A00Irregular openings A01Nimzovich-Larsen attack A03Bird's opening A06Reti opening A08Reti: King's Indian attack A09Reti opening A10English opening A12English: Caro-Kann defensive system A13English opening A14English: Neo-Catalan declined A15English, Anglo-Indian defense A17English opening A18English: Mikenas-Carls A19English: Mikenas-Carls, Sicilian A24English opening A26English: Sicilian reversed A27English: three knights system A29English: four knights A30English: symmetrical A31English: symmetrical, Benoni formation A38English: symmetrical A39English: symmetrical, main line A42Queen's pawn A44Old Benoni defence A48Queen's pawn game A49King's Indian: fianchetto A50Queen's pawn game A51Budapest defence declined A52Budapest defence A53Old Indian defence A54Old Indian: Ukrainian A55Old Indian: main line A56Benoni defence A57Benko gambit A58Benko gambit accepted A59Benko gambit A64Benoni defence A69Benoni A79Benoni: classical A80Dutch A86Dutch defence A89Dutch: Leningrad, main A92Dutch defence A93Dutch: stonewall, Botwinnik A95Dutch: stonewall A96Dutch: classical A99Dutch: Ilyin-Genevsky B00King's pawn opening B01Scandinavian defence B03Alekhine's defence B05Alekhine's defence: modern B06Robatsch (modern) defence B07Pirc defence B08Pirc: classical (two knights) B09Pirc: Austrian attack B10Caro-Kann defence B11Caro-Kann: two knights B12Caro-Kann defence B13Caro-Kann: exchange B14Caro-Kann: Panov-Botvinnik B15Caro-Kann defence B16Caro-Kann: Bronstein-Larsen B17Caro-Kann: Steinitz B19Caro-Kann: classical B20Sicilian defence B21Sicilian: Grand Prix attack B22Sicilian: Alapin's B26Sicilian: closed B27Sicilian defence B28Sicilian: O'Kelly B29Sicilian: Nimzovich-Rubinstein B33Sicilian defence B39Sicilian: accelerated fianchetto B40Sicilian defence B43Sicilian: Kan B44Sicilian defence B49Sicilian: Taimanov B50Sicilian B52Sicilian: Canal-Sokolsky B53Sicilian, Chekhover B54Sicilian B55Sicilian: Prins, Venice attack B56Sicilian B57Sicilian: Sozin B58Sicilian: classical B59Sicilian: Boleslavsky B69Sicilian: Richter-Rauzer B74Sicilian: dragon B79Sicilian: dragon, Yugoslav B85Sicilian: Scheveningen B86Sicilian: Sozin attack B89Sicilian: Sozin B99Sicilian: Najdorf C00French defence C01French: exchange C02French: advance C03French: Tarrasch C04French: Tarrasch, Guimard C06French: Tarrasch, closed C09French: Tarrasch, open C10French: Paulsen C11French defence C12French: MacCutcheon C14French: classical C15French: Winawer (Nimzovich) C19French: Winawer, advance C20King's pawn game C22Centre game C23Bishop's opening C24Bishop's opening: Berlin defence C25Vienna game C26Vienna: Falkbeer C28Vienna game C29Vienna gambit C30King's gambit C31KGD: Falkbeer counter-gambit C32KGD: Falkbeer C33King's gambit accepted C34King's knight's gambit C35KGA: Cunningham defence C36KGA: Abbazia defence C38KGA: Quaade gambit C39King's knight's gambit C40King's knight opening C41Philidor's defence C42Petrov's defence C43Petrov: modern (Steinitz) attack C44King's pawn game C45Scotch game C46Three knights game C47Four knights: Scotch C48Four knights: Spanish C49Four knights: double Ruy Lopez C50King's pawn game C51Evans gambit declined C52Evans gambit C54Giuoco Piano C59Two knights defence C60Ruy Lopez (Spanish opening) C61Ruy Lopez: Bird's defence C62Ruy Lopez: old Steinitz defence C63Ruy Lopez: Schliemann defence C64Ruy Lopez: classical (Cordel) defence C66Ruy Lopez: Berlin defence C67Ruy Lopez: Berlin defence, open C69Ruy Lopez: exchange C70Ruy Lopez C76Ruy Lopez: modern Steinitz defence C77Ruy Lopez: Morphy defence C78Ruy Lopez C79Ruy Lopez: Steinitz defence deferred C80Ruy Lopez: open (Tarrasch) defence C81Ruy Lopez: open, Howell attack C82Ruy Lopez: open C83Ruy Lopez: open, classical defence C84Ruy Lopez: closed defence C85Ruy Lopez: Exchange doubly deferred C87Ruy Lopez: Worrall attack C88Ruy Lopez: closed C89Ruy Lopez: Marshall counter-attack C92Ruy Lopez: closed C93Ruy Lopez: closed, Smyslov defence C99Ruy Lopez: closed, Breyer D00Queen's pawn game D01Richter-Veresov attack D02Queen's pawn game D03Torre attack (Tartakower) D05Queen's pawn game D06Queen's Gambit D07QGD: Chigorin defence D09QGD: Albin counter-gambit D10QGD Slav defence D12QGD Slav D14QGD Slav: exchange D15QGD Slav D16QGD Slav accepted: Alapin D17QGD Slav: Czech defence D19QGD Slav: Dutch D21Queen's gambit accepted D22QGA: Alekhine defence D26Queen's gambit accepted D29QGA: classical D31Queen's gambit declined D34QGD: Tarrasch defence D35QGD: 3...Nf6 D36QGD: exchange, positional line D37QGD: 4.Nf3 D38QGD: Ragozin D39QGD: Ragozin, Vienna D42QGD: Semi-Tarrasch D49QGD semi-Slav D53QGD D54QGD: Anti-neo-orthodox D55QGD D57QGD: Lasker defence D59QGD: Tartakower (Makagonov-Bondarevsky) D69QGD: Orthodox defence D79Neo-Gruenfeld D84Gruenfeld defence D85Gruenfeld: exchange D86Gruenfeld: exchange, classical D93Gruenfeld: exchange, Spassky D99Gruenfeld E00Queen's pawn game E01Catalan: closed E02Catalan: open E03Catalan: open, Alekhine E04Catalan: open E05Catalan: open, classical E09Catalan: closed E10Queen's pawn game E11Bogo-Indian defence E12Queen's Indian defence E13Queen's Indian: main line E15Queen's Indian E16Queen's Indian: Capablanca E17Queen's Indian E19Queen's Indian: old main line E20Nimzo-Indian defence E21Nimzo-Indian: three knights E23Nimzo-Indian: Spielmann E29Nimzo-Indian: Saemisch E31Nimzo-Indian: Leningrad E33Nimzo-Indian: classical E37Nimzo-Indian: classical, Noa E38Nimzo-Indian: classical E39Nimzo-Indian: classical, Pirc E41Nimzo-Indian E42Nimzo-Indian (Rubinstein) E44Nimzo-Indian: Fischer E59Nimzo-Indian E61King's Indian defence E62King's Indian: fianchetto E63King's Indian: fianchetto, Panno E66King's Indian: fianchetto, Yugoslav E69King's Indian: fianchetto E73King's Indian E75King's Indian: Averbakh E79King's Indian: Four pawns attack E89King's Indian: Saemisch E91King's Indian E93King's Indian: classical E99King's Indian: orthodox