A00	Anderssen's Opening	Romford counter-gambit
A00	Crab Opening	Romford counter-gambit
A00	Ware (Meadow Hay) Opening	Romford counter-gambit
A01	Nimzovich-Larsen attack	Polish Variation
A01	Nimzovich-Larsen attack	Symmetrical Variation
A01	Nimzovich-Larsen attack	English Variation
A01	Nimzovich-Larsen attack	Classical Variation
A01	Nimzovich-Larsen attack	Modern Variation
A01	Nimzovich-Larsen attack	Dutch Variation
A01	Nimzovich-Larsen attack	Indian Variation
A01	Nimzovich-Larsen attack	Romford counter-gambit
A00	Polish	Outflank Variation
A00	Polish	Tuebingen Variation
A00	Polish (Sokolsky) opening	
A00	Saragossa Opening	Romford counter-gambit
A10	English	Jaenisch gambit
A36	English	Symmetrical, Botvinnik system Reversed
A36	English	Symmetrical, Botvinnik system
A37	English	Symmetrical, Botvinnik system Reversed
A38	English	Symmetrical, Main line with b3
A38	English	Symmetrical, Main line with d3
A39	English	Symmetrical, Main line with d4
A38	English	Symmetrical Variation
A37	English	Symmetrical Variation
A36	English	ultra-Symmetrical Variation
A36	English	Symmetrical Variation
A35	English	Symmetrical, Four knights system
A35	English	Symmetrical Variation
A34	English	Symmetrical, Rubinstein system
A34	English	Symmetrical Variation
A34	English	Symmetrical, Three knights system
A34	English	Symmetrical Variation
A33	English	Symmetrical, Geller Variation
A33	English	Symmetrical Variation
A32	English	Symmetrical Variation
A31	English	Symmetrical, Benoni formation
A30	English	Symmetrical, hedgehog, flexible formation
A30	English	Symmetrical, hedgehog system
A30	English	Symmetrical Variation
A12	English	Caro-Kann defensive system, Bogolyubov Variation
A12	English	New York (London) defensive system
A12	English	Capablanca's Variation
A12	English	Bled Variation
A12	English	Caro-Kann defensive system
A12	English	London defensive system
A12	English	Torre defensive system
A12	English	Caro-Kann defensive system
A11	English	Caro-Kann defensive system
A21	English, Kramnik-Shirov counterattack	Mikenas-Carls, Sicilian Variation
A21	English, Troeger defense	Mikenas-Carls, Sicilian Variation
A21	English, Keres Variation 	Mikenas-Carls, Sicilian Variation
A21	English, Smyslov defense	Mikenas-Carls, Sicilian Variation
A21	English Opening	Mikenas-Carls, Sicilian Variation
A26	English	Botvinnik system
A26	English	Closed system
A25	English	Closed system (without ...d6)
A25	English	Closed, Hort Variation
A25	English	Closed, Taimanov Variation
A25	English	Closed, 5.Rb1 Taimanov Variation
A25	English	Closed, 5.Rb1
A25	English	Closed system
A28	English	Four knights, Marini Variation
A28	English	Four knights, Capablanca Variation
A28	English	Bradley Beach Variation
A28	English	Nenarokov Variation
A28	English	Four knights, Romanishin Variation
A28	English	Four knights, Stean Variation
A28	English	Four knights, 4.e3
A28	English	Four knights, Nimzovich Variation
A29	English	Four knights, kingside Fianchetto
A28	English	Four knights system
A27	English	Three knights system
A25	English	Sicilian Reversed
A22	English	Bremen, Smyslov system
A23	English	Bremen system, Keres Variation
A22	English	Bremen, reverse Dragon
A24	English	Bremen system with ...g6
A22	English	Carls' Bremen system
A22	English	Bellon gambit
A22	English Opening	Mikenas-Carls, Sicilian Variation
A21	English Opening	Mikenas-Carls, Sicilian Variation
A20	English, Nimzovich, Flohr Variation 	Mikenas-Carls, Sicilian Variation
A20	English, Nimzovich Variation 	Mikenas-Carls, Sicilian Variation
A20	English Opening	Mikenas-Carls, Sicilian Variation
A13	English	Wimpey system
A13	English	Kurajica defense
A14	English	Symmetrical, Keres defense
A14	English	Neo-Catalan declined
A13	English	Neo-Catalan accepted
A13	English	Neo-Catalan
A13	English Opening	Agincourt Variation
A13	English Opening	Agincourt Variation
A13	English	Romanishin gambit
A13	English Opening	Caro-Kann defensive system, Bogolyubov Variation
A10	English	Anglo-Dutch defense
A10	English	Adorjan defense
A10	English Opening	Keres Variation
A15	English orang-utan	Symmetrical, Keres defense
A16	English	Anglo-Gruenfeld, Czech defense
A16	English	Anglo-Gruenfeld, Smyslov defense
A16	English	Anglo-Gruenfeld defense, Korchnoi Variation
A16	English	Anglo-Gruenfeld defense
A16	English	Anglo-Gruenfeld defense
A19	English	Mikenas-Carls, Sicilian Variation
A18	English	Mikenas-Carls, Flohr Variation
A18	English	Mikenas-Carls, Kevitz Variation
A18	English	Mikenas-Carls Variation
A17	English	Queens Indian, Romanishin Variation
A17	English	Queens Indian formation
A17	English	Nimzo-English Opening
A17	English Opening	Anglo-Gruenfeld defense, Korchnoi Variation
A16	English Opening	Symmetrical, Keres defense
A15	English Opening	Symmetrical, Keres defense
A15	English, 1...Nf6 (Anglo-Indian defense)	Symmetrical, Keres defense
A10	English Opening	Keres Variation
A00	Venezolana Opening	Romford counter-gambit
A00	Valencia Opening	Romford counter-gambit
A00	Mieses Opening	Romford counter-gambit
A00	Mieses Opening	Romford counter-gambit
A40	Polish defense	English defense
A40	Queen's pawn	English defense
A43	Old Benoni	Schmid's system
A43	Old Benoni defense	Mujannah formation
A44	Semi-Benoni (`blockade Variation ')	Schmid's system
A44	Old Benoni defense	Schmid's system
A43	Old Benoni	Franco-Benoni defense
A43	Old Benoni	Mujannah formation
A43	Woozle defense	Mujannah formation
A43	Hawk (Habichd) defense	Mujannah formation
A43	Old Benoni defense	Mujannah formation
A43	Old Benoni defense	Mujannah formation
A43	Old Benoni defense	Averbakh system, Kotov Variation
D00	Queen's pawn, Mason Variation , Steinitz counter-gambit	Closed, Chigorin, 12...c5d4
D00	Queen's pawn, Mason Variation 	Closed, Chigorin, 12...c5d4
D00	Levitsky attack (Queen's Bishop attack)	Closed, Chigorin, 12...c5d4
D06	QGD	Grau (Sahovic) defense
D06	QGD	Symmetrical (Austrian) defense
D10	QGD Slav defense	Exchange Variation
D10	QGD Slav defense, Alekhine Variation 	Albin counter-gambit, 5.g3
D10	QGD Slav	Winawer counter-gambit
D14	QGD Slav	Exchange, Trifunovic Variation
D14	QGD Slav	Exchange Variation , 6.Bf4 Bf5
D13	QGD Slav	Exchange Variation
D12	QGD Slav	Amsterdam Variation
D12	QGD Slav	Exchange Variation
D12	QGD Slav	Landau Variation
D12	QGD Slav	4.e3 Bf5
D11	QGD Slav	4.e3
D11	QGD Slav	Breyer Variation
D19	QGD Slav	Dutch, Saemisch Variation
D19	QGD Slav	Dutch Variation , Main line
D19	QGD Slav	Dutch Variation
D18	QGD Slav	Dutch, Lasker Variation
D18	QGD Slav	Dutch Variation
D17	QGD Slav	Wiesbaden Variation
D17	QGD Slav	Carlsbad Variation
D17	QGD Slav	Krause attack
D17	QGD Slav	Czech defense
D16	QGD Slav	Steiner Variation
D16	QGD Slav	Soultanbeieff Variation
D16	QGD Slav	Smyslov Variation
D16	QGD Slav accepted	Alapin Variation
D15	QGD Slav	5.e3 (Alekhine Variation )
D15	QGD Slav	Tolush-Geller gambit
D15	QGD Slav	Slav gambit
D15	QGD Slav accepted	Schlechter Variation
D15	QGD Slav	Schlechter Variation
D15	QGD Slav	Suechting Variation
D15	QGD Slav	4.Nc3
D11	QGD Slav	3.Nf3
D10	QGD Slav defense	Albin counter-gambit, 5.g3
D20	Queen's gambit accepted	Linares Variation
D20	Queen's gambit accepted	Schwartz defense
D20	Queen's gambit accepted	3.e4
D22	Queen's gambit accepted	Haberditz Variation
D22	Queen's gambit accepted	Alekhine defense, Alatortsev Variation
D21	Queen's gambit accepted	Alekhine defense, Borisenko-Furman Variation
D22	Queen's gambit accepted	Alekhine defense
D21	Queen's gambit accepted	Ericson Variation
D25	Queen's gambit accepted, Flohr Variation 	Mannheim Variation
D25	Queen's gambit accepted, Janowsky-Larsen Variation 	Mannheim Variation
D27	Queen's gambit accepted	Classical, Rubinstein Variation
D27	Queen's gambit accepted	Classical, Geller Variation
D29	Queen's gambit accepted	Classical, Smyslov Variation
D29	Queen's gambit accepted	Classical, 8...Bb7
D28	Queen's gambit accepted	Classical, Flohr Variation
D28	Queen's gambit accepted	Classical, 7...b5
D28	Queen's gambit accepted	Classical, 7.Qe2
D27	Queen's gambit accepted	Classical, 6...a6
D26	Queen's gambit accepted	Classical, Steinitz Variation
D26	Queen's gambit accepted	Classical Variation , 6.O-O
D26	Queen's gambit accepted	Classical, Furman Variation
D26	Queen's gambit accepted	Classical Variation
D26	Queen's gambit accepted	4...e6
D25	Queen's gambit accepted, Smyslov Variation 	Mannheim Variation
D25	Queen's gambit accepted, 4.e3	Mannheim Variation
D24	Queen's gambit accepted, Bogolyubov Variation 	Mannheim Variation
D24	Queen's gambit accepted, 4.Nc3	Mannheim Variation
D23	Queen's gambit accepted	Mannheim Variation
D23	Queen's gambit accepted	Haberditz Variation
D21	Queen's gambit accepted	3.Nf3
D20	Queen's gambit accepted	Dutch, Saemisch Variation
D08	QGD	Albin counter-gambit, Lasker trap
D09	QGD	Albin counter-gambit, 5.g3
D08	QGD	Albin counter-gambit, Krenosz Variation
D08	QGD	Albin counter-gambit, Janowski Variation
D08	QGD	Albin counter-gambit, Balogh Variation
D08	QGD	Albin counter-gambit, Alapin Variation
D08	QGD	Albin counter-gambit
D08	QGD	Albin counter-gambit
D31	QGD	Janowski Variation
D31	QGD	Alapin Variation
D31	QGD	Charousek (Petrosian) Variation
D32	QGD	Tarrasch, von Hennig-Schara gambit
D32	QGD	Tarrasch defense, Tarrasch gambit
D32	QGD	Tarrasch defense, Marshall gambit
D33	QGD	Tarrasch, Schlechter-Rubinstein system, Rey Ardid Variation
D33	QGD	Tarrasch, Folkestone (Swedish) Variation
D34	QGD	Tarrasch, Bogolyubov Variation
D34	QGD	Tarrasch, Stoltz Variation
D34	QGD	Tarrasch, Prague Variation , 9.Bg5
D34	QGD	Tarrasch, Reti Variation
D34	QGD	Tarrasch, Prague Variation , Normal position
D34	QGD	Tarrasch, Prague Variation , 7...Be7
D33	QGD	Tarrasch, Wagner Variation
D33	QGD	Tarrasch, Prague Variation
D33	QGD	Tarrasch, Schlechter-Rubinstein system
D32	QGD	Tarrasch defense
D32	QGD	Tarrasch defense, 4.cd ed
D32	QGD	Tarrasch defense
D31	QGD	Semi-Slav, Marshall gambit
D31	QGD	Semi-Slav, Abrahams Variation
D31	QGD	Semi-Slav, Junge Variation
D31	QGD	Semi-Slav, Koomen Variation
D31	QGD	Semi-Slav, Noteboom Variation
D31	QGD	Semi-Slav
D35	QGD	Harrwitz attack
D53	QGD	Lasker Variation
D55	QGD	Pillsbury attack
D59	QGD	Tartakower Variation
D59	QGD	Tartakower (Makagonov-Bondarevsky) system, 8.cd Nxd5
D58	QGD	Tartakower (Makagonov-Bondarevsky) system
D57	QGD	Lasker defense, Main line
D57	QGD	Lasker defense, Bernstein Variation
D56	QGD	Lasker defense, Russian Variation
D56	QGD	Lasker defense, Teichmann Variation
D56	QGD	Lasker defense
D55	QGD	Neo-Orthodox Variation , 7.Bh4
D55	QGD	Petrosian Variation
D55	QGD	Neo-Orthodox Variation , 7.Bxf6
D55	QGD	Neo-Orthodox Variation
D60	QGD	Orthodox defense, Botvinnik Variation
D60	QGD	Orthodox defense, Rauzer Variation
D62	QGD	Orthodox defense, 7.Qc2 c5, 8.cd (Rubinstein)
D61	QGD	Orthodox defense, Rubinstein Variation
D63	QGD	Orthodox defense, Swiss, Karlsbad Variation
D63	QGD	Orthodox defense, Swiss (Henneberger) Variation
D63	QGD	Orthodox defense, Capablanca Variation
D63	QGD	Orthodox defense, Pillsbury attack
D66	QGD	Orthodox defense, Bd3 line, Fianchetto Variation
D67	QGD	Orthodox defense, Bd3 line, Capablanca freeing manoevre
D67	QGD	Orthodox defense, Bd3 line, Janowski Variation
D67	QGD	Orthodox defense, Bd3 line
D67	QGD	Orthodox defense, Bd3 line, Alekhine Variation
D67	QGD	Orthodox defense, Bd3 line, 11.O-O
D68	QGD	Orthodox defense, Classical Variation
D68	QGD	Orthodox defense, Classical, 13.d1b1 (Maroczy)
D68	QGD	Orthodox defense, Classical, 13.d1c2 (Vidmar)
D69	QGD	Orthodox defense, Classical, 13.de
D66	QGD	Orthodox defense, Bd3 line
D64	QGD	Orthodox defense, Rubinstein attack, Gruenfeld Variation
D65	QGD	Orthodox defense, Rubinstein attack, Main line
D64	QGD	Orthodox defense, Rubinstein attack, Karlsbad Variation
D64	QGD	Orthodox defense, Rubinstein attack, Wolf Variation
D64	QGD	Orthodox defense, Rubinstein attack (with Rc1)
D63	QGD	Orthodox defense
D63	QGD	Orthodox defense, 7.Rc1
D60	QGD	Orthodox defense
D55	QGD	6.Nf3
D54	QGD	Anti-neo-Orthodox Variation
D53	QGD	4.Bg5 Be7, 5.e3 O-O
D53	QGD	4.Bg5 Be7
D50	QGD	Canal (Venice) Variation
D50	QGD	Semi-Tarrasch
D50	QGD	Semi-Tarrasch, Krause Variation
D50	QGD	Semi-Tarrasch, Primitive Pillsbury Variation
D50	QGD	Been-Koomen Variation
D51	QGD	Manhattan Variation
D51	QGD	Capablanca anti-Cambridge Springs Variation
D52	QGD	Cambridge Springs defense, Capablanca Variation
D52	QGD	Cambridge Springs defense, Yugoslav Variation
D52	QGD	Cambridge Springs defense, 7.cd
D52	QGD	Cambridge Springs defense, Argentine Variation
D52	QGD	Cambridge Springs defense, Bogoljubow Variation
D52	QGD	Cambridge Springs defense, Rubinstein Variation
D52	QGD	Cambridge Springs defense
D52	QGD	Capablanca anti-Cambridge Springs Variation
D51	QGD	5...c6
D51	QGD	Alekhine Variation
D51	QGD	Alekhine Variation
D51	QGD	Rochlin Variation
D51	QGD	4.Bg5 Nbd7
D50	QGD	4.Bg5
D35	QGD	Exchange, chameleon Variation
D36	QGD	Exchange, positional line, 6.Qc2
D35	QGD	Exchange, positional line, 5...c6
D35	QGD	Exchange, positional line
D35	QGD	Exchange, Saemisch Variation
D35	QGD	Exchange Variation
D39	QGD	Ragozin, Vienna Variation
D38	QGD	Ragozin Variation
D37	QGD	Classical Variation (5.Bf4)
D40	QGD	Semi-Tarrasch defense, Pillsbury Variation
D42	QGD	Semi-Tarrasch, 7.Bd3
D41	QGD	Semi-Tarrasch with e3
D41	QGD	Semi-Tarrasch, Kmoch Variation
D41	QGD	Semi-Tarrasch, San Sebastian Variation
D41	QGD	Semi-Tarrasch, 5.cd
D40	QGD	Semi-Tarrasch, Levenfish Variation
D40	QGD	Semi-Tarrasch, Symmetrical Variation
D40	QGD	Semi-Tarrasch defense
D44	QGD Semi-Slav	Ekstrom Variation
D44	QGD Semi-Slav	Anti-Meran, Lilienthal Variation
D44	QGD Semi-Slav	Anti-Meran, Szabo Variation
D44	QGD Semi-Slav	Anti-Meran, Alatortsev system
D44	QGD Semi-Slav	Anti-Meran gambit
D44	QGD Semi-Slav	Botvinnik system (anti-Meran)
D44	QGD Semi-Slav	5.Bg5 dc
D43	QGD Semi-Slav	Hastings Variation
D45	QGD Semi-Slav	Accelerated Meran (Alekhine Variation )
D46	QGD Semi-Slav	Romih Variation
D46	QGD Semi-Slav	Chigorin defense
D46	QGD Semi-Slav	Bogolyubov Variation
D48	QGD Semi-Slav	Meran, Pirc Variation
D48	QGD Semi-Slav	Meran
D48	QGD Semi-Slav	Meran, ReynOlds' Variation
D48	QGD Semi-Slav	Meran, Old Main line
D49	QGD Semi-Slav	Meran, Blumenfeld Variation
D49	QGD Semi-Slav	Meran, Rabinovich Variation
D49	QGD Semi-Slav	Meran, Sozin Variation
D49	QGD Semi-Slav	Meran, Stahlberg Variation
D49	QGD Semi-Slav	Meran, Sozin Variation
D49	QGD Semi-Slav	Meran, Rellstab attack
D48	QGD Semi-Slav	Meran, 8...a6
D47	QGD Semi-Slav	neo-Meran (Lundin Variation )
D47	QGD Semi-Slav	Meran, Wade Variation
D47	QGD Semi-Slav	Meran Variation
D47	QGD Semi-Slav	7.Bc4
D46	QGD Semi-Slav	6.Bd3
D45	QGD Semi-Slav	Rubinstein (anti-Meran) system
D45	QGD Semi-Slav	Stoltz Variation
D45	QGD Semi-Slav	5...Nd7
D45	QGD Semi-Slav	Stonewall defense
D45	QGD Semi-Slav	5.e3
D43	QGD Semi-Slav	Semi-Tarrasch, 7.Bd3
D37	QGD	4.Nf3
D35	QGD	3...Nf6
D31	QGD	3.Nc3
D30	QGD	Vienna Variation
D30	QGD	Hastings Variation
D30	QGD	Capablanca-Duras Variation
D30	QGD	Capablanca Variation
D30	QGD	Spielmann Variation
D30	QGD	Spielmann Variation
D30	QGD Slav	Semmering Variation
D30	QGD Slav	Stonewall Variation
D30	QGD	Stonewall Variation
D30	QGD Slav	Classical, Smyslov Variation
D30	Queen's gambit declined	Classical, Smyslov Variation
D07	QGD	Chigorin defense, Janowski Variation
D07	QGD	Chigorin defense
D06	QGD	Marshall defense
D06	Queen's Gambit	Lemberg counter-gambit
D00	Queen's pawn	Stonewall attack
D00	Blackmar gambit	Closed, Chigorin, 12...c5d4
D00	Queen's pawn	Anti-Veresov
D01	Richter-Veresov attack, Veresov Variation 	Lemberg counter-gambit
D01	Richter-Veresov attack, Richter Variation 	Lemberg counter-gambit
D01	Richter-Veresov attack	Lemberg counter-gambit
D00	Blackmar-Diemer	Euwe defense
D00	Blackmar-Diemer	Lemberg counter-gambit
D00	Blackmar-Diemer gambit	Anti-Veresov
D00	Queen's pawn	Chigorin Variation
D02	Queen's pawn game, Krause Variation 	Lemberg counter-gambit
D02	Queen's pawn game, Chigorin Variation 	Lemberg counter-gambit
D02	Queen's Bishop game	Lemberg counter-gambit
D03	Torre attack (Tartakower Variation )	Lemberg counter-gambit
D05	Queen's pawn game, Rubinstein (Colle-Zukertort) Variation 	Lemberg counter-gambit
D05	Colle system	Lemberg counter-gambit
D05	Queen's pawn game	Lemberg counter-gambit
D05	Queen's pawn game, Zukertort Variation 	Lemberg counter-gambit
D05	Queen's pawn game	Lemberg counter-gambit
D04	Queen's pawn game	Lemberg counter-gambit
D02	Queen's pawn game	Lemberg counter-gambit
D02	Queen's pawn game	Lemberg counter-gambit
D00	Queen's pawn game	Closed, Chigorin, 12...c5d4
A42	Pterodactyl defense	Averbakh system
A42	Modern defense	Averbakh system, Randspringer Variation
A42	Modern defense	Averbakh system, Kotov Variation
A42	Modern defense	Averbakh system
A41	Modern defense	Tartakower (Wade) Variation
A41	Old Indian defense	Tartakower (Wade) Variation
A41	Old Indian	Tartakower (Wade) Variation
A41	Queen's Pawn	Franco-Indian (Keres) defense
A40	Queen's pawn	Englund gambit
A40	Queen's pawn	Charlick (Englund) gambit
A40	Queen's pawn	Keres defense
A40	Queen's pawn	Franco-Indian (Keres) defense
A40	Queen's pawn	English defense
A80	Dutch, 2.Bg5 Variation 	Classical, 11.f3
A84	Dutch	Staunton gambit deferred
A84	Dutch defense, Rubinstein Variation 	Bladel Variation
A84	Dutch defense	Bladel Variation
A84	Dutch defense	Bladel Variation
A86	Dutch	Hort-Antoshin system
A90	Dutch defense	Dutch-Indian (Nimzo-Dutch) Variation
A90	Dutch-Indian, Alekhine Variation 	Dutch-Indian (Nimzo-Dutch) Variation
A94	Dutch	Stonewall with Ba3
A93	Dutch	Stonewall, Botwinnik Variation
A95	Dutch	Stonewall: Chekhover Variation
A95	Dutch	Stonewall with Nc3
A92	Dutch	Stonewall with Nc3
A92	Dutch	Stonewall Variation
A99	Dutch	Ilyin-Genevsky Variation with b3
A98	Dutch	Ilyin-Genevsky Variation with Qc2
A97	Dutch	Ilyin-Genevsky, Winter Variation
A97	Dutch	Ilyin-Genevsky Variation
A96	Dutch	Classical Variation
A92	Dutch defense, Alekhine Variation 	Dutch-Indian (Nimzo-Dutch) Variation
A92	Dutch defense	Dutch-Indian (Nimzo-Dutch) Variation
A91	Dutch defense	Dutch-Indian (Nimzo-Dutch) Variation
A90	Dutch defense	Leningrad, Main Variation with Nc6
A88	Dutch	Leningrad, Main Variation with c6
A89	Dutch	Leningrad, Main Variation with Nc6
A87	Dutch	Leningrad, Main Variation
A86	Dutch	Leningrad Variation
A86	Dutch with c4 & g3	Staunton gambit deferred
A85	Dutch with c4 & Nc3	Staunton gambit deferred
A84	Dutch defense	Staunton gambit deferred
A84	Dutch defense	Staunton gambit, Nimzovich Variation
A82	Dutch	Balogh defense
A83	Dutch	Staunton gambit, Nimzovich Variation
A83	Dutch	Staunton gambit, Chigorin Variation
A83	Dutch	Staunton gambit, Lasker Variation
A83	Dutch	Staunton gambit, Alekhine Variation
A83	Dutch	Staunton gambit, Staunton's line
A82	Dutch	Staunton gambit, Tartakower Variation
A82	Dutch	Staunton gambit
A82	Dutch	Staunton gambit
A81	Dutch	Leningrad, Basman system
A81	Dutch	Leningrad, Karlsbad Variation
A81	Dutch defense, Blackburne Variation 	Classical, 11.f3
A81	Dutch defense	Classical, 11.f3
A81	Dutch defense	Classical, 11.f3
A80	Dutch, Krejcik gambit	Classical, 11.f3
A80	Dutch, Korchnoi attack	Classical, 11.f3
A80	Dutch, Spielmann gambit	Classical, 11.f3
A80	Dutch, Von Pretzel gambit	Classical, 11.f3
A80	Dutch, Manhattan (Alapin, Ulvestad) Variation 	Classical, 11.f3
A80	Dutch	Classical, 11.f3
A40	Beefeater defense	Franco-Indian (Keres) defense
A40	Modern defense	Franco-Indian (Keres) defense
A40	Queen's pawn	Lundin (Kevitz-Mikenas) defense
A45	Trompovsky attack (Ruth, Opovcensky Opening)	Bronstein gambit
A50	Queen's Indian Accelerated	Fianchetto without c4
A59	Benko gambit	Main line
A59	Benko gambit	Ne2 Variation
A59	Benko gambit	Ne2 Variation
A59	Benko gambit	7.e4
A58	Benko gambit	Fianchetto Variation
A58	Benko gambit	Nd2 Variation
A58	Benko gambit accepted	Nescafe Frappe attack
A57	Benko gambit	Nescafe Frappe attack
A57	Benko gambit	Zaitsev system
A57	Benko gambit half accepted	King's Indian system
A57	Benko gambit	King's Indian system
A56	Benoni defense, Hromodka system	Main line
A56	Czech Benoni	King's Indian system
A56	Czech Benoni defense	Main line
A67	Benoni	Taimanov Variation
A66	Benoni	Mikenas Variation
A69	Benoni	Four pawns attack, Main line
A68	Benoni	Four pawns attack
A66	Benoni	pawn storm Variation
A74	Benoni	Classical, 9...a6, 10.a4
A75	Benoni	Classical with ...a6 and 10...Bg4
A76	Benoni	Classical, 9...Re8
A77	Benoni	Classical, 9...Re8, 10.Nd2
A78	Benoni	Classical with ...Re8 and ...Na6
A79	Benoni	Classical, 11.f3
A73	Benoni	Classical, 9.O-O
A72	Benoni	Classical without 9.O-O
A70	Benoni	Classical without 9.O-O
A71	Benoni	Classical, 8.Bg5
A70	Benoni	Classical with e4 and Nf3
A65	Benoni	6.e4
A61	Benoni	Uhlmann Variation
A63	Benoni	Fianchetto, 9...Nbd7
A64	Benoni	Fianchetto, 11...Re8
A62	Benoni	Fianchetto Variation
A61	Benoni	Fianchetto Variation
A61	Benoni	Nimzovich (knight's tour) Variation
A61	Benoni defense	Main line
A60	Benoni defense	Main line
A56	Vulture defense	Main line
A56	Benoni defense	Main line
A53	Old Indian	Janowski Variation
A54	Old Indian	Dus-Khotimirsky Variation
A55	Old Indian	Main line
A54	Old Indian	Ukrainian Variation , 4.Nf3
A54	Old Indian	Ukrainian Variation
A53	Old Indian defense	Alekhine Variation , Balogh gambit
A51	Budapest	Fajarowicz, Steiner Variation
A51	Budapest	Fajarowicz Variation
A52	Budapest	Rubinstein Variation
A52	Budapest	Alekhine Variation , Balogh gambit
A52	Budapest	Alekhine, Abonyi Variation
A52	Budapest	Alekhine Variation
A52	Budapest	Adler Variation
A52	Budapest defense	Fajarowicz, Steiner Variation
A51	Budapest defense declined	Fianchetto without c4
E00	Neo-Indian (Seirawan) attack	Smyslov, Yugoslav Variation
E07	Catalan	Closed, Botvinnik Variation
E08	Catalan	Closed, Spassky gambit
E08	Catalan	Closed, Qc2 & b3
E09	Catalan	Closed, Sokolsky Variation
E09	Catalan	Closed, Main line
E08	Catalan	Closed, Zagoryansky Variation
E08	Catalan	Closed, 7.Qc2
E07	Catalan	Closed, 6...Nbd7
E06	Catalan	Closed, 5.Nf3
E05	Catalan	Open, Classical line
E04	Catalan	Open, 5.Nf3
E02	Catalan	Open, 5.Qa4
E03	Catalan	Open, Alekhine Variation
E03	Catalan	Open, 5.Qa4 Nbd7, 6.Qxc4
E01	Catalan	Closed
E00	Catalan Opening	Smyslov, Yugoslav Variation
E26	Nimzo-Indian	Saemisch, O'Kelly Variation
E26	Nimzo-Indian	Saemisch Variation
E25	Nimzo-Indian	Saemisch, Romanovsky Variation
E25	Nimzo-Indian	Saemisch, Keres Variation
E25	Nimzo-Indian	Saemisch Variation
E24	Nimzo-Indian	Saemisch, Botvinnik Variation
E29	Nimzo-Indian	Saemisch, Capablanca Variation
E29	Nimzo-Indian	Saemisch, Main line
E28	Nimzo-Indian	Saemisch Variation
E27	Nimzo-Indian	Saemisch Variation
E24	Nimzo-Indian	Saemisch Variation
E30	Nimzo-Indian	Leningrad, ...b5 gambit
E31	Nimzo-Indian	Leningrad, Main line
E30	Nimzo-Indian	Leningrad Variation
E45	Nimzo-Indian	4.e3, Bronstein (Byrne) Variation
E44	Nimzo-Indian	Fischer Variation , 5.Ne2
E43	Nimzo-Indian	Fischer Variation
E41	Nimzo-Indian	e3, Huebner Variation
E42	Nimzo-Indian	4.e3 c5, 5.Ne2 (Rubinstein)
E41	Nimzo-Indian	4.e3 c5
E40	Nimzo-Indian	4.e3, Taimanov Variation
E49	Nimzo-Indian	4.e3, Botvinnik system
E48	Nimzo-Indian	4.e3 O-O, 5.Bd3 d5
E47	Nimzo-Indian	4.e3 O-O, 5.Bd3
E46	Nimzo-Indian	Simagin Variation
E46	Nimzo-Indian	Reshevsky Variation
E52	Nimzo-Indian	4.e3, Main line with ...b6
E53	Nimzo-Indian	4.e3, Keres Variation
E55	Nimzo-Indian	4.e3, Gligoric system, Bronstein Variation
E54	Nimzo-Indian	4.e3, Gligoric system, Smyslov Variation
E54	Nimzo-Indian	4.e3, Gligoric system with 7...dc
E53	Nimzo-Indian	4.e3, Gligoric system with 7...Nbd7
E59	Nimzo-Indian	4.e3, Main line
E58	Nimzo-Indian	4.e3, Main line with 8...Bxc3
E57	Nimzo-Indian	4.e3, Main line with 8...dc and 9...cd
E56	Nimzo-Indian	4.e3, Main line with 7...Nc6
E53	Nimzo-Indian	4.e3, Main line with ...c5
E51	Nimzo-Indian	4.e3, Ragozin Variation
E51	Nimzo-Indian	4.e3 e8g8, 5.Nf3 d7d5
E50	Nimzo-Indian	4.e3 e8g8, 5.Nf3, without ...d5
E46	Nimzo-Indian	4.e3 O-O
E40	Nimzo-Indian	4.e3
E20	Nimzo-Indian	Kmoch Variation
E20	Nimzo-Indian	Romanishin-Kasparov (Steiner) system
E21	Nimzo-Indian	Three knights, Euwe Variation
E21	Nimzo-Indian	Three knights, Korchnoi Variation
E21	Nimzo-Indian	Three knights Variation
E23	Nimzo-Indian	Spielmann, Staahlberg Variation
E23	Nimzo-Indian	Spielmann, San Remo Variation
E23	Nimzo-Indian	Spielmann, Karlsbad Variation
E23	Nimzo-Indian	Spielmann, 4...c5, 5.dc Nc6
E22	Nimzo-Indian	Spielmann Variation
E39	Nimzo-Indian	Classical, Pirc Variation
E38	Nimzo-Indian	Classical, 4...c5
E36	Nimzo-Indian	Classical, Botvinnik Variation
E37	Nimzo-Indian	Classical, San Remo Variation
E37	Nimzo-Indian	Classical, Noa Variation , Main line, 7.Qc2
E36	Nimzo-Indian	Classical, Noa Variation , Main line
E36	Nimzo-Indian	Classical, Noa Variation , 5.a3
E35	Nimzo-Indian	Classical, Noa Variation , 5.cd ed
E34	Nimzo-Indian	Classical, Noa Variation
E33	Nimzo-Indian	Classical, Milner-Barry (Zurich) Variation
E33	Nimzo-Indian	Classical, 4...Nc6
E32	Nimzo-Indian	Classical, Adorjan gambit
E32	Nimzo-Indian	Classical Variation
E20	Nimzo-Indian	Mikenas attack
E20	Nimzo-Indian defense	Old Main line, 9.Qxc3
E10	Dzindzikhashvili defense	Closed, Sokolsky Variation
E12	Queen's Indian	Petrosian system
E12	Queen's Indian	Miles Variation
E14	Queen's Indian	Averbakh Variation
E14	Queen's Indian	4.e3
E15	Queen's Indian	Nimzovich Variation (exaggerated Fianchetto)
E16	Queen's Indian	Capablanca Variation
E16	Queen's Indian	Yates Variation
E16	Queen's Indian	Riumin Variation
E17	Queen's Indian	Opovcensky Variation
E17	Queen's Indian	Anti-Queen's Indian system
E17	Queen's Indian	Euwe Variation
E19	Queen's Indian	Old Main line, 9.Qxc3
E18	Queen's Indian	Old Main line, 7.Nc3
E17	Queen's Indian	Old Main line, 6.O-O
E17	Queen's Indian	5.Bg2 Be7
E15	Queen's Indian	Buerger Variation
E15	Queen's Indian	Rubinstein Variation
E15	Queen's Indian	4.g3 Bb7
E15	Queen's Indian	4.g3
E13	Queen's Indian	4.Nc3, Main line
E12	Queen's Indian	4.Nc3, Botvinnik Variation
E12	Queen's Indian	4.Nc3
E12	Queen's Indian defense	Closed, Sokolsky Variation
E11	Bogo-Indian defense	Closed, Sokolsky Variation
E11	Bogo-Indian defense, Monticelli trap	Closed, Sokolsky Variation
E11	Bogo-Indian defense, Nimzovich Variation 	Closed, Sokolsky Variation
E11	Bogo-Indian defense, Gruenfeld Variation 	Closed, Sokolsky Variation
E10	Blumenfeld counter-gambit, Spielmann Variation 	Closed, Sokolsky Variation
E10	Blumenfeld counter-gambit, Dus-Chotimursky Variation 	Closed, Sokolsky Variation
E10	Blumenfeld counter-gambit accepted	Closed, Sokolsky Variation
E10	Blumenfeld counter-gambit	Closed, Sokolsky Variation
E10	Doery defense	Closed, Sokolsky Variation
E10	Queen's pawn game	Closed, Sokolsky Variation
E00	Queen's pawn game	Smyslov, Yugoslav Variation
E60	King's Indian	Danube gambit
E60	King's Indian	Anti-Gruenfeld
D70	Neo-Gruenfeld defense	Orthodox defense, Classical, 13.de
E60	King's Indian	3.g3, counterthrust Variation
D72	Neo-Gruenfeld, 5.cd, Main line	Orthodox defense, Classical, 13.de
D71	Neo-Gruenfeld, 5.cd	Orthodox defense, Classical, 13.de
D75	Neo-Gruenfeld, 6.cd Nxd5, 7.O-O c5, 8.dc	Orthodox defense, Classical, 13.de
D75	Neo-Gruenfeld, 6.cd Nxd5, 7.O-O c5, 8.Nc3	Orthodox defense, Classical, 13.de
D76	Neo-Gruenfeld, 6.cd Nxd5, 7.O-O Nb6	Orthodox defense, Classical, 13.de
D74	Neo-Gruenfeld, 6.cd Nxd5, 7.O-O	Orthodox defense, Classical, 13.de
D79	Neo-Gruenfeld, 6.O-O, Main line	Orthodox defense, Classical, 13.de
D78	Neo-Gruenfeld, 6.O-O c6	Orthodox defense, Classical, 13.de
D77	Neo-Gruenfeld, 6.O-O	Orthodox defense, Classical, 13.de
D73	Neo-Gruenfeld, 5.Nf3	Orthodox defense, Classical, 13.de
D70	Neo-Gruenfeld (Kemeri) defense	Orthodox defense, Classical, 13.de
E60	King's Indian	3.g3
E73	King's Indian	Semi-Averbakh system
E75	King's Indian	Averbakh, Main line
E74	King's Indian	Averbakh, 6...c5
E73	King's Indian	Averbakh system
E73	King's Indian	5.Be2
E70	King's Indian	Accelerated Averbakh system
E82	King's Indian	Saemisch, double Fianchetto Variation
E81	King's Indian	Saemisch, Byrne Variation
E89	King's Indian	Saemisch, Orthodox Main line
E88	King's Indian	Saemisch, Orthodox, 7.d5 c6
E87	King's Indian	Saemisch, Orthodox, Bronstein Variation
E87	King's Indian	Saemisch, Orthodox, 7.d5
E86	King's Indian	Saemisch, Orthodox, 7.Nge2 c6
E85	King's Indian	Saemisch, Orthodox Variation
E84	King's Indian	Saemisch, Panno Main line
E83	King's Indian	Saemisch, Panno formation
E83	King's Indian	Saemisch, Ruban Variation
E83	King's Indian	Saemisch, 6...Nc6
E81	King's Indian	Saemisch, 5...O-O
E80	King's Indian	Saemisch Variation
E77	King's Indian	Six pawns attack
E77	King's Indian	Four pawns attack, Florentine gambit
E77	King's Indian	Four pawns attack
E79	King's Indian	Four pawns attack, Main line
E78	King's Indian	Four pawns attack, with Be2 and Nf3
E77	King's Indian	Four pawns attack, 6.Be2
E76	King's Indian	Four pawns attack, dynamic line
E76	King's Indian	Four pawns attack
E72	King's Indian	Pomar system
E72	King's Indian with e4 & g3	Makagonov system (5.h3)
E71	King's Indian	Makagonov system (5.h3)
E92	King's Indian	Gligoric-Taimanov system
E92	King's Indian	Petrosian system, Stein Variation
E93	King's Indian	Petrosian system, Keres Variation
E93	King's Indian	Petrosian system, Main line
E92	King's Indian	Petrosian system
E92	King's Indian	Andersson Variation
E94	King's Indian	Orthodox, Donner Variation
E96	King's Indian	Orthodox, 7...Nbd7, Main line
E95	King's Indian	Orthodox, 7...Nbd7, 8.Re1
E94	King's Indian	Orthodox, 7...Nbd7
E97	King's Indian	Orthodox, Aronin-Taimanov, bayonet attack
E99	King's Indian	Orthodox, Aronin-Taimanov, Main line
E98	King's Indian	Orthodox, Aronin-Taimanov, 9.Ne1
E97	King's Indian	Orthodox, Aronin-Taimanov Variation (Yugoslav attack / Mar del Plata Variation )
E94	King's Indian	Orthodox Variation
E92	King's Indian	Classical Variation
E91	King's Indian	Kazakh Variation
E91	King's Indian	6.Be2
E90	King's Indian	Larsen Variation
E90	King's Indian	Zinnowitz Variation
E90	King's Indian	5.Nf3
E70	King's Indian	Kramer system
E70	King's Indian	4.e4
E61	King's Indian	Smyslov system
E66	King's Indian	Fianchetto, Yugoslav Panno
E65	King's Indian	Fianchetto, Yugoslav, 7.O-O
E64	King's Indian	Fianchetto, Yugoslav system
E62	King's Indian	Fianchetto, Larsen system
E62	King's Indian	Fianchetto, Kavalek (Bronstein) Variation
E69	King's Indian	Fianchetto, Classical Main line
E68	King's Indian	Fianchetto, Classical Variation , 8.e4
E67	King's Indian	Fianchetto, Classical Variation
E67	King's Indian	Fianchetto with ...Nd7
E63	King's Indian	Fianchetto, Panno Variation
E62	King's Indian	Fianchetto, lesser Simagin (Spassky) Variation
E62	King's Indian	Fianchetto, Simagin Variation
E62	King's Indian	Fianchetto, Uhlmann (Szabo) Variation
E62	King's Indian	Fianchetto with ...Nc6
E62	King's Indian	Fianchetto Variation
D84	Gruenfeld	Gruenfeld gambit accepted
D83	Gruenfeld	Gruenfeld gambit, Botvinnik Variation
D83	Gruenfeld	Gruenfeld gambit, Capablanca Variation
D83	Gruenfeld	Gruenfeld gambit
D82	Gruenfeld	4.Bf4
D80	Gruenfeld	Lundin Variation
D80	Gruenfeld	Stockholm Variation
D86	Gruenfeld	Exchange, Simagin's lesser Variation
D87	Gruenfeld	Exchange, Seville Variation
D88	Gruenfeld	Spassky Variation , Main line, 10...cd, 11.cd
D89	Gruenfeld	Spassky Variation , Main line, 13.Bd3
D89	Gruenfeld	Exchange, Sokolsky Variation
D87	Gruenfeld	Exchange, Spassky Variation
D86	Gruenfeld	Exchange, Simagin's improved Variation
D86	Gruenfeld	Exchange, Larsen Variation
D86	Gruenfeld	Exchange, Classical Variation
D85	Gruenfeld	Modern Exchange Variation
D85	Gruenfeld	Exchange Variation
D80	Gruenfeld	Spike gambit
D93	Gruenfeld with Bf4    e3	5.Bf4
D92	Gruenfeld	5.Bf4
D91	Gruenfeld	5.Bg5
D94	Gruenfeld	Makogonov Variation
D94	Gruenfeld	Opovcensky Variation
D94	Gruenfeld	Flohr defense
D94	Gruenfeld	Smyslov defense
D94	Gruenfeld with e3    Bd3	Opovcensky Variation
D95	Gruenfeld	Pachman Variation
D95	Gruenfeld	Botvinnik Variation
D95	Gruenfeld with e3 & Qb3	Flohr defense
D94	Gruenfeld	5.e3
D90	Gruenfeld	Flohr Variation
D97	Gruenfeld	Russian, Alekhine (Hungarian) Variation
D97	Gruenfeld	Russian, Levenfish Variation
D98	Gruenfeld	Russian, Keres Variation
D99	Gruenfeld defense	Smyslov, Main line
D99	Gruenfeld defense	Smyslov, Yugoslav Variation
D98	Gruenfeld	Russian, Smyslov Variation
D97	Gruenfeld	Russian, Szabo (Boleslavsky) Variation
D97	Gruenfeld	Russian, Prins Variation
D97	Gruenfeld	Russian, Byrne (Simagin) Variation
D97	Gruenfeld	Russian Variation with e4
D96	Gruenfeld	Russian Variation
D90	Gruenfeld	Three knights Variation
D90	Gruenfeld	Schlechter Variation
D90	Gruenfeld	Three knights Variation
D81	Gruenfeld	Russian Variation
D80	Gruenfeld defense	Orthodox defense, Classical, 13.de
E61	King's Indian defense, 3.Nc3	3.g3, counterthrust Variation
E60	King's Indian, 3.Nf3	4.e3, Main line
E60	Queen's pawn	Mengarini attack
E60	King's Indian defense	4.e3, Main line
A50	Kevitz-Trajkovich defense	Fianchetto without c4
A50	Queen's pawn game	Fianchetto without c4
A45	Blackmar-Diemer gambit	Bronstein gambit
A45	Gedult attack	Bronstein gambit
A45	Paleface attack	Bronstein gambit
A45	Canard Opening	Bronstein gambit
A45	Queen's pawn	Bronstein gambit
A47	Queen's Indian	Marienbad system, Berg Variation
A47	Queen's Indian	Marienbad system
A47	Queen's Indian defense	Yusupov-Rubinstein system
A46	Queen's pawn	Torre attack, Wagner gambit
A46	Queen's pawn	Torre attack
A46	Queen's pawn	Yusupov-Rubinstein system
A48	King's Indian	London system
A48	King's Indian	Torre attack
A49	King's Indian	Fianchetto without c4
A48	King's Indian	East Indian defense
A46	Doery defense	Yusupov-Rubinstein system
A46	Queen's pawn game	Bronstein gambit
A45	Queen's pawn game	Schmid's system
A40	Queen's pawn	Symmetrical, Main line with d4
A00	Amsterdam attack	Romford counter-gambit
A00	Van't Kruijs Opening	Romford counter-gambit
B00	Corn stalk defense	Ilyin-Genevsky Variation with b3
B00	St. George (Baker) defense	Ilyin-Genevsky Variation with b3
B00	Guatemala defense	Ilyin-Genevsky Variation with b3
B00	Owen defense	Ilyin-Genevsky Variation with b3
B20	Sicilian	wing gambit, Carlsbad Variation
B20	Sicilian	wing gambit, Marienbad Variation
B20	Sicilian	wing gambit, Marshall Variation
B20	Sicilian	wing gambit, Santasiere Variation
B20	Sicilian	wing gambit
B22	Sicilian	2.c3, Heidenfeld Variation
B22	Sicilian	Alapin's Variation (2.c3)
B20	Sicilian	Gloria Variation
B21	Sicilian	Smith-Morra gambit, Chicago defense
B21	Sicilian	Smith-Morra gambit
B21	Sicilian	Andreaschek gambit
B21	Sicilian	Smith-Morra gambit
B21	Sicilian	Grand Prix attack
B20	Sicilian	Steinitz Variation
B23	Sicilian	Closed, Korchnoi Variation
B23	Sicilian	Grand Prix attack, Schofman Variation
B23	Sicilian	Grand Prix attack
B26	Sicilian	Closed, 6.Be3
B25	Sicilian	Closed, 6.f4 e5 (Botvinnik)
B25	Sicilian	Closed, 6.f4
B25	Sicilian	Closed, 6.Ne2 e5 (Botvinnik)
B25	Sicilian	Closed
B24	Sicilian	Closed, Smyslov Variation
B24	Sicilian	Closed
B23	Sicilian	chameleon Variation
B23	Sicilian	Closed, 2...Nc6
B23	Sicilian	Closed
B20	Sicilian	Keres Variation (2.Ne2)
B28	Sicilian	O'Kelly Variation
B27	Sicilian	Katalimov Variation
B50	Sicilian	wing gambit deferred
B51	Sicilian	Canal-Sokolsky (Nimzovich-Rossolimo, Moscow) attack
B52	Sicilian	Canal-Sokolsky attack, Sokolsky Variation
B52	Sicilian	Canal-Sokolsky attack, Bronstein gambit
B52	Sicilian	Canal-Sokolsky attack, 3...Bd7
B55	Sicilian	Prins Variation , Venice attack
B54	Sicilian	Prins (Moscow) Variation
B90	Sicilian	Najdorf, Lipnitzky attack
B92	Sicilian	Najdorf, Opovcensky Variation
B90	Sicilian	Najdorf, Byrne (English) attack
B96	Sicilian	Najdorf, Polugayevsky, Simagin Variation
B96	Sicilian	Najdorf, Polugayevsky Variation
B98	Sicilian	Najdorf, Goteborg (Argentine) Variation
B98	Sicilian	Najdorf, Browne Variation
B99	Sicilian	Najdorf, 7...Be7 Main line
B98	Sicilian	Najdorf Variation
B98	Sicilian	Najdorf, 7...Be7
B97	Sicilian	Najdorf, Poisoned pawn Variation
B97	Sicilian	Najdorf, 7...Qb6
B96	Sicilian	Najdorf, 7.f4
B95	Sicilian	Najdorf, 6...e6
B94	Sicilian	Najdorf, Ivkov Variation
B94	Sicilian	Najdorf, 6.Bg5
B93	Sicilian	Najdorf, 6.f4
B91	Sicilian	Najdorf, Zagreb (Fianchetto) Variation
B90	Sicilian	Najdorf, Adams attack
B90	Sicilian	Najdorf
B56	Sicilian	Venice attack
B80	Sicilian	Scheveningen, Vitolins Variation
B87	Sicilian	Sozin with ...a6 and ...b5
B88	Sicilian	Sozin, Fischer Variation
B89	Sicilian	Velimirovic attack
B89	Sicilian	Sozin, 7.Be3
B88	Sicilian	Sozin, Leonhardt Variation
B86	Sicilian	Sozin attack
B84	Sicilian	Scheveningen, Classical, Nd7 system
B85	Sicilian	Scheveningen, Classical Main line
B85	Sicilian	Scheveningen, Classical
B85	Sicilian	Scheveningen, Classical, Maroczy system
B85	Sicilian	Scheveningen, Classical Variation with ...Qc7 and ...Nc6
B84	Sicilian	Scheveningen (Paulsen), Classical Variation
B84	Sicilian	Scheveningen (Paulsen), Classical Variation
B83	Sicilian	Modern Scheveningen, Main line with Nb3
B83	Sicilian	Modern Scheveningen, Main line
B83	Sicilian	Modern Scheveningen
B83	Sicilian	Scheveningen, 6.Be2
B80	Sicilian	Scheveningen, English Variation
B82	Sicilian	Scheveningen, Tal Variation
B82	Sicilian	Scheveningen, 6.f4
B80	Sicilian	Scheveningen, Fianchetto Variation
B81	Sicilian	Scheveningen, Keres attack
B80	Sicilian	Scheveningen Variation
B72	Sicilian	Dragon, Classical, Nottingham Variation
B73	Sicilian	Dragon, Classical, Zollner gambit
B74	Sicilian	Dragon, Classical, 9.Nb3
B74	Sicilian	Dragon, Classical, Stockholm attack
B74	Sicilian	Dragon, Classical, Spielmann Variation
B74	Sicilian	Dragon, Classical, Bernard defense
B74	Sicilian	Dragon, Classical, Reti-Tartakower Variation
B74	Sicilian	Dragon, Classical, Alekhine Variation
B73	Sicilian	Dragon, Classical, Richter Variation
B73	Sicilian	Dragon, Classical, 8.O-O
B72	Sicilian	Dragon, Classical, Grigoriev Variation
B72	Sicilian	Dragon, Classical, Amsterdam Variation
B72	Sicilian	Dragon, Classical attack
B77	Sicilian	Dragon, Yugoslav attack, Byrne Variation
B77	Sicilian	Dragon, Yugoslav attack, 9...Bd7
B78	Sicilian	Dragon, Yugoslav attack, 10.O-O-O
B79	Sicilian	Dragon, Yugoslav attack, 12.h4
B77	Sicilian	Dragon, Yugoslav attack, 9.Bc4
B76	Sicilian	Dragon, Yugoslav attack, Rauser Variation
B76	Sicilian	Dragon, Yugoslav attack, 7...O-O
B75	Sicilian	Dragon, Yugoslav attack
B72	Sicilian	Dragon, 6.Be3
B71	Sicilian	Dragon, Levenfish; Flohr Variation
B71	Sicilian	Dragon, Levenfish Variation
B70	Sicilian	Dragon Variation
B57	Sicilian	Magnus Smith trap
B57	Sicilian	Sozin, Benko Variation
B57	Sicilian	Sozin, not Scheveningen
B61	Sicilian	Richter-Rauzer, Larsen Variation , 7.Qd2
B60	Sicilian	Richter-Rauzer, Larsen Variation
B62	Sicilian	Richter-Rauzer, Margate (Alekhine) Variation
B62	Sicilian	Richter-Rauzer, Podvebrady Variation
B62	Sicilian	Richter-Rauzer, Richter attack
B68	Sicilian	Richter-Rauzer, Rauzer attack, 7...a6 defense, 9...Be7
B69	Sicilian	Richter-Rauzer, Rauzer attack, 7...a6 defense, 11.Bxf6
B67	Sicilian	Richter-Rauzer, Rauzer attack, 7...a6 defense, 8...Bd7
B66	Sicilian	Richter-Rauzer, Rauzer attack, 7...a6
B64	Sicilian	Richter-Rauzer, Rauzer attack, 7...Be7 defense, 9.f4
B64	Sicilian	Richter-Rauzer, Rauzer attack, Geller Variation
B65	Sicilian	Richter-Rauzer, Rauzer attack, 7...Be7 defense, 9...Nxd4
B65	Sicilian	Richter-Rauzer, Rauzer attack, 7...Be7 defense, 9...Nxd4
B63	Sicilian	Richter-Rauzer, Rauzer attack, 7...Be7
B63	Sicilian	Richter-Rauzer, Rauzer attack
B62	Sicilian	Richter-Rauzer, Keres Variation
B62	Sicilian	Richter-Rauzer, 6...e6
B60	Sicilian	Richter-Rauzer, Bondarevsky Variation
B60	Sicilian	Richter-Rauzer
B56	Sicilian	Venice attack
B56	Sicilian	Prins Variation , Venice attack
B54	Sicilian	Chekhover, Zaitsev Variation
B53	Sicilian	Chekhover, Zaitsev Variation
B53	Sicilian, Chekhover Variation 	Canal-Sokolsky attack, Sokolsky Variation
B50	Sicilian	Taimanov Variation
B42	Sicilian	Kan, Polugaievsky Variation
B42	Sicilian	Kan, Swiss cheese Variation
B42	Sicilian	Kan, Gipslis Variation
B42	Sicilian	Kan, 5.Bd3
B41	Sicilian	Kan, Maroczy bind - Bronstein Variation
B41	Sicilian	Kan, Maroczy bind (Reti Variation )
B43	Sicilian	Kan, 5.Nc3
B41	Sicilian	Kan Variation
B44	Sicilian, Szen, hedgehog Variation 	Kan, 5.Nc3
B44	Sicilian, Szen Variation , Dely-Kasparov gambit	Kan, 5.Nc3
B44	Sicilian, Szen (`anti-Taimanov') Variation 	Kan, 5.Nc3
B46	Sicilian	Taimanov Variation
B45	Sicilian	Taimanov, American attack
B49	Sicilian	Taimanov Variation
B48	Sicilian	Taimanov Variation
B47	Sicilian	Taimanov (Bastrikov) Variation
B45	Sicilian	Taimanov Variation
B44	Sicilian defense	Kan, 5.Nc3
B40	Sicilian	Pin, Jaffe Variation
B40	Sicilian	Pin, Koch Variation
B40	Sicilian	Pin Variation (Sicilian counter-attack)
B40	Sicilian	Anderssen Variation
B40	Sicilian defense	Marshall Variation
B40	Sicilian	Marshall Variation
B40	Sicilian defense	Accelerated Fianchetto, Breyer Variation
B27	Sicilian	Acton extension
B27	Sicilian	Hungarian Variation
B31	Sicilian	Nimzovich-Rossolimo attack, Gurgenidze Variation
B31	Sicilian	Nimzovich-Rossolimo attack (with ...g6, without ...d6)
B30	Sicilian	Nimzovich-Rossolimo attack (without ...d6)
B32	Sicilian	Nimzovich Variation
B32	Sicilian	Labourdonnais-Loewenthal (Kalashnikov) Variation
B32	Sicilian	Labourdonnais-Loewenthal Variation
B39	Sicilian	Accelerated Fianchetto, Breyer Variation
B38	Sicilian	Accelerated Fianchetto, Maroczy bind, 6.Be3
B37	Sicilian	Accelerated Fianchetto, Simagin Variation
B37	Sicilian	Accelerated Fianchetto, Maroczy bind, 5...Bg7
B36	Sicilian	Accelerated Fianchetto, Gurgenidze Variation
B36	Sicilian	Accelerated Fianchetto, Maroczy bind
B35	Sicilian	Accelerated Fianchetto, Modern Variation with Bc4
B34	Sicilian	Accelerated Fianchetto, Modern Variation
B34	Sicilian	Accelerated Fianchetto, Exchange Variation
B59	Sicilian	Boleslavsky Variation , 7.Nb3
B58	Sicilian	Boleslavsky, Louma Variation
B58	Sicilian	Boleslavsky Variation
B58	Sicilian	Classical
B33	Sicilian	Sveshnikov Variation
B33	Sicilian	Pelikan, Chelyabinsk Variation
B33	Sicilian	Pelikan, Bird Variation
B33	Sicilian	Pelikan (Lasker/Sveshnikov) Variation
B33	Sicilian defense	Labourdonnais-Loewenthal (Kalashnikov) Variation
B32	Sicilian	Flohr Variation
B32	Sicilian defense	Nimzovich-Rossolimo attack, Gurgenidze Variation
B30	Sicilian defense	Nimzovich-Rubinstein; Rubinstein counter-gambit
B29	Sicilian	Nimzovich-Rubinstein; Rubinstein counter-gambit
B29	Sicilian	Nimzovich-Rubinstein Variation
B27	Sicilian	Stiletto (Althouse) Variation
B27	Sicilian	Quinteros Variation
B27	Sicilian defense	Closed, 6.Be3
B20	Sicilian defense	Classical, Spassky Variation
B10	Caro-Kann	Hillbilly attack
B10	Caro-Kann	Anti-anti-Caro-Kann defense
B10	Caro-Kann	Anti-Caro-Kann defense
B10	Caro-Kann	Closed (Breyer) Variation
B12	Caro-Kann	Advance, Short Variation
B12	Caro-Kann	Advance Variation
B13	Caro-Kann	Exchange, Rubinstein Variation
B13	Caro-Kann	Panov-Botvinnik, Gunderam attack
B14	Caro-Kann	Panov-Botvinnik attack, 5...e6
B14	Caro-Kann	Panov-Botvinnik attack, 5...g6
B13	Caro-Kann	Panov-Botvinnik, Herzog defense
B13	Caro-Kann	Panov-Botvinnik, normal Variation
B13	Caro-Kann	Panov-Botvinnik, Czerniak Variation
B13	Caro-Kann	Panov-Botvinnik, Reifir (Spielmann) Variation
B13	Caro-Kann	Panov-Botvinnik attack
B13	Caro-Kann	Panov-Botvinnik attack
B13	Caro-Kann	Exchange Variation
B12	Caro-Kann	Tartakower (fantasy) Variation
B15	Caro-Kann	Gurgenidze counter-attack
B15	Caro-Kann	Rasa-Studier gambit
B18	Caro-Kann	Classical, Maroczy attack
B19	Caro-Kann	Classical, Spassky Variation
B19	Caro-Kann	Classical, 7...Nd7
B18	Caro-Kann	Classical, 6.h4
B18	Caro-Kann	Classical, Flohr Variation
B18	Caro-Kann	Classical Variation
B17	Caro-Kann	Steinitz Variation
B15	Caro-Kann	Alekhine gambit
B15	Caro-Kann	Forgacs Variation
B15	Caro-Kann	Tartakower (Nimzovich) Variation
B16	Caro-Kann	Bronstein-Larsen Variation
B15	Caro-Kann defense	Rasa-Studier gambit
B15	Caro-Kann	Gurgenidze system
B15	Caro-Kann defense	Panov-Botvinnik attack, 5...g6
B12	Caro-Kann	Edinburgh Variation
B12	Caro-Kann	3.Nd2
B12	Caro-Kann defense	Two knights, 3...Bg4
B12	de Bruycker defense	Two knights, 3...Bg4
B12	Caro-Masi defense	Two knights, 3...Bg4
B12	Caro-Kann defense	Two knights, 3...Bg4
B11	Caro-Kann	Two knights, 3...Bg4
B10	Caro-Kann	Two knights Variation
B10	Caro-Kann	GOldman (Spielmann) Variation
B10	Caro-Kann defense	Closed (Breyer) Variation
B10	Caro-Kann defense	Austrian attack, Ljubojevic Variation
B01	Scandinavian gambit	Icelandic gambit
B01	Scandinavian	Icelandic gambit
B01	Scandinavian	Richter Variation
B01	Scandinavian	Kiel Variation
B01	Scandinavian	Marshall Variation
B01	Scandinavian defense	Icelandic gambit
B01	Scandinavian defense	Pytel-Wade Variation
B01	Scandinavian, Mieses-Kotrvc gambit	Anderssen counter-attack, Collijn Variation
B01	Scandinavian	Anderssen counter-attack Orthodox attack
B01	Scandinavian	Anderssen counter-attack, Collijn Variation
B01	Scandinavian	Anderssen counter-attack, Goteborg system
B01	Scandinavian	Anderssen counter-attack
B01	Scandinavian defense, Gruenfeld Variation 	Neo-Mongoloid defense
B01	Scandinavian defense	Neo-Mongoloid defense
B01	Scandinavian defense, Lasker Variation 	Neo-Mongoloid defense
B01	Scandinavian	Pytel-Wade Variation
B01	Scandinavian (center counter) defense	Neo-Mongoloid defense
B07	Pirc	Ufimtsev-Pytel Variation
B07	Pirc	Holmov system
B07	Pirc	Chinese Variation
B07	Pirc	bayonet (Mariotti) attack
B07	Pirc defense	Byrne Variation
B07	Pirc	150 attack
B07	Pirc	Byrne Variation
B09	Pirc	Austrian attack, Ljubojevic Variation
B09	Pirc	Austrian attack, Dragon formation
B09	Pirc	Austrian attack, 6.Bd3
B09	Pirc	Austrian attack, 6.Be3
B09	Pirc	Austrian attack, 6.e5
B09	Pirc	Austrian attack
B09	Pirc	Austrian attack
B07	Pirc	Sveshnikov system
B08	Pirc	Classical system, 5.Be2
B08	Pirc	Classical, h3 system
B08	Pirc	Classical (Two knights) system
B08	Pirc	Classical (Two knights) system
B07	Pirc defense	Ufimtsev-Pytel Variation
B07	Pirc defense	Pseudo-Austrian attack
C20	KP	Mengarini's Opening
C23	Bishop's Opening	Four pawns' gambit
C23	Bishop's Opening	MacDonnell double gambit
C23	Bishop's Opening	Wing gambit
C23	Bishop's Opening	Lewis counter-gambit
C23	Bishop's Opening	Pratt Variation
C23	Bishop's Opening	del Rio Variation
C23	Bishop's Opening	Philidor Variation
C23	Bishop's Opening	Lewis gambit
C23	Bishop's Opening	Lopez gambit
C23	Bishop's Opening	Classical Variation
C23	Bishop's Opening	Lisitsyn Variation
C23	Bishop's Opening	Philidor counter-attack
C23	Bishop's Opening	Calabrese counter-gambit, Jaenisch Variation
C23	Bishop's Opening	Calabrese counter-gambit
C24	Bishop's Opening	Urusov gambit, Panov Variation
C24	Bishop's Opening	Urusov gambit
C24	Bishop's Opening	Ponziani gambit
C24	Bishop's Opening	Greco gambit
C24	Bishop's Opening	Berlin defense
C23	Bishop's Opening	Hall Variation
C20	KP	Lopez Opening
C20	KP	Indian Opening
C21	Danish gambit	Soerensen defense
C21	Danish gambit	Schlechter defense
C21	Danish gambit	Collijn defense
C21	Danish gambit	Lopez Opening
C21	Halasz gambit	Lopez Opening
C21	center game, Kieseritsky Variation 	Lopez Opening
C22	center game	Hall Variation
C22	center game	Charousek Variation
C22	center game	l'Hermet Variation
C22	center game	Kupr)k Variation
C22	center game	Berger Variation
C22	center game	Paulsen attack
C22	center game	Soerensen defense
C21	center game	Soerensen defense
C21	center game	Lopez Opening
C20	KP	King's head Opening
C30	KGD	Classical, Heath Variation
C30	KGD	Classical, Marshall attack
C30	KGD	Classical, Reti Variation
C30	KGD	Classical counter-gambit
C30	KGD	Classical, 4.c3
C30	KGD	Classical, SOldatenkov Variation
C30	KGD	Classical, Hanham Variation
C30	KGD	Classical, Svenonius Variation
C30	KGD	Classical Variation
C30	KGD	Mafia defense
C31	KGD	Nimzovich counter-gambit
C31	KGD	Falkbeer, Nimzovich Variation
C32	KGD	Falkbeer, Alapin Variation
C32	KGD	Falkbeer, Tarrasch Variation
C32	KGD	Falkbeer, Main line, 7...Bf5
C32	KGD	Falkbeer, Charousek Variation
C32	KGD	Falkbeer, Charousek gambit
C32	KGD	Falkbeer, 5.de
C31	KGD	Falkbeer, Morphy gambit
C32	KGD	Falkbeer, Keres Variation
C32	KGD	Falkbeer, Reti Variation
C31	KGD	Falkbeer, 4.d3
C31	KGD	Falkbeer, Rubinstein Variation
C31	KGD	Falkbeer, 3...e4
C31	KGD	Falkbeer counter-gambit
C31	KGD	Falkbeer, Milner-Barry Variation
C31	KGD	Falkbeer, Tartakower Variation
C31	KGD	Falkbeer counter-gambit
C33	KGA	Orsini gambit
C33	KGA	Bishop's gambit, Bryan counter-gambit
C33	KGA	Bishop's gambit, Ruy Lopez defense
C33	KGA	Bishop's gambit, Anderssen Variation
C33	KGA	Bishop's gambit, Morphy Variation
C33	KGA	Bishop's gambit, Boren-Svenonius Variation
C33	KGA	Bishop's gambit, Gifford Variation
C33	KGA	Bishop's gambit, Bledow Variation
C33	KGA	Lopez-Gianutio counter-gambit, Hein Variation
C33	KGA	Bishop's gambit, Lopez-Gianutio counter-gambit
C33	KGA	Bishop's gambit, Maurian defense
C33	KGA	Bishop's gambit, Steinitz defense
C33	KGA	Bishop's gambit, Paulsen attack
C33	KGA	Bishop's gambit, Jaenisch Variation
C33	KGA	Bishop's gambit, Bogolyubov Variation
C33	KGA	Bishop's gambit, Cozio (Morphy) defense
C33	KGA	Bishop's gambit, Bryan counter-gambit
C33	KGA	Bishop's gambit, Greco Variation
C33	KGA	Bishop's gambit, Chigorin's attack
C33	KGA	Bishop's gambit, Grimm attack
C33	KGA	Bishop's gambit, McDonnell attack
C33	KGA	Bishop's gambit, Classical defense
C33	KGA	Bishop's gambit, Fraser Variation
C33	KGA	Bishop's gambit, McDonnell attack
C33	KGA	Bishop's gambit, Classical defense, Cozio attack
C33	KGA	Bishop's gambit, Classical defense
C33	KGA	Bishop's gambit, Boden defense
C33	KGA	Bishop's gambit
C33	KGA	Schurig gambit
C33	KGA	Lesser Bishop's (Petroff-Jaenisch-Tartakower) gambit
C33	KGA	Villemson (Steinitz) gambit
C33	KGA	Pawn's gambit (Stamma gambit)
C33	KGA	Tumbleweed gambit
C33	KGA	Keres (Mason-Steinitz) gambit
C35	KGA	Cunningham, Three pawns gambit
C35	KGA	Cunningham, Bertin gambit
C35	KGA	Cunningham, Euwe defense
C35	KGA	Cunningham defense
C36	KGA	Abbazia defense, Botvinnik Variation
C36	KGA	Abbazia defense, Modern Variation
C36	KGA	Abbazia defense (Classical defense, Modern defense[!])
C34	KGA	Fischer defense
C34	KGA	Gianutio counter-gambit
C38	KGA	Greco gambit
C38	KGA	Philidor gambit, Schultz Variation
C38	KGA	Philidor gambit
C38	KGA	Hanstein gambit
C38	King's knight's gambit	Muzio gambit, Brentano defense
C37	KGA	Lolli gambit (wild Muzio gambit)
C37	KGA	Lolli gambit, Young Variation
C37	KGA	Ghulam Kassim gambit
C37	KGA	MacDonnell gambit
C37	KGA	Cochrane gambit
C37	KGA	Herzfeld gambit
C37	KGA	Salvio gambit, Anderssen counter-attack
C37	KGA	Silberschmidt gambit
C37	KGA	Salvio gambit
C37	KGA	Muzio gambit, Brentano defense
C37	KGA	Muzio gambit, Holloway defense
C37	KGA	Muzio gambit, From defense
C37	KGA	double Muzio gambit
C37	KGA	Muzio gambit, Paulsen Variation
C37	KGA	Muzio gambit, Kling and Horwitz counter-attack
C37	KGA	Muzio gambit
C37	KGA	Blachly gambit
C37	KGA	King's knight's gambit
C37	KGA	Soerensen gambit
C37	KGA	Rosentreter gambit
C39	KGA	Kieseritsky, Polerio defense
C39	KGA	Kieseritsky, Paulsen defense
C39	KGA	Kieseritsky, Brentano defense, Caro Variation
C39	KGA	Kieseritsky, Brentano defense
C39	KGA	Kieseritsky, Brentano defense, Kaplanek Variation
C39	KGA	Kieseritsky, Brentano (Campbell) defense
C39	KGA	Kieseritsky, Kolisch defense
C39	KGA	Kieseritsky, long whip defense, Jaenisch Variation
C39	KGA	Kieseritsky, long whip (Stockwhip, Classical) defense
C39	KGA	Kieseritsky, Neumann defense
C39	KGA	Kieseritsky, Rice gambit
C39	KGA	Kieseritsky, Berlin defense, 6.Bc4
C39	KGA	Kieseritsky, Berlin defense, Riviere Variation
C39	KGA	Kieseritsky, Berlin defense
C39	KGA	Kieseritsky, Salvio defense, Cozio Variation
C39	KGA	Kieseritsky, Salvio (Rosenthal) defense
C39	KGA	Allgaier, Walker attack
C39	KGA	Allgaier, Urusov attack
C39	KGA	Allgaier, Cook Variation
C39	KGA	Allgaier, ThorOld Variation
C39	KGA	Allgaier, Blackburne gambit
C39	KGA	Allgaier, Horny defense
C39	KGA	Allgaier, Schlechter defense
C39	KGA	Allgaier gambit
C39	King's knight's gambit	Philidor gambit, Schultz Variation
C37	KGA	Quaade gambit
C34	KGA	Becker defense
C34	KGA	Bonsch-Osmolovsky Variation
C34	KGA	Schallop defense
C34	King's knight's gambit	Bishop's gambit, Jaenisch Variation
C33	KGA	Carrera (Basman) gambit
C33	KGA	Breyer gambit
C33	King's gambit accepted	Falkbeer, Reti Variation
C30	KGD	2...Nf6
C30	KGD	Norwalde Variation , Buecker gambit
C30	KGD	Norwalde Variation
C30	KGD	Keene's defense
C30	King's gambit	Heyde Variation
C25	Vienna	Zhuravlev countergambit
C25	Vienna	Fyfe gambit
C25	Vienna	Steinitz gambit, Fraser-Minckwitz Variation
C25	Vienna	Steinitz gambit, Zukertort defense
C25	Vienna	Steinitz gambit
C25	Vienna	Hamppe-Muzio, Dubois Variation
C25	Vienna	Hamppe-Muzio gambit
C25	Vienna	Pierce gambit, Rushmere attack
C25	Vienna	Pierce gambit
C25	Vienna	Hamppe-Allgaier gambit, Alapin Variation
C25	Vienna	Hamppe-Allgaier gambit
C25	Vienna gambit	Steinitz gambit, Fraser-Minckwitz Variation
C25	Vienna gambit	Fyfe gambit
C25	Vienna	Paulsen Variation
C25	Vienna game, Max Lange defense	Zhuravlev countergambit
C26	Vienna	Mengarini Variation
C28	Vienna game	Lichtenhein defense
C27	Boden-Kieseritsky gambit	Lichtenhein defense
C27	Boden-Kieseritsky gambit	Alekhine Variation
C27	Vienna	Alekhine Variation
C27	Vienna game	Adams' gambit
C27	Vienna	Adams' gambit
C27	Vienna	`Frankenstein-Dracula' Variation
C27	Vienna game	Paulsen-Mieses Variation
C26	Vienna game	Paulsen-Mieses Variation
C29	Vienna gambit, Steinitz Variation 	Heyde Variation
C29	Vienna gambit, Wurzburger trap	Heyde Variation
C29	Vienna gambit	Heyde Variation
C29	Vienna gambit	Breyer Variation
C29	Vienna gambit	Kaufmann Variation
C29	Vienna gambit	Heyde Variation
C29	Vienna gambit	Bardeleben Variation
C29	Vienna gambit	Paulsen attack
C29	Vienna gambit	Lichtenhein defense
C26	Vienna	Paulsen-Mieses Variation
C26	Vienna	Falkbeer Variation
C25	Vienna game	Urusov gambit, Panov Variation
C20	Alapin's Opening	Lopez Opening
C40	QP counter-gambit	Maroczy gambit
C40	QP counter-gambit (elephant gambit)	Kieseritsky, Rice gambit
C41	Philidor	Steinitz Variation
C41	Philidor	Lopez counter-gambit, Jaenisch Variation
C41	Philidor	Lopez counter-gambit
C41	Philidor	Paulsen attack
C41	Philidor	Larsen Variation
C41	Philidor	Berger Variation
C41	Philidor	Exchange Variation
C41	Philidor	Exchange Variation
C41	Philidor	Boden Variation
C41	Philidor	Exchange Variation
C41	Philidor	Philidor counter-gambit, Berger Variation
C41	Philidor	Philidor counter-gambit, del Rio attack
C41	Philidor	Philidor counter-gambit, Zukertort Variation
C41	Philidor	Philidor counter-gambit
C41	Philidor	Hanham, Delmar Variation
C41	Philidor	Hanham, Schlechter Variation
C41	Philidor	Hanham, Berger Variation
C41	Philidor	Hanham, Kmoch Variation
C41	Philidor	Hanham, Steiner Variation
C41	Philidor	Hanham, Krause Variation
C41	Philidor	Hanham Variation
C41	Philidor	Nimzovich, Klein Variation
C41	Philidor	Nimzovich, Sokolsky Variation
C41	Philidor	Nimzovich, Rellstab Variation
C41	Philidor	Nimzovich Variation
C41	Philidor	Nimzovich, Larobok Variation
C41	Philidor	Nimzovich, Sozin Variation
C41	Philidor	Improved Hanham Variation
C41	Philidor	Nimzovich, Locock Variation
C41	Philidor	Nimzovich (Jaensch) Variation
C41	Philidor's defense	Lopez counter-gambit, Jaenisch Variation
C41	Philidor's defense	corkscrew counter-gambit
C40	Latvian	Polerio Variation
C40	Latvian	corkscrew counter-gambit
C40	Latvian	Behting Variation
C40	Latvian gambit, 3.Bc4	Fraser defense
C40	Latvian	Fraser defense
C40	Latvian	Nimzovich Variation
C40	Latvian counter-gambit	Maroczy gambit
C40	Damiano's defense	Kieseritsky, Rice gambit
C70	Ruy Lopez	Graz Variation
C70	Ruy Lopez	Taimanov (chase/wing/Accelerated counterthrust) Variation
C70	Ruy Lopez	Caro Variation
C70	Ruy Lopez	Alapin's defense deferred
C70	Ruy Lopez	Classical defense deferred
C73	Ruy Lopez	Modern Steinitz defense, Alapin Variation
C73	Ruy Lopez	Modern Steinitz defense, Richter Variation
C76	Ruy Lopez	Modern Steinitz defense, Fianchetto (Bronstein) Variation
C75	Ruy Lopez	Modern Steinitz defense, Rubinstein Variation
C75	Ruy Lopez	Modern Steinitz defense
C74	Ruy Lopez	Siesta, Kopayev Variation
C74	Ruy Lopez	Modern Steinitz defense, siesta Variation
C74	Ruy Lopez	Modern Steinitz defense
C71	Ruy Lopez	Modern Steinitz defense, Duras (Keres) Variation
C71	Ruy Lopez	Noah's ark trap
C71	Ruy Lopez	Modern Steinitz defense, Three knights Variation
C72	Ruy Lopez	Modern Steinitz defense, 5.O-O
C71	Ruy Lopez	Modern Steinitz defense
C70	Ruy Lopez	Schliemann defense deferred
C70	Ruy Lopez	Fianchetto defense deferred
C70	Ruy Lopez	Bird's defense deferred
C77	Ruy Lopez	Treybal (Bayreuth) Variation (Exchange var. deferred)
C77	Ruy Lopez	Morphy defense, Duras Variation
C77	Ruy Lopez	Anderssen Variation
C77	Ruy Lopez	Four knights (Tarrasch) Variation
C78	Ruy Lopez	Archangelsk (counterthrust) Variation
C78	Ruy Lopez	Wing attack
C78	Ruy Lopez	Rabinovich Variation
C78	Ruy Lopez	...b5 & ...d6
C78	Ruy Lopez	Moeller defense
C85	Ruy Lopez	Exchange Variation doubly deferred (DERLD)
C84	Ruy Lopez	Closed, Basque gambit (North Spanish Variation )
C84	Ruy Lopez	Closed, center attack
C86	Ruy Lopez	Worrall attack, solid line
C86	Ruy Lopez	Worrall attack, sharp line
C86	Ruy Lopez	Worrall attack
C88	Ruy Lopez	Trajkovic counter-attack
C88	Ruy Lopez	Closed, Leonhardt Variation
C88	Ruy Lopez	Closed, Balla Variation
C88	Ruy Lopez	Noah's ark trap
C88	Ruy Lopez	Closed, 7...d6, 8.d4
C88	Ruy Lopez	Closed, anti-Marshall 8.a4
C89	Ruy Lopez	Marshall, Herman Steiner Variation
C89	Ruy Lopez	Marshall counter-attack, 11...c6
C89	Ruy Lopez	Marshall, Kevitz Variation
C89	Ruy Lopez	Marshall, Main line, 12.d2d4
C89	Ruy Lopez	Marshall, Main line, 14...Qh3
C89	Ruy Lopez	Marshall, Main line, Spassky Variation
C89	Ruy Lopez	Marshall counter-attack
C90	Ruy Lopez	Closed, Suetin Variation
C90	Ruy Lopez	Closed, Lutikov Variation
C90	Ruy Lopez	Closed, Pilnik Variation
C91	Ruy Lopez	Closed, Bogolyubov Variation
C91	Ruy Lopez	Closed, 9.d4
C92	Ruy Lopez	Closed, Keres (9...a5) Variation
C92	Ruy Lopez	Closed, Flohr-Zaitsev system (Lenzerheide Variation )
C92	Ruy Lopez	Closed, Kholmov Variation
C93	Ruy Lopez	Closed, Smyslov defense
C96	Ruy Lopez	Closed (8...Na5)
C96	Ruy Lopez	Closed, Rossolimo defense
C96	Ruy Lopez	Closed (10...c5)
C96	Ruy Lopez	Closed, Borisenko defense
C96	Ruy Lopez	Closed, Keres (...Nd7) defense
C97	Ruy Lopez	Closed, Chigorin defense
C97	Ruy Lopez	Closed, Chigorin, Yugoslav system
C98	Ruy Lopez	Closed, Chigorin, 12...Nc6
C98	Ruy Lopez	Closed, Chigorin, Rauzer attack
C99	Ruy Lopez	Closed, Chigorin, 12...c5d4
C94	Ruy Lopez	Closed, Breyer defense
C95	Ruy Lopez	Closed, Breyer, 10.d4
C95	Ruy Lopez	Closed, Breyer, Borisenko Variation
C95	Ruy Lopez	Closed, Breyer, Gligoric Variation
C95	Ruy Lopez	Closed, Breyer, Simagin Variation
C92	Ruy Lopez	Closed, Ragozin-Petrosian (`Keres') Variation
C92	Ruy Lopez	Closed, 9.h3
C90	Ruy Lopez	Closed (with ...d6)
C88	Ruy Lopez	Closed, 8.c3
C88	Ruy Lopez	Closed, 7...O-O
C88	Ruy Lopez	Closed
C87	Ruy Lopez	Closed, Averbach Variation
C84	Ruy Lopez	Closed defense
C79	Ruy Lopez	Steinitz defense deferred, Lipnitsky Variation
C79	Ruy Lopez	Steinitz defense deferred, Boleslavsky Variation
C79	Ruy Lopez	Steinitz defense deferred, Rubinstein Variation
C79	Ruy Lopez	Steinitz defense deferred (Russian defense)
C80	Ruy Lopez	Open, Berger Variation
C80	Ruy Lopez	Open, Schlechter defense
C80	Ruy Lopez	Open, Harksen gambit
C82	Ruy Lopez	Open, Italian Variation
C82	Ruy Lopez	Open, St. Petersburg Variation
C82	Ruy Lopez	Open, Dilworth Variation
C82	Ruy Lopez	Open, Motzko attack
C82	Ruy Lopez	Open, Motzko attack, Nenarokov Variation
C83	Ruy Lopez	Open, Classical defense
C83	Ruy Lopez	Open, Malkin Variation
C83	Ruy Lopez	Open, 9...Be7, 10.Re1
C83	Ruy Lopez	Open, Tarrasch trap
C83	Ruy Lopez	Open, Breslau Variation
C82	Ruy Lopez	Open, Berlin Variation
C82	Ruy Lopez	Open, 9.c3
C80	Ruy Lopez	Open, Bernstein Variation
C80	Ruy Lopez	Open, Bernstein Variation , Karpov gambit
C81	Ruy Lopez	Open, Howell attack, Ekstroem Variation
C81	Ruy Lopez	Open, Howell attack, Adam Variation
C81	Ruy Lopez	Open, Howell attack
C80	Ruy Lopez	Open, 8...Be6
C80	Ruy Lopez	Open, Zukertort Variation
C80	Ruy Lopez	Open, 8.de
C80	Ruy Lopez	Open, 7.Bb3
C80	Ruy Lopez	Open, Richter Variation
C80	Ruy Lopez	Open, Friess attack
C80	Ruy Lopez	Open, 6.d4 b5
C80	Ruy Lopez	Open, Riga Variation
C80	Ruy Lopez	Open, 6.d4
C80	Ruy Lopez	Open, Knorre Variation
C80	Ruy Lopez	Open, Tartakower Variation
C80	Ruy Lopez	Open (Tarrasch) defense
C78	Ruy Lopez	5.O-O
C77	Ruy Lopez	Wormald attack, Gruenfeld Variation
C77	Ruy Lopez	Wormald (Alapin) attack
C77	Ruy Lopez	Morphy defense
C70	Ruy Lopez	Cozio defense deferred
C70	Ruy Lopez	Exchange, Bronstein Variation
C68	Ruy Lopez	Exchange, Alekhine Variation
C68	Ruy Lopez	Exchange, Romanovsky Variation
C68	Ruy Lopez	Exchange, Keres Variation
C69	Ruy Lopez	Exchange Variation , Alapin gambit
C69	Ruy Lopez	Exchange, Gligoric Variation
C69	Ruy Lopez	Exchange, Bronstein Variation
C69	Ruy Lopez	Exchange Variation , 5.O-O
C68	Ruy Lopez	Exchange Variation
C64	Ruy Lopez	Classical defense, Charousek Variation
C64	Ruy Lopez	Cordel gambit
C64	Ruy Lopez	Classical defense, Benelux Variation
C64	Ruy Lopez	Classical defense, Boden Variation
C64	Ruy Lopez	Classical defense, 4.c3
C64	Ruy Lopez	Classical defense, Zaitsev Variation
C64	Ruy Lopez	Classical (Cordel) defense
C60	Ruy Lopez	Lucena defense
C62	Ruy Lopez	Old Steinitz defense, Semi-Duras Variation
C62	Ruy Lopez	Old Steinitz defense, Nimzovich attack
C62	Ruy Lopez	Old Steinitz defense
C63	Ruy Lopez	Schliemann defense, Berger Variation
C63	Ruy Lopez	Schliemann defense
C60	Ruy Lopez	Nuernberg Variation
C60	Ruy Lopez	Brentano defense
C60	Ruy Lopez	Fianchetto (Smyslov/Barnes) defense
C60	Ruy Lopez	Pollock defense
C61	Ruy Lopez	Bird's defense, Paulsen Variation
C61	Ruy Lopez	Bird's defense
C65	Ruy Lopez	Berlin defense, Kaufmann Variation
C65	Ruy Lopez	Berlin defense, Anderssen Variation
C65	Ruy Lopez	Berlin defense, Duras Variation
C65	Ruy Lopez	Berlin defense, Mortimer trap
C65	Ruy Lopez	Berlin defense, Mortimer Variation
C65	Ruy Lopez	Berlin defense, Nyholm attack
C65	Ruy Lopez	Berlin defense, Beverwijk Variation
C66	Ruy Lopez	Closed Berlin defense, Bernstein Variation
C66	Ruy Lopez	Closed Berlin defense, Showalter Variation
C66	Ruy Lopez	Berlin defense, Tarrasch trap
C66	Ruy Lopez	Berlin defense, hedgehog Variation
C66	Ruy Lopez	Closed Berlin defense, Wolf Variation
C66	Ruy Lopez	Closed Berlin defense, Chigorin Variation
C66	Ruy Lopez	Berlin defense, 4.O-O, d6
C67	Ruy Lopez	Berlin defense, Rosenthal Variation
C67	Ruy Lopez	Berlin defense, Minckwitz Variation
C67	Ruy Lopez	Berlin defense, Trifunovic Variation
C67	Ruy Lopez	Berlin defense, Rio de Janeiro Variation
C67	Ruy Lopez	Berlin defense, Zukertort Variation
C67	Ruy Lopez	Berlin defense, Pillsbury Variation
C67	Ruy Lopez	Berlin defense, Winawer attack
C67	Ruy Lopez	Berlin defense, Cordel Variation
C67	Ruy Lopez	Open Berlin defense, 5...Be7
C67	Ruy Lopez	Open Berlin defense, Showalter Variation
C67	Ruy Lopez	Open Berlin defense, l'Hermet Variation
C67	Ruy Lopez	Berlin defense, Open Variation
C65	Ruy Lopez	Berlin defense, 4.O-O
C65	Ruy Lopez	Berlin defense
C60	Ruy Lopez	Cozio defense, Paulsen Variation
C60	Ruy Lopez	Cozio defense
C60	Ruy Lopez	Vinogradov Variation
C60	Ruy Lopez (Spanish Opening)	Steinitz Variation
C51	Evans gambit declined, Showalter Variation 	Canal Variation
C51	Evans gambit declined, 5.a4	Canal Variation
C51	Evans gambit declined, Pavlov Variation 	Canal Variation
C51	Evans gambit declined, Lange Variation 	Canal Variation
C51	Evans gambit declined, Vasquez Variation 	Canal Variation
C51	Evans gambit declined, Hicken Variation 	Canal Variation
C51	Evans gambit declined, Hirschbach Variation 	Canal Variation
C51	Evans gambit declined, Cordel Variation 	Canal Variation
C52	Evans gambit	Leonhardt Variation
C52	Evans gambit	Sokolsky Variation
C52	Evans gambit	Levenfish Variation
C52	Evans gambit	Tartakower attack
C52	Evans gambit	Leonhardt Variation
C52	Evans gambit	compromised defense, Paulsen Variation
C52	Evans gambit	compromised defense, Potter Variation
C52	Evans gambit	compromised defense
C52	Evans gambit	Lasker defense
C52	Evans gambit	Sanders-Alapin Variation
C52	Evans gambit	Alapin-Steinitz Variation
C52	Evans gambit	Waller attack
C52	Evans gambit	Richardson attack
C52	Evans gambit	Richardson attack
C52	Evans gambit	Sokolsky Variation
C52	Evans gambit	Cordel Variation
C51	Evans gambit	Ulvestad Variation
C51	Evans gambit	Paulsen Variation
C51	Evans gambit	Morphy attack
C51	Evans gambit	Goering attack
C51	Evans gambit	Steinitz Variation
C51	Evans gambit	Steinitz Variation
C51	Evans gambit	Fraser attack
C51	Evans gambit	Fraser-Mortimer attack
C51	Evans gambit	normal Variation
C51	Evans gambit	Stone-Ware Variation
C51	Evans gambit	Cordel Variation
C51	Evans gambit	5...Be7
C51	Evans gambit	Mayet defense
C51	Evans gambit	Canal Variation
C51	Evans counter-gambit	Canal Variation
C51	Evans gambit declined	Canal Variation
C50	Giuoco Piano	Jerome gambit
C53	Giuoco Piano	LaBourdonnais Variation
C53	Giuoco Piano	Bird's attack
C54	Giuoco Piano	Krause Variation
C54	Giuoco Piano	Cracow Variation
C54	Giuoco Piano	Aitken Variation
C54	Giuoco Piano	Steinitz Variation
C54	Giuoco Piano	Moeller (Therkatz) attack
C54	Giuoco Piano	Therkatz-Herzog Variation
C54	Giuoco Piano	Moeller, bayonet attack
C54	Giuoco Piano	Greco Variation
C54	Giuoco Piano	Bernstein Variation
C54	Giuoco Piano	Aitken Variation
C54	Giuoco Piano	Greco's attack
C54	Giuoco Piano	Anderssen Variation
C53	Giuoco Piano	Anderssen Variation
C53	Giuoco Piano	Ghulam Kassim Variation
C53	Giuoco Piano	Ghulam Kassim Variation
C53	Giuoco Piano	Bird's attack
C53	Giuoco Piano	Eisinger Variation
C53	Giuoco Piano	Mestel Variation
C53	Giuoco Piano	Eisinger Variation
C53	Giuoco Piano	Tarrasch Variation
C53	Giuoco Piano	center-hOlding Variation
C53	Giuoco Piano	close Variation
C53	Giuoco Piano	Alapin-Steinitz Variation
C50	Giuoco Pianissimo	Dubois Variation
C50	Giuoco Pianissimo	Canal Variation
C50	Giuoco Pianissimo	Italian Four knights Variation
C50	Giuoco Pianissimo	Dubois Variation
C50	Giuoco Pianissimo	Jerome gambit
C50	Giuoco Piano	Four knights Variation
C50	Giuoco Piano	Tartakower Variation
C50	Hungarian defense	Tartakower Variation
C50	Hungarian defense	Nimzovich (Paulsen) Variation
C50	Rousseau gambit	Nimzovich (Paulsen) Variation
C50	Blackburne shilling gambit	Nimzovich (Paulsen) Variation
C55	Two knights defense (Modern Bishop's Opening)	Holzhausen attack
C55	Two knights defense, Keidanz Variation 	Holzhausen attack
C55	Two knights defense, Perreux Variation 	Holzhausen attack
C55	Two knights	Max Lange attack, Schlechter Variation
C55	Two knights	Max Lange attack, Berger Variation
C55	Two knights	Max Lange attack, Marshall Variation
C55	Two knights	Max Lange attack, Rubinstein Variation
C55	Two knights	Max Lange attack, Loman defense
C55	Two knights	Max Lange attack, Krause Variation
C55	Two knights	Max Lange attack, Steinitz Variation
C55	Two knights	Max Lange attack
C56	Two knights defense	Yurdansky attack
C56	Two knights defense	Canal Variation
C56	Two knights defense	Max Lange attack, Krause Variation
C55	Two knights defense	Holzhausen attack
C55	Two knights defense	Holzhausen attack
C57	Two knights defense	Wilkes Barre (Traxler) Variation
C57	Two knights defense	Ulvestad Variation
C58	Two knights defense	Maroczy Variation
C59	Two knights defense	Knorre Variation
C59	Two knights defense	Goering Variation
C59	Two knights defense	Steinitz Variation
C59	Two knights defense	Blackburne Variation
C58	Two knights defense	Blackburne Variation
C58	Two knights defense	Blackburne Variation
C58	Two knights defense	Paoli Variation
C58	Two knights defense	Colman Variation
C58	Two knights defense	Bogolyubov Variation
C58	Two knights defense	Yankovich Variation
C58	Two knights defense	Maroczy Variation
C58	Two knights defense	Kieseritsky Variation
C58	Two knights defense	Fegatello attack, Polerio defense
C57	Two knights defense	Fritz, Gruber Variation
C57	Two knights defense	Fritz Variation
C57	Two knights defense	Pincus Variation
C57	Two knights defense	Lolli attack
C57	Two knights defense	Fegatello attack, Leonhardt Variation
C57	Two knights defense	Fegatello attack, Polerio defense
C57	Two knights defense	Fegatello attack
C57	Two knights defense	Canal Variation
C55	Giuoco piano	Holzhausen attack
C55	Giuoco piano	Rosentreter Variation
C55	Giuoco piano	Rosentreter Variation
C55	Two knights defense	Moeller, bayonet attack
C50	King's pawn game	Nimzovich (Paulsen) Variation
C44	Inverted Hanham	Modern attack, Trifunovic Variation
C44	Tayler Opening	Modern attack, Trifunovic Variation
C44	Inverted Hungarian	Modern attack, Trifunovic Variation
C44	Ponziani	Romanishin Variation
C44	Ponziani	Caro Variation
C44	Ponziani	Steinitz Variation
C44	Ponziani	Leonhardt Variation
C44	Ponziani counter-gambit, Cordel Variation 	Romanishin Variation
C44	Ponziani counter-gambit, Schmidt attack	Romanishin Variation
C44	Ponziani counter-gambit	Romanishin Variation
C44	Ponziani	Fraser defense
C44	Ponziani	Jaenisch counter-attack
C44	Ponziani	Reti Variation
C44	Ponziani Opening	Modern attack, Trifunovic Variation
C44	Dresden Opening	Modern attack, Trifunovic Variation
C44	Scotch	Relfsson gambit ('MacLopez')
C44	Scotch gambit	Vitzhum attack
C44	Scotch gambit	Cochrane Variation
C44	Scotch gambit	Hanneken Variation
C44	Scotch gambit	Hanneken Variation
C44	Scotch gambit	Cochrane-Shumov defense
C44	Scotch gambit	Vitzhum attack
C44	Scotch gambit	Anderssen (Paulsen, Suhle) counter-attack
C44	Scotch gambit	Anderssen (Paulsen, Suhle) counter-attack
C44	Scotch gambit	Benima defense
C44	Scotch gambit	Dubois-Reti defense
C44	Scotch gambit	Goering gambit, Bardeleben Variation
C44	Scotch	Goering gambit, Bardeleben Variation
C44	Scotch	Goering gambit
C44	Scotch	Sea-cadet mate
C44	Scotch	Goering gambit
C45	Scotch	Paulsen, Gunsberg defense
C45	Scotch	Paulsen attack
C45	Scotch	Meitner Variation
C45	Scotch	Gottschall Variation
C45	Scotch	Blackburne attack
C45	Scotch	Blumenfeld attack
C45	Scotch	Romanishin Variation
C45	Scotch	Potter Variation
C45	Scotch game	Tartakower Variation
C45	Scotch	Mieses Variation
C45	Scotch	Tartakower Variation
C45	Scotch	Schmidt Variation
C45	Scotch	Ghulam Kassim Variation
C45	Scotch	Rosenthal Variation
C45	Scotch game	Berger Variation
C45	Scotch	Berger Variation
C45	Scotch	Horwitz attack
C45	Scotch	Steinitz Variation
C45	Scotch	Fraser attack
C45	Scotch	Pulling counter-attack
C45	Scotch game	Dubois-Reti defense
C44	Scotch	Cochrane Variation
C44	Scotch	Lolli Variation
C44	Scotch Opening	Romanishin Variation
C44	Konstantinopolsky Opening	Modern attack, Trifunovic Variation
C46	Three knights	Schlechter Variation
C46	Three knights	Winawer defense (Gothic defense)
C46	Three knights	Steinitz, Rosenthal Variation
C46	Three knights	Steinitz Variation
C46	Four knights	Gunsberg Variation
C48	Four knights	Spielmann Variation
C48	Four knights	Ranken Variation
C49	Four knights	Nimzovich (Paulsen) Variation
C49	Four knights	Svenonius Variation
C49	Four knights	Janowski Variation
C49	Four knights	Alatortsev Variation
C49	Four knights	Symmetrical, Tarrasch Variation
C49	Four knights	Symmetrical, Capablanca Variation
C49	Four knights	Symmetrical, Metger unpin
C49	Four knights	Symmetrical, Blake Variation
C49	Four knights	Symmetrical, Pillsbury Variation
C49	Four knights	Symmetrical, Maroczy system
C49	Four knights	Symmetrical Variation
C49	Four knights	Alatortsev Variation
C49	Four knights	double Ruy Lopez
C49	Four knights	Gunsberg counter-attack
C49	Four knights	double Ruy Lopez
C48	Four knights	Marshall Variation
C48	Four knights	Bardeleben Variation
C48	Four knights	Spanish, Classical defense
C48	Four knights	Rubinstein counter-gambit Maroczy Variation
C48	Four knights	Rubinstein counter-gambit, 5.Be2
C48	Four knights	Rubinstein counter-gambit, Exchange Variation
C48	Four knights	Rubinstein counter-gambit, Bogolyubov Variation
C48	Four knights	Rubinstein counter-gambit, Henneberger Variation
C48	Four knights	Rubinstein counter-gambit
C48	Four knights	Spanish Variation
C46	Four knights	Italian Variation
C47	Four knights	Scotch, Krause Variation
C47	Four knights	Belgrade gambit
C47	Four knights	Scotch, 4...exd4
C47	Four knights	Scotch Variation
C46	Four knights	Schultze-Mueller gambit
C46	Four knights game	Steinitz, Rosenthal Variation
C46	Three knights game	Romanishin Variation
C44	Irish (Chicago) gambit	Modern attack, Trifunovic Variation
C44	King's pawn game	Modern attack, Trifunovic Variation
C42	Petrov	Italian Variation
C43	Petrov	Urusov gambit
C43	Petrov	Modern attack, Bardeleben Variation
C43	Petrov	Modern attack, Steinitz Variation
C43	Petrov	Modern attack, Main line
C43	Petrov	Modern attack, Trifunovic Variation
C43	Petrov	Modern attack, Symmetrical Variation
C43	Petrov	Modern (Steinitz) attack
C42	Petrov Three knights game	Damiano Variation
C42	Petrov	Paulsen attack
C42	Petrov	Kaufmann attack
C42	Petrov	French attack
C42	Petrov	Classical attack, Marshall trap
C42	Petrov	Classical attack, Tarrasch Variation
C42	Petrov	Classical attack, Marshall Variation
C42	Petrov	Classical attack, Jaenisch Variation
C42	Petrov	Classical attack, Berger Variation
C42	Petrov	Classical attack, Krause Variation
C42	Petrov	Classical attack, Maroczy Variation
C42	Petrov	Classical attack, Chigorin Variation
C42	Petrov	Classical attack, Mason Variation
C42	Petrov	Classical attack, close Variation
C42	Petrov	Classical attack
C42	Petrov	Nimzovich attack
C42	Petrov	Cozio (Lasker) attack
C42	Petrov	Cochrane gambit
C42	Petrov	Damiano Variation
C42	Petrov's defense	Hanham, Delmar Variation
C40	Gunderam defense	Kieseritsky, Rice gambit
C40	Greco defense	Kieseritsky, Rice gambit
C40	King's knight Opening	Kieseritsky, Rice gambit
C20	KP	Napoleon's Opening
C20	KP	Patzer Opening
C20	King's pawn game	Winawer, Advance, poisoned pawn, Konstantinopolsky Variation
C00	French	Reti (Spielmann) Variation
C00	French defense, Steiner Variation 	Najdorf, 7...Be7 Main line
C00	French	Reversed Philidor formation
C00	French	King's Indian attack
C00	St. George defense	Reversed Philidor formation
C00	French	Schlechter Variation
C00	French	Alapin Variation
C02	French	Advance, Euwe Variation
C02	French	Advance, Milner-Barry gambit
C02	French	Advance, Paulsen attack
C02	French	Advance Variation
C02	French	Advance, Wade Variation
C02	French	Advance Variation
C02	French	Advance, Steinitz Variation
C02	French	Advance, Nimzovich system
C02	French	Advance, Nimzovich Variation
C02	French	Advance Variation
C01	French	Exchange, Bogolyubov Variation
C01	French	Exchange, Svenonius Variation
C01	French	Exchange Variation
C15	French	Winawer, fingerslip Variation
C15	French	Winawer, Kondratiyev Variation
C19	French	Winawer, Advance, Smyslov Variation
C19	French	Winawer, Advance, positional Main line
C19	French	Winawer, Advance, poisoned pawn, Euwe-Gligoric Variation
C19	French	Winawer, Advance, poisoned pawn, Konstantinopolsky Variation
C19	French	Winawer, Advance, poisoned pawn Variation
C19	French	Winawer, Advance, 6...Ne7
C18	French	Winawer, Classical Variation
C18	French	Winawer, Advance Variation
C17	French	Winawer, Advance, Rauzer Variation
C17	French	Winawer, Advance, 5.a3
C17	French	Winawer, Advance, Bogolyubov Variation
C17	French	Winawer, Advance, Russian Variation
C17	French	Winawer, Advance Variation
C16	French	Winawer, Petrosian Variation
C16	French	Winawer, Advance Variation
C15	French	Winawer, Alekhine gambit
C15	French	Winawer, Alekhine (Maroczy) gambit
C15	French	Winawer, Alekhine gambit, Alatortsev Variation
C15	French	Winawer, Alekhine gambit, Kan Variation
C15	French	Winawer (Nimzovich) Variation
C10	French	Marshall Variation
C10	French	Fort Knox Variation
C10	French	Rubinstein, Capablanca line
C10	French	Rubinstein Variation
C10	French	Frere (Becker) Variation
C10	French	Rubinstein Variation
C11	French	Swiss Variation
C11	French	Henneberger Variation
C12	French	MacCutcheon, Dr. Olland (Dutch) Variation
C12	French	MacCutcheon, Lasker Variation , 8...g6
C12	French	MacCutcheon, Duras Variation
C12	French	MacCutcheon, Lasker Variation
C12	French	MacCutcheon, Tartakower Variation
C12	French	MacCutcheon, Janowski Variation
C12	French	MacCutcheon, Bernstein Variation
C12	French	MacCutcheon, Grigoriev Variation
C12	French	MacCutcheon, Chigorin Variation
C12	French	MacCutcheon, Advance Variation
C12	French	MacCutcheon, Bogolyubov Variation
C12	French	MacCutcheon Variation
C13	French	Classical, Anderssen-Richter Variation
C13	French	Classical, Anderssen Variation
C13	French	Classical, Tartakower Variation
C14	French	Classical, Tarrasch Variation
C14	French	Classical, Stahlberg Variation
C14	French	Classical, Steinitz Variation
C14	French	Classical, Alapin Variation
C14	French	Classical, Rubinstein Variation
C14	French	Classical, Pollock Variation
C14	French	Classical Variation
C13	French	Albin-Alekhine-Chatard attack, Maroczy Variation
C13	French	Albin-Alekhine-Chatard attack, Breyer Variation
C13	French	Albin-Alekhine-Chatard attack, Teichmann Variation
C13	French	Albin-Alekhine-Chatard attack, Spielmann Variation
C13	French	Albin-Alekhine-Chatard attack
C13	French	Classical, Frankfurt Variation
C13	French	Classical, Vistaneckis (Nimzo) Variation
C13	French	Classical
C11	French	Burn Variation
C11	French	Steinitz, Bradford attack
C11	French	Steinitz, Brodsky-Jones Variation
C11	French	Steinitz Variation
C11	French	Steinitz, Boleslavsky Variation
C11	French	Steinitz Variation
C11	French	Steinitz, Gledhill attack
C11	French	Steinitz Variation
C11	French defense	Frere (Becker) Variation
C10	French	Paulsen Variation
C09	French	Tarrasch, Open Variation , Main line
C08	French	Tarrasch, Open, 4.ed ed
C07	French	Tarrasch, Eliskases Variation
C07	French	Tarrasch, Open Variation
C03	French	Tarrasch, Haberditz Variation
C04	French	Tarrasch, Guimard Main line
C03	French	Tarrasch, Guimard Variation
C05	French	Tarrasch, Botvinnik Variation
C06	French	Tarrasch, Leningrad Variation
C06	French	Tarrasch, Closed Variation , Main line
C05	French	Tarrasch, Closed Variation
C05	French	Tarrasch, Closed Variation
C03	French	Tarrasch
C00	French defense	Reversed Philidor formation
C00	Lengfellner system	Reversed Philidor formation
C00	French defense	Reversed Philidor formation
C00	French	Steinitz attack
C00	French	Labourdonnais Variation
C00	French	Pelikan Variation
C00	French	Two knights Variation
C00	French defense	Wing gambit
C00	French	Wing gambit
C00	French defense	Labourdonnais Variation
C00	French	Chigorin Variation
C00	French defense	Najdorf, 7...Be7 Main line
B00	Fred	Ilyin-Genevsky Variation with b3
B00	Fried fox defense	Ilyin-Genevsky Variation with b3
B00	Barnes defense	Ilyin-Genevsky Variation with b3
B00	Reversed Grob (Borg/Basman defense/macho Grob)	Ilyin-Genevsky Variation with b3
B06	Robatsch defense	Three pawns attack
B06	Robatsch defense	Gurgenidze Variation
B06	Robatsch defense	Pseudo-Austrian attack
B06	Robatsch defense	Two knights, Suttles Variation
B06	Robatsch defense	Two knights Variation
B06	Robatsch (Modern) defense	Gurgenidze Variation
B06	Robatsch defense	Three pawns attack
B07	Robatsch defense	Geller's system
A41	Robatsch defense	Rossolimo Variation
B06	Robatsch (Modern) defense	Modern, Vitolins attack
B06	Norwegian defense	Modern, Vitolins attack
B06	Robatsch (Modern) defense	Modern, Vitolins attack
B00	Carr's defense	Ilyin-Genevsky Variation with b3
B00	Lemming defense	Ilyin-Genevsky Variation with b3
B00	KP	Nimzovich defense, Wheeler gambit
B00	KP	Nimzovich defense, Marshall gambit
B00	KP	Nimzovich defense, Bogolyubov Variation
B00	KP	Neo-Mongoloid defense
B00	KP	Nimzovich defense
B00	KP	Colorado counter
B00	KP	Nimzovich defense
B00	KP	Nimzovich defense
B02	Alekhine's defense	Krejcik Variation
B02	Alekhine's defense	Maroczy Variation
B02	Alekhine's defense	Welling Variation
B02	Alekhine's defense	Kmoch Variation
B02	Alekhine's defense	Steiner Variation
B02	Alekhine's defense	Two pawns' attack, Mikenas Variation
B02	Alekhine's defense	Two pawns' (Lasker's) attack
B02	Alekhine's defense	Welling Variation
B03	Alekhine's defense	O'Sullivan gambit
B03	Alekhine's defense	Balogh Variation
B03	Alekhine's defense	Exchange, Karpov Variation
B03	Alekhine's defense	Exchange Variation
B03	Alekhine's defense	Four pawns attack, Trifunovic Variation
B03	Alekhine's defense	Four pawns attack, Korchnoi Variation
B03	Alekhine's defense	Four pawns attack, Tartakower Variation
B03	Alekhine's defense	Four pawns attack, 7.Be3
B03	Alekhine's defense	Four pawns attack, Ilyin-Genevsky var.
B03	Alekhine's defense	Four pawns attack, 6...Nc6
B03	Alekhine's defense	Four pawns attack, Planinc Variation
B03	Alekhine's defense	Four pawns attack, Fianchetto Variation
B03	Alekhine's defense	Four pawns attack
B03	Alekhine's defense	Balogh Variation
B05	Alekhine's defense	Modern, Flohr Variation
B05	Alekhine's defense	Modern, Vitolins attack
B05	Alekhine's defense	Modern, Alekhine Variation
B05	Alekhine's defense	Modern, Panov Variation
B05	Alekhine's defense	Modern Variation , 4...Bg4
B04	Alekhine's defense	Modern, Larsen Variation
B04	Alekhine's defense	Modern, Keres Variation
B04	Alekhine's defense	Modern, Fianchetto Variation
B04	Alekhine's defense	Modern, Schmid Variation
B04	Alekhine's defense	Modern Variation
B03	Alekhine's defense	O'Sullivan gambit
B03	Alekhine's defense	Two pawns' attack, Mikenas Variation
B02	Alekhine's defense	Saemisch attack
B02	Alekhine's defense	Brooklyn defense
B02	Alekhine's defense	Mokele Mbembe (Buecker) Variation
B02	Alekhine's defense	Brooklyn defense
B02	Alekhine's defense	Spielmann Variation
B02	Alekhine's defense	Scandinavian Variation
B02	Alekhine's defense	Richter Variation
B00	Hippopotamus defense	Ilyin-Genevsky Variation with b3
B00	King's pawn Opening	Ilyin-Genevsky Variation with b3
A00	Hammerschlag (Fried fox/Pork chop Opening)	Romford counter-gambit
A00	Gedult's Opening	Romford counter-gambit
A03	Mujannah Opening	Hobbs gambit
A03	Bird's Opening	Williams gambit
A03	Bird's Opening	Lasker Variation
A03	Bird's Opening	Hobbs gambit
A02	Bird	From gambit, Lasker Variation
A02	Bird	From gambit, Lipke Variation
A02	Bird	From gambit
A02	Bird's Opening, Swiss gambit	From gambit, Lipke Variation
A02	Bird	Hobbs gambit
A02	Bird's Opening	Symmetrical Variation
A00	Benko's Opening	reversed Alekhine
A00	Lasker simul special	Outflank Variation
A00	Benko's Opening	Outflank Variation
A00	Grob	Romford counter-gambit
A00	Grob	Fritz gambit
A00	Grob	Spike attack
A00	Grob's attack	reversed Alekhine
A00	Global Opening	Romford counter-gambit
A00	Clemenz (Mead's, Basman's or de Klerk's) Opening	Romford counter-gambit
A00	Anti-Borg (Desprez) Opening	Romford counter-gambit
A00	Durkin's attack	Romford counter-gambit
A00	Novosibirsk Opening	Romford counter-gambit
A00	Battambang Opening	Romford counter-gambit
A00	Dunst (Sleipner,Heinrichsen) Opening	Romford counter-gambit
A00	Dunst (Sleipner, Heinrichsen) Opening	Romford counter-gambit
A06	Reti	Nimzovich-Larsen attack
A06	Santasiere's folly	Old Indian attack
A09	Reti	Advance Variation
A09	Reti accepted	Keres Variation
A09	Reti accepted	Advance Variation
A09	Reti Opening	King's Indian attack, French Variation
A06	Reti	Old Indian attack
A06	Tennison (Lemberg, Zukertort) gambit	Old Indian attack
A07	Reti	King's Indian attack, Keres Variation
A08	Reti	King's Indian attack, French Variation
A08	Reti	King's Indian attack
A07	Reti	King's Indian attack (with ...c5)
A07	Reti	King's Indian attack, Pachman system
A07	Reti	King's Indian attack
A07	Reti	King's Indian attack, Yugoslav Variation
A07	Reti	King's Indian attack (Barcza system)
A06	Reti Opening	King's Indian attack, Reti-Smyslov Variation
A04	Reti	Wade defense
A04	Reti Opening	Lisitsin gambit deferred
A04	Reti	Lisitsin gambit deferred
A04	Reti	Pirc-Lisitsin gambit
A04	Reti v Dutch	Lasker Variation
A04	Reti	Herrstroem gambit
A05	Reti	King's Indian attack, Spassky's Variation
A05	Reti	King's Indian attack, Reti-Smyslov Variation
A05	Reti	King's Indian attack
A05	Reti Opening	Herrstroem gambit
A04	Reti Opening	Lasker Variation
A00	Amar gambit	Romford counter-gambit
A00	Amar (Paris) Opening	Romford counter-gambit
