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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 Pawn game: 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 and Belgrade Gambit 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 - various 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 - Nimzowitsch, O'Kelly & others B27-29 1.e4 c5 2.Nf3
Sicilian - Rossolimo                    B30-31 1.e4 c5 2.Nf3 Nc6; 3.Bb5 
Sicilian - Sveshnikov & Kalashnikov  B32-33 1.e4 c5; 2.Nf3 Nc6; 3.d4 cxd4; 4.Nxd4 Nf6 5.Nc3 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 6Be2 and minor lines B90-93 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6
Sicilian - Naydorf 6Be3
B90
1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Be3
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 (fresher lines) 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.Bg5
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
Catalan 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 D80-84 & D90-99 1.d4 Nf6 2.c4 g6 3.Nc3 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
King's Indian - minor lines E70-79 1.d4 Nf6 2.Nf3 g6 3.c4 Bg7 4.e4 d6
King's Indian - Samisch E80-89 1.d4 Nf6 2.Nf3 g6 3.c4 Bg7 4.e4 d6 5.f3
King's Indian - 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)
Dunst 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