d2-d4:Queen's pawn opening d7-d5:Queen's pawn/stonewall attack c2-c4 e7-e6:Queen's gambit declined b1-c3 g8-f6 c1-g5 b8-d7 f8-b4 e2-e3:Queen's gambit/Cambridge Springs c7-c6 g1-f3 d8-a5 b1-d2 g1-f3 g8-f6 e2-e3 c7-c6 b1-d2:Queen's gambit declined/Slav g7-g6 g2-g3 d5xc4:Queen's gambit accepted e2-e4 c7-c5 d4-d5 g8-f6 b1-c3 b7-b5:Queen's gambit accepted/Linares f7-f5:Queen's gambit accepted/Schwartz defence c1-f4:Queen's pawn/Mason variation c1-g5:Levitsky attack (Queen's bishop attack) h7-h6 g5-h4 c7-c6 g1-f3 b1-c3:Queen's pawn/Chigorin variation g1-f3:Queen's pawn game g8-f6 c2-c4 g7-g6:King's Indian defence b1-c3 f8-g7 e2-e4 d7-d6 g1-f3 O-O f1-e2 e7-e5 O-O b8-a6 b8-c6 d4-d5 e7-e5:Budapest defence declined d4xe5 f6-g4 f6-e4 d7-d6:Old Indian defence b1-c3 g1-f3 g2-g3 c7-c5 d4-d5:Benoni defence d7-d6:Benoni defence/Hromodka system e7-e5:Czech Benoni defence b1-c3 d7-d6 g7-g6 b1-c3 e7-e6 b1-c3 b7-b5:Benko gambit c4xb5:Benko gambit half accepted a7-a6 b5xa6:Benko gambit accepted c8xa6 b1-c3 d7-d6 e2-e3 e7-e6 b1-c3 g1-f3 c7-c5 d7-d6 e7-e6 e2-e3 g2-g3 c1-f4 c1-g5:Queen's pawn/Torre attack b7-b6:Queen's Indian defence e2-e3 g2-g3 c1-f4 g7-g6:King's Indian/East Indian defence c1-f4:King's Indian/London system c1-g5:King's Indian/Torre attack f8-g7 g2-g3:King's Indian/fianchetto c1-g5:Trompovsky attack c7-c5 e7-e6 e2-e4 g7-g6 e2-e4 g5xf6 e7xf6 e2-e3:Stonewall attack system c7-c5 d7-d5 e7-e6 g7-g6 f2-f3:Paleface attack f2-f4:Canard opening? g2-g3 c2-c3 e7-e6 c2-c4 c7-c5 d4-d5 e6xd5 c4xd5 b7-b6:Keres defence f8-b4:Queen's pawn/Franco-Indian defence b7-b5:Polish defence b7-b6:Queen's pawn/English defence g7-g6:Modern defence c2-c4 f8-g7 e2-e4 d7-d6 c7-c5 b1-c3 g1-f3 d7-d6 g1-f3 f8-g7 g8-f6 e2-e4 f8-g7 c2-c4 d7-d6 b8-c6:Queen's pawn/Lundin defence? e2-e4:Queen's pawn-King's pawn game e7-e5 d4-d5 d7-d6:Queen's pawn game c2-c4:Old Indian defence g7-g6 b1-c3:Modern defence f8-g7 e2-e4:Modern defence/Averbakh system g1-f3 c8-g4 e7-e5:Old Indian defence? d4xe5:Old Indian/exchange g1-f3 e2-e4 g1-f3 g7-g6 c8-g4:Old Indian/Tartakower c7-c5:Old Benoni defence d4-d5 d7-d6 e7-e6:Old Benoni/Franco-Benoni defence f7-f5:Old Benoni/Mujannah formation g8-f6 b1-c3 d8-a5:Woozle defence g1-f3 c2-c4 e7-e5:Old Benoni defence d4xc5:Rodney Dangerfield defence e7-e6 b1-c3 f8xc5 c3-e4 g8-f6 e4xc5 d8-a5 g1-f3:Benoni-Torre g8-f6 d4-d5 b7-b5 f7-f5:Dutch e7-e5:Queen's pawn/Charlick gambit? c7-c6 e2-e4 d7-d5 b1-c3 d5xe4:Caro-Kann defence e2-e4:King's pawn opening c7-c5:Sicilian defence b1-c3:Sicilian/closed b8-c6 g2-g3 f2-f4 f1-b5 g7-g6:Sicilian/Nimzovich-Rossolimo attack g1-e2:Sicilian/chameleon variation g1-f3 d7-d6 g1-e2 e7-e6 g1-f3:Sicilian defence/King's knight variation b8-c6:Sicilian defence c2-c3:Sicilian/Alapin's variation g8-f6 e4-e5 f6-d5 d2-d4 c5xd4 f3xd4 e7-e5 g8-f6 d7-d6:Sicilian/Kopec variation e7-e6 b1-c3 c2-c3:Sicilian/Alapin's variation g7-g6:Sicilian/Hungarian variation b7-b6:Sicilian/Katalimov variation d8-c7:Sicilian/Quinteros variation a7-a6:Sicilian/O'Kelly variation g8-f6:Sicilian/Nimzovich-Rubinstein variation f1-c4:Sicilian/Philidor e7-e6 b8-c6 g1-e2:Sicilian/Keres variation? c2-c3:Sicilian/Alapin's variation g8-f6 g7-g6 b7-b6 b2-b3 b2-b4:Sicilian/wing gambit? c5xb4 a2-a3 d7-d5 e4xd5 d8xd5 c1-b2 c2-c4 d2-d3 g2-g3:Sicilian/Steinitz variation d2-d4:Sicilian/Smith-Morra gambit? c5xd4 g1-f3 c2-c3 f2-f4:Sicilian/Grand Prix attack f1-e2:Slow Sicilian e7-e5:King's pawn game g1-f3:King's knight opening b8-c6 f1-c4 f8-c5 f1-b5:Spanish opening a7-a6 b5-a4 d2-d4:Scottish game e5xd4 f3xd4 g8-f6 f8-c5 d7-d6:Philidor's defence d2-d4 f1-c4 d7-d5:Queen's pawn counter-gambit f7-f6:Damiano's defence d8-e7:Brazilian (Gunderam) defence? d8-f6:Greco defence? g8-f6:Petrov's defence f7-f5:Latvian counter-gambit? f1-c4:Bishop's opening d2-d4 e5xd4:Centre game c2-c3:Danish gambit d1xd4 b1-c3:Vienna game f2-f4:King's gambit e5xf4:King's gambit accepted g1-f3 g7-g5 c2-c3:King's pawn/Lopez opening d2-d3:King's pawn/Indian opening g1-e2:Alapin's opening a2-a3:Mengarini's opening d1-f3:Napoleon's opening? f2-f3:King's head opening d1-h5:Patzer opening g7-g6:Robatsch opening d2-d4 f8-g7:Robatsch defence b1-c3 d7-d6 g1-f3 g8-f6:Norwegian defence e4-e5 f6-h5 g2-g4 h5-g7 c7-c6 g1-f3 d7-d6 b1-c3:Robatsch opening? f8-g7 d7-d6:Pirc d2-d4 g7-g6:Pirc-Robatsch g8-f6:Pirc defence b1-c3 g7-g6 c7-c6 e7-e5 f2-f3 f1-d3 c7-c6 e7-e6:French defence d2-d4 e4-e5:French/Steinitz attack d2-d3:French/King's Indian attack b2-b3:Reti (Spielmann) variation c2-c4:French/Steiner variation f2-f4:French/Labourdonnais variation b1-c3 g1-f3 d1-e2:French/Chigorin variation c2-c4 b7-b6:Owen defence? d2-d4 e7-e6 c8-a6:Guatemala defence? a7-a6:St.George defence? h7-h6:Carr's defence? b8-c6:King's pawn/Nimzovich defence d2-d4 d7-d5 e7-e5 g1-f3 d7-d5:Scandinavian defence? e4xd5 g8-f6 c2-c4 d2-d4 f1-b5 d8xd5 b1-c3 d5-a5 d5-d6 g8-f6:Alekhine's defence? d2-d3:Alekhine's defence/Maroczy variation? e4-e5 f6-d5 d2-d4 c7-c6:Caro-Kann defence b1-c3 d7-d5 g1-f3 d2-d4 d7-d5 b1-c3 d5xe4 g8-f6:Caro-Masi defence g7-g6 d2-d3:Caro-Kann/closed c2-c4:Caro-Kann/anti-Caro-Kann defence e7-e5 d7-d5:Caro-Kann/anti-anti-Caro-Kann defence g7-g5:Borg defence? d2-d4 h7-h6 g1-f3:Reti opening? d7-d5 g2-g3:Reti King's Indian attack b2-b3 c2-c4 d5xc4:Reti accepted d7-d6 g8-f6 g7-g6 d2-d4 f8-g7 c7-c5:Reti plus English g2-g3 g7-g6 b8-c6 e7-e6:Reti opening f7-f5:Reti Dutch g7-g6:Reti King's Indian b8-c6:Reti opening c2-c4:English b7-b6 f7-f5:English/Anglo-Dutch defence g7-g6 c7-c6:Caro-Kann defensive system g1-f3 d7-d5 e2-e3 g2-g3 d1-c2 g8-f6:English, New York defensive system g1-f3:English opening b1-c3:English Anglo-Gruenfeld d7-d5 c4xd5 f6xd5 g2-g3 g1-f3 c7-c6 g7-g6 e7-e6 g1-f3 e2-e4 e7-e6:English opening g8-f6:English, Anglo-Indian defence e7-e5:English opening g2-g3 g1-f3 g2-g3 b1-c3 g8-f6 b8-c6:English, Sicilian reversed g1-f3:English/3 knights system d7-d6 f7-f5 c7-c5:English symmetrical g1-f3 g2-g3 b1-c3 g2-g3:Benko's opening? d7-d5 f1-g2 e7-e5 f1-g2 b2-b3:Nimzovich-Larsen attack? c7-c5:Nimzovich-Larsen/English d7-d5:Nimzovich-Larsen/classical e7-e5:Nimzovich-Larsen/modern f7-f5:Nimzovich-Larsen/Dutch g8-f6:Nimzovich-Larsen/Indian d2-d3:Mieses opening? e2-e3:Van't Kruijs opening? e7-e5:Amsterdam attack g2-g4:Grob's attack? b1-c3:Dunst opening? c2-c3:Saragossa opening? h2-h3:Clemenz opening? a2-a3:Anderssen's opening? f2-f3:Gedult's opening? h2-h4:Kadas opening? b2-b4:Polish opening? b1-a3:Durkin's attack? g1-h3:Amar opening? f2-f4:Bird's opening? d7-d5 d2-d4 a2-a4:Ware opening?