5 2 Nf3 Nc6 3 d4 exd4 4 Nxd4 Qh4 5 Nf3 | C45 | King's Knight Opening-Scotch Game-Pulling Counterattack-Fraser's Attack |
| 1 e4 e5 2 Nf3 Nc6 3 d4 exd4 4 Nxd4 Qh4 5 Nf5 | C45 | King's Knight Opening-Scotch Game-Pulling Counterattack-Paulsen Variation |
| 1 e4 e5 2 Nf3 Nc6 3 d4 f5 | C44 | King's Pawn-King's Knight Opening-Scotch Game-Anderssen Gambit |
| 1 e4 e5 2 Nf3 Nc6 3 d4 f6 | C44 | King's Pawn-King's Knight Opening-Scotch Game-Bayer Defence |
| 1 e4 e5 2 Nf3 Nc6 3 d4 Nf6 | C44 | King's Pawn-King's Knight Opening-Scotch Game-Mattern Counterattack |
| 1 e4 e5 2 Nf3 Nc6 3 d4 Nxd4 | C44 | King's Pawn-King's Knight Opening-Scotch Game-Lolli Variation |
| 1 e4 e5 2 Nf3 Nc6 3 d4 Nxd4 4 Nxd4 exd4 5 Bc4 | C44 | King's Knight Opening-Scotch Game-Lolli Variation-Napoleon Gambit |
| 1 e4 e5 2 Nf3 Nc6 3 d4 Nxd4 4 Nxe5 Ne6 5 Bc4 c6 6 0-0 Nf6 7 Nxf7 | C44 | King's Knight Opening-Scotch Game-Lolli Variation-Delayed Cochrane Variation |
| 1 e4 e5 2 Nf3 Nc6 3 d4 Nxd4 4 Nxe5 Ne6 5 Bc4 c6 6 Nxf7 | C44 | King's Knight Opening-Scotch Game-Lolli Variation-Cochrane Variation |
| 1 e4 e5 2 Nf3 Nc6 3 d4 Qe7 | C44 | King's Pawn-King's Knight Opening-Scotch Game-Virviescas Sanchez Variation |
| 1 e4 e5 2 Nf3 Nc6 3 d4 Qf6 | C44 | King's Pawn-King's Knight Opening-Scotch Game-Papakanellos Variation |
| 1 e4 e5 2 Nf3 Nc6 3 g3 | C44 Explore | King's Pawn-King's Knight Opening-Konstantinopolsky Opening |
| 1 e4 e5 2 Nf3 Nc6 3 h3 | C44 Explore | King's Pawn-King's Knight Opening-Coll Opening |
| 1 e4 e5 2 Nf3 Nc6 3 Nc3 | C46 Explore | King's Pawn-King's Knight Opening-3 Knights Game |
| 1 e4 e5 2 Nf3 Nc6 3 Nc3 Bb4 4 Nd5 Nf6 | C46 | King's Pawn-King's Knight Opening-3 Knights Game-Schlechter Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Nc3 f5 | C46 | King's Pawn-King's Knight Opening-3 Knights Game-Winawer/Gothic Defence |
| 1 e4 e5 2 Nf3 Nc6 3 Nc3 g6 | C46 | King's Pawn-King's Knight Opening-3 Knights Game-Steinitz Defence |
| 1 e4 e5 2 Nf3 Nc6 3 Nc3 g6 4 d4 exd4 5 Nd5 | C46 | King's Pawn-3 Knights Game-Steinitz Defence-Rosenthal Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Nc3 Nf6 | C46 | King's Pawn-King's Knight Opening-4 Knights Game |
| 1 e4 e5 2 Nf3 Nc6 3 Nc3 Nf6 4 a3 | C46 | King's Pawn-King's Knight Opening-4 Knights Game-Gunsberg Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Nc3 Nf6 4 a3 d5 | C46 | King's Knight Opening-4 Knights Game-Gunsberg Variation-Main Line |
| 1 e4 e5 2 Nf3 Nc6 3 Nc3 Nf6 4 a3 d6 5 h3 | C46 | King's Knight Opening-4 Knights Game-Gunsberg Variation-Provincial Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Nc3 Nf6 4 Bb5 | C48 | King's Pawn-King's Knight Opening-4 Knights Game-Spanish Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Nc3 Nf6 4 Bb5 a6 5 Bxc6 | C48 | King's Pawn-4 Knights Game-Spanish Variation-Ranken Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Nc3 Nf6 4 Bb5 a6 5 Bxc6 dxc6 6 Nxe5 Nxe4 7 Nxe4 Qd4 8 0-0 Qxe5 9 Re1 Be6 10 d4 Qd5 | C48 | 4 Knights Game-Spanish Variation-Ranken Variation-Spielmann Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Nc3 Nf6 4 Bb5 Bb4 | C49 | King's Pawn-King's Knight Opening-4 Knights Game-Double Spanish/Brentano Variation/Double Ruy Lopez |
| 1 e4 e5 2 Nf3 Nc6 3 Nc3 Nf6 4 Bb5 Bb4 5 0-0 0-0 6 Bxc6 | C49 | King's Pawn-4 Knights Game-Double Ruy Lopez-Nimzowitsch/Paulsen Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Nc3 Nf6 4 Bb5 Bb4 5 0-0 0-0 6 d3 Bxc3 7 bxc3 d5 | C49 | King's Pawn-4 Knights Game-Double Ruy Lopez-Svenonius Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Nc3 Nf6 4 Bb5 Bb4 5 0-0 0-0 6 d3 Bxc3 7 bxc3 d6 8 Re1 | C49 | King's Pawn-4 Knights Game-Double Ruy Lopez-Janowski Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Nc3 Nf6 4 Bb5 Bb4 5 0-0 0-0 6 d3 d6 | C49 | King's Pawn-4 Knights Game-Double Ruy Lopez-Symmetrical Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Nc3 Nf6 4 Bb5 Bb4 5 0-0 0-0 6 d3 d6 7 Bg5 Be6 | C49 | 4 Knights Game-Double Ruy Lopez-Symmetrical Variation-Tarrasch Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Nc3 Nf6 4 Bb5 Bb4 5 0-0 0-0 6 d3 d6 7 Bg5 Bg4 8 Nd5 Nd4 9 Nxb4 Nxb5 10 Nd5 | C49 | 4 Knights Game-Double Ruy Lopez-Symmetrical Variation-Alapin Attack |
| 1 e4 e5 2 Nf3 Nc6 3 Nc3 Nf6 4 Bb5 Bb4 5 0-0 0-0 6 d3 d6 7 Bg5 Bxc3 8 bxc3 h6 9 Bh4 g5 10 Nxg5 Nxe4 | C49 | 4 Knights Game-Double Ruy Lopez-Symmetrical Variation-Alapin Defence |
| 1 e4 e5 2 Nf3 Nc6 3 Nc3 Nf6 4 Bb5 Bb4 5 0-0 0-0 6 d3 d6 7 Bg5 Bxc3 8 bxc3 Qe7 | C49 | 4 Knights Game-Double Ruy Lopez-Symmetrical Variation-Metger Unpin |
| 1 e4 e5 2 Nf3 Nc6 3 Nc3 Nf6 4 Bb5 Bb4 5 0-0 0-0 6 d3 d6 7 Bg5 Bxc3 8 bxc3 Qe7 9 Re1 Nd8 10 d4 Bg4 | C49 | 4 Knights Game-Double Ruy Lopez-Metger Unpin-Capablanca Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Nc3 Nf6 4 Bb5 Bb4 5 0-0 0-0 6 d3 d6 7 Bg5 Ne7 | C49 | 4 Knights Game-Double Ruy Lopez-Symmetrical Variation-Pillsbury Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Nc3 Nf6 4 Bb5 Bb4 5 0-0 0-0 6 d3 d6 7 Bg5 Ne7 8 Nh4 c6 9 Bc4 d5 10 Bb3 Qd6 | C49 | 4 Knights Game-Double Ruy Lopez-Pillsbury Variation-Blake Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Nc3 Nf6 4 Bb5 Bb4 5 0-0 0-0 6 d3 d6 7 Ne2 | C49 | 4 Knights Game-Double Ruy Lopez-Symmetrical Variation-Maroczy System |
| 1 e4 e5 2 Nf3 Nc6 3 Nc3 Nf6 4 Bb5 Bb4 5 0-0 0-0 6 d3 Qe7 7 Ne2 d5 | C49 | King's Pawn-4 Knights Game-Double Ruy Lopez-Alatortsev Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Nc3 Nf6 4 Bb5 Bb4 5 0-0 0-0 6 Nd5 Bc5 7 d4 | C49 | 4 Knights Game-Double Ruy Lopez-Blackburne's Attack |
| 1 e4 e5 2 Nf3 Nc6 3 Nc3 Nf6 4 Bb5 Bb4 5 0-0 0-0 6 Nd5 Nxd5 7 exd5 e4 | C49 | King's Pawn-4 Knights Game-Double Ruy Lopez-Gunsberg Counterattack |
| 1 e4 e5 2 Nf3 Nc6 3 Nc3 Nf6 4 Bb5 Bb4 5 Nd5 Bc5 6 c3 | C49 | King's Pawn-4 Knights Game-Double Ruy Lopez-Fleissig's Attack |
| 1 e4 e5 2 Nf3 Nc6 3 Nc3 Nf6 4 Bb5 Bc5 | C48 | King's Pawn-4 Knights Game-Spanish Variation-Classical Defence |
| 1 e4 e5 2 Nf3 Nc6 3 Nc3 Nf6 4 Bb5 Bc5 5 0-0 0-0 6 Nxe5 Nd4 | C48 | 4 Knights Game-Spanish Variation-Classical Defence-Marshall Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Nc3 Nf6 4 Bb5 Bc5 5 0-0 0-0 6 Nxe5 Nxe5 7 d4 Bd6 8 f4 Nc6 9 e5 Bb4 | C48 | 4 Knights Game-Spanish Variation-Classical Defence-Bardeleben Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Nc3 Nf6 4 Bb5 Bc5 5 Nxe5 Nd4 6 Ba4 0-0 | C48 | 4 Knights Game-Spanish Variation-Classical Defence-Marshall Gambit |
| 1 e4 e5 2 Nf3 Nc6 3 Nc3 Nf6 4 Bb5 d6 5 d3 | C48 | King's Knight Opening-4 Knights Game-Spanish Variation-Rosenthal Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Nc3 Nf6 4 Bb5 Nd4 | C48 | King's Pawn-4 Knights Game-Spanish Variation-Rubinstein Countergambit |
| 1 e4 e5 2 Nf3 Nc6 3 Nc3 Nf6 4 Bb5 Nd4 5 0-0 | C48 | 4 Knights Game-Spanish Variation-Rubinstein Countergambit-Henneberger Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Nc3 Nf6 4 Bb5 Nd4 5 Be2 Nxf3+ 6 Bxf3 Bc5 7 0-0 0-0 8 d3 d6 9 Na4 Bb6 | C48 | 4 Knights Game-Spanish Variation-Rubinstein Countergambit-Maróczy Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Nc3 Nf6 4 Bb5 Nd4 5 Nxd4 | C48 | 4 Knights Game-Spanish Variation-Rubinstein Countergambit Accepted/Exchange Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Nc3 Nf6 4 Bb5 Nd4 5 Nxe5 Qe7 6 f4 | C48 | 4 Knights Game-Spanish Variation-Rubinstein Countergambit-Bogoljubov Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Nc3 Nf6 4 Bc4 | C46 | King's Pawn-King's Knight Opening-4 Knights Game-Italian Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Nc3 Nf6 4 Bc4 Bc5 | C46 | King's Knight Opening-4 Knights Game-Italian Variation-Symmetrical/Giuoco Piano Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Nc3 Nf6 4 Bc4 Bc5 5 d3 | C46 | 4 Knights Game-Italian Variation-Symmetrical Variation-Giuoco Pianissimo |
| 1 e4 e5 2 Nf3 Nc6 3 Nc3 Nf6 4 Bc4 Bc5 5 d3 0-0 | C46 | 4 Knights Game-Symmetrical Variation-Giuoco Pianissimo-Main Line |
| 1 e4 e5 2 Nf3 Nc6 3 Nc3 Nf6 4 Bc4 Bc5 5 d3 0-0 6 0-0 d6 | C46 | 4 Knights Game-Giuoco Pianissimo-Main Line-Centre Prophylaxis Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Nc3 Nf6 4 Bc4 Bc5 5 d3 0-0 6 0-0 d6 7 Bg5 | C46 | 4 Knights Game-Giuoco Pianissimo-Centre Prophylaxis Variation-Main Line |
| 1 e4 e5 2 Nf3 Nc6 3 Nc3 Nf6 4 Bc4 Bc5 5 d3 0-0 6 0-0 h6 | C46 | 4 Knights Game-Giuoco Pianissimo-Main Line-Kingside Prophylaxis Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Nc3 Nf6 4 Bc4 Nxe4 | C46 | King's Knight's Opening-4 Knights Game-Italian Variation-Main Line |
| 1 e4 e5 2 Nf3 Nc6 3 Nc3 Nf6 4 Bc4 Nxe4 5 Bxf7+ | C47 | King's Knight Opening-4 Knights Game-Italian Variation-Noa Gambit |
| 1 e4 e5 2 Nf3 Nc6 3 Nc3 Nf6 4 Be2 | C47 | King's Pawn-King's Knight Opening-4 Knights Game-Van Der Wiel Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Nc3 Nf6 4 d4 | C47 | King's Pawn-King's Knight Opening-4 Knights Game-Scotch Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Nc3 Nf6 4 d4 Bb4 5 d5 Nd4 | C47 | King's Knight Opening-4 Knights Game-Scotch Variation-Oxford Gambit |
| 1 e4 e5 2 Nf3 Nc6 3 Nc3 Nf6 4 d4 Bb4 5 Nxe5 | C47 | King's Pawn-4 Knights Game-Scotch Variation-Krause Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Nc3 Nf6 4 d4 Bb4 5 Nxe5 Qe7 | C47 | 4 Knights Game-Scotch Variation-Krause Variation-Leonhardt Defence |
| 1 e4 e5 2 Nf3 Nc6 3 Nc3 Nf6 4 d4 exd4 | C47 | King's Pawn-King's Knight Opening-4 Knights Game-Scotch Variation Accepted |
| 1 e4 e5 2 Nf3 Nc6 3 Nc3 Nf6 4 d4 exd4 5 Nd5 | C47 | King's Pawn-4 Knights Game-Scotch Variation Accepted-Belgrade Gambit |
| 1 e4 e5 2 Nf3 Nc6 3 Nc3 Nf6 4 d4 exd4 5 Nd5 Nxe4 6 Qe2 f5 | C47 | 4 Knights Game-Scotch Variation Accepted-Belgrade Gambit-Modern Defence |
| 1 e4 e5 2 Nf3 Nc6 3 Nc3 Nf6 4 d4 exd4 5 Nxd4 Bb4 6 Nxc6 bxc6 7 Bd3 d5 8 exd5 cxd5 9 0-0 0-0 10 Bg5 Be6 | C47 | 4 Knights Game-Scotch Variation Accepted-Paulsen Variation-Tarrasch Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Nc3 Nf6 4 d4 exd4 5 Nxd4 Bb4 6 Nxc6 bxc6 7 Bd3 d5 8 exd5 cxd5 9 0-0 0-0 10 Bg5 c6 11 Qf3 Be7 12 Rae1 | C47 | 4 Knights Game-Scotch Variation Accepted-Paulsen Variation-Löwenborg Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Nc3 Nf6 4 d4 exd4 5 Nxd4 Bb4 6 Nxc6 bxc6 7 Qd4 | C47 | King's Knight Opening-4 Knights Game-Scotch Variation Accepted-Paulsen Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Nc3 Nf6 4 d4 exd4 5 Nxd4 Bb4 6 Nxc6 bxc6 7 Qd4 Qe7 8 f3 c5 | C47 | 4 Knights Game-Scotch Variation Accepted-Paulsen Variation-Berger Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Nc3 Nf6 4 d4 exd4 5 Nxd4 Nxe4 | C47 | King's Knight Opening-4 Knights Game-Scotch Variation Accepted-Schmid Defence |
| 1 e4 e5 2 Nf3 Nc6 3 Nc3 Nf6 4 Nxe5 | C46 | King's Pawn-King's Knight Opening-4 Knights Game-Leipzig/Schultze-Mueller/Halloween Gambit |
| 1 e4 e5 2 Nf3 Nc6 3 Nc3 Nf6 4 Nxe5 Nxe5 5 d4 Nc6 (6 d5 Ne5 7 f4 Ng6 8 e5 Ng8 9 d6 cxd6 10 exd6 Qf6 11 Nb5 Rb8) | C46 | King's Knight Opening-4 Knights Game-Leipzig Gambit-Plasma Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Nc3 Nf6 4 Nxe5 Nxe5 5 d4 Ng6 6 e5 Ng8 7 Bc4 Bb4 8 Qf3 f5 | C46 | King's Knight Opening-4 Knights Game-Leipzig Gambit-Oltimer Variation |
| 1 e4 e5 2 Nf3 Nc6 3 Nxe5 Nxe5 4 d4 | C44 | King's Pawn-King's Knight Opening-Italian Game-Irish/Chicago/Schulze-Muller Gambit |
| 1 e4 e5 2 Nf3 Nf6 | C42 Explore | King's Pawn-King's Knight Opening-Petrov's Defence/Russian Game |
| 1 e4 e5 2 Nf3 Nf6 3 Bc4 | C42 | King's Pawn-King's Knight Opening-Petrov's Defence-Italian/Urusov Gambit |
| 1 e4 e5 2 Nf3 Nf6 3 Bc4 Nxe4 4 Nc3 | C42 | King's Knight Opening-Petrov's Defence-Italian Gambit-Boden Variation |
| 1 e4 e5 2 Nf3 Nf6 3 Bc4 Nxe4 4 Nc3 d5 | C42 | Petrov's Defence-Italian Gambit-Boden Variation-Lichtenhein Variation |
| 1 e4 e5 2 Nf3 Nf6 3 d3 | C42 | King's Pawn-King's Knight Opening-Petrov's Defence-Indian Variation |
| 1 e4 e5 2 Nf3 Nf6 3 d4 | C43 | King's Pawn-King's Knight Opening-Petrov's Defence-Modern/Steinitz Attack |
| 1 e4 e5 2 Nf3 Nf6 3 d4 d5 | C43 | King's Knight Opening-Petrov's Defence-Modern Attack-Symmetrical Variation |
| 1 e4 e5 2 Nf3 Nf6 3 d4 exd4 4 Bc4 | C43 | King's Knight Opening-Petrov's Defence-Modern Attack-Urusov/Suchting Gambit |
| 1 e4 e5 2 Nf3 Nf6 3 d4 exd4 4 e5 Ne4 5 Bb5 | C43 | King's Knight Opening-Petrov's Defence-Modern Attack-Tal Gambit |
| 1 e4 e5 2 Nf3 Nf6 3 d4 exd4 4 e5 Ne4 5 Qe2 | C43 | King's Knight Opening-Petrov's Defence-Modern Attack-Steinitz Variation |
| 1 e4 e5 2 Nf3 Nf6 3 d4 exd4 4 e5 Ne4 5 Qe2 Nc5 6 Nxd4 Nc6 | C43 | Petrov's Defence-Modern Attack-Steinitz Variation-Bardeleben Variation |
| 1 e4 e5 2 Nf3 Nf6 3 d4 exd4 4 e5 Ne4 5 Qxd4 | C43 | King's Knight Opening-Petrov's Defence-Modern Attack-Main Line/Centre Attack |
| 1 e4 e5 2 Nf3 Nf6 3 d4 Nxe4 | C43 | King's Knight Opening-Petrov's Defence-Modern Attack-Symmetrical Variation |
| 1 e4 e5 2 Nf3 Nf6 3 d4 Nxe4 4 Bd3 | C43 | Petrov's Defence-Modern Attack-Symmetrical Variation-Centre Variation |
| 1 e4 e5 2 Nf3 Nf6 3 d4 Nxe4 4 Bd3 d5 5 Nxe5 Bd6 6 0-0 0-0 7 c4 Bxe5 | C43 | Petrov's Defence-Symmetrical Variation-Centre Variation-Trifunovic Variation |
| 1 e4 e5 2 Nf3 Nf6 3 d4 Nxe4 4 Bd3 Nc6 | C43 | Petrov's Defence-Symmetrical Variation-Centre Variation-Murrey Variation |
| 1 e4 e5 2 Nf3 Nf6 3 Nc3 | C42 | King's Pawn-King's Knight Opening-Petrov's Defence-Petrov 3 Knights Game |
| 1 e4 e5 2 Nf3 Nf6 3 Nxe5 d6 4 Nc4 | C42 | King's Pawn-King's Knight Opening-Petrov's Defence-Paulsen Attack |
| 1 e4 e5 2 Nf3 Nf6 3 Nxe5 d6 4 Nd3 | C42 | King's Pawn-King's Knight Opening-Petrov's Defence-Karklins-Martinovsky Variation |
| 1 e4 e5 2 Nf3 Nf6 3 Nxe5 d6 4 Nf3 Nxe4 5 Bd3 | C42 | King's Pawn-King's Knight Opening-Petrov's Defence-Millennium Attack |
| 1 e4 e5 2 Nf3 Nf6 3 Nxe5 d6 4 Nf3 Nxe4 5 c4 | C42 | King's Pawn-King's Knight Opening-Petrov's Defence-Kaufmann Attack |
| 1 e4 e5 2 Nf3 Nf6 3 Nxe5 d6 4 Nf3 Nxe4 5 d3 | C42 | King's Pawn-King's Knight Opening-Petrov's Defence-French Attack |
| 1 e4 e5 2 Nf3 Nf6 3 Nxe5 d6 4 Nf3 Nxe4 5 d4 | C42 | King's Pawn-King's Knight Opening-Petrov's Defence-Classical Attack |
| 1 e4 e5 2 Nf3 Nf6 3 Nxe5 d6 4 Nf3 Nxe4 5 d4 d5 6 Bd3 Bd6 | C42 | King's Knight Opening-Petrov's Defence-Classical Attack-Marshall Variation |
| 1 e4 e5 2 Nf3 Nf6 3 Nxe5 d6 4 Nf3 Nxe4 5 d4 d5 6 Bd3 Bd6 7 0-0 0-0 8 c4 Bg4 | C42 | Petrov's Defence-Classical Attack-Marshall Variation-Tarrasch Variation |
| 1 e4 e5 2 Nf3 Nf6 3 Nxe5 d6 4 Nf3 Nxe4 5 d4 d5 6 Bd3 Bd6 7 0-0 0-0 8 c4 Bg4 9 cxd5 f5 10 Re1 Bxh2+ | C42 | Petrov's Defence-Marshall Variation-Tarrasch Variation-Marshall Trap |
| 1 e4 e5 2 Nf3 Nf6 3 Nxe5 d6 4 Nf3 Nxe4 5 d4 d5 6 Bd3 Bd6 7 0-0 0-0 8 c4 c6 | C42 | Petrov's Defence-Classical Attack-Marshall Variation-Staunton Variation |
| 1 e4 e5 2 Nf3 Nf6 3 Nxe5 d6 4 Nf3 Nxe4 5 d4 d5 6 Bd3 Bd6 7 0-0 0-0 8 c4 c6 9 Re1 Bg4 | C42 | Petrov's Defence-Marshall Variation-Staunton Variation-Chinese Gambit |
| 1 e4 e5 2 Nf3 Nf6 3 Nxe5 d6 4 Nf3 Nxe4 5 d4 d5 6 Bd3 Be7 7 0-0 0-0 | C42 | King's Knight Opening-Petrov's Defence-Classical Attack-Mason Variation |
| 1 e4 e5 2 Nf3 Nf6 3 Nxe5 d6 4 Nf3 Nxe4 5 d4 d5 6 Bd3 Be7 7 0-0 Nc6 8 c4 | C42 | King's Knight Opening-Petrov's Defence-Classical Attack-Jaenisch Variation |
| 1 e4 e5 2 Nf3 Nf6 3 Nxe5 d6 4 Nf3 Nxe4 5 d4 d5 6 Bd3 Be7 7 0-0 Nc6 8 c4 Nb4 9 Be2 | C42 | Petrov's Defence-Classical Attack-Jaenisch Variation-Main Line |
| 1 e4 e5 2 Nf3 Nf6 3 Nxe5 d6 4 Nf3 Nxe4 5 d4 d5 6 Bd3 Be7 7 0-0 Nc6 8 c4 Nb4 9 cxd5 | C42 | Petrov's Defence-Classical Attack-Jaenisch Variation-Browne Attack |
| 1 e4 e5 2 Nf3 Nf6 3 Nxe5 d6 4 Nf3 Nxe4 5 d4 d5 6 Bd3 Be7 7 0-0 Nc6 8 Re1 | C42 | King's Knight Opening-Petrov's Defence-Classical Attack-Lasker Variation |
| 1 e4 e5 2 Nf3 Nf6 3 Nxe5 d6 4 Nf3 Nxe4 5 d4 d5 6 Bd3 Be7 7 0-0 Nc6 8 Re1 Bg4 9 c3 f5 10 c4 | C42 | Petrov's Defence-Classical Attack-Lasker Variation-Krause Variation |
| 1 e4 e5 2 Nf3 Nf6 3 Nxe5 d6 4 Nf3 Nxe4 5 d4 d5 6 Bd3 Be7 7 0-0 Nc6 8 Re1 Bg4 9 c3 f5 10 c4 Bh4 | C42 | Petrov's Defence-Lasker Variation-Krause Variation-Maróczy Variation |
| 1 e4 e5 2 Nf3 Nf6 3 Nxe5 d6 4 Nf3 Nxe4 5 d4 d5 6 Bd3 Be7 7 0-0 Nc6 8 Re1 Bg4 9 c3 f5 (10 Nbd2) | C42 | Petrov's Defence-Classical Attack-Lasker Variation-Berger Variation |
| 1 e4 e5 2 Nf3 Nf6 3 Nxe5 d6 4 Nf3 Nxe4 5 d4 d5 6 Bd3 Be7 7 0-0 Nc6 8 Re1 Bg4 9 c4 | C42 | King's Knight Opening-Petrov's Defence-Classical Attack-Lasker Variation-Chigorin Variation |
| 1 e4 e5 2 Nf3 Nf6 3 Nxe5 d6 4 Nf3 Nxe4 5 d4 d5 6 Bd3 Nc6 | C42 | King's Knight Opening-Petrov's Defence-Classical Attack-Mason-Showalter Variation |
| 1 e4 e5 2 Nf3 Nf6 3 Nxe5 d6 4 Nf3 Nxe4 5 d4 Nf6 | C42 | King's Knight Opening-Petrov's Defence-Classical Attack-Closed Variation |
| 1 e4 e5 2 Nf3 Nf6 3 Nxe5 d6 4 Nf3 Nxe4 5 Nc3 | C42 | King's Pawn-King's Knight Opening-Petrov's Defence-Nimzowitsch Attack |
| 1 e4 e5 2 Nf3 Nf6 3 Nxe5 d6 4 Nf3 Nxe4 5 Qe2 | C42 | King's Pawn-King's Knight Opening-Petrov's Defence-Cozio/Lasker Attack |
| 1 e4 e5 2 Nf3 Nf6 3 Nxe5 d6 4 Nxf7 | C42 | King's Pawn-King's Knight Opening-Petrov's Defence-Cochrane Gambit |
| 1 e4 e5 2 Nf3 Nf6 3 Nxe5 d6 4 Nxf7 Kxf7 5 Bc4+ | C42 | King's Knight Opening-Petrov's Defence-Cochrane Gambit-Bishop Check Line |
| 1 e4 e5 2 Nf3 Nf6 3 Nxe5 d6 4 Nxf7 Kxf7 5 d4 | C42 | King's Knight Opening-Petrov's Defence-Cochrane Gambit-Centre Variation |
| 1 e4 e5 2 Nf3 Nf6 3 Nxe5 Nc6 | C42 | King's Pawn-King's Knight Opening-Petrov's Defence-Stafford Gambit |
| 1 e4 e5 2 Nf3 Nf6 3 Nxe5 Nxe4 | C42 | King's Pawn-King's Knight Opening-Petrov's Defence-Damiano Variation |
| 1 e4 e5 2 Nf3 Nf6 3 Nxe5 Nxe4 4 Qe2 Qe7 | C42 | King's Knight Opening-Petrov's Defence-Damiano Variation-Kholmov Gambit |
| 1 e4 e5 2 Nf3 Nf6 3 Nxe5 Qe7 | C42 | King's Pawn-King's Knight Opening-Petrov's Defence-López Variation |
| 1 e4 e5 2 Nf3 Nf6 3 Qe2 Nc6 4 d4 | C42 | King's Pawn-King's Knight Opening-Petrov's Defence-Moody Gambit |
| 1 e4 e5 2 Nf3 Qe7 | C40 Explore | King's Pawn-King's Knight Opening-Gunderam/Brazilian Defence |
| 1 e4 e5 2 Nf3 Qe7 3 Bc4 f5 | C40 | King's Pawn-King's Knight Opening-Gunderam Defence-Gunderam Gambit |
| 1 e4 e5 2 Nf3 Qf6 | C40 Explore | King's Pawn-King's Knight Opening-Greco/McConnell Defence |
| 1 e4 e5 2 Nf3 Qf6 3 Bc4 Qg6 4 0-0 | C40 | King's Pawn-King's Knight Opening-Greco Defence-LaBourdonnais Gambit |
| 1 e4 e5 2 Qe2 | C20 Explore | King's Pawn-Mueller Opening |
| 1 e4 e5 2 Qe2 Nc6 3 c3 Nf6 4 Nf3 Bc5 5 d4 exd4 6 cxd4 Nxd4 | C20 | King's Pawn-Van Hooydoon Gambit |
| 1 e4 e5 2 Qf3 | C20 Explore | King's Pawn-Napoleon's Attack |
| 1 e4 e5 2 Qg4 Nf6 3 Qf5 | C20 | King's Pawn-Speers Opening |
| 1 e4 e5 2 Qh5 | C20 Explore | King's Pawn-Patzer Opening/Parham/Wayward Queen Attack |
| 1 e4 e5 2 Qh5 Nc6 3 Bc4 Nh6 4 d3 g6 5 Qf3 f6 6 Ne2 d5 | C20 | King's Pawn-Wayward Queen Attack-Mellon Gambit |
| 1 e4 e5 2 Qh5 Nf6 | C20 | King's Pawn-Wayward Queen Attack-Kiddie Countergambit |
| 1 e4 e6 | C00 Explore | King's Pawn-French Defence |
| 1 e4 e6 2 b3 | C00 Explore | King's Pawn-French Defence-Réti/Spielmann/Horwitz Attack |
| 1 e4 e6 2 b3 d5 3 Bb2 | C00 | King's Pawn-French Defence-Réti Attack-Papa-Ticulat Gambit |
| 1 e4 e6 2 b4 | C00 Explore | King's Pawn-French Defence-Banzai-Leong Gambit |
| 1 e4 e6 2 b4 Bxb4 3 e5 | C00 | King's Pawn-French Defence-Banzai-Leong Gambit-Pinova Gambit |
| 1 e4 e6 2 Bb5 | C00 Explore | King's Pawn-French Defence-Bird Invitation |
| 1 e4 e6 2 c4 | C00 Explore | King's Pawn-French Defence-Steiner Variation |
| 1 e4 e6 2 c4 d5 3 cxd5 exd5 4 Qb3 | C00 | King's Pawn-French Defence-Steiner Variation-Orthoschnapp Gambit |
| 1 e4 e6 2 d3 | C00 Explore | King's Pawn-French Defence-Hanham/King's Indian Attack |
| 1 e4 e6 2 d3 d5 3 Nd2 Nf6 4 Ngf3 Nc6 5 Be2 | C00 | King's Pawn-French Defence-Hanham Attack-Reversed Philidor Formation |
| 1 e4 e6 2 d3 f5 | C00 Explore | King's Pawn-French Defence-Hanham Attack-Franco-Hiva Gambit III |
| 1 e4 e6 2 d4 | C01 Explore | King's Pawn-French Defence-Normal Variation |
| 1 e4 e6 2 d4 a6 | C01 Explore | King's Pawn-French Defence-Normal Variation-St. George Variation |
| 1 e4 e6 2 d4 a6 3 c4 b5 4 cxb5 axb5 5 Bxb5 | C01 | French Defence-Normal Variation-St. George Variation-St. George Gambit |
| 1 e4 e6 2 d4 b5 | C01 Explore | King's Pawn-French Defence-Normal Variation-Baeuerle Gambit |
| 1 e4 e6 2 d4 c5 | C01 Explore | King's Pawn-French Defence-Normal Variation-Franco-Benoni/Franco-Sicilian Defence |
| 1 e4 e6 2 d4 d5 | C01 Explore | King's Pawn-French Defence-Normal Variation-Classical Variation |
| 1 e4 e6 2 d4 d5 3 Bd3 | C01 Explore | French Defence-Normal Variation-Classical Variation-Schlechter Variation |
| 1 e4 e6 2 d4 d5 3 Be3 | C01 Explore | French Defence-Normal Variation-Classical Variation-Alapin Gambit |
| 1 e4 e6 2 d4 d5 3 c4 (dxe4) | C01 | French Defence-Normal Variation-Classical Variation-Diemer-Duhm Gambit |
| 1 e4 e6 2 d4 d5 3 e5 | C02 Explore | French Defence-Normal Variation-Classical Variation-Advance Variation |
| 1 e4 e6 2 d4 d5 3 e5 Bd7 | C02 | French Defence-Classical Variation-Advance Variation-Extended Bishop Swap |
| 1 e4 e6 2 d4 d5 3 e5 c5 4 b4 | C02 | French Defence-Classical Variation-Advance Variation-Frenkel Gambit |
| 1 e4 e6 2 d4 d5 3 e5 c5 4 c3 Nc6 5 Nf3 | C02 | French Defence-Classical Variation-Advance Variation-Paulsen Attack |
| 1 e4 e6 2 d4 d5 3 e5 c5 4 c3 Nc6 5 Nf3 Bd7 | C02 | French Defence-Advance Variation-Paulsen Attack-Euwe Variation |
| 1 e4 e6 2 d4 d5 3 e5 c5 4 c3 Nc6 5 Nf3 Qb6 6 a3 | C02 | French Defence-Classical Variation-Advance Variation-Main Line |
| 1 e4 e6 2 d4 d5 3 e5 c5 4 c3 Nc6 5 Nf3 Qb6 6 a3 Nh6 | C02 | French Defence-Advance Variation-Main Line-Lputian Variation |
| 1 e4 e6 2 d4 d5 3 e5 c5 4 c3 Nc6 5 Nf3 Qb6 6 Bd3 | C02 | French Defence-Advance Variation-Paulsen Attack-Milner-Barry Gambit |
| 1 e4 e6 2 d4 d5 3 e5 c5 4 c3 Qb6 5 Nf3 Bd7 | C02 | French Defence-Classical Variation-Advance Variation-Wade Variation |
| 1 e4 e6 2 d4 d5 3 e5 c5 4 dxc5 | C02 | French Defence-Classical Variation-Advance Variation-Steinitz Variation |
| 1 e4 e6 2 d4 d5 3 e5 c5 4 Nf3 | C02 | French Defence-Classical Variation-Advance Variation-Nimzowitsch System |
| 1 e4 e6 2 d4 d5 3 e5 c5 4 Nf3 cxd4 5 Bd3 | C02 | French Defence-Advance Variation-Nimzowitsch System-Ruisdonk Gambit |
| 1 e4 e6 2 d4 d5 3 e5 c5 4 Qg4 | C02 | French Defence-Classical Variation-Advance Variation-Nimzowitsch Attack |
| 1 e4 e6 2 d4 d5 3 e5 c5 4 Qg4 cxd4 5 Nf3 | C02 | French Defence-Advance Variation-Nimzowitsch Attack-Nimzowitsch Gambit |
| 1 e4 e6 2 d4 d5 3 exd5 | C01 Explore | French Defence-Normal Variation-Classical Variation-Exchange Variation |
| 1 e4 e6 2 d4 d5 3 exd5 exd5 4 c4 | C01 | French Defence-Classical Variation-Exchange Variation-Monte Carlo Variation |
| 1 e4 e6 2 d4 d5 3 exd5 exd5 4 Nc3 Bb4 5 Bd3 Ne7 | C01 | French Defence-Classical Variation-Exchange Variation-Canal Variation |
| 1 e4 e6 2 d4 d5 3 exd5 exd5 4 Nc3 Nf6 (5 Bg5) | C01 | French Defence-Classical Variation-Exchange Variation-Svenonius Variation |
| 1 e4 e6 2 d4 d5 3 exd5 exd5 4 Nc3 Nf6 5 Bg5 Nc6 | C01 | French Defence-Exchange Variation-Svenonius Variation-Bogolyubov Variation |
| 1 e4 e6 2 d4 d5 3 Nc3 | C10 Explore | French Defence-Normal Variation-Classical Variation-Paulsen Attack |
| 1 e4 e6 2 d4 d5 3 Nc3 Bb4 | C15 Explore | French Defence-Classical Variation-Paulsen Attack-Winawer/Nimzowitsch Variation |
| 1 e4 e6 2 d4 d5 3 Nc3 Bb4 4 a3 | C15 | French Defence-Paulsen Attack-Winawer Variation-Winckelmann-Riemer Gambit |
| 1 e4 e6 2 d4 d5 3 Nc3 Bb4 4 Bd2 | C15 | French Defence-Paulsen Attack-Winawer Variation-Fingerslip Variation |
| 1 e4 e6 2 d4 d5 3 Nc3 Bb4 4 Bd2 dxe4 5 Qg4 Nf6 6 Qxg7 Rg8 7 Qh6 | C15 | French Defence-Winawer Variation-Fingerslip Variation-Main Line |
| 1 e4 e6 2 d4 d5 3 Nc3 Bb4 4 Bd2 dxe4 5 Qg4 Qxd4 | C15 | French Defence-Winawer Variation-Fingerslip Variation-Kunin Double Gambit |
| 1 e4 e6 2 d4 d5 3 Nc3 Bb4 4 Bd2 Ne7 5 Nb1 | C15 | French Defence-Winawer Variation-Fingerslip Variation-Schwarz's Line |
| 1 e4 e6 2 d4 d5 3 Nc3 Bb4 4 Bd3 c5 5 exd5 Qxd5 6 Bd2 | C15 | French Defence-Paulsen Attack-Winawer Variation-Kondratiyev Variation |
| 1 e4 e6 2 d4 d5 3 Nc3 Bb4 4 e5 | C16 | French Defence-Paulsen Attack-Winawer Variation-Advance Variation |
| 1 e4 e6 2 d4 d5 3 Nc3 Bb4 4 e5 c5 | C17 | French Defence-Paulsen Attack-Winawer Variation-Advance Variation |
| 1 e4 e6 2 d4 d5 3 Nc3 Bb4 4 e5 c5 5 a3 Ba5 | C18 | French Defence-Winawer Variation-Advance Variation-Retreat Variation |
| 1 e4 e6 2 d4 d5 3 Nc3 Bb4 4 e5 c5 5 a3 Ba5 6 b4 cxd4 | C18 | French Defence-Winawer Variation-Retreat Variation-Armenian Line |
| 1 e4 e6 2 d4 d5 3 Nc3 Bb4 4 e5 c5 5 a3 Bxc3+ 6 bxc3 | C18 | French Defence-Paulsen Attack-Winawer Variation-Advance Variation |
| 1 e4 e6 2 d4 d5 3 Nc3 Bb4 4 e5 c5 5 a3 Bxc3+ 6 bxc3 Ne7 | C19 | French Defence-Paulsen Attack-Winawer Variation-Advance Variation |
| 1 e4 e6 2 d4 d5 3 Nc3 Bb4 4 e5 c5 5 a3 Bxc3+ 6 bxc3 Ne7 7 a4 | C19 | French Defence-Winawer Variation-Advance Variation-Smyslov Variation |
| 1 e4 e6 2 d4 d5 3 Nc3 Bb4 4 e5 c5 5 a3 Bxc3+ 6 bxc3 Ne7 7 Nf3 | C19 | French Defence-Winawer Variation-Advance Variation-Positional Main Line |
| 1 e4 e6 2 d4 d5 3 Nc3 Bb4 4 e5 c5 5 a3 Bxc3+ 6 bxc3 Ne7 7 Qg4 | C19 | French Defence-Winawer Variation-Advance Variation-Poisoned Pawn Variation |
| 1 e4 e6 2 d4 d5 3 Nc3 Bb4 4 e5 c5 5 a3 Bxc3+ 6 bxc3 Ne7 7 Qg4 Qc7 8 Qxg7 Rg8 9 Qxh7 cxd4 10 Kd1 | C19 | French Defence-Winawer Variation-Poisoned Pawn Variation-Euwe-Gligoric/Paoli Variation |
| 1 e4 e6 2 d4 d5 3 Nc3 Bb4 4 e5 c5 5 a3 Bxc3+ 6 bxc3 Ne7 7 Qg4 Qc7 8 Qxg7 Rg8 9 Qxh7 cxd4 10 Ne2 | C19 | French Defence-Winawer Variation-Poisoned Pawn Variation-Konstantinopolsky/Main Variation |
| 1 e4 e6 2 d4 d5 3 Nc3 Bb4 4 e5 c5 5 a3 Bxc3+ 6 bxc3 Qc7 | C18 | French Defence-Winawer Variation-Advance Variation-Classical Variation |
| 1 e4 e6 2 d4 d5 3 Nc3 Bb4 4 e5 c5 5 a3 cxd4 6 axb4 dxc3 | C18 | French Defence-Winawer Variation-Advance Variation-Maroczy-Wallis Variation |
| 1 e4 e6 2 d4 d5 3 Nc3 Bb4 4 e5 c5 5 a3 cxd4 6 axb4 dxc3 7 Nf3 | C17 | French Defence-Winawer Variation-Maroczy-Wallis Variation-Rauzer Variation |
| 1 e4 e6 2 d4 d5 3 Nc3 Bb4 4 e5 c5 5 Bd2 | C17 | French Defence-Winawer Variation-Advance Variation-Bogoljubov Variation |
| 1 e4 e6 2 d4 d5 3 Nc3 Bb4 4 e5 c5 5 Bd2 Ne7 6 f4 | C17 | French Defence-Winawer Variation-Bogoljubov Variation-Icelandic Defence |
| 1 e4 e6 2 d4 d5 3 Nc3 Bb4 4 e5 c5 5 Qg4 | C17 | French Defence-Winawer Variation-Advance Variation-Russian/Moscow Variation |
| 1 e4 e6 2 d4 d5 3 Nc3 Bb4 4 e5 Qd7 | C16 | French Defence-Winawer Variation-Advance Variation-Petrosian Variation |
| 1 e4 e6 2 d4 d5 3 Nc3 Bb4 4 exd5 | C15 | French Defence-Paulsen Attack-Winawer Variation-Delayed Exchange Variation |
| 1 e4 e6 2 d4 d5 3 Nc3 Bb4 4 exd5 exd5 5 Bd3 Ne7 6 Qh5 | C15 | French Defence-Winawer Variation-Delayed Exchange Variation-Canal Attack |
| 1 e4 e6 2 d4 d5 3 Nc3 Bb4 4 Nge2 | C15 | French Defence-Paulsen Attack-Winawer Variation-Alekhine-Maróczy Gambit |
| 1 e4 e6 2 d4 d5 3 Nc3 Bb4 4 Nge2 dxe4 5 a3 Be7 6 Nxe4 Nc6 7 g4 | C15 | French Defence-Winawer Variation-Alekhine-Maróczy Gambit-Alekhine Variation |
| 1 e4 e6 2 d4 d5 3 Nc3 Bb4 4 Nge2 dxe4 5 a3 Be7 6 Nxe4 Nf6 7 N2g3 0-0 8 Be2 Nc6 | C15 | French Defence-Winawer Variation-Alekhine Gambit-Alatortsev Variation |
| 1 e4 e6 2 d4 d5 3 Nc3 Bb4 4 Nge2 dxe4 5 a3 Bxc3+ | C15 | French Defence-Paulsen Attack-Winawer Variation-Alekhine-Maroczy Gambit Accepted/Alekhine Gambit |
| 1 e4 e6 2 d4 d5 3 Nc3 Bb4 4 Nge2 dxe4 5 a3 Bxc3+ 6 Nxc3 Nc6 | C15 | French Defence-Winawer Variation-Alekhine-Maroczy Gambit Accepted-Kan Variation |
| 1 e4 e6 2 d4 d5 3 Nc3 c5 | C10 Explore | French Defence-Classical Variation-Paulsen Attack-Marshall Variation |
| 1 e4 e6 2 d4 d5 3 Nc3 dxe4 | C10 Explore | French Defence-Classical Variation-Paulsen Attack-Rubinstein Variation |
| 1 e4 e6 2 d4 d5 3 Nc3 dxe4 4 Nxe4 Bd7 5 Nf3 Bc6 | C10 | French Defence-Paulsen Attack-Rubinstein Variation-Fort Knox Variation |
| 1 e4 e6 2 d4 d5 3 Nc3 dxe4 4 Nxe4 Bd7 5 Nf3 Ngf6 | C10 | French Defence-Paulsen Attack-Rubinstein Variation-Capablanca Variation |
| 1 e4 e6 2 d4 d5 3 Nc3 dxe4 4 Nxe4 e5 | C10 | French Defence-Paulsen Attack-Rubinstein Variation-Ellis Gambit |
| 1 e4 e6 2 d4 d5 3 Nc3 dxe4 4 Nxe4 Nd7 | C10 | French Defence-Paulsen Attack-Rubinstein Variation-Blackburne Defence |
| 1 e4 e6 2 d4 d5 3 Nc3 dxe4 4 Nxe4 Nd7 5 Nf3 Ngf6 6 Nxf6+ Nxf6 7 Ne5 | C10 | French Defence-Rubinstein Variation-Blackburne Defence-Capablanca Line |
| 1 e4 e6 2 d4 d5 3 Nc3 dxe4 4 Nxe4 Qd5 | C10 | French Defence-Paulsen Attack-Rubinstein Variation-Frere/Becker/Maric Variation |
| 1 e4 e6 2 d4 d5 3 Nc3 Nc6 4 exd5 | C10 | French Defence-Classical Variation-Paulsen Attack-Svenonius Variation |
| 1 e4 e6 2 d4 d5 3 Nc3 Nf6 | C11 Explore | French Defence-Normal Variation-Classical Variation-Paulsen Attack |
| 1 e4 e6 2 d4 d5 3 Nc3 Nf6 4 Bd3 | C11 Explore | French Defence-Classical Variation-Paulsen Attack-Swiss Variation |
| 1 e4 e6 2 d4 d5 3 Nc3 Nf6 4 Be3 | C11 Explore | French Defence-Classical Variation-Paulsen Attack-Henneberger Variation |
| 1 e4 e6 2 d4 d5 3 Nc3 Nf6 4 Bg5 Bb4 | C12 Explore | French Defence-Classical Variation-Paulsen Attack-MacCutcheon Variation |
| 1 e4 e6 2 d4 d5 3 Nc3 Nf6 4 Bg5 Bb4 5 e5 | C12 | French Defence-Paulsen Attack-MacCutcheon Variation-Advance Variation |
| 1 e4 e6 2 d4 d5 3 Nc3 Nf6 4 Bg5 Bb4 5 e5 h6 6 Bc1 | C12 | French Defence-MacCutcheon Variation-Advance Variation-Dr. Olland/Dutch Variation |
| 1 e4 e6 2 d4 d5 3 Nc3 Nf6 4 Bg5 Bb4 5 e5 h6 6 Bd2 (Bxc3) | C12 | French Defence-MacCutcheon Variation-Advance Variation-Lasker Variation |
| 1 e4 e6 2 d4 d5 3 Nc3 Nf6 4 Bg5 Bb4 5 e5 h6 6 Bd2 Bxc3 7 bxc3 Ne4 8 Qg4 Kf8 9 Bc1 | C12 | French Defence-MacCutcheon Variation-Lasker Variation-Duras Variation |
| 1 e4 e6 2 d4 d5 3 Nc3 Nf6 4 Bg5 Bb4 5 e5 h6 6 Bd2 Nfd7 | C12 | French Defence-MacCutcheon Variation-Advance Variation-Tartakower Variation |
| 1 e4 e6 2 d4 d5 3 Nc3 Nf6 4 Bg5 Bb4 5 e5 h6 6 Be3 | C12 | French Defence-MacCutcheon Variation-Advance Variation-Janowski Variation |
| 1 e4 e6 2 d4 d5 3 Nc3 Nf6 4 Bg5 Bb4 5 e5 h6 6 Bh4 | C12 | French Defence-MacCutcheon Variation-Advance Variation-Bernstein Variation |
| 1 e4 e6 2 d4 d5 3 Nc3 Nf6 4 Bg5 Bb4 5 e5 h6 6 exf6 | C12 | French Defence-MacCutcheon Variation-Advance Variation-Chigorin Variation |
| 1 e4 e6 2 d4 d5 3 Nc3 Nf6 4 Bg5 Bb4 5 e5 h6 6 exf6 hxg5 7 fxg7 Rg8 8 h4 gxh4 9 Qg4 | C12 | French Defence-MacCutcheon-Chigorin Variation-Grigoriev Variation |
| 1 e4 e6 2 d4 d5 3 Nc3 Nf6 4 Bg5 Bb4 5 exd5 | C12 | French Defence-Paulsen Attack-MacCutcheon Variation-Exchange Variation |
| 1 e4 e6 2 d4 d5 3 Nc3 Nf6 4 Bg5 Bb4 5 exd5 Qxd5 6 Bxf6 gxf6 7 Qd2 Qa5 | C12 | French Defence-MacCutcheon Variation-Exchange Variation-Bogolyubov Variation |
| 1 e4 e6 2 d4 d5 3 Nc3 Nf6 4 Bg5 Bb4 5 Ne2 | C12 | French Defence-Paulsen Attack-MacCutcheon Variation-Wolf Gambit |
| 1 e4 e6 2 d4 d5 3 Nc3 Nf6 4 Bg5 Be7 | C13 Explore | French Defence-Normal Variation-Classical Variation-Paulsen Attack |
| 1 e4 e6 2 d4 d5 3 Nc3 Nf6 4 Bg5 Be7 5 Bxf6 | C13 Explore | French Defence-Classical Variation-Paulsen Attack-Anderssen Attack |
| 1 e4 e6 2 d4 d5 3 Nc3 Nf6 4 Bg5 Be7 5 Bxf6 Bxf6 6 e5 Be7 7 Qg4 | C13 | French Defence-Paulsen Attack-Anderssen Attack-Richter Attack |
| 1 e4 e6 2 d4 d5 3 Nc3 Nf6 4 Bg5 Be7 5 e5 Ne4 | C13 | French Defence-Classical Variation-Paulsen Attack-Tartakower Variation |
| 1 e4 e6 2 d4 d5 3 Nc3 Nf6 4 Bg5 Be7 5 e5 Nfd7 6 Bxe7 (Qxe7) | C14 | French Defence-Normal Variation-Classical Variation-Paulsen Attack |
| 1 e4 e6 2 d4 d5 3 Nc3 Nf6 4 Bg5 Be7 5 e5 Nfd7 6 Bxe7 Qxe7 7 Bd3 | C14 | French Defence-Classical Variation-Paulsen Attack-Tarrasch Variation |
| 1 e4 e6 2 d4 d5 3 Nc3 Nf6 4 Bg5 Be7 5 e5 Nfd7 6 Bxe7 Qxe7 7 f4 | C14 | French Defence-Classical Variation-Paulsen Attack-Steinitz Variation |
| 1 e4 e6 2 d4 d5 3 Nc3 Nf6 4 Bg5 Be7 5 e5 Nfd7 6 Bxe7 Qxe7 7 f4 0-0 8 Nf3 c5 9 Qd2 Nc6 10 0-0-0 c4 | C14 | French Defence-Paulsen Attack-Steinitz Variation-Stahlberg Variation |
| 1 e4 e6 2 d4 d5 3 Nc3 Nf6 4 Bg5 Be7 5 e5 Nfd7 6 Bxe7 Qxe7 7 Nb5 | C14 | French Defence-Classical Variation-Paulsen Attack-Alapin Variation |
| 1 e4 e6 2 d4 d5 3 Nc3 Nf6 4 Bg5 Be7 5 e5 Nfd7 6 Bxe7 Qxe7 7 Qd2 | C14 | French Defence-Classical Variation-Paulsen Attack-Rubinstein Variation |
| 1 e4 e6 2 d4 d5 3 Nc3 Nf6 4 Bg5 Be7 5 e5 Nfd7 6 Bxe7 Qxe7 7 Qd2 0-0 8 f4 c5 9 Nf3 Nc6 10 0-0-0 c4 | C14 | French Defence-Paulsen Attack-Rubinstein Variation-Ståhlberg Variation |
| 1 e4 e6 2 d4 d5 3 Nc3 Nf6 4 Bg5 Be7 5 e5 Nfd7 6 Bxe7 Qxe7 7 Qg4 | C14 | French Defence-Classical Variation-Paulsen Attack-Pollock Variation |
| 1 e4 e6 2 d4 d5 3 Nc3 Nf6 4 Bg5 Be7 5 e5 Nfd7 6 h4 | C13 | French Defence-Classical Variation-Paulsen Attack-Albin-Alekhine-Chatard Attack |
| 1 e4 e6 2 d4 d5 3 Nc3 Nf6 4 Bg5 Be7 5 e5 Nfd7 6 h4 0-0 | C13 | French Defence-Paulsen Attack-Albin-Alekhine-Chatard Attack-Spielmann Variation |
| 1 e4 e6 2 d4 d5 3 Nc3 Nf6 4 Bg5 Be7 5 e5 Nfd7 6 h4 a6 | C13 | French Defence-Paulsen Attack-Albin-Alekhine-Chatard Attack-Maróczy Variation |
| 1 e4 e6 2 d4 d5 3 Nc3 Nf6 4 Bg5 Be7 5 e5 Nfd7 6 h4 Bxg5 7 hxg5 Qxg5 | C13 | French Defence-Paulsen Attack-Albin-Alekhine-Chatard Attack-Albin-Chatard Gambit |
| 1 e4 e6 2 d4 d5 3 Nc3 Nf6 4 Bg5 Be7 5 e5 Nfd7 6 h4 c5 | C13 | French Defence-Paulsen Attack-Albin-Alekhine-Chatard Attack-Breyer Variation |
| 1 e4 e6 2 d4 d5 3 Nc3 Nf6 4 Bg5 Be7 5 e5 Nfd7 6 h4 f6 | C13 | French Defence-Paulsen Attack-Albin-Alekhine-Chatard Attack-Teichmann Variation |
| 1 e4 e6 2 d4 d5 3 Nc3 Nf6 4 Bg5 Be7 5 e5 Ng8 | C13 | French Defence-Classical Variation-Paulsen Attack-Vistaneckis/Nimzowitsch/Vistaneskis Variation |
| 1 e4 e6 2 d4 d5 3 Nc3 Nf6 4 Bg5 Be7 5 e5 Ng8 6 Be3 b6 | C13 | French Defence-Paulsen Attack-Vistaneckis Variation-Frankfurt Variation |
| 1 e4 e6 2 d4 d5 3 Nc3 Nf6 4 Bg5 dxe4 | C11 Explore | French Defence-Classical Variation-Paulsen Attack-Burn Variation |
| 1 e4 e6 2 d4 d5 3 Nc3 Nf6 4 Bg5 dxe4 5 Nxe4 Be7 6 Bxf6 Bxf6 7 Nf3 0-0 | C11 | French Defence-Paulsen Attack-Burn Variation-Main Line |
| 1 e4 e6 2 d4 d5 3 Nc3 Nf6 4 Bg5 dxe4 5 Nxe4 Be7 6 Bxf6 gxf6 | C11 | French Defence-Paulsen Attack-Burn Variation-Morozevich Line |
| 1 e4 e6 2 d4 d5 3 Nc3 Nf6 4 e5 | C11 Explore | French Defence-Classical Variation-Paulsen Attack-Steinitz Variation |
| 1 e4 e6 2 d4 d5 3 Nc3 Nf6 4 e5 Nfd7 5 f4 c5 6 dxc5 Bxc5 7 Qg4 | C11 | French Defence-Paulsen Attack-Steinitz Variation-Bradford Attack |
| 1 e4 e6 2 d4 d5 3 Nc3 Nf6 4 e5 Nfd7 5 f4 c5 6 dxc5 Nc6 7 a3 Bxc5 8 Qg4 0-0 9 Nf3 f6 | C11 | French Defence-Paulsen Attack-Steinitz Variation-Brodsky-Jones Variation |
| 1 e4 e6 2 d4 d5 3 Nc3 Nf6 4 e5 Nfd7 5 f4 c5 6 Nf3 Nc6 7 Be3 | C11 | French Defence-Paulsen Attack-Steinitz Variation-Boleslavsky Variation |
| 1 e4 e6 2 d4 d5 3 Nc3 Nf6 4 e5 Nfd7 5 Qg4 | C11 | French Defence-Paulsen Attack-Steinitz Variation-Gledhill Attack |
| 1 e4 e6 2 d4 d5 3 Nc3 Nf6 4 exd5 | C11 Explore | French Defence-Classical Variation-Paulsen Attack-Delayed Exchange/Svenonius Variation |
| 1 e4 e6 2 d4 d5 3 Nd2 | C03 Explore | French Defence-Normal Variation-Classical Variation-Tarrasch Variation |
| 1 e4 e6 2 d4 d5 3 Nd2 a6 | C03 | French Defence-Classical Variation-Tarrasch Variation-Modern System |
| 1 e4 e6 2 d4 d5 3 Nd2 Be7 | C03 | French Defence-Classical Variation-Tarrasch Variation-Morozevich Variation |
| 1 e4 e6 2 d4 d5 3 Nd2 c5 | C07 | French Defence-Classical Variation-Tarrasch Variation-Open System |
| 1 e4 e6 2 d4 d5 3 Nd2 c5 4 c3 | C07 | French Defence-Tarrasch Variation-Open System-Suechting Line |
| 1 e4 e6 2 d4 d5 3 Nd2 c5 4 exd5 exd5 | C08 | French Defence-Tarrasch Variation-Open System-Exchange Variation |
| 1 e4 e6 2 d4 d5 3 Nd2 c5 4 exd5 exd5 5 Ngf3 c4 | C08 | French Defence-Open System-Exchange Variation-Advance Line |
| 1 e4 e6 2 d4 d5 3 Nd2 c5 4 exd5 exd5 5 Ngf3 Nc6 | C09 | French Defence-Open System-Exchange Variation-Main Line |
| 1 e4 e6 2 d4 d5 3 Nd2 c5 4 exd5 Nf6 | C07 | French Defence-Tarrasch Variation-Open System-Shaposhnikov Gambit |
| 1 e4 e6 2 d4 d5 3 Nd2 c5 4 exd5 Qxd5 | C07 | French Defence-Tarrasch Variation-Open System-Chistyakov Defence |
| 1 e4 e6 2 d4 d5 3 Nd2 c5 4 exd5 Qxd5 5 Ngf3 cxd4 6 Bc4 Qd6 7 0-0 Nf6 8 Nb3 Nc6 9 Nbxd4 Nxd4 10 Nxd4 a6 | C07 | French Defence-Open System-Chistyakov Defence-Modern Line |
| 1 e4 e6 2 d4 d5 3 Nd2 c5 4 exd5 Qxd5 5 Ngf3 cxd4 6 Bc4 Qd8 | C07 | French Defence-Open System-Chistyakov Defence-Eliskases Variation |
| 1 e4 e6 2 d4 d5 3 Nd2 c5 4 Ngf3 | C07 | French Defence-Tarrasch Variation-Open System-Euwe-Keres Line |
| 1 e4 e6 2 d4 d5 3 Nd2 f5 | C03 | French Defence-Classical Variation-Tarrasch Variation-Haberditz Variation |
| 1 e4 e6 2 d4 d5 3 Nd2 Nc6 | C03/C04 | French Defence-Classical Variation-Tarrasch Variation-Guimard Defence |
| 1 e4 e6 2 d4 d5 3 Nd2 Nc6 4 c3 dxe4 5 Nxe4 e5 | C03 | French Defence-Tarrasch Variation-Guimard Defence-Thunderbunny Variation |
| 1 e4 e6 2 d4 d5 3 Nd2 Nc6 4 Ngf3 Nf6 | C04 | French Defence-Tarrasch Variation-Guimard Defence-Main/Byrne Line |
| 1 e4 e6 2 d4 d5 3 Nd2 Nf6 | C05 | French Defence-Classical Variation-Tarrasch Variation-Closed Variation |
| 1 e4 e6 2 d4 d5 3 Nd2 Nf6 4 e5 Nfd7 5 Bd3 c5 6 c3 b6 | C05 | French Defence-Tarrasch Variation-Closed Variation-Botvinnik Variation |
| 1 e4 e6 2 d4 d5 3 Nd2 Nf6 4 e5 Nfd7 5 Bd3 c5 6 c3 Nc6 7 Ne2 cxd4 8 cxd4 | C06 | French Defence-Tarrasch Variation-Closed Variation-Main Line |
| 1 e4 e6 2 d4 d5 3 Nd2 Nf6 4 e5 Nfd7 5 Bd3 c5 6 c3 Nc6 7 Ne2 cxd4 8 cxd4 Nb6 | C06 | French Defence-Closed Variation-Main Line-Leningrad/Russian Variation |
| 1 e4 e6 2 d4 d5 3 Nd2 Nf6 4 e5 Nfd7 5 f4 | C05 | French Defence-Tarrasch Variation-Closed Variation-Pawn Centre Variation |
| 1 e4 e6 2 d4 d5 3 Nd2 Nf6 4 e5 Nfd7 5 f4 c5 6 c3 Nc6 7 Ndf3 cxd4 8 cxd4 Nb6 | C05 | French Defence-Closed Variation-Pawn Centre Variation-Leningrad Variation |
| 1 e4 e6 2 d4 d5 3 Nf3 | C01 Explore | French Defence-Normal Variation-Classical Variation-Perseus Gambit |
| 1 e4 e6 2 d4 d5 3 Nf3 dxe4 4 Ne5 | C01 | French Defence-Classical Variation-Perseus Gambit-Carlson Gambit |
| 1 e4 e6 2 d4 d5 3 Nh3 | C01 Explore | French Defence-Normal Variation-Classical Variation-Morphy Gambit |
| 1 e4 e6 2 d4 d5 3 Qe2 e5 4 f4 exf4 | C01 | French Defence-Normal Variation-Classical Variation-Hoffmann Gambit |
| 1 e4 e6 2 d4 d6 | C01 Explore | King's Pawn-French Defence-Normal Variation-Lengfellner System |
| 1 e4 e6 2 d4 f5 | C01 Explore | King's Pawn-French Defence-Normal Variation-Franco-Hiva Gambit I |
| 1 e4 e6 2 d4 f5 3 exf5 Nf6 | C01 | King's Pawn-French Defence-Normal Variation-Franco-Hiva Gambit I Accepted |
| 1 e4 e6 2 d4 Nf6 | C01 Explore | King's Pawn-French Defence-Normal Variation-Mediterranean Defence |
| 1 e4 e6 2 e5 | C00 Explore | King's Pawn-French Defence-Steinitz Attack |
| 1 e4 e6 2 f4 | C00 Explore | King's Pawn-French Defence-La Bourdonnais Variation |
| 1 e4 e6 2 f4 d5 3 Nf3 dxe4 | C00 | King's Pawn-French Defence-La Bourdonnais Variation-Reuter Gambit |
| 1 e4 e6 2 g3 | C00 Explore | King's Pawn-French Defence-Réti-Spielmann Attack |
| 1 e4 e6 2 Nc3 | C00 Explore | King's Pawn-French Defence-Queen's Knight Variation |
| 1 e4 e6 2 Nc3 d5 3 f4 | C00 Explore | King's Pawn-French Defence-Queen's Knight Variation-Pelikán Variation |
| 1 e4 e6 2 Nc3 d5 3 Nf3 | C00 Explore | King's Pawn-French Defence-Queen's Knight Variation-2 Knights Variation |
| 1 e4 e6 2 Nf3 | C00 Explore | King's Pawn-French Defence-Knight/King's Knight Variation |
| 1 e4 e6 2 Nf3 d5 3 e5 c5 4 b4 | C00 | King's Pawn-French Defence-Knight Variation-Wing Gambit |
| 1 e4 e6 2 Nf3 d5 3 Nc3 | C00 | King's Pawn-French Defence-Knight Variation-2 Knights Variation |
| 1 e4 e6 2 Nf3 f5 | C00 Explore | King's Pawn-French Defence-Knight Variation-Franco-Hiva Gambit II |
| 1 e4 e6 2 Qe2 | C00 Explore | King's Pawn-French Defence-Chigorin Variation |
| 1 e4 f5 | B00 Explore | King's Pawn-Fred Defence/Duras Gambit |
| 1 e4 f6 | B00 Explore | King's Pawn-Barnes Defence |
| 1 e4 f6 2 d4 b6 3 c4 Bb7 | B00 | King's Pawn-Barnes Defence-Owen Defence-Unicorn Variation |
| 1 e4 f6 2 d4 Kf7 | B00 Explore | King's Pawn-Barnes Defence-Fried Fox Defence |
| 1 e4 g5 | B00 Explore | King's Pawn-Borg/Basman/Macho Grob Defence |
| 1 e4 g5 2 d4 Bg7 | B00 | King's Pawn-Borg Defence-Borg Gambit |
| 1 e4 g5 2 d4 e5 | B00 | King's Pawn-Borg Defence-Zilbermints Gambit |
| 1 e4 g5 2 d4 e6 3 c3 c5 4 dxc5 b6 | B00 | King's Pawn-Borg Defence-Langhorst Gambit |
| 1 e4 g5 2 d4 g4 3 Qxg4 d5 4 Qf3 dxe4 5 Qxe4 Nf6 6 Qh4 Rg8 7 Nf3 Rg4 8 Qh3 Re4+ | B00 | King's Pawn-Borg Defence-Madladn G Slag |
| 1 e4 g5 2 d4 h6 3 h4 g4 | B00 | King's Pawn-Borg Defence-Troon Gambit |
| 1 e4 g6 | B06 Explore | King's Pawn-Robatsch/Modern/King Pawn Fianchetto Defence |
| 1 e4 g6 2 Bc4 Bg7 3 Qf3 e6 4 d4 Bxd4 (5 Ne2 Bg7 6 Nbc3) | B06 | King's Pawn-Robatsch Defence-Bishop Attack-Monkey's Bum Variation |
| 1 e4 g6 2 d4 Bg7 3 Bc4 | B06 | King's Pawn-Robatsch Defence-Bishop Attack |
| 1 e4 g6 2 d4 Bg7 3 Bc4 b5 | B06 | King's Pawn-Robatsch Defence-Bishop Attack-Bücker Gambit |
| 1 e4 g6 2 d4 Bg7 3 Bd2 | B06 | King's Pawn-Robatsch Defence-Westermann Gambit |
| 1 e4 g6 2 d4 Bg7 3 Bd3 | B06 | King's Pawn-Robatsch Defence-Wind Gambit |
| 1 e4 g6 2 d4 Bg7 3 c4 c5 4 d5 d6 5 Nc3 Bxc3+ 6 bxc3 Qa5 | B06 | King's Pawn-Robatsch Defence-Pterodactyl Defence-Central, Benoni, Beefeater Pterodactyl Variation |
| 1 e4 g6 2 d4 Bg7 3 c4 c5 4 d5 d6 5 Nc3 Qa5 | B06 | King's Pawn-Robatsch Defence-Pterodactyl Defence-Central, Benoni, Quetzalcoatlus Variation |
| 1 e4 g6 2 d4 Bg7 3 c4 c5 4 d5 Qa5+ | B06 | King's Pawn-Robatsch Defence-Pterodactyl Defence-Central, Benoni, Pterodactyl Variation |
| 1 e4 g6 2 d4 Bg7 3 c4 c5 4 Nc3 d6 5 Be3 Qa5 | B06 | King's Pawn-Robatsch Defence-Pterodactyl Defence-Central, Anhanguera Variation |
| 1 e4 g6 2 d4 Bg7 3 c4 c5 4 Nc3 d6 5 Nf3 Qa5 | B06 | King's Pawn-Robatsch Defence-Pterodactyl Defence-Central, Quetzalcoatlus Variation |
| 1 e4 g6 2 d4 Bg7 3 c4 c5 4 Nc3 d6 5 Nge2 Qa5 | B06 | King's Pawn-Robatsch Defence-Pterodactyl Defence-Central, Bogolubovia Variation |
| 1 e4 g6 2 d4 Bg7 3 c4 c5 4 Nf3 d6 5 Be2 Qa5+ | B06 | King's Pawn-Robatsch Defence-Semi-Averbakh Variation-Pterodactyl Variation Declined |
| 1 e4 g6 2 d4 Bg7 3 c4 c5 4 Nf3 d6 5 dxc5 Qa5+ | B06 | King's Pawn-Robatsch Defence-Semi-Averbakh Variation-Pterodactyl Variation Accepted |
| 1 e4 g6 2 d4 Bg7 3 c4 c5 4 Nf3 Qa5+ | B06 | King's Pawn-Robatsch Defence-Semi-Averbakh Variation-Pterodactyl Variation |
| 1 e4 g6 2 d4 Bg7 3 c4 c5 4 Nf3 Qb6 | A40 | King's Pawn-Robatsch Defence-Semi-Averbakh Variation-Polish Variation |
| 1 e4 g6 2 d4 Bg7 3 c4 d5 4 exd5 c6 5 dxc6 Bxd4 | A40 | King's Pawn-Robatsch Defence-Dunworthy Variation |
| 1 e4 g6 2 d4 Bg7 3 f4 | B06 | King's Pawn-Robatsch Defence-3 Pawns Attack |
| 1 e4 g6 2 d4 Bg7 3 f4 b6 4 c4 Bb7 | B06 | King's Pawn-Robatsch Defence-3 Pawns Attack-Double Fianchetto |
| 1 e4 g6 2 d4 Bg7 3 f4 c5 4 c3 Qa5 | B06 | Robatsch Defence-3 Pawns Attack-Pterodactyl Defence-Austrian, Pteronodon |
| 1 e4 g6 2 d4 Bg7 3 f4 c5 4 Nf3 Qa5+ | B06 | King's Pawn-Robatsch Defence-3 Pawns Attack-Austrian, Austriadactylus, Western |
| 1 e4 g6 2 d4 Bg7 3 g3 c5 4 dxc5 Qa5+ | B06 | King's Pawn-Robatsch Defence-Pterodactyl Defence-Fianchetto, Rhamporhynchus Variation |
| 1 e4 g6 2 d4 Bg7 3 g3 c5 4 Nf3 Qa5+ | B06 | King's Pawn-Robatsch Defence-Pterodactyl Defence-Fianchetto, King Pterodactyl Variation |
| 1 e4 g6 2 d4 Bg7 3 Nc3 | B06 | King's Pawn-Robatsch Defence-Standard Line |
| 1 e4 g6 2 d4 Bg7 3 Nc3 b6 | B06 | King's Pawn-Robatsch Defence-Standard Line-Mongredien Defence |
| 1 e4 g6 2 d4 Bg7 3 Nc3 c5 | B06 | King's Pawn-Robatsch Defence-Standard Line-Modern Pterodactyl Variation |
| 1 e4 g6 2 d4 Bg7 3 Nc3 c5 4 Be3 | B06 | Robatsch Defence-Standard Line-Modern Pterodactyl Variation-Eastern, Anhanguera Variation |
| 1 e4 g6 2 d4 Bg7 3 Nc3 c5 4 d5 | B06 | Robatsch Defence-Standard Line-Modern Pterodactyl Variation-Eastern, Benoni Variation |
| 1 e4 g6 2 d4 Bg7 3 Nc3 c5 4 d5 Bxc3+ 5 bxc3 Qa5 | B06 | Robatsch Defence-Modern Pterodactyl Variation-Eastern, Benoni Variation-Pteronodon Variation |
| 1 e4 g6 2 d4 Bg7 3 Nc3 c5 4 d5 Qa5 | B06 | Robatsch Defence-Modern Pterodactyl Variation-Eastern, Benoni Variation-Pterodactyl Variation |
| 1 e4 g6 2 d4 Bg7 3 Nc3 c5 4 dxc5 | B06 | Robatsch Defence-Standard Line-Modern Pterodactyl Variation-Eastern, Rhamporhynchus Variation |
| 1 e4 g6 2 d4 Bg7 3 Nc3 c5 4 dxc5 Bxc3+ 5 bxc3 Qa5 | B06 | Robatsch Defence-Modern Pterodactyl Variation-Eastern, Rhamporhynchus Variation-Pteronodon Variation |
| 1 e4 g6 2 d4 Bg7 3 Nc3 c5 4 dxc5 Bxc3+ 5 bxc3 Qa5 6 Nf3 | B06 | Robatsch Defence-Modern Pterodactyl Variation-Eastern, Rhamporhynchus Variation-Sicilian, Pteronodon Variation |
| 1 e4 g6 2 d4 Bg7 3 Nc3 c5 4 dxc5 Qa5 | B06 | Robatsch Defence-Modern Pterodactyl Variation-Eastern, Rhamporhynchus Variation-Pterodactyl Variation |
| 1 e4 g6 2 d4 Bg7 3 Nc3 c5 4 Nf3 Qa5 | B06 | Robatsch Defence-Standard Line-Modern Pterodactyl Variation-Pterodactyl Variation |
| 1 e4 g6 2 d4 Bg7 3 Nc3 c5 4 Nf3 Qa5 5 Bc4 | B06 | Robatsch Defence-Modern Pterodactyl Variation-Pterodactyl Variation-Sicilian, Siroccopteryx Variation |
| 1 e4 g6 2 d4 Bg7 3 Nc3 c5 4 Nf3 Qa5 5 Bd2 | B06 | Robatsch Defence-Modern Pterodactyl Variation-Pterodactyl Variation-Sicilian, Unpin Variation |
| 1 e4 g6 2 d4 Bg7 3 Nc3 c5 4 Nf3 Qa5 5 Be2 d6 | B06 | Robatsch Defence-Modern Pterodactyl Variation-Pterodactyl Variation-Sicilian, Quetzalcoatlus Variation |
| 1 e4 g6 2 d4 Bg7 3 Nc3 c5 4 Nf3 Qa5 5 Be3 | B06 | Robatsch Defence-Modern Pterodactyl Variation-Pterodactyl Variation-Sicilian, Anhanguera Variation |
| 1 e4 g6 2 d4 Bg7 3 Nc3 c5 4 Nf3 Qa5 5 d5 | B06 | Robatsch Defence-Modern Pterodactyl Variation-Pterodactyl Variation-Sicilian, Benoni Gambit |
| 1 e4 g6 2 d4 Bg7 3 Nc3 c5 4 Nf3 Qa5 5 dxc5 | B06 | Robatsch Defence-Modern Pterodactyl Variation-Pterodactyl Variation-Sicilian, Rhamporhynchus Variation |
| 1 e4 g6 2 d4 Bg7 3 Nc3 c6 4 f4 d5 5 e5 h5 | B06 | King's Pawn-Robatsch Defence-Standard Line-Gurgenidze Defence |
| 1 e4 g6 2 d4 Bg7 3 Nc3 d5 | B06 | Robatsch Defence-Standard Line-Lizard Defence-Mittenberger Gambit |
| 1 e4 g6 2 d4 Bg7 3 Nc3 d6 | B06 | King's Pawn-Robatsch Defence-Standard Line-Standard Defence |
| 1 e4 g6 2 d4 Bg7 3 Nc3 d6 4 Bc4 c6 5 Qe2 | B06 | Robatsch Defence-Standard Line-Standard Defence-Anti-Modern Variation |
| 1 e4 g6 2 d4 Bg7 3 Nc3 d6 4 f4 | B06 | Robatsch Defence-Standard Line-Standard Defence-Pseudo-Austrian Attack |
| 1 e4 g6 2 d4 Bg7 3 Nc3 d6 4 Nf3 | B06 | Robatsch Defence-Standard Line-Standard Defence-2 Knights Variation |
| 1 e4 g6 2 d4 Bg7 3 Nc3 d6 4 Nf3 c6 | B06 | Robatsch Defence-Standard Defence-2 Knights Variation-Suttles Variation |
| 1 e4 g6 2 d4 Bg7 3 Nc3 d6 4 Nf3 c6 5 Bg5 Qb6 6 Qd2 Qxb2 | B06 | Robatsch Defence-2 Knights Variation-Suttles Variation-Tal Gambit |
| 1 e4 g6 2 d4 Bg7 3 Nf3 b6 | B06 | King's Pawn-Robatsch Defence-Mongrédien Defence |
| 1 e4 g6 2 d4 Bg7 3 Nf3 c5 4 Bc4 cxd4 5 Nxd4 Qa5+ | B06 | King's Pawn-Robatsch Defence-Pterodactyl Defence, Western, Siroccopteryx Variation |
| 1 e4 g6 2 d4 Bg7 3 Nf3 c5 4 Be3 Qa5+ | B06 | King's Pawn-Robatsch Defence-Pterodactyl Defence-Western, Anhanguera Variation |
| 1 e4 g6 2 d4 Bg7 3 Nf3 c5 4 c3 Qa5 | B06 | King's Pawn-Robatsch Defence-Pterodactyl Defence-Western, Pterodactyl Variation |
| 1 e4 g6 2 d4 Bg7 3 Nf3 c5 4 c4 Qb6 | B06 | King's Pawn-Robatsch Defence-Improved Maroczy Variation |
| 1 e4 g6 2 d4 Bg7 3 Nf3 c5 4 dxc5 Qa5+ | B06 | King's Pawn-Robatsch Defence-Pterodactl Defence-Western, Pterodactyl Variation |
| 1 e4 g6 2 d4 Bg7 3 Nf3 d6 | B06 | King's Pawn-Robatsch Defence-Small Centre Variation |
| 1 e4 g6 2 d4 Bg7 3 Nf3 d6 4 c3 | B07 | King's Pawn-Robatsch Defence-Small Centre Variation-Geller's System |
| 1 e4 g6 2 d4 Bg7 3 Nf3 d6 4 c4 Bg4 | A41 | King's Pawn-Robatsch Defence-Small Centre Variation-Rossolimo Variation |
| 1 e4 g6 2 d4 d6 | B06 Explore | King's Pawn-Robatsch Defence-Lizard Variation |
| 1 e4 g6 2 d4 d6 3 Nc3 c6 | B07 | King's Pawn-Robatsch Defence-Lizard Variation-Accelerated Gurgenidze Variation |
| 1 e4 g6 2 d4 f5 | B06 Explore | King's Pawn-Robatsch Defence-Fianchetto Gambit |
| 1 e4 g6 2 d4 Nf6 (3 e5 Nh5 4 g4 Ng7) | B06 Explore | King's Pawn-Robatsch Defence-Norwegian Defence |
| 1 e4 g6 2 d4 Nf6 3 e5 Nh5 4 Be2 d6 | B06 | King's Pawn-Robatsch Defence-Norwegian Defence-Norwegian Gambit |
| 1 e4 g6 2 d4 Nh6 3 Nc3 f5 4 Bxh6 Bxh6 5 exf5 0-0 | B06 | King's Pawn-Robatsch Defence-Masur Gambit |
| 1 e4 g6 2 Nc3 Bg7 3 f4 c5 4 Nf3 Qa5 | B06 | King's Pawn-Robatsch Defence-Pterodactyl Defence-Austrian, Grand Prix, Pterodactyl |
| 1 e4 h5 | B00 Explore | King's Pawn-Goldsmith/Pickering Defence |
| 1 e4 h5 2 d4 Nf6 | B00 | King's Pawn-Goldsmith Defence-Picklepuss Defence |
| 1 e4 h6 | B00 Explore | King's Pawn-Carr's Defence |
| 1 e4 h6 2 d4 e5 | B00 | King's Pawn-Carr's Defence-Zilbermints Gambit |
| 1 e4 Na6 | B00 Explore | King's Pawn-Lemming/Guatemala Defence |
| 1 e4 Nc6 | B00 Explore | King's Pawn-Nimzowitsch Defence |
| 1 e4 Nc6 2 b4 (Nxb4 3 c3 Nc6 4 d4) | B00 Explore | King's Pawn-Nimzowitsch Defence-Wheeler Gambit |
| 1 e4 Nc6 Bb5 | B00 Explore | King's Pawn-Nimzowitsch Defence-Pseudo-Spanish Variation |
| 1 e4 Nc6 2 d4 | B00 Explore | King's Pawn-Nimzowitsch Defence-Centre Variation |
| 1 e4 Nc6 2 d4 a6 | B00 Explore | King's Pawn-Nimzowitsch Defence-Centre Variation-Woodchuck Variation |
| 1 e4 Nc6 2 d4 d5 | B00 Explore | King's Pawn-Nimzowitsch Defence-Centre Variation-Scandinavian Variation |
| 1 e4 Nc6 2 d4 d5 3 Be3 | B00 | Nimzowitsch Defence-Centre Variation-Scandinavian Variation-Hornung Gambit |
| 1 e4 Nc6 2 d4 d5 3 e5 | B00 | Nimzowitsch Defence-Centre Variation-Scandinavian Variation-Advance Variation |
| 1 e4 Nc6 2 d4 d5 3 exd5 Nb4 | B00 | Nimzowitsch Defence-Centre Variation-Scandinavian Variation-Aachen Gambit |
| 1 e4 Nc6 2 d4 d5 3 exd5 Qxd5 | B00 | Nimzowitsch Defence-Centre Variation-Scandinavian Variation-Exchange Variation |
| 1 e4 Nc6 2 d4 d5 3 exd5 Qxd5 4 Nc3 | B00 | Nimzowitsch Defence-Scandinavian Variation-Exchange Variation-Marshall Gambit |
| 1 e4 Nc6 2 d4 d5 3 Nc3 | B00 | Nimzowitsch Defence-Centre Variation-Scandinavian Variation-Bogoljubov Variation |
| 1 e4 Nc6 2 d4 d5 3 Nc3 a6 | B00 | Nimzowitsch Defence-Scandinavian Variation-Bogoljubov Variation-Brandics Gambit |
| 1 e4 Nc6 2 d4 d5 3 Nc3 dxe4 4 d5 Nb8 5 f3 | B00 | Nimzowitsch Defence-Scandinavian Variation-Bogoljubov Variation-Richter Gambit |
| 1 e4 Nc6 2 d4 d5 3 Nc3 dxe4 4 d5 Ne5 | B00 | Nimzowitsch Defence-Scandinavian Variation-Bogoljubov Variation-Nimzowitsch Gambit |
| 1 e4 Nc6 2 d4 d5 3 Nc3 e5 | B00 | Nimzowitsch Defence-Scandinavian Variation-Bogoljubov Variation-Heinola-Deppe Gambit |
| 1 e4 Nc6 2 d4 d5 3 Nc3 g6 | B00 | Nimzowitsch Defence-Scandinavian Variation-Bogoljubov Variation-Erben Gambit |
| 1 e4 Nc6 2 d4 d5 3 Nc3 Nf6 | B00 | Nimzowitsch Defence-Scandinavian Variation-Bogoljubov Variation-Vehre Variation |
| 1 e4 Nc6 2 d4 d6 | B00 Explore | King's Pawn-Nimzowitsch Defence-Centre Variation-Mikenas Variation |
| 1 e4 Nc6 2 d4 e5 | B00 Explore | King's Pawn-Nimzowitsch Defence-Centre Variation-Kennedy Variation |
| 1 e4 Nc6 2 d4 e5 3 d5 | B00 | Nimzowitsch Defence-Centre Variation-Kennedy Variation-Linksspringer Variation |
| 1 e4 Nc6 2 d4 e5 3 dxe5 Bc5 | B00 | Nimzowitsch Defence-Centre Variation-Kennedy Variation-Bielefelder Gambit |
| 1 e4 Nc6 2 d4 e5 3 dxe5 d6 | B00 | Nimzowitsch Defence-Centre Variation-Kennedy Variation-de Smet Gambit |
| 1 e4 Nc6 2 d4 e5 3 dxe5 f6 | B00 | Nimzowitsch Defence-Centre Variation-Kennedy Variation-Hammer Gambit |
| 1 e4 Nc6 2 d4 e5 3 dxe5 Nxe5 4 f4 Nc6 | B00 | Nimzowitsch Defence-Centre Variation-Kennedy Variation-Riemann Defence |
| 1 e4 Nc6 2 d4 e5 3 dxe5 Nxe5 4 f4 Ng6 | B00 | Nimzowitsch Defence-Centre Variation-Kennedy Variation-Main Line |
| 1 e4 Nc6 2 d4 e5 3 dxe5 Nxe5 4 Nc3 | B00 | Nimzowitsch Defence-Centre Variation-Kennedy Variation-Keres Attack |
| 1 e4 Nc6 2 d4 e5 3 dxe5 Nxe5 4 Nf3 | B00 | Nimzowitsch Defence-Centre Variation-Kennedy Variation-Paulsen Attack |
| 1 e4 Nc6 2 d4 e5 3 dxe5 Qh4 | B00 | Nimzowitsch Defence-Centre Variation-Kennedy Variation-Herford Gambit |
| 1 e4 Nc6 2 d4 e6 3 Nc3 f5 4 exf5 Nf6 | B00 | King's Pawn-Nimzowitsch Defence-Centre Variation-Franco-Hiva Gambit 2 |
| 1 e4 Nc6 2 d4 e6 3 Nf3 f5 4 exf5 Nf6 | B00 | King's Pawn-Nimzowitsch Defence-Centre Variation-Franco-Hiva Gambit 1 |
| 1 e4 Nc6 2 d4 f6 | B00 Explore | King's Pawn-Nimzowitsch Defence-Centre Variation-Neo-Mongoloid Defence |
| 1 e4 Nc6 2 Nc3 e6 | B00 | King's Pawn-Nimzowitsch Defence-French Connection |
| 1 e4 Nc6 2 Nc3 g6 | B00 | King's Pawn-Nimzowitsch Defence-Pirc Connection |
| 1 e4 Nc6 2 Nc3 Nf6 3 d4 e5 | B00 | King's Pawn-Nimzowitsch Defence-Breyer Variation |
| 1 e4 Nc6 2 Nf3 | B00 Explore | King's Pawn-Nimzowitsch Defence Declined |
| 1 e4 Nc6 2 Nf3 d6 | B00 | King's Pawn-Nimzowitsch Defence Declined-Williams Variation |
| 1 e4 Nc6 2 Nf3 e6 | B00 | King's Pawn-Nimzowitsch Defence Declined-Franco-Nimzowitsch/French Variation |
| 1 e4 Nc6 2 Nf3 f5 | B00 | King's Pawn-Nimzowitsch Defence Declined-Colorado Counter/Lean Variation |
| 1 e4 Nc6 2 Nf3 f5 3 exf5 | B00 | King's Pawn-Nimzowitsch Defence Declined-Colorado Counter Accepted |
| 1 e4 Nc6 2 Nf3 Nf6 3 e5 Ng4 | B00 | King's Pawn-Nimzowitsch Defence Declined-El Columpio Defence |
| 1 e4 Nc6 2 Nf3 Nf6 3 e5 Ng4 4 d4 d6 5 h3 Nh6 6 Bb5 | B00 | King's Pawn-Nimzowitsch Defence Declined-El Columpio Defence-Pin Variation |
| 1 e4 Nc6 2 Nf3 Nf6 3 e5 Ng4 4 d4 d6 5 h3 Nh6 6 e6 | B00 | King's Pawn-Nimzowitsch Defence Declined-El Columpio Defence-El Columpio Gambit |
| 1 e4 Nc6 2 Nf3 Nf6 3 e5 Ng4 4 d4 d6 5 h3 Nh6 6 exd6 | B00 | King's Pawn-Nimzowitsch Defence Declined-El Columpio Defence-Exchange Variation |
| 1 e4 Nf6 | B02 Explore | King's Pawn-Alekhine Defence |
| 1 e4 Nf6 2 Bc4 | B02 Explore | King's Pawn-Alekhine Defence-Krejcik Variation |
| 1 e4 Nf6 2 Bc4 Nxe4 3 Bxf7+ | B02 | King's Pawn-Alekhine Defence-Krejcik Variation-Krejcik Gambit |
| 1 e4 Nf6 2 d3 | B02 Explore | King's Pawn-Alekhine Defence-Maróczy Variation |
| 1 e4 Nf6 2 d4 | B02 Explore | King's Pawn-Alekhine Defence-Omega Variation |
| 1 e4 Nf6 2 e5 | B02 Explore | King's Pawn-Alekhine Defence-Main Line |
| 1 e4 Nf6 2 e5 Nd5 | B02 Explore | King's Pawn-Alekhine Defence-Normal Variation |
| 1 e4 Nf6 2 e5 Nd5 3 b3 | B02 | King's Pawn-Alekhine Defence-Normal Variation-Welling Variation |
| 1 e4 Nf6 2 e5 Nd5 3 Bc4 Nb6 4 Bb3 c5 5 d3 | B02 | King's Pawn-Alekhine Defence-Normal Variation-Kmoch Variation |
| 1 e4 Nf6 2 e5 Nd5 3 c4 | B02 | King's Pawn-Alekhine Defence-Normal Variation-2 Pawns/Chase Attack |
| 1 e4 Nf6 2 e5 Nd5 3 c4 Nb4 | B02 | King's Pawn-Alekhine Defence-2 Pawns Attack-Bronstein Variation |
| 1 e4 Nf6 2 e5 Nd5 3 c4 Nb4 4 d4 | B02 | Alekhine Defence-2 Pawns Attack-Bronstein Variation-Main Line |
| 1 e4 Nf6 2 e5 Nd5 3 c4 Nb6 | B02 | Alekhine Defence-Normal Variation-2 Pawns Attack-Main Line |
| 1 e4 Nf6 2 e5 Nd5 3 c4 Nb6 4 b3 | B02 | Alekhine Defence-Normal Variation-2 Pawns Attack-Steiner Variation |
| 1 e4 Nf6 2 e5 Nd5 3 c4 Nb6 4 c5 | B02 | Alekhine Defence-Normal Variation-2 Pawns Attack-Lasker's Attack |
| 1 e4 Nf6 2 e5 Nd5 3 c4 Nb6 4 c5 Nd5 5 Bc4 e6 6 Nc3 | B02 | Alekhine Defence-2 Pawns Attack-Lasker's Attack-Mikenas Variation |
| 1 e4 Nf6 2 e5 Nd5 3 c4 Nb6 4 c5 Nd5 5 Bc4 e6 6 Nc3 d6 7 Nxd5 exd5 8 Bxd5 | B02 | Alekhine Defence-Lasker's Attack-Mikenas Variation-Mikenas Gambit |
| 1 e4 Nf6 2 e5 Nd5 3 c4 Nb6 4 c5 Nd5 5 Nc3 e6 6 Bc4 | B02 | Alekhine Defence-Lasker's Attack-Hunt Variation-Lasker Simul Gambit |
| 1 e4 Nf6 2 e5 Nd5 3 c4 Nb6 4 c5 Nd5 5 Nc3 Nxc3 6 dxc3 d6 7 Bg5 | B02 | Alekhine Defence-Lasker's Attack-Hunt Variation-Matsukevich Gambit |
| 1 e4 Nf6 2 e5 Nd5 3 c4 Nb6 4 d4 d6 5 exd6 cxd6 6 h3 g6 7 Nf3 | B02 | Alekhine Defence-Normal Variation-2 Pawns Attack-Karpov Variation |
| 1 e4 Nf6 2 e5 Nd5 3 c4 Nb6 4 d4 d6 5 Nf3 Bg4 6 Be2 dxe5 7 Nxe5 | B02 | Alekhine Defence-Normal Variation-2 Pawns Attack-Alekhine Variation |
| 1 e4 Nf6 2 e5 Nd5 3 c4 Nf4 | B02 | Alekhine Defence-Normal Variation-2 Pawns Attack-The Squirrel |
| 1 e4 Nf6 2 e5 Nd5 3 d4 | B03 | King's Pawn-Alekhine Defence-Normal/Main Line |
| 1 e4 Nf6 2 e5 Nd5 3 d4 b5 | B03 | King's Pawn-Alekhine Defence-Normal Variation-O'Sullivan Gambit |
| 1 e4 Nf6 2 e5 Nd5 3 d4 d6 4 Bc4 | B03 | King's Pawn-Alekhine Defence-Normal Variation-Balogh Variation |
| 1 e4 Nf6 2 e5 Nd5 3 d4 d6 4 c4 (Nb6 5 c5) | B03 | King's Pawn-Alekhine Defence-Normal Variation-Hunt Variation |
| 1 e4 Nf6 2 e5 Nd5 3 d4 d6 4 c4 Nb6 5 exd6 | B03 | King's Pawn-Alekhine Defence-Normal Variation-Exchange Variation |
| 1 e4 Nf6 2 e5 Nd5 3 d4 d6 4 c4 Nb6 5 exd6 cxd6 6 Nf3 g6 7 Be2 Bg7 8 0-0 0-0 9 h3 Nc6 10 Nc3 Bf5 11 Bf4 | B03 | Alekhine Defence-Normal Variation-Exchange Variation-Karpov Variation |
| 1 e4 Nf6 2 e5 Nd5 3 d4 d6 4 c4 Nb6 5 f4 | B03 | King's Pawn-Alekhine Defence-Normal Variation-4 Pawns Attack |
| 1 e4 Nf6 2 e5 Nd5 3 d4 d6 4 c4 Nb6 5 f4 Bf5 | B03 | Alekhine Defence-Normal Variation-4 Pawns Attack-Trifunovic Variation |
| 1 e4 Nf6 2 e5 Nd5 3 d4 d6 4 c4 Nb6 5 f4 dxe5 6 fxe5 Bf5 7 Nc3 e6 8 Nf3 Bb4 9 Bd3 | B03 | Alekhine Defence-Normal Variation-4 Pawns Attack-Fahrni Variation |
| 1 e4 Nf6 2 e5 Nd5 3 d4 d6 4 c4 Nb6 5 f4 dxe5 6 fxe5 Bf5 7 Nc3 e6 8 Nf3 Be7 9 Be2 0-0 10 0-0 f6 | B03 | Alekhine Defence-Normal Variation-4 Pawns Attack-Korchnoi Variation |
| 1 e4 Nf6 2 e5 Nd5 3 d4 d6 4 c4 Nb6 5 f4 dxe5 6 fxe5 Nc6 7 Be3 | B03 | Alekhine Defence-Normal Variation-4 Pawns Attack-Main Line |
| 1 e4 Nf6 2 e5 Nd5 3 d4 d6 4 c4 Nb6 5 f4 dxe5 6 fxe5 Nc6 7 Be3 Bf5 8 Nc3 e6 9 Nf3 Qd7 10 Be2 0-0-0 11 0-0 Be7 | B03 | Alekhine Defence-4 Pawns Attack-Main Line-Tartakower Variation |
| 1 e4 Nf6 2 e5 Nd5 3 d4 d6 4 c4 Nb6 5 f4 dxe5 6 fxe5 Nc6 7 Nf3 Bg4 8 e6 fxe6 9 c5 | B03 | Alekhine Defence-Normal Variation-4 Pawns Attack-Ilyin-Genevsky Variation |
| 1 e4 Nf6 2 e5 Nd5 3 d4 d6 4 c4 Nb6 5 f4 g5 | B03 | Alekhine Defence-Normal Variation-4 Pawns Attack-Planinc/Cambridge Gambit |
| 1 e4 Nf6 2 e5 Nd5 3 d4 d6 4 c4 Nb6 5 f4 g6 | B03 | Alekhine Defence-Normal Variation-4 Pawns Attack-Fianchetto Variation |
| 1 e4 Nf6 2 e5 Nd5 3 d4 d6 4 Nf3 | B04 | King's Pawn-Alekhine Defence-Normal Variation-Modern Variation |
| 1 e4 Nf6 2 e5 Nd5 3 d4 d6 4 Nf3 Bg4 | B05 | Alekhine Defence-Normal Variation-Modern Variation-Main Line |
| 1 e4 Nf6 2 e5 Nd5 3 d4 d6 4 Nf3 Bg4 5 Be2 c6 | B05 | Alekhine Defence-Normal Variation-Modern Variation-Flohr Variation |
| 1 e4 Nf6 2 e5 Nd5 3 d4 d6 4 Nf3 Bg4 5 c4 | B05 | Alekhine Defence-Normal Variation-Modern Variation-Alekhine Variation |
| 1 e4 Nf6 2 e5 Nd5 3 d4 d6 4 Nf3 Bg4 5 c4 Nb6 6 Be2 | B05 | Alekhine Defence-Modern Variation-Alekhine Variation-Alekhine Gambit |
| 1 e4 Nf6 2 e5 Nd5 3 d4 d6 4 Nf3 Bg4 5 c4 Nb6 6 d5 | B05 | Alekhine Defence-Modern Variation-Alekhine Variation-Vitolins Attack |
| 1 e4 Nf6 2 e5 Nd5 3 d4 d6 4 Nf3 Bg4 5 h3 | B05 | Alekhine Defence-Normal Variation-Modern Variation-Panov Variation |
| 1 e4 Nf6 2 e5 Nd5 3 d4 d6 4 Nf3 dxe5 | B04 | Alekhine Defence-Normal Variation-Modern Variation-Larsen Variation |
| 1 e4 Nf6 2 e5 Nd5 3 d4 d6 4 Nf3 dxe5 5 Nxe5 c6 | B04 | Alekhine Defence-Modern Variation-Larsen Variation-Miles Line |
| 1 e4 Nf6 2 e5 Nd5 3 d4 d6 4 Nf3 g6 | B04 | Alekhine Defence-Normal Variation-Modern Variation-Fianchetto/Alburt Variation |
| 1 e4 Nf6 2 e5 Nd5 3 d4 d6 4 Nf3 g6 5 Bc4 Nb6 6 Bb3 Bg7 7 a4 | B04 | Alekhine Defence-Modern Variation-Fianchetto Variation-Keres Variation |
| 1 e4 Nf6 2 e5 Nd5 3 d4 d6 4 Nf3 g6 5 c4 Nb6 6 exd6 cxd6 7 h3 Bg7 8 Be2 0-0 9 Nc3 Nc6 10 0-0 Bf5 11 Bf4 | B04 | Alekhine Defence-Modern Variation-Fianchetto Variation-Karpov Variation |
| 1 e4 Nf6 2 e5 Nd5 3 d4 d6 4 Nf3 Nb6 | B04 | Alekhine Defence-Normal Variation-Modern Variation-Schmid Variation |
| 1 e4 Nf6 2 e5 Nd5 3 d4 d6 4 Nf3 Nc6 | B04 | Alekhine Defence-Normal Variation-Modern Variation-Larsen-Haakert Variation |
| 1 e4 Nf6 2 e5 Nd5 3 Na3 | B03 | King's Pawn-Alekhine Defence-Normal Variation-Buckley Attack |
| 1 e4 Nf6 2 e5 Nd5 3 Nc3 | B02 | King's Pawn-Alekhine Defence-Normal Variation-Sämisch Attack |
| 1 e4 Nf6 2 e5 Ne4 | B02 Explore | King's Pawn-Alekhine Defence-Mokele Mbembe/Buecker Variation |
| 1 e4 Nf6 2 e5 Ne4 3 d4 e6 | B02 | King's Pawn-Alekhine Defence-Mokele Mbembe Variation-Vavra Defence |
| 1 e4 Nf6 2 e5 Ne4 3 d4 f6 | B02 | King's Pawn-Alekhine Defence-Mokele Mbembe Variation-Modern Line |
| 1 e4 Nf6 2 e5 Ng8 | B02 Explore | King's Pawn-Alekhine Defence-Brooklyn Defence |
| 1 e4 Nf6 2 e5 Ng8 3 d4 f5 | B02 | King's Pawn-Alekhine Defence-Brooklyn Defence-Everglades Variation |
| 1 e4 Nf6 2 e5 Ng8 3 d4 Nc6 4 d5 Nb8 | B02 | King's Pawn-Alekhine Defence-Brooklyn Defence-Zaire Variation |
| 1 e4 Nf6 2 Nc3 d5 | B02 | King's Pawn-Alekhine Defence-Scandinavian Variation |
| 1 e4 Nf6 2 Nc3 d5 3 d3 dxe4 4 Bg5 | B02 | King's Pawn-Alekhine Defence-Scandinavian Variation-Myers Gambit |
| 1 e4 Nf6 2 Nc3 d5 3 e5 Nfd7 4 e6 | B02 | King's Pawn-Alekhine Defence-Scandinavian Variation-Spielmann Gambit |
| 1 e4 Nf6 2 Nc3 d5 3 exd5 c6 | B02 | King's Pawn-Alekhine Defence-Scandinavian Variation-Geschev Gambit |
| 1 e4 Nf6 2 Nf3 | B02 Explore | King's Pawn-Alekhine Defence-John Tracy Gambit |
| 1 e4 Nh6 | B00 Explore | King's Pawn-Adams Defence |
| 1 e4 Nh6 2 d4 g6 3 c4 f6 | B00 | King's Pawn-Adams Defence-Hippopotamus Defence |
| 1 f3 | A00 Explore | Barnes/Gedult's Opening |
| 1 f3 c5 2 Kf2 Nc6 3 Ke3 e6 4 c3 Be7 5 Kd3 Nf6 6 Kc2 0-0 7 Qe1 Nd5 8 Kd1 | A00 | Barnes Opening-Transvestite Opening |
| 1 f3 d5 2 e4 g6 3 d4 dxe4 4 c3 | A00 | Barnes Opening-Gedult Gambit #1 |
| 1 f3 e5 2 e4 Nf6 3 Bc4 | A00 | Barnes Opening-Walkerling Variation |
| 1 f3 e5 2 Kf2 | A00 Explore | Barnes Opening-Hammerschlag/Fried Fox/Pork Chop Opening |
| 1 f3 f5 2 e4 fxe4 3 Nc3 | A00 | Barnes Opening-Gedult Gambit #2 |
| 1 f4 | A02 Explore | Bird System |
| 1 f4 b5 | A02 Explore | Bird System-Myers Defence |
| 1 f4 d5 | A03 Explore | Bird System-Dutch Variation |
| 1 f4 d5 2 b3 Nf6 3 Bb2 d4 4 Nf3 c5 5 e3 | A03 | Bird System-Thomas Gambit |
| 1 f4 d5 2 c4 | A03 Explore | Bird System-Dutch Variation-Sturm/Mujannah Gambit |
| 1 f4 d5 2 d4 | A03 Explore | Bird System-Dutch Variation-Canard Variation |
| 1 f4 d5 2 d4 f5 | A03 | Bird System-Dutch Variation-Canard Variation-Double Duck Variation |
| 1 f4 d5 2 e3 Nf6 3 Nf3 Bg4 | A03 | Bird System-Dutch Variation-Schlechter Variation |
| 1 f4 d5 2 e3 Nf6 3 Nf3 c5 | A03 | Bird System-Dutch Variation-Lasker Variation |
| 1 f4 d5 2 e4 | A03 Explore | Bird System-Dutch Variation-Williams Gambit |
| 1 f4 d5 2 e4 dxe4 3 d3 | A03 | Bird System-Dutch Variation-Williams Gambit-Prokofiev Variation |
| 1 f4 d5 2 e4 dxe4 3 Nc3 Nf6 4 Nge2 | A03 | Bird System-Dutch Variation-Williams Gambit-Williams-Zilbermints Gambit |
| 1 f4 d5 2 g4 | A03 Explore | Bird System-Dutch Variation-Dudweiler Gambit |
| 1 f4 d5 2 Nf3 c5 3 e4 dxe4 | A03 | Bird System-Dutch Variation-Batavo Gambit |
| 1 f4 d5 2 Nf3 Nf6 3 e3 c5 | A03 | Bird System-Dutch Variation-Lasker Variation |
| 1 f4 e5 | A02 Explore | Bird System-From Gambit |
| 1 f4 e5 2 d4 exd4 3 Nf3 c5 4 c3 | A02 | Bird System-From Gambit-Siegener Gambit |
| 1 f4 e5 2 fxe5 d6 3 exd6 Bxd6 4 Nf3 g5 | A02 | Bird System-From Gambit-Lasker Variation |
| 1 f4 e5 2 fxe5 d6 3 exd6 Bxd6 4 Nf3 Nh6 5 d4 | A02 | Bird System-From Gambit-Lipke Variation |
| 1 f4 e5 2 fxe5 d6 3 exd6 Nf6 | A02 | Bird System-From Gambit-Langheld Gambit |
| 1 f4 e5 2 fxe5 f6 | A02 | Bird System-Lasker Gambit |
| 1 f4 e5 2 fxe5 Nc6 | A02 | Bird System-From Gambit-Schlechter Gambit |
| 1 f4 e5 2 fxe5 Ne7 | A02 | Bird System-Platz Gambit |
| 1 f4 e5 2 Nc3 | A02 | Bird System-From Gambit-Bahr Gambit |
| 1 f4 f5 2 d4 d5 | A02 | Bird System-Double Duck Formation |
| 1 f4 f5 2 e4 | A02 | Bird System-Wagner-Zwitersch Gambit |
| 1 f4 f5 2 e4 fxe4 3 Nc3 Nf6 4 g4 | A02 | Bird System-Wagner-Zwitersch Gambit-Swiss Gambit |
| 1 f4 g5 | A02 Explore | Bird System-Hobbs Gambit |
| 1 f4 h6 2 Nf3 g5 | A02 | Bird System-Hobbs-Zilbermints Gambit |
| 1 f4 Nf6 2 b4 | A02 Explore | Bird System-Polish Variation |
| 1 f4 Nf6 2 b4 g6 3 Nf3 | A02 | Bird System-Polish Variation-Batavo Variation |
| 1 f4 Nf6 2 c4 | A03 Explore | Bird System-Mujannah Opening |
| 1 f4 Nf6 2 Nf3 g6 3 b4 | A02 | Bird System-Batavo-Polish Attack |
| 1 f4 Nh6 | A03 Explore | Bird System-Horsefly Defence |
| 1 g3 | A00 Explore | Benko/Hungarian Opening |
| 1 g3 c5 | A00 Explore | Benko Opening-Sicilian Invitation |
| 1 g3 d5 2 Bg2 c5 | A00 | Benko Opening-Reversed Modern Defence |
| 1 g3 d5 2 Bg2 c6 | A00 | Benko Opening-Slav Formation |
| 1 g3 d5 2 Bg2 e5 3 c4 dxc4 4 b3 | A00 | Benko Opening-Winterberg Gambit |
| 1 g3 d5 2 Bg2 e6 | A00 | Benko Opening-Catalan Formation |
| 1 g3 d5 2 Nf3 g5 | A00 | Benko Opening-Wiedenhagen-Beta Gambit |
| 1 g3 e5 2 a3 d5 3 Nf3 e4 4 Nh4 Be7 5 d3 | A00 | Benko Opening-Burk Gambit |
| 1 g3 e5 2 Bg2 d5 3 b4 | A00 | Benko Opening-Buecker Gambit |
| 1 g3 e5 2 Nf3 | A00 Explore | Benko Opening-Reversed Alekhine Defence |
| 1 g3 e5 2 Nf3 e4 3 Ng1 Nf6 4 b4 | A00 | Benko Opening-Reversed Alekhine Defence-Reversed Brooklyn Defence-Brooklyn Benko Gambit |
| 1 g3 e5 2 Nf3 e4 3 Nh4 | A00 | Benko Opening-Reversed Alekhine Defence-Reversed Norwegian Defence |
| 1 g3 e5 2 Nh3 d5 3 f4 Bxh3 4 Bxh3 exf4 5 0-0 | A00 | Benko Opening-Paris Gambit |
| 1 g3 f5 | A00 Explore | Benko Opening-Dutch Defence |
| 1 g3 f5 2 e4 fxe4 3 Qh5+ g6 | A00 | Benko Opening-Dutch Defence-Paschmann Gambit |
| 1 g3 g5 | A00 Explore | Benko Opening-Myers Defence |
| 1 g3 g6 | A00 Explore | Benko Opening-Symmetrical Variation |
| 1 g3 h5 | A00 Explore | Benko Opening-Lasker Simul Special |
| 1 g3 h5 2 Nf3 h4 | A00 | Benko Opening-Lasker Simul Special-Van Kruijk Gambit |
| 1 g3 Nc6 2 Nc3 d5 3 d4 e5 4 dxe5 d4 5 Ne4 f5 | A00 | Benko Opening-Asten Gambit |
| 1 g3 Nf6 | A00 Explore | Benko Opening-Indian Defence |
| 1 g4 | A00 Explore | Grob Attack |
| 1 g4 d5 2 Bg2 | A00 Explore | Grob Attack-Grob Gambit |
| 1 g4 d5 2 Bg2 Bxg4 3 c4 | A00 | Grob Attack-Grob Gambit-Fritz Gambit |
| 1 g4 d5 2 Bg2 Bxg4 3 c4 d4 | A00 | Grob Attack-Grob Gambit-Fritz Gambit-Romford Countergambit |
| 1 g4 d5 2 Bg2 c6 | A00 | Grob Attack-Grob Gambit Declined |
| 1 g4 d5 2 Bg2 c6 3 c4 dxc4 4 b3 | A00 | Grob Attack-Grob Gambit Declined-Richter-Grob Gambit |
| 1 g4 d5 2 Bg2 c6 3 g5 | A00 | Grob Attack-Grob Gambit Declined-Spike Attack |
| 1 g4 d5 2 Bg2 e5 3 c4 | A00 | Grob Attack-Grob Gambit-Hurst Variation |
| 1 g4 d5 2 Bg2 e5 3 d4 exd4 4 c3 | A00 | Grob Attack-Grob Gambit-Keres Gambit |
| 1 g4 d5 2 Bg2 h5 3 gxh5 | A00 | Grob Attack-Grob Gambit-Basman Gambit |
| 1 g4 d5 2 e4 dxe4 3 Nc3 | A00 | Grob Attack-Zilbermints Gambit |
| 1 g4 d5 2 e4 dxe4 3 Nc3 e5 4 d3 | A00 | Grob Attack-Zilbermints Gambit-Zilbermints-Hartlaub Gambit |
| 1 g4 d5 2 e4 dxe4 3 Nc3 h5 | A00 | Grob Attack-Zilbermints Gambit-Schiller Defence |
| 1 g4 d5 2 h3 e5 3 Bg2 c6 | A00 | Grob Attack-Keene Defence |
| 1 g4 d5 2 h3 e5 3 Bg2 c6 4 d4 e4 5 c4 Bd6 6 Nc3 Ne7 | A00 | Grob Attack-Keene Defence-Main Line |
| 1 g4 e5 2 Bg2 d5 3 c4 | A00 | Grob Attack-Spike-Hurst Attack |
| 1 g4 e5 2 h3 | A00 | Grob Attack-Macho Variation |
| 1 g4 e5 2 h3 d5 3 Bg2 c6 | A00 | Grob Attack-Macho Variation-Keene Variation |
| 1 g4 e5 2 h3 Nc6 | A00 | Grob Attack-Macho Variation-London Defence |
| 1 g4 f5 | A00 Explore | Grob Attack-Alessi Gambit |
| 1 g4 g5 | A00 Explore | Grob Attack-Double Grob/Symmetrical Variation |
| 1 g4 g5 2 f4 | A00 | Grob Attack-Double Grob-Coca-Cola Gambit |
| 1 h3 | A00 Explore | Clemenz Opening/Mead's/Basman's/de Klerk's Opening |
| 1 h3 e5 2 a3 | A00 | Clemenz Opening-Global Opening |
| 1 h3 e5 2 a3 d5 | A00 | Clemenz Opening-Global Opening-Creepy Crawly Variation |
| 1 h3 h5 2 g4 | A00 | Clemenz Opening-Spike Lee Gambit |
| 1 h4 | A00 Explore | Deprez/Kádas/Desprès Opening |
| 1 h4 a5 | A00 | Deprez Opening-Koola-Koola Variation |
| 1 h4 c5 2 b4 | A00 | Deprez Opening-Kádas Gambit #1 |
| 1 h4 d5 2 d4 c5 3 e3 | A00 | Deprez Opening-Myers Variation |
| 1 h4 d5 2 d4 c5 3 Nf3 cxd4 4 c3 | A00 | Deprez Opening-Kádas Gambit #2 |
| 1 h4 d5 2 Rh3 | A00 | Deprez Opening-Beginner's Trap |
| 1 h4 e5 2 d4 exd4 3 c3 | A00 | Deprez Opening-Kadas Gambit #3 |
| 1 h4 f5 2 e4 fxe4 3 d3 | A00 | Deprez Opening-Steinbok Gambit |
| 1 h4 g5 | A00 Explore | Deprez Opening-Schneider Gambit |
| 1 Na3 | A00 Explore | Sodium/Durkin's Attack |
| 1 Na3 e5 2 d3 Bxa3 3 bxa3 d5 4 e3 c5 5 Rb1 | A00 | Durkin's Attack-Celadon Variation |
| 1 Na3 e5 2 Nc4 Nc6 3 e4 f5 | A00 | Sodium Attack-Durkin Gambit |
| 1 Na3 g6 2 g4 | A00 | Durkin's Attack-Chenoboskian Variation |
| 1 Nc3 | A00 Explore | Dunst/Sleipner/Heinrichsen/Van Geet Opening |
| 1 Nc3 b5 | A00 Explore | Dunst Opening-Laroche Gambit |
| 1 Nc3 c5 2 b4 | A00 | Dunst Opening-Duesseldorf Gambit |
| 1 Nc3 c5 2 d4 cxd4 3 Qxd4 Nc6 4 Qh4 | A00 | Dunst Opening-Novosibirsk Opening |
| 1 Nc3 c5 2 Nf3 Nc6 3 d4 cxd4 4 Nxd4 | A00 | Dunst Opening-Sicilian 2 Knights Variation |
| 1 Nc3 c5 2 Rb1 | A00 | Dunst Opening-Twyble Attack |
| 1 Nc3 d5 2 d3 Nf6 3 g3 | A00 | Dunst Opening-Venezolana Variation |
| 1 Nc3 d5 2 e3 e5 3 d4 Bb4 | A00 | Dunst Opening-Sleipner Gambit |
| 1 Nc3 d5 2 e4 c6 | A00 | Dunst Opening-Caro-Kann Variation |
| 1 Nc3 d5 2 e4 c6 3 h3 | B10 | Dunst Opening-Caro-Kann Variation-St. Patrick's Attack |
| 1 Nc3 d5 2 e4 dxe4 3 Bc4 | A00 | Dunst Opening-Hector Gambit |
| 1 Nc3 d5 2 e4 dxe4 3 d3 | A00 | Van Geet Opening-Dunst-Perrenet Gambit |
| 1 Nc3 d5 2 e4 dxe4 3 f3 | A00 | Dunst Opening-Dougherty Gambit |
| 1 Nc3 d5 2 e4 dxe4 3 Nxe4 e5 | A00 | Dunst Opening-Gruenfeld Defence |
| 1 Nc3 d5 2 e4 dxe4 3 Nxe4 e5 4 f4 | A00 | Dunst Opening-Gruenfeld Defence-Steiner Gambit |
| 1 Nc3 d5 2 e4 Nf6 3 d3 dxe4 4 Bg5 | A00 | Dunst Opening-Myers Gambit |
| 1 Nc3 d5 2 f4 d4 3 Ne4 c5 | A00 | Dunst Opening-Melleby Gambit |
| 1 Nc3 d5 2 f4 d4 3 Ne4 e5 | A00 | Dunst Opening-Pfeiffer Gambit |
| 1 Nc3 d5 2 f4 d4 3 Ne4 e5 4 Nf3 | A00 | Dunst Opening-Pfeiffer Gambit-Sleipner Countergambit |
| 1 Nc3 d5 2 f4 d4 3 Ne4 f5 4 Nf2 Nf6 5 Nf3 c5 6 b4 | A00 | Dunst Opening-Jendrossek Gambit |
| 1 Nc3 d5 2 f4 e5 | A00 | Dunst Opening-Damhaug Gambit |
| 1 Nc3 d5 2 f4 g5 | A00 | Dunst Opening-Warsteiner Gambit |
| 1 Nc3 d6 2 f4 e5 3 fxe5 Nc6 | A00 | Dunst Opening-Hergert Gambit |
| 1 Nc3 e5 | A00 Explore | Dunst Opening-Reversed Nimzowitsch Variation |
| 1 Nc3 e5 2 a3 | A00 | Dunst Opening-Reversed Nimzowitsch Variation-Battambang Opening |
| 1 Nc3 e5 2 b3 d5 3 e4 dxe4 4 d3 | A00 | Dunst Opening-Reversed Nimzowitsch Variation-Gladbacher Gambit |
| 1 Nc3 e5 2 d4 exd4 3 Qxd4 Nc6 4 Qa4 | A00 | Dunst Opening-Reversed Nimzowitsch Variation-Reversed Scandinavian Variation |
| 1 Nc3 e5 2 e3 d5 3 Qh5 Be6 | A00 | Dunst Opening-Reversed Nimzowitsch Variation-Hulsemann Gambit |
| 1 Nc3 e5 2 e3 d5 3 Qh5 Nf6 | A00 | Dunst Opening-Reversed Nimzowitsch Variation-Liebig Gambit |
| 1 Nc3 e5 2 f4 exf4 3 e4 | A00 | Dunst Opening-Reversed Nimzowitsch Variation-Nowokunski Gambit |
| 1 Nc3 e5 2 Nf3 Bc5 | A00 | Dunst Opening-Reversed Nimzowitsch Variation-Billockus-Johansen Gambit |
| 1 Nc3 e5 2 Nf3 Nc6 3 d4 | A00 | Dunst Opening-Reversed Nimzowitsch Variation-Napoleon Attack |
| 1 Nc3 f5 2 e4 fxe4 3 d3 | A00 | Dunst Opening-Klüver Gambit |
| 1 Nc3 g6 2 h3 | A00 | Dunst Opening-Anti-Pirc Variation |
| 1 Nc3 Nc6 2 d4 d5 3 e4 dxe4 4 d5 | A00 | Dunst Opening-Berlin Gambit |
| 1 Nc3 Nf6 2 g4 | A00 | Dunst Opening-Tübingen Gambit |
| 1 Nc3 Nf6 2 Nb1 Ng4 3 Nc3 Ne3 4 Nb1 Nxf1 5 Nc3 Ng3 6 Nb1 Nxh1 7 Nc3 Ng3 8 Nb1 Ne4 9 Nc3 Ng5 10 Nb1 Nh3 11 Nc3 Nxg1 12 Nb1 Nh3 13 Nc3 Ng5 14 Nb1 Ne4 15 Nc3 Nf6 16 Nb1 Ng8 | A00 | Dunst Opening-Sandomierski Gambit |
| 1 Nc3 Nf6 2 Nb1 Nh5 3 Nc3 Ng3 4 Nb1 Nxh1 5 Nc3 Ng3 6 Nb1 Nxf1 7 Nc3 Ng3 8 Nb1 Nh5 9 Nc3 Nf4 10 Nb1 Nh3 11 Nc3 Nxg1 12 Nb1 Nh3 13 Nc3 Nf4 14 Nb1 Nh5 15 Nc3 Nf6 16 Nb1 Ng8 | A00 | Dunst Opening-Sandomierz Defence-Father Matthew Variant |
| 1 Nf3 | A04 Explore | Réti/Zukertort Opening |
| 1 Nf3 a5 | A04 Explore | Réti Opening-Ware Defence |
| 1 Nf3 a6 | A04 Explore | Réti Opening-St. George Defence |
| 1 Nf3 b5 | A04 Explore | Réti Opening-Polish Defence |
| 1 Nf3 b6 | A04 Explore | Réti Opening-Queenside Fianchetto Variation |
| 1 Nf3 c5 | A04 Explore | Réti Opening-Sicilian Invitation |
| 1 Nf3 c5 2 d4 cxd4 3 e3 | A04 | Réti Opening-Sicilian Invitation-Speelsmet Gambit |
| 1 Nf3 c5 2 g3 d5 3 Bg2 Nc6 4 d4 e6 5 0-0 | A49 | Réti Opening-Sicilian Invitation-Grünfeld Reversed |
| 1 Nf3 c5 2 Nc3 | A04 | Réti Opening-Sicilian Invitation-2 Knights Variation |
| 1 Nf3 c5 2 Nc3 Nc6 3 d4 cxd4 4 Nxd4 | A04 | Réti Opening-Sicilian Invitation-2 Knights Variation-Sicilian Variation |
| 1 Nf3 c6 | A04 Explore | Réti Opening-Slav Invitation |
| 1 Nf3 d5 | A06 Explore | Réti Opening-Queen Pawn/Zukertort Defence |
| 1 Nf3 d5 2 a4 | A06 Explore | Réti Opening-The Potato |
| 1 Nf3 d5 2 b3 | A06 Explore | Réti Opening-Queen Pawn Defence-Nimzowitsch-Larsen Attack |
| 1 Nf3 d5 2 b3 c5 3 c4 dxc4 4 e3 | A06 | Réti Opening-Queen Pawn Defence-Nimzowitsch-Larsen Attack-Paschmann Gambit |
| 1 Nf3 d5 2 b3 c5 3 c4 dxc4 4 Nc3 | A06 | Réti Opening-Queen Pawn Defence-Nimzowitsch-Larsen Attack-Regina-Nu Gambit |
| 1 Nf3 d5 2 b3 c5 3 e4 | A01 | Réti Opening-Queen Pawn Defence-Nimzowitsch-Larsen Attack-Norfolk Gambit 2/Accelerated Norfolk |
| 1 Nf3 d5 2 b3 Nf6 3 Bb2 c5 4 e4 | A01 | Réti Opening-Queen Pawn Defence-Nimzowitsch-Larsen Attack-Norfolk Gambit 1 |
| 1 Nf3 d5 2 b4 | A06 Explore | Réti Opening-Queen Pawn Defence-Santasiere's Folly |
| 1 Nf3 d5 2 c4 | A09 Explore | Réti Opening-Queen Pawn Defence-Réti Gambit |
| 1 Nf3 d5 2 c4 b5 | A09 Explore | Réti Opening-Queen Pawn Defence-Réti Gambit-Zilbermints Gambit |
| 1 Nf3 d5 2 c4 c6 3 b3 | A12 | Réti Opening-Réti Gambit-Anglo-Slav Variation-Bogoljubov Variation III |
| 1 Nf3 d5 2 c4 c6 3 b3 Bg4 | A12 | Réti Gambit-Anglo-Slav Variation-Bogoljubov Variation II |
| 1 Nf3 d5 2 c4 c6 3 b3 Nf6 4 Bb2 | A12 | Réti Opening-Réti Gambit-Anglo-Slav Variation-Bogoljubov Variation |
| 1 Nf3 d5 2 c4 c6 3 b3 Nf6 4 Bb2 Bf5 | A12 | Réti Gambit-Anglo-Slav Variation-Bogoljubov Variation-New York System |
| 1 Nf3 d5 2 c4 c6 3 b3 Nf6 4 Bb2 Bg4 | A12 | Réti Gambit-Anglo-Slav Variation-Bogoljubov Variation-Capablanca Variation |
| 1 Nf3 d5 2 c4 c6 3 b3 Nf6 4 Bb2 e6 5 g3 Be7 6 Bg2 0-0 7 0-0 | A12 | Réti Gambit-Anglo-Slav Variation-Bogoljubov Variation-Stonewall Line |
| 1 Nf3 d5 2 c4 c6 3 b3 Nf6 4 Bb2 g6 | A12 | Réti Gambit-Anglo-Slav Variation-Bogoljubov Variation-Bled Variation |
| 1 Nf3 d5 2 c4 c6 3 b3 Nf6 4 g3 Bf5 | A12 | Réti Gambit-Anglo-Slav Variation-Bogoljubov Variation III-London Defensive System |
| 1 Nf3 d5 2 c4 c6 3 b3 Nf6 4 g3 Bg4 | A12 | Réti Gambit-Anglo-Slav Variation-Bogoljubov Variation III-Torre System |
| 1 Nf3 d5 2 c4 d4 | A09 Explore | Réti Opening-Queen Pawn Defence-Réti Gambit-Advance Variation |
| 1 Nf3 d5 2 c4 d4 3 b4 | A09 | Réti Opening-Réti Gambit-Advance Variation-Polonaise Variation |
| 1 Nf3 d5 2 c4 d4 3 b4 c5 | A09 | Réti Opening-Advance Variation-Polonaise Variation-Michel Gambit |
| 1 Nf3 d5 2 c4 d4 3 e3 c5 4 b4 | A09 | Réti Opening-Réti Gambit-Advance Variation-Reversed Blumenfeld Gambit |
| 1 Nf3 d5 2 c4 d4 3 Rg1 | A09 | Réti Opening-Réti Gambit-Advance Variation-Penguin Variation |
| 1 Nf3 d5 2 c4 dxc4 | A09 Explore | Réti Opening-Queen Pawn Defence-Réti Gambit Accepted |
| 1 Nf3 d5 2 c4 dxc4 3 e3 Be6 | A09 | Réti Opening-Queen Pawn Defence-Réti Gambit Accepted-Keres Variation |
| 1 Nf3 d5 2 d3 | A06 Explore | Réti Opening-Queen Pawn Defence-Old Indian Attack |
| 1 Nf3 d5 2 e4 | A06 Explore | Réti Opening-Queen Pawn Defence-Tennison/Lemberg/Zukertort Gambit |
| 1 Nf3 d5 2 g3 | A07 Explore | Réti Opening-Queen Pawn Defence-Barcza Opening/King's Indian Attack |
| 1 Nf3 d5 2 g3 Bg4 3 Bg2 Nd7 | A07 | Réti Opening-Queen Pawn Defence-King's Indian Attack-Keres Variation |
| 1 Nf3 d5 2 g3 c5 | A07 Explore | Réti Opening-Queen Pawn Defence-King's Indian Attack-Sicilian Variation |
| 1 Nf3 d5 2 g3 c5 3 Bg2 | A08 Explore | Réti Opening-Queen Pawn Defence-King's Indian Attack-Sicilian Variation |
| 1 Nf3 d5 2 g3 c5 3 Bg2 Nc6 4 0-0 e6 5 d3 Nf6 6 Nbd2 Be7 7 e4 0-0 (8 Re1) | A08 | Réti Opening-King's Indian Attack-Sicilian Variation-French Variation |
| 1 Nf3 d5 2 g3 e5 | A07 Explore | Réti Opening-Queen Pawn Defence-Omega-Delta Gambit |
| 1 Nf3 d5 2 g3 g6 | A07 Explore | Réti Opening-Queen Pawn Defence-Double Fianchetto/Barcza Variation |
| 1 Nf3 d5 2 g3 g6 3 Bg2 Bg7 4 0-0 e5 5 d3 Ne7 | A07 | Réti Opening-King's Indian Attack-Double Fianchetto Variation-Pachmann System |
| 1 Nf3 d5 2 g3 Nc6 3 Bg2 e5 4 d3 | A07 | Réti Opening-Queen Pawn Defence-King's Indian Attack-Pirc Variation |
| 1 Nf3 d5 2 g3 Nf6 3 Bg2 c5 4 d4 | A07 | Réti Opening-Queen Pawn Defence-King's Indian Attack-Grünfeld Variation |
| 1 Nf3 d5 2 g3 Nf6 3 Bg2 c6 4 0-0 Bg4 | A07 | Réti Opening-Queen Pawn Defence-King's Indian Attack-Yugoslav Variation |
| 1 Nf3 d5 2 Nc3 | A06 Explore | Réti Opening-Queen Pawn Defence-Reversed Mexican Defence |
| 1 Nf3 d5 2 Rg1 | A06 Explore | Réti Opening-Queen Pawn Defence-Ampel Variation |
| 1 Nf3 d6 | A04 Explore | Réti Opening-Wade Defence/Pirc Invitation |
| 1 Nf3 d6 2 d4 Bg4 3 c4 Nd7 4 Qb3 Rb8 | A41 | Réti Opening-Wade Defence-Chigorin Plan |
| 1 Nf3 d6 2 d4 e5 | A04 | Réti Opening-Wade Defence-Vos Gambit |
| 1 Nf3 d6 2 e4 Bg4 | A04 | Réti Opening-Pirc Invitation-Wade-Tartakower Defence |
| 1 Nf3 e5 | A04 Explore | Réti Opening-Ross Gambit |
| 1 Nf3 e5 2 Nxe5 Nc6 3 Nxc6 dxc6 | A04 | Réti Opening-Ross Gambit-The Walrus |
| 1 Nf3 e6 | A04 Explore | Réti Opening-Queen's Gambit Invitation |
| 1 Nf3 e6 2 c4 a6 3 Nc3 c5 4 g3 b5 | A04 | Réti Opening-Queen's Gambit Invitation-Shabulov Gambit |
| 1 Nf3 f5 | A04 Explore | Réti Opening-Dutch Variation |
| 1 Nf3 f5 2 d3 | A04 | Réti Opening-Dutch Variation-Improved Lisitsin Variation |
| 1 Nf3 f5 2 d3 Nf6 3 e4 | A04 | Réti Opening-Dutch Variation-Lisitsin Gambit Deferred |
| 1 Nf3 f5 2 e4 | A04 | Réti Opening-Dutch Variation-Pirc-Lisitsin Gambit |
| 1 Nf3 f6 | A04 Explore | Zukertort Opening-Arctic Defence |
| 1 Nf3 f6 2 e4 Nh6 3 d4 Nf7 | A04 | Zukertort Opening-Arctic Defence-Drunken Knight Variation |
| 1 Nf3 g5 | A04 | Réti Opening-Herrström Gambit |
| 1 Nf3 g6 | A04 Explore | Réti Opening-Kingside Fianchetto Variation |
| 1 Nf3 h6 | A04 Explore | Réti Opening-Basman Defence |
| 1 Nf3 Na6 2 e4 c5 | A04 | Réti Opening-Zukertort Defence-Sicilian Knight Variation |
| 1 Nf3 Na6 2 e4 Nh6 | A04 | Réti Opening-Zukertort Defence-Drunken Cavalry Variation |
| 1 Nf3 Nc6 | A04 | Réti Opening-Black Mustang Defence |
| 1 Nf3 Nf6 | A05 Explore | Réti Opening-Symmetrical Variation |
| 1 Nf3 Nf6 2 a4 g6 3 b4 | A05 | Réti Opening-Symmetrical Variation-Myers Polish Attack |
| 1 Nf3 Nf6 2 b3 | A05 Explore | Réti Opening-Symmetrical Variation-Nimzo-Larsen Variation |
| 1 Nf3 Nf6 2 b3 g6 3 Bb2 Bg7 4 g3 0-0 5 Bg2 d6 6 0-0 | A49 | Réti Opening-Symmetrical Variation-Nimzo-Larsen Variation-Double Fianchetto Attack |
| 1 Nf3 Nf6 2 e3 | A05 Explore | Réti Opening-Symmetrical Variation-Quiet System |
| 1 Nf3 Nf6 2 e4 | A05 Explore | Réti Opening-Symmetrical Variation-Lemberg Gambit |
| 1 Nf3 Nf6 2 g3 | A05 Explore | Réti Opening-King's Indian Attack |
| 1 Nf3 Nf6 2 g3 b5 | A05 | Réti Opening-King's Indian Attack-Spassky Variation |
| 1 Nf3 Nf6 2 g3 g5 3 b4 | A05 | Réti Opening-King's Indian Attack-Smyslov Variation |
| 1 Nf3 Nf6 2 g3 g6 | A05 | Réti Opening-King's Indian Attack-Barcza Defence |
| 1 Nf3 Nf6 2 g3 g6 3 b3 Bg7 4 Bb2 0-0 5 Bg2 d6 6 0-0 | A05 | Réti Opening-King's Indian Attack-Barcza Defence-Fianchetto Variation |
| 1 Nf3 Nf6 2 g3 g6 3 b4 | A05 | Réti Opening-King's Indian Attack-Barcza Defence-Smyslov Variation |
| 1 Nf3 Nf6 2 g3 g6 3 Bg2 Bg7 4 0-0 0-0 5 d3 d5 | A05 | Réti Opening-King's Indian Attack-Barcza Defence-Wahls Defence |
| 1 Nf3 Nf6 2 Nc3 Nc6 | A05 | Réti Opening-Symmetrical Variation-All Knights Opening |
| 1 Nf3 Nh6 2 d4 g6 | A04 | Réti Opening-Zukertort Defence-Kingside Variation |
| 1 Nh3 | A00 Explore | Paris/Amar Opening |
| 1 Nh3 d5 2 f3 e5 3 e4 f5 | A00 | Amar Opening-Paris Gambit |
| 1 Nh3 d5 2 g3 e5 3 f4 | A00 | Amar Opening-Paris Gambit |
| 1 Nh3 d5 2 g3 e5 3 f4 Bxh3 4 Bxh3 exf4 | A00 | Amar Opening-Paris Gambit-Amar Gambit |
| 1 Nh3 d5 2 g3 e5 3 f4 Bxh3 4 Bxh3 exf4 5 0-0 fxg3 6 hxg3 | A00 | Amar Opening-Paris Gambit-Amar Gambit-Gent Gambit |
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