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| 1.e4 e5 King's Pawn Game | |||
| Bishop's opening | C23-24 | 1.e4 e5 2.Bc4 | |
| Vienna game | C25-29 | 1.e4 e5 2.Nc3 | |
| King's Gambit | C30-39 | 1.e4 e5 2.f4 | |
| King's Knight opening: various | C40 | 1.e4 e5 2.Nf3 f5 (2..d5, 2..f6, 2..Qe7) | |
| Philidor | C41 | 1.e4 e5 2.Nf3 d6 | |
| Petrov | C42-43 | 1.e4 e5 2.Nf3 Nf6 | |
| Scotch | C44-45 | 1.e4 e5 2.Nf3 Nc6 3.d4 | |
| Three Knights | C46 | 1.e4 e5 2.Nf3 Nc6 3.Nc3 | |
| Four Knights | C47-49 | 1.e4 e5 2.Nf3 Nc6 3.Nc3 Nf6 | |
| Italian Game & Two Knights | C50-59 | 1.e4 e5 2.Nf3 Nc6 3.Bc4 | |
| Ruy Lopez - minor variations | C60-69 | 1.e4 e5 2.Nf3 Nc6 3.Bb5 (without 3..a6 4.Ba4) | |
| Ruy Lopez - main variations | C70-99 | 1.e4 e5 2.Nf3 Nc6 3.Bb5 a6 4.Ba4 | |
| 1.e4 Semi Open Game | |||
| Nimzowitsch | B00 | 1.e4 Nc6 | |
| Scandinavian | B01 | 1.e4 d5 | |
| Alechine | B02-05 | 1.e4 Nf6 | |
| Pirc & Modern | B06-09 | 1.e4 d6 & 1.e4 g6 | |
| Caro Kann | B10-19 | 1.e4 c6 | |
| French - minor variations | C00-02 | 1.e4 e6 | |
| French Tarrasch | C03-09 | 1.e4 e6 2.d4 d5 3.Nd2 | |
| French 3.Nc3 | C10-19 | 1.e4 e6 2.d4 d5 3.Nc3 | |
| Sicilian - minor variations | B20-21 | 1.e4 c5 | |
| Sicilian - Morra Gambit | B21 | 1.e4 c5 2.d4 | |
| Sicilian - Alapin | B22 | 1.e4 c5 2.c3 | |
| Sicilian - Closed variation | B23-26 | 1.e4 c5 2.Nc3 | |
| Sicilian - Rossolimo | B30-31 | 1.e4 c5 2.Nf3 Nc6; 3.Bb5 | |
| Sicilian - Sveshnikov & Kalashnikov | B32-33 | 1.e4 c5; 2.Cf3 Cc6; 3.d4 cxd4; 4.Cxd4 Cf6 5.Cc3 e5 (& 4...e5) | |
| Sicilian - Accelerated Dragon | B34-39 | 1.e4 c5; 2.Nf3 Nc6; 3.d4 cxd4; 4.Nxd4 g6 | |
| Sicilian - e6 variations | B40-49 | 1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 | |
| Sicilian - Moscow | B51-52 | 1.e4 c5 2.Nf3 d6 3.Bb5+ | |
| Sicilian - Richter Rauzer | B60-69 | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 | |
| Sicilian - Dragon | B70-79 | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 | |
| Sicilian - Scheveningen | B80-85 | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 e6 | |
| Sicilian - Sozin | B86-89 & B57 | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bc4 | |
| Sicilian - Naydorf | B90-93 | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 | |
| Sicilian - Naydorf 6.Bg5 | B94-99 | 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 | |
| 1.d4 - Queen's Pawn Game | |||
| 1.d4 d5 - minor variations | D00-09 | 1.d4 d5 | |
| Slav | D10-19 | 1.d4 d5 2.c4 c6 | |
| Queen's Gambit accepted | D20-29 | 1.d4 d5 2.c4 dxc4 | |
| Queen's Gambit declined (various) | D30-39 | 1.d4 d5 2.c4 e6 | |
| Queen's Gambit declined (classical) | D50-69 | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Ag5 | |
| Semi Tarrasch | D40-D42 | 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c5 | |
| Semislav | D43-49 | 1.d4 d5 2.c4 c6 3.Nf3 Nf6 5.Nc3 e6 | |
| Natalan | E00-09 | 1.d4 d5 2.c4 e6 3.g3 | |
| Dutch | A80-99 | 1.d4 f5 | |
| Tromposki | A45 & D00 | 1.d4 Nf6 2.Bg5 | |
| 1.d4 - Indian Defences | |||
| Grunfeld - Exchange | D85-89 | 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 | |
| Grunfeld - Others | D70-84 & D90-99 | 1.d4 Nf6 2.c4 g6 3.Nc3 (3.g3 3.f3 3.Nf3) d5 | |
| Queen's Indian | E12-19 | 1.d4 Nf6 2.c4 e6 3.Nf3 b6 | |
| Nimzo Indian (without 4.e3) | E20-39 | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 | |
| Nimzo Indian (4.e3) | E40-59 | 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 | |
| King's Indian - Fianchetto | E60-69 | 1.d4 Nf6 2.Nf3 g6 3.c4 Bg7 4.g3 00 5.Bg2 d6 | |
| Est Indiana - minor variations | E70-79 | 1.d4 Nf6 2.Nf3 g6 3.c4 Bg7 4.e4 d6 | |
| Est Indiana - Samisch | E80-89 | 1.d4 Nf6 2.Nf3 g6 3.c4 Bg7 4.e4 d6 5.f3 | |
| Est Indiana - Nf3 variations | E90-99 | 1.d4 Nf6 2.Nf3 g6 3.c4 Bg7 4.e4 d6 5.Nf3 | |
| Budapest Gambit | A51-52 | 1.d4 Nf6 2.c4 e5 | |
| Benko Gambit | A57-59 | 1.d4 Nf6 2.c4 c5 3.d5 b5 | |
| Modern Benoni | A60-79 | 1.d4 Nf6 2.c4 c5 3.d5 e6 | |
| Unusual First Move (not 1.e4 & 1.d4) | |||
| 1.Nc3 | A00 | 1.Nc3 | |
| Sokolsky & Grob | A00 | 1.b4 1.g4 | |
| Larsen Attack | A01 | 1.b3 | |
| Bird | A02-03 | 1.f4 | |
| 1.Nf3 Reti | A04-09 | 1.Nf3 | |
| English - 1..c6 | A11-12 | 1.c4 c6 | |
| English - 1...Nf6 | A15-19 | 1.c4 Nf6 | |
| English - 1..e5 | A20-29 | 1.c4 e5 | |
| English - 1..c5 | A30-39 | 1.c4 c5 | |