All chess openings
Every named opening, gambit, and variation, grouped by ECO code. Click any to see the moves, the position on a board, and what each side is trying to do.
A — Flank & Irregular (791)
- A00 Amar Opening
- A00 Amar Opening: Paris Gambit
- A00 Amar Opening: Paris Gambit, Gent Gambit
- A00 Amsterdam Attack
- A00 Anderssen's Opening
- A00 Anderssen's Opening: Polish Gambit
- A00 Barnes Opening
- A00 Barnes Opening: Fool's Mate
- A00 Barnes Opening: Gedult Gambit
- A00 Barnes Opening: Gedult Gambit
- A00 Barnes Opening: Hammerschlag
- A00 Clemenz Opening
- A00 Clemenz Opening: Spike Lee Gambit
- A00 Creepy Crawly Formation: Classical Defense
- A00 Formation: Hippopotamus Attack
- A00 Formation: Shy Attack
- A00 Global Opening
- A00 Grob Opening
- A00 Grob Opening: Alessi Gambit
- A00 Grob Opening: Double Grob
- A00 Grob Opening: Double Grob, Coca-Cola Gambit
- A00 Grob Opening: Grob Gambit
- A00 Grob Opening: Grob Gambit Declined
- A00 Grob Opening: Grob Gambit, Basman Gambit
- A00 Grob Opening: Grob Gambit, Fritz Gambit
- A00 Grob Opening: Grob Gambit, Fritz Gambit, Romford Countergambit
- A00 Grob Opening: Grob Gambit, Keres Gambit
- A00 Grob Opening: Grob Gambit, Richter-Grob Gambit
- A00 Grob Opening: Keene Defense
- A00 Grob Opening: Keene Defense, Main Line
- A00 Grob Opening: London Defense
- A00 Grob Opening: Romford Countergambit
- A00 Grob Opening: Spike Attack
- A00 Grob Opening: Spike, Hurst Attack
- A00 Grob Opening: Zilbermints Gambit
- A00 Grob Opening: Zilbermints Gambit, Schiller Defense
- A00 Grob Opening: Zilbermints Gambit, Zilbermints-Hartlaub Gambit
- A00 Hungarian Opening
- A00 Hungarian Opening: Asten Gambit
- A00 Hungarian Opening: Bücker Gambit
- A00 Hungarian Opening: Burk Gambit
- A00 Hungarian Opening: Catalan Formation
- A00 Hungarian Opening: Dutch Defense
- A00 Hungarian Opening: Indian Defense
- A00 Hungarian Opening: Myers Defense
- A00 Hungarian Opening: Pachman Gambit
- A00 Hungarian Opening: Paris Gambit
- A00 Hungarian Opening: Reversed Alekhine
- A00 Hungarian Opening: Reversed Brooklyn Defense, Brooklyn Benko Gambit
- A00 Hungarian Opening: Reversed Modern Defense
- A00 Hungarian Opening: Reversed Norwegian Defense
- A00 Hungarian Opening: Sicilian Invitation
- A00 Hungarian Opening: Slav Formation
- A00 Hungarian Opening: Symmetrical Variation
- A00 Hungarian Opening: Van Kuijk Gambit
- A00 Hungarian Opening: Winterberg Gambit
- A00 Kádas Opening
- A00 Kádas Opening: Beginner's Trap
- A00 Kádas Opening: Kádas Gambit
- A00 Kádas Opening: Kádas Gambit
- A00 Kádas Opening: Kádas Gambit
- A00 Kádas Opening: Koola-Koola Variation
- A00 Kádas Opening: Myers Variation
- A00 Kádas Opening: Schneider Gambit
- A00 Kádas Opening: Steinbok Gambit
- A00 Lasker Simul Special
- A00 Mieses Opening
- A00 Mieses Opening: Myers Spike Attack
- A00 Mieses Opening: Reversed Rat
- A00 Mieses Opening: Venezolana Variation
- A00 Polish Opening
- A00 Polish Opening, with d5
- A00 Polish Opening, with d5
- A00 Polish Opening: Baltic Defense
- A00 Polish Opening: Birmingham Gambit
- A00 Polish Opening: Bugayev Advance Variation
- A00 Polish Opening: Bugayev Attack
- A00 Polish Opening: Czech Defense
- A00 Polish Opening: Dutch Defense
- A00 Polish Opening: German Defense
- A00 Polish Opening: Grigorian Variation
- A00 Polish Opening: Karniewski Variation
- A00 Polish Opening: King's Indian Variation
- A00 Polish Opening: King's Indian Variation, Schiffler Attack
- A00 Polish Opening: King's Indian Variation, Sokolsky Attack
- A00 Polish Opening: Myers Variation
- A00 Polish Opening: Outflank Variation
- A00 Polish Opening: Queen's Indian Variation
- A00 Polish Opening: Queenside Defense
- A00 Polish Opening: Rooks Swap Line
- A00 Polish Opening: Schiffler-Sokolsky Variation
- A00 Polish Opening: Schuehler Gambit
- A00 Polish Opening: Symmetrical Variation
- A00 Polish Opening: Tartakower Gambit
- A00 Polish Opening: Wolferts Gambit
- A00 Saragossa Opening
- A00 Sodium Attack
- A00 Sodium Attack: Celadon Variation
- A00 Sodium Attack: Chenoboskion Variation
- A00 Sodium Attack: Durkin Gambit
- A00 Valencia Opening
- A00 Van Geet Opening
- A00 Van Geet Opening: Battambang Variation
- A00 Van Geet Opening: Billockus-Johansen Gambit
- A00 Van Geet Opening: Damhaug Gambit
- A00 Van Geet Opening: Dougherty Gambit
- A00 Van Geet Opening: Dunst-Perrenet Gambit
- A00 Van Geet Opening: Düsseldorf Gambit
- A00 Van Geet Opening: Gladbacher Gambit
- A00 Van Geet Opening: Hector Gambit
- A00 Van Geet Opening: Hergert Gambit
- A00 Van Geet Opening: Hulsemann Gambit
- A00 Van Geet Opening: Jendrossek Gambit
- A00 Van Geet Opening: Kluever Gambit
- A00 Van Geet Opening: Laroche Gambit
- A00 Van Geet Opening: Liebig Gambit
- A00 Van Geet Opening: Melleby Gambit
- A00 Van Geet Opening: Myers Attack
- A00 Van Geet Opening: Napoleon Attack
- A00 Van Geet Opening: Novosibirsk Variation
- A00 Van Geet Opening: Nowokunski Gambit
- A00 Van Geet Opening: Pfeiffer Gambit
- A00 Van Geet Opening: Pfeiffer Gambit, Sleipnir Countergambit
- A00 Van Geet Opening: Reversed Nimzowitsch
- A00 Van Geet Opening: Reversed Scandinavian
- A00 Van Geet Opening: Sicilian Two Knights
- A00 Van Geet Opening: Sleipnir Gambit
- A00 Van Geet Opening: Tübingen Gambit
- A00 Van Geet Opening: Twyble Attack
- A00 Van Geet Opening: Venezolana Variation
- A00 Van Geet Opening: Warsteiner Gambit
- A00 Van't Kruijs Opening
- A00 Van't Kruijs Opening: Bouncing Bishop Variation
- A00 Van't Kruijs Opening: Keoni-Hiva Gambit, Akahi Variation
- A00 Van't Kruijs Opening: Keoni-Hiva Gambit, Alua Variation
- A00 Van't Kruijs Opening: Keoni-Hiva Gambit, Ekolu Variation
- A00 Ware Opening
- A00 Ware Opening: Cologne Gambit
- A00 Ware Opening: Crab Variation
- A00 Ware Opening: Meadow Hay Trap
- A00 Ware Opening: Symmetric Variation
- A00 Ware Opening: Ware Gambit
- A00 Ware Opening: Wing Gambit
- A01 Nimzo-Larsen Attack
- A01 Nimzo-Larsen Attack: Classical Variation
- A01 Nimzo-Larsen Attack: Dutch Variation
- A01 Nimzo-Larsen Attack: English Variation
- A01 Nimzo-Larsen Attack: Graz Attack
- A01 Nimzo-Larsen Attack: Indian Variation
- A01 Nimzo-Larsen Attack: Modern Variation
- A01 Nimzo-Larsen Attack: Modern Variation
- A01 Nimzo-Larsen Attack: Modern Variation
- A01 Nimzo-Larsen Attack: Modern Variation
- A01 Nimzo-Larsen Attack: Pachman Gambit
- A01 Nimzo-Larsen Attack: Polish Variation
- A01 Nimzo-Larsen Attack: Ringelbach Gambit
- A01 Nimzo-Larsen Attack: Spike Variation
- A01 Nimzo-Larsen Attack: Symmetrical Variation
- A02 Bird Opening
- A02 Bird Opening: Batavo-Polish Attack
- A02 Bird Opening: Double Duck Formation
- A02 Bird Opening: From's Gambit
- A02 Bird Opening: From's Gambit, Bahr Gambit
- A02 Bird Opening: From's Gambit, Langheld Gambit
- A02 Bird Opening: From's Gambit, Lasker Variation
- A02 Bird Opening: From's Gambit, Lipke Variation
- A02 Bird Opening: Hobbs Gambit
- A02 Bird Opening: Hobbs-Zilbermints Gambit
- A02 Bird Opening: Horsefly Defense
- A02 Bird Opening: Lasker Gambit
- A02 Bird Opening: Mujannah
- A02 Bird Opening: Myers Defense
- A02 Bird Opening: Platz Gambit
- A02 Bird Opening: Schlechter Gambit
- A02 Bird Opening: Siegener Gambit
- A02 Bird Opening: Swiss Gambit
- A02 Bird Opening: Wagner-Zwitersch Gambit
- A03 Bird Opening: Dutch Variation
- A03 Bird Opening: Dutch Variation, Dudweiler Gambit
- A03 Bird Opening: Lasker Variation
- A03 Bird Opening: Sturm Gambit
- A03 Bird Opening: Thomas Gambit
- A03 Bird Opening: Williams Gambit
- A03 Bird Opening: Williams Gambit
- A03 Bird Opening: Williams-Zilbermints Gambit
- A04 Colle System: Rhamphorhynchus Variation
- A04 Modern Defense: Semi-Averbakh Variation, Polish Variation
- A04 Modern Defense: Semi-Averbakh Variation, Pterodactyl Variation
- A04 Modern Defense: Semi-Averbakh Variation, Pterodactyl Variation Accepted
- A04 Zukertort Defense: Kingside Variation
- A04 Zukertort Defense: Sicilian Knight Variation
- A04 Zukertort Opening
- A04 Zukertort Opening: Arctic Defense
- A04 Zukertort Opening: Arctic Defense, Drunken Knight Variation
- A04 Zukertort Opening: Basman Defense
- A04 Zukertort Opening: Black Mustang Defense
- A04 Zukertort Opening: Drunken Cavalry Variation
- A04 Zukertort Opening: Dutch Variation
- A04 Zukertort Opening: Herrstrom Gambit
- A04 Zukertort Opening: Kingside Fianchetto
- A04 Zukertort Opening: Lisitsyn Gambit
- A04 Zukertort Opening: Lisitsyn Gambit Deferred
- A04 Zukertort Opening: Pirc Invitation
- A04 Zukertort Opening: Polish Defense
- A04 Zukertort Opening: Queen's Gambit Invitation
- A04 Zukertort Opening: Queenside Fianchetto Variation
- A04 Zukertort Opening: Ross Gambit
- A04 Zukertort Opening: Shabalov Gambit
- A04 Zukertort Opening: Sicilian Invitation
- A04 Zukertort Opening: Slav Invitation
- A04 Zukertort Opening: Speelsmet Gambit
- A04 Zukertort Opening: St. George Defense
- A04 Zukertort Opening: The Walrus
- A04 Zukertort Opening: Vos Gambit
- A04 Zukertort Opening: Wade Defense
- A04 Zukertort Opening: Ware Defense
- A05 King's Indian Attack
- A05 King's Indian Attack: Smyslov Variation
- A05 King's Indian Attack: Spassky Variation
- A05 King's Indian Attack: Symmetrical Defense
- A05 King's Indian Attack: Wahls Defense
- A05 Polish Opening: Zukertort System
- A05 Zukertort Opening
- A05 Zukertort Opening
- A05 Zukertort Opening: Double Fianchetto Attack
- A05 Zukertort Opening: Lemberger Gambit
- A05 Zukertort Opening: Myers Polish Attack
- A05 Zukertort Opening: Nimzo-Larsen Variation
- A05 Zukertort Opening: Quiet System
- A06 Nimzo-Larsen Attack: Classical Variation
- A06 Nimzo-Larsen Attack: Norfolk Gambit
- A06 Nimzo-Larsen Attack: Norfolk Gambit
- A06 Zukertort Opening
- A06 Zukertort Opening: Ampel Variation
- A06 Zukertort Opening: Old Indian Attack
- A06 Zukertort Opening: Pachman Gambit
- A06 Zukertort Opening: Regina-Nu Gambit
- A06 Zukertort Opening: Reversed Mexican Defense
- A06 Zukertort Opening: Santasiere's Folly
- A06 Zukertort Opening: Tennison Gambit
- A06 Zukertort Opening: Tennison Gambit, Brigg's Trap
- A06 Zukertort Opening: The Potato
- A07 Hungarian Opening: Wiedenhagen-Beta Gambit
- A07 King's Indian Attack
- A07 King's Indian Attack, with Bf5
- A07 King's Indian Attack, with Bf5
- A07 King's Indian Attack, with Bf5
- A07 King's Indian Attack, with Bf5
- A07 King's Indian Attack, with Bf5
- A07 King's Indian Attack, with e6
- A07 King's Indian Attack, with e6
- A07 King's Indian Attack: Double Fianchetto
- A07 King's Indian Attack: Keres Variation
- A07 King's Indian Attack: Keres Variation
- A07 King's Indian Attack: Keres Variation
- A07 King's Indian Attack: Omega-Delta Gambit
- A07 King's Indian Attack: Pachman System
- A07 King's Indian Attack: Sicilian Variation
- A07 King's Indian Attack: Yugoslav Variation
- A08 King's Indian Attack: French Variation
- A08 King's Indian Attack: Sicilian Variation
- A08 King's Indian Attack: Sicilian Variation
- A08 King's Indian Attack: Sicilian Variation
- A08 Zukertort Opening: Reversed Grünfeld
- A08 Zukertort Opening: Reversed Grünfeld
- A08 Zukertort Opening: Reversed Grünfeld
- A08 Zukertort Opening: Reversed Grünfeld
- A09 Réti Opening
- A09 Réti Opening: Advance Variation
- A09 Réti Opening: Advance Variation, Michel Gambit
- A09 Réti Opening: Advance Variation, Navara Gambit
- A09 Réti Opening: Penguin Variation
- A09 Réti Opening: Réti Accepted
- A09 Réti Opening: Réti Gambit, Keres Variation
- A09 Réti Opening: Reversed Blumenfeld Gambit
- A09 Réti Opening: Zilbermints Gambit
- A10 English Opening
- A10 English Opening: Achilles-Omega Gambit
- A10 English Opening: Adorjan Defense
- A10 English Opening: Anglo-Dutch Defense
- A10 English Opening: Anglo-Dutch Defense, Hickmann Gambit
- A10 English Opening: Anglo-Dutch Variation, Chabanon Gambit
- A10 English Opening: Anglo-Dutch Variation, Ferenc Gambit
- A10 English Opening: Anglo-Lithuanian Variation
- A10 English Opening: Anglo-Scandinavian Defense
- A10 English Opening: Anglo-Scandinavian Defense, Löhn Gambit
- A10 English Opening: Anglo-Scandinavian Defense, Malvinas Variation
- A10 English Opening: Anglo-Scandinavian Defense, Schulz Gambit
- A10 English Opening: Great Snake Variation
- A10 English Opening: Jaenisch Gambit
- A10 English Opening: King's English Variation, Botvinnik System, Prickly Pawn Pass System
- A10 English Opening: Myers Defense
- A10 English Opening: Myers Gambit
- A10 English Opening: Porcupine Variation
- A10 English Opening: Wade Gambit
- A10 English Opening: Zilbermints Gambit
- A11 English Opening: Caro-Kann Defensive System
- A11 Réti Opening: Anglo-Slav Variation, Gurevich System
- A11 Réti Opening: Anglo-Slav Variation, Gurevich System
- A11 Réti Opening: Anglo-Slav Variation, Gurevich System
- A11 Réti Opening: Anglo-Slav Variation, Gurevich System
- A11 Réti Opening: Anglo-Slav Variation, Gurevich System
- A11 Réti Opening: Anglo-Slav Variation, with g3
- A11 Réti Opening: Anglo-Slav Variation, with g3
- A11 Réti Opening: Anglo-Slav Variation, with g3
- A11 Réti Opening: Anglo-Slav Variation, with g3
- A11 Réti Opening: Anglo-Slav Variation, with g3
- A11 Réti Opening: Anglo-Slav Variation, with g3
- A12 Réti Opening: Anglo-Slav Variation
- A12 Réti Opening: Anglo-Slav Variation, Bled Variation
- A12 Réti Opening: Anglo-Slav Variation, Bogoljubow Variation
- A12 Réti Opening: Anglo-Slav Variation, Bogoljubow Variation
- A12 Réti Opening: Anglo-Slav Variation, Bogoljubow Variation
- A12 Réti Opening: Anglo-Slav Variation, Bogoljubow Variation
- A12 Réti Opening: Anglo-Slav Variation, Capablanca Variation
- A12 Réti Opening: Anglo-Slav Variation, London Defensive System
- A12 Réti Opening: Anglo-Slav Variation, New York System
- A12 Réti Opening: Anglo-Slav Variation, Torre System
- A12 Réti Opening: Anglo-Slav Variation, with dxc4
- A13 English Opening: Agincourt Defense
- A13 English Opening: Agincourt Defense
- A13 English Opening: Agincourt Defense
- A13 English Opening: Agincourt Defense
- A13 English Opening: Agincourt Defense
- A13 English Opening: Agincourt Defense, Bogoljubow Defense
- A13 English Opening: Agincourt Defense, Catalan Defense
- A13 English Opening: Agincourt Defense, Catalan Defense
- A13 English Opening: Agincourt Defense, Catalan Defense Accepted
- A13 English Opening: Agincourt Defense, Catalan Defense, Semi-Slav Defense
- A13 English Opening: Agincourt Defense, Kurajica Defense
- A13 English Opening: Agincourt Defense, Tarrasch Defense
- A13 English Opening: Agincourt Defense, Wimpy System
- A13 English Opening: Neo-Catalan
- A13 English Opening: Neo-Catalan Declined
- A13 English Opening: Romanishin Gambit
- A14 English Opening: Agincourt Defense, Keres Defense
- A14 English Opening: Agincourt Defense, Neo-Catalan Declined
- A14 English Opening: Agincourt Defense, Neo-Catalan Declined
- A14 English Opening: Agincourt Defense, Neo-Catalan Declined
- A14 English Opening: Agincourt Defense, Neo-Catalan Declined
- A14 English Opening: Agincourt Defense, Neo-Catalan Declined
- A14 English Opening: Agincourt Defense, Neo-Catalan Declined
- A14 English Opening: Agincourt Defense, Neo-Catalan Declined, Early b3
- A14 English Opening: Agincourt Defense, Neo-Catalan Declined, Early b3
- A14 English Opening: Agincourt Defense, Neo-Catalan Declined, Early b3
- A14 Réti Opening: Anglo-Slav Variation
- A14 Réti Opening: Anglo-Slav Variation, Bogoljubow Variation, Stonewall Line
- A15 English Opening: Anglo-Indian Defense
- A15 English Opening: Anglo-Indian Defense, Anti-Anti-Grünfeld
- A15 English Opening: Anglo-Indian Defense, Grünfeld Formation
- A15 English Opening: Anglo-Indian Defense, King's Indian Formation
- A15 English Opening: Anglo-Indian Defense, King's Indian Formation, Double Fianchetto
- A15 English Opening: Anglo-Indian Defense, King's Knight Variation
- A15 English Opening: Anglo-Indian Defense, Old Indian Formation
- A15 English Opening: Anglo-Indian Defense, Queen's Indian Formation
- A15 English Opening: Anglo-Indian Defense, Queen's Indian Formation
- A15 English Opening: Anglo-Indian Defense, Romanishin Variation
- A15 English Opening: Anglo-Indian Defense, Scandinavian Defense
- A15 English Opening: Anglo-Indian Defense, Scandinavian Defense, Exchange Variation
- A15 English Opening: Anglo-Indian Defense, Slav Formation
- A15 English Orangutan
- A15 English Orangutan
- A16 English Opening: Anglo-Grünfeld Defense
- A16 English Opening: Anglo-Grünfeld Defense, Korchnoi Variation
- A16 English Opening: Anglo-Indian Defense, Anglo-Grünfeld Variation
- A16 English Opening: Anglo-Indian Defense, Anglo-Grünfeld Variation
- A16 English Opening: Anglo-Indian Defense, Anglo-Grünfeld Variation
- A16 English Opening: Anglo-Indian Defense, Anglo-Grünfeld Variation
- A16 English Opening: Anglo-Indian Defense, Queen's Knight Variation
- A17 English Opening: Anglo-Indian Defense
- A17 English Opening: Anglo-Indian Defense, Hedgehog System
- A17 English Opening: Anglo-Indian Defense, Nimzo-English
- A17 English Opening: Anglo-Indian Defense, Queen's Indian Formation
- A17 English Opening: Anglo-Indian Defense, Queen's Indian Variation
- A17 English Opening: Anglo-Indian Defense, Zvjaginsev-Krasenkow Attack
- A18 English Opening: Mikenas-Carls Variation
- A18 English Opening: Mikenas-Carls Variation
- A18 English Opening: Mikenas-Carls Variation
- A19 English Opening: Anglo-Indian Defense, Flohr-Mikenas-Carls Variation, Nei Gambit
- A19 English Opening: Mikenas-Carls, Sicilian
- A20 English Opening: Drill Variation
- A20 English Opening: King's English Variation
- A20 English Opening: King's English Variation, Kahiko-Hula Gambit
- A20 English Opening: King's English Variation, Nimzowitsch Variation
- A20 English Opening: King's English Variation, Nimzowitsch-Flohr Variation
- A21 English Opening: King's English Variation
- A21 English Opening: King's English Variation, Keres Defense
- A21 English Opening: King's English Variation, Kramnik-Shirov Counterattack
- A21 English Opening: King's English Variation, Reversed Sicilian
- A21 English Opening: King's English Variation, Smyslov Defense
- A21 English Opening: King's English Variation, Troger Defense
- A22 English Opening: Carls-Bremen System
- A22 English Opening: King's English Variation, Adhiban Gambit
- A22 English Opening: King's English Variation, Bellon Gambit
- A22 English Opening: King's English Variation, Two Knights Variation
- A22 English Opening: King's English Variation, Two Knights Variation, Reversed Dragon
- A22 English Opening: King's English Variation, Two Knights Variation, Smyslov System
- A22 English Opening: King's English, Erbenheimer Gambit
- A22 English Opening: King's English, Mazedonisch
- A23 English Opening: King's English Variation, Two Knights Variation, Keres Variation
- A23 English Opening: King's English Variation, Two Knights Variation, Keres Variation
- A24 English Opening: King's English Variation, Two Knights Variation, Fianchetto Line
- A25 English Opening: Closed, Taimanov Variation
- A25 English Opening: Closed, Taimanov Variation
- A25 English Opening: King's English Variation, Bremen-Hort Variation
- A25 English Opening: King's English Variation, Closed System
- A25 English Opening: King's English Variation, Hungarian Attack
- A25 English Opening: King's English Variation, Reversed Closed Sicilian
- A25 English Opening: King's English Variation, Taimanov Variation
- A26 English Opening: King's English Variation, Botvinnik System
- A26 English Opening: King's English Variation, Closed System, Full Symmetry
- A27 English Opening: King's English Variation, Three Knights System
- A28 English Opening: Four Knights System, Nimzowitsch Variation
- A28 English Opening: King's English Variation, Four Knights Variation
- A28 English Opening: King's English Variation, Four Knights Variation
- A28 English Opening: King's English Variation, Four Knights Variation, Bradley Beach Variation
- A28 English Opening: King's English Variation, Four Knights Variation, Flexible Line
- A28 English Opening: King's English Variation, Four Knights Variation, Korchnoi Line
- A28 English Opening: King's English Variation, Four Knights Variation, Quiet Line
- A28 English Opening: King's English Variation, Four Knights Variation, Quiet Line
- A28 English Opening: King's English Variation, Four Knights Variation, Quiet Line
- A29 English Opening: King's English Variation, Four Knights Variation, Fianchetto Line
- A29 English Opening: King's English Variation, Four Knights Variation, Fianchetto Line
- A29 English Opening: King's English Variation, Four Knights Variation, Fianchetto Line
- A29 English Opening: King's English Variation, Four Knights Variation, Fianchetto Line
- A29 English Opening: King's English Variation, Four Knights Variation, Fianchetto Line, Delayed .. Nc6
- A29 English Opening: King's English Variation, Four Knights Variation, Fianchetto Line, with .. d6
- A29 English Opening: King's English Variation, Four Knights Variation, Fianchetto Line, with .. d6
- A29 English Opening: King's English Variation, Four Knights Variation, Fianchetto Line, with .. d6, a6
- A29 English Opening: King's English Variation, Four Knights Variation, Fianchetto Line, with .. d6, Be7
- A29 English Opening: King's English Variation, Four Knights Variation, Fianchetto Line, with .. d6, h6
- A29 English Opening: King's English Variation, Four Knights Variation, Fianchetto Line, with Bc5
- A29 English Opening: King's English Variation, Four Knights Variation, Fianchetto Line, with Nb6
- A30 English Opening: Symmetrical Variation
- A30 English Opening: Symmetrical Variation
- A30 English Opening: Symmetrical Variation, Hedgehog Defense
- A30 English Opening: Symmetrical Variation, Napolitano Gambit
- A30 English Opening: Symmetrical, Hedgehog, Flexible Formation
- A30 English Opening: Wing Gambit
- A31 English Opening: Symmetrical Variation, Anti-Benoni Variation
- A32 English Opening: Symmetrical Variation, Anti-Benoni Variation, Spielmann Defense
- A33 English Opening: Symmetrical Variation, Anti-Benoni Variation, Geller Variation
- A33 English Opening: Symmetrical Variation, Anti-Benoni Variation, Spielmann Defense
- A34 English Opening: Symmetrical Variation
- A34 English Opening: Symmetrical Variation, Fianchetto Variation
- A34 English Opening: Symmetrical Variation, Normal Variation
- A34 English Opening: Symmetrical Variation, Rubinstein Variation
- A34 English Opening: Symmetrical Variation, Rubinstein Variation
- A34 English Opening: Symmetrical Variation, Three Knights Variation
- A35 English Opening: Symmetrical Variation
- A35 English Opening: Symmetrical Variation, Four Knights Variation
- A35 English Opening: Symmetrical Variation, Two Knights Variation
- A36 English Opening: Symmetrical Variation, Botvinnik System
- A36 English Opening: Symmetrical Variation, Botvinnik System Reversed, with e3
- A36 English Opening: Symmetrical Variation, Two Knights, Fianchetto Variation
- A36 English Opening: Symmetrical Variation, Ultra-Symmetrical Variation
- A37 English Opening: Symmetrical Variation, Botvinnik System Reversed, with Nf3
- A37 English Opening: Symmetrical Variation, Botvinnik System Reversed, with Nf3
- A37 English Opening: Symmetrical Variation, Botvinnik System Reversed, with Nf3
- A37 English Opening: Symmetrical Variation, Botvinnik System Reversed, with Nf3
- A37 English Opening: Symmetrical Variation, Botvinnik System Reversed, with Nf3
- A37 English Opening: Symmetrical Variation, Botvinnik System Reversed, with Nf3
- A37 English Opening: Symmetrical Variation, Three Knights, Fianchetto Variation
- A38 English Opening: Symmetrical Variation, Double Fianchetto
- A38 English Opening: Symmetrical Variation, Duchamp Variation
- A38 English Opening: Symmetrical Variation, Full Symmetry Line
- A39 English Opening: Symmetrical Variation, Mecking Variation
- A40 Australian Defense
- A40 Benoni Defense: Franco-Sicilian Hybrid
- A40 Borg Defense: Borg Gambit
- A40 Colle System: Pterodactyl Variation
- A40 Colle System: Siroccopteryx Variation
- A40 English Defense
- A40 English Defense
- A40 English Defense: Eastbourne Gambit
- A40 English Defense: Hartlaub Gambit Accepted
- A40 English Defense: Hartlaub Gambit Declined
- A40 English Defense: Perrin Variation
- A40 English Defense: Poli Gambit
- A40 Englund Gambit
- A40 Englund Gambit Declined
- A40 Englund Gambit Declined: Diemer Counterattack
- A40 Englund Gambit Declined: Reversed Alekhine
- A40 Englund Gambit Declined: Reversed Brooklyn
- A40 Englund Gambit Declined: Reversed French
- A40 Englund Gambit Declined: Reversed Krebs
- A40 Englund Gambit Declined: Reversed Mokele Mbembe
- A40 Englund Gambit: Felbecker Gambit
- A40 Englund Gambit: Hartlaub-Charlick Gambit
- A40 Englund Gambit: Main Line
- A40 Englund Gambit: Mosquito Gambit
- A40 Englund Gambit: Soller Gambit
- A40 Englund Gambit: Soller Gambit Deferred
- A40 Englund Gambit: Stockholm Variation
- A40 Englund Gambit: Zilbermints Gambit
- A40 Horwitz Defense
- A40 Horwitz Defense: Zilbermints Gambit
- A40 Kangaroo Defense
- A40 Kangaroo Defense: Keres Defense, Transpositional Variation
- A40 Mikenas Defense
- A40 Mikenas Defense: Cannstatter Variation
- A40 Mikenas Defense: Lithuanian Variation
- A40 Mikenas Defense: Pozarek Gambit
- A40 Modern Defense: Beefeater Variation
- A40 Modern Defense: Lizard Defense, Pirc-Diemer Gambit
- A40 Montevideo Defense
- A40 Polish Defense
- A40 Polish Defense: Spassky Gambit Accepted
- A40 Pterodactyl Defense: Central, Benoni Beefeater Pterodactyl
- A40 Pterodactyl Defense: Central, Benoni Pterodactyl
- A40 Pterodactyl Defense: Fianchetto, Queen Benoni Pterodactyl
- A40 Pterodactyl Defense: Fianchetto, Queen Pteranodon
- A40 Pterodactyl Defense: Fianchetto, Queen Pterodactyl
- A40 Pterodactyl Defense: Queen Pterodactyl, Quiet Line
- A40 Queen's Pawn Game
- A40 Queen's Pawn Game: Anglo-Slav Opening
- A40 Queen's Pawn Game: Modern Defense
- A40 Slav Indian: Kudischewitsch Gambit
- A40 Zaire Defense
- A41 Modern Defense
- A41 Modern Defense: Neo-Modern Defense
- A41 Old Indian Defense
- A41 Queen's Pawn Game
- A41 Rat Defense: English Rat
- A41 Rat Defense: English Rat, Lisbon Gambit
- A41 Rat Defense: English Rat, Pounds Gambit
- A41 Robatsch Defense
- A41 Wade Defense
- A41 Zukertort Opening: Wade Defense, Chigorin Plan
- A42 Modern Defense: Averbakh System
- A42 Modern Defense: Averbakh Variation, Pseudo-Sämisch
- A42 Modern Defense: Kotov Variation
- A42 Modern Defense: Randspringer Variation
- A42 Pterodactyl Defense
- A42 Pterodactyl Defense: Central, Bogolubovia
- A43 Benoni Defense: Benoni Gambit Accepted
- A43 Benoni Defense: Benoni Gambit, Schlenker Defense
- A43 Benoni Defense: Benoni-Indian Defense
- A43 Benoni Defense: Benoni-Indian Defense, Kingside Move Order
- A43 Benoni Defense: Benoni-Staunton Gambit
- A43 Benoni Defense: Cormorant Gambit
- A43 Benoni Defense: French Benoni
- A43 Benoni Defense: Hawk Variation
- A43 Benoni Defense: Old Benoni
- A43 Benoni Defense: Old Benoni
- A43 Benoni Defense: Old Benoni
- A43 Benoni Defense: Old Benoni, Mujannah Formation
- A43 Benoni Defense: Old Benoni, Schmid Variation
- A43 Benoni Defense: Snail Variation
- A43 Benoni Defense: Woozle
- A43 Benoni Defense: Zilbermints-Benoni Gambit
- A43 Benoni Defense: Zilbermints-Benoni Gambit
- A43 Benoni Defense: Zilbermints-Benoni Gambit, Tamarkin Countergambit
- A43 Indian Defense: Pseudo-Benko
- A43 Queen's Pawn Game: Liedmann Gambit
- A44 Benoni Defense: Old Benoni
- A44 Benoni Defense: Semi-Benoni
- A45 Amazon Attack: Siberian Attack
- A45 Canard Opening
- A45 Indian Defense
- A45 Indian Defense: Accelerated London System
- A45 Indian Defense: Gedult Attack
- A45 Indian Defense: Gibbins-Weidenhagen Gambit
- A45 Indian Defense: Gibbins-Weidenhagen Gambit Accepted
- A45 Indian Defense: Gibbins-Weidenhagen Gambit, Maltese Falcon
- A45 Indian Defense: Gibbins-Weidenhagen Gambit, Oshima Defense
- A45 Indian Defense: Gibbins-Weidenhagen Gambit, Stummer Gambit
- A45 Indian Defense: Lazard Gambit
- A45 Indian Defense: Maddigan Gambit
- A45 Indian Defense: Omega Gambit
- A45 Indian Defense: Omega Gambit, Arafat Gambit
- A45 Indian Defense: Paleface Attack, Blackmar-Diemer Gambit Deferred
- A45 Indian Defense: Pawn Push Variation
- A45 Indian Defense: Reversed Chigorin Defense
- A45 Indian Defense: Tartakower Attack
- A45 Paleface Attack
- A45 Queen's Pawn Game: Chigorin Variation
- A45 Queen's Pawn Game: Veresov, Richter Attack
- A45 Trompowsky Attack
- A45 Trompowsky Attack: Borg Variation
- A45 Trompowsky Attack: Classical Defense
- A45 Trompowsky Attack: Classical Defense, Big Center Variation
- A45 Trompowsky Attack: Edge Variation
- A45 Trompowsky Attack: Edge Variation, Hergert Gambit
- A45 Trompowsky Attack: Edge Variation, Hergert Gambit
- A45 Trompowsky Attack: Poisoned Pawn Variation
- A45 Trompowsky Attack: Raptor Variation
- A45 Trompowsky Attack: Raptor Variation, Hergert Gambit
- A46 Döry Defense
- A46 Indian Defense: Czech-Indian
- A46 Indian Defense: Knights Variation
- A46 Indian Defense: Knights Variation, Alburt-Miles Variation
- A46 Indian Defense: London System
- A46 Indian Defense: Polish Variation
- A46 Indian Defense: Spielmann-Indian
- A46 Indian Defense: Wade-Tartakower Defense
- A46 Queen's Pawn Game: Torre Attack, Breyer Variation
- A46 Queen's Pawn Game: Veresov Attack, Classical Defense
- A46 Torre Attack: Classical Defense
- A46 Torre Attack: Classical Defense, Nimzowitsch Variation
- A46 Torre Attack: Classical Defense, Petrosian Gambit
- A46 Torre Attack: Wagner Gambit
- A46 Yusupov-Rubinstein System
- A47 Indian Defense: Schnepper Gambit
- A47 Marienbad System
- A47 Marienbad System: Berg Variation
- A47 Pseudo Queen's Indian Defense
- A47 Pseudo Queen's Indian Defense
- A48 East Indian Defense
- A48 Indian Defense: Colle System, King's Indian Variation
- A48 London System
- A48 London System
- A48 London System
- A48 London System, with Bd3
- A48 London System, with Be2
- A48 London System, with Be2
- A48 London System, with Be2
- A48 Queen's Pawn Game: Barry Attack
- A48 Queen's Pawn Game: Barry Attack
- A48 Queen's Pawn Game: Barry Attack, Grünfeld Variation
- A48 Queen's Pawn Game: Barry Attack, Tarzan Attack
- A48 Queen's Pawn Game: Torre Attack, Grünfeld Variation, Main Line
- A48 Torre Attack: Fianchetto Defense
- A48 Torre Attack: Fianchetto Defense, Euwe Variation
- A49 Indian Defense: Przepiorka Variation
- A50 Indian Defense: Medusa Gambit
- A50 Indian Defense: Normal Variation
- A50 Indian Defense: Pyrenees Gambit
- A50 Mexican Defense
- A50 Mexican Defense: Horsefly Gambit
- A50 Queen's Indian Accelerated
- A50 Slav Indian
- A51 Indian Defense: Budapest Defense
- A51 Indian Defense: Budapest Defense, Fajarowicz Defense, Bonsdorf Variation
- A51 Indian Defense: Budapest Defense, Fajarowicz Variation
- A51 Indian Defense: Budapest Defense, Fajarowicz-Steiner Variation
- A52 Indian Defense: Budapest Defense
- A52 Indian Defense: Budapest Defense, Adler Variation
- A52 Indian Defense: Budapest Defense, Alekhine Variation
- A52 Indian Defense: Budapest Defense, Alekhine Variation, Abonyi Variation
- A52 Indian Defense: Budapest Defense, Alekhine Variation, Tartakower Defense
- A52 Indian Defense: Budapest Defense, Rubinstein Variation
- A53 Old Indian Defense
- A53 Old Indian Defense: Aged Gibbon Gambit
- A53 Old Indian Defense: Czech Variation, with Nc3
- A53 Old Indian Defense: Czech Variation, with Nf3
- A53 Old Indian Defense: Janowski Variation
- A53 Old Indian Defense: Janowski Variation, Fianchetto Variation
- A53 Old Indian Defense: Janowski Variation, Grinberg Gambit
- A53 Old Indian Defense: Janowski Variation, Main Line
- A54 Old Indian Defense: Duz-Khotimirsky Variation
- A54 Old Indian Defense: Tartakower-Indian
- A54 Old Indian Defense: Two Knights Variation
- A54 Old Indian Defense: Ukrainian Variation
- A55 Old Indian Defense: Normal Variation
- A56 Benoni Defense
- A56 Benoni Defense: Czech Benoni Defense
- A56 Benoni Defense: Hromádka System
- A56 Benoni Defense: King's Indian System
- A56 Benoni Defense: Weenink Variation
- A56 Grünfeld Defense: Three Knights Variation, Burille Variation, Reversed Tarrasch
- A56 Vulture Defense
- A57 Benko Gambit
- A57 Benko Gambit Accepted
- A57 Benko Gambit Accepted: Dlugy Variation
- A57 Benko Gambit Accepted: Modern Variation
- A57 Benko Gambit Accepted: Pawn Return Variation
- A57 Benko Gambit Declined: Bishop Attack
- A57 Benko Gambit Declined: Hjørring Countergambit
- A57 Benko Gambit Declined: Main Line
- A57 Benko Gambit Declined: Pseudo-Sämisch
- A57 Benko Gambit Declined: Quiet Line
- A57 Benko Gambit Declined: Sosonko Variation
- A57 Benko Gambit: Mutkin Countergambit
- A57 Benko Gambit: Nescafe Frappe Attack
- A57 Benko Gambit: Zaitsev System
- A57 Benko Gambit: Zaitsev Variation, Nescafe Frappe Attack
- A58 Benko Gambit Accepted: Central Storming Variation
- A58 Benko Gambit Accepted: Fianchetto Variation
- A58 Benko Gambit Accepted: Fully Accepted Variation
- A58 Benko Gambit: Fianchetto Variation
- A58 Benko Gambit: Nd2 Variation
- A59 Benko Gambit
- A59 Benko Gambit Accepted: King Walk Variation
- A59 Benko Gambit Accepted: Yugoslav
- A59 Benko Gambit Accepted: Yugoslav
- A60 Benoni Defense: Modern Variation
- A60 Benoni Defense: Modern Variation, Snake Variation
- A61 Benoni Defense
- A61 Benoni Defense: Fianchetto Variation
- A61 Benoni Defense: Knight's Tour Variation
- A61 Benoni Defense: Uhlmann Variation
- A62 Benoni Defense: Fianchetto Variation
- A63 Benoni Defense: Fianchetto Variation, Hastings Defense
- A64 Benoni Defense: Fianchetto Variation, Hastings Defense, Main Line
- A65 Benoni Defense: King's Pawn Line
- A65 Benoni Defense: King's Pawn Line
- A65 Benoni Defense: King's Pawn Line
- A65 Benoni Defense: King's Pawn Line, with Be3
- A65 Benoni Defense: King's Pawn Line, with Bg5
- A65 Benoni Defense: King's Pawn Line, with Bg5
- A65 Benoni Defense: King's Pawn Line, with Bg5
- A65 Benoni Defense: King's Pawn Line, with Nge2
- A65 Benoni Defense: King's Pawn Line, with Nge2
- A66 Benoni Defense: Mikenas Variation
- A66 Benoni Defense: Pawn Storm Variation
- A67 Benoni Defense: Taimanov Variation
- A68 Benoni Defense: Four Pawns Attack
- A69 Benoni Defense: Four Pawns Attack, Main Line
- A70 Benoni Defense: Classical Variation
- A70 Benoni Defense: Classical Variation, New York Variation
- A70 Benoni Defense: Classical Variation, Traditional Variation
- A71 Benoni Defense: Classical Variation, Averbakh-Grivas Attack
- A72 Benoni Defense: Classical Variation
- A73 Benoni Defense: Classical Variation, Main Line
- A74 Benoni Defense: Classical Variation, Full Line
- A75 Benoni Defense: Classical Variation, Argentine Counterattack
- A76 Benoni Defense: Classical Variation, Czerniak Defense
- A77 Benoni Defense: Classical Variation, Czerniak Defense, Tal Line
- A78 Benoni Defense: Classical Variation, Czerniak Defense
- A79 Benoni Defense: Classical Variation, Czerniak Defense
- A80 Dutch Defense
- A80 Dutch Defense: Alapin Variation
- A80 Dutch Defense: Hevendehl Gambit
- A80 Dutch Defense: Hopton Attack
- A80 Dutch Defense: Janzen-Korchnoi Gambit
- A80 Dutch Defense: Kingfisher Gambit
- A80 Dutch Defense: Korchnoi Attack
- A80 Dutch Defense: Krejcik Gambit
- A80 Dutch Defense: Krejcik Gambit, Tate Gambit
- A80 Dutch Defense: Manhattan Gambit, Anti-Classical Line
- A80 Dutch Defense: Manhattan Gambit, Anti-Leningrad
- A80 Dutch Defense: Manhattan Gambit, Anti-Modern
- A80 Dutch Defense: Manhattan Gambit, Anti-Stonewall
- A80 Dutch Defense: Omega-Isis Gambit
- A80 Dutch Defense: Raphael Variation
- A80 Dutch Defense: Senechaud Gambit
- A80 Dutch Defense: Spielmann Gambit
- A80 Queen's Pawn Game: Veresov Attack, Dutch System
- A81 Dutch Defense: Blackburne Variation
- A81 Dutch Defense: Fianchetto Attack
- A81 Dutch Defense: Leningrad Variation, Carlsbad Variation
- A81 Dutch Defense: Leningrad, Basman System
- A81 Dutch Defense: Semi-Leningrad Variation
- A82 Dutch Defense: Blackmar's Second Gambit
- A82 Dutch Defense: Staunton Gambit
- A82 Dutch Defense: Staunton Gambit Accepted
- A82 Dutch Defense: Staunton Gambit, American Attack
- A82 Dutch Defense: Staunton Gambit, Tartakower Variation
- A82 Rat Defense: Balogh Defense
- A83 Dutch Defense: Staunton Gambit
- A83 Dutch Defense: Staunton Gambit, Alekhine Variation
- A83 Dutch Defense: Staunton Gambit, Chigorin Variation
- A83 Dutch Defense: Staunton Gambit, Lasker Variation
- A83 Dutch Defense: Staunton Gambit, Nimzowitsch Variation
- A84 Dutch Defense
- A84 Dutch Defense: Bellon Gambit
- A84 Dutch Defense: Bladel Variation
- A84 Dutch Defense: Classical Variation
- A84 Dutch Defense: Krause Variation
- A84 Dutch Defense: Normal Variation
- A84 Dutch Defense: Rubinstein Variation
- A85 Dutch Defense: Queen's Knight Variation
- A86 Dutch Defense: Fianchetto Variation
- A86 Dutch Defense: Hort-Antoshin System
- A86 Dutch Defense: Leningrad Variation
- A87 Dutch Defense: Leningrad Variation
- A88 Dutch Defense: Leningrad Variation, Warsaw Variation
- A89 Dutch Defense: Leningrad Variation, Matulovic Variation
- A90 Dutch Defense: Classical Variation
- A90 Dutch Defense: Classical Variation
- A90 Dutch Defense: Nimzo-Dutch Variation
- A90 Dutch Defense: Nimzo-Dutch Variation, Alekhine Variation
- A90 Dutch Defense: Stonewall Variation, Modern Variation
- A91 Dutch Defense: Classical Variation
- A91 Dutch Defense: Classical Variation, Blackburne Attack
- A92 Dutch Defense: Alekhine Variation
- A92 Dutch Defense: Classical Variation
- A92 Dutch Defense: Stonewall Variation
- A92 Dutch Defense: Stonewall Variation
- A93 Dutch Defense: Stonewall Variation, Botvinnik Variation
- A94 Dutch Defense: Stonewall Variation
- A95 Dutch Defense: Stonewall Variation
- A95 Dutch Defense: Stonewall Variation, Chekhover Variation
- A96 Dutch Defense: Classical Variation
- A96 Dutch Defense: Classical Variation, Buenos Aires Variation
- A96 Dutch Defense: Classical Variation, Huisl Variation
- A97 Dutch Defense: Classical Variation, Ilyin-Zhenevsky Variation
- A97 Dutch Defense: Classical Variation, Ilyin-Zhenevsky Variation, Winter Variation
- A98 Dutch Defense: Classical Variation, Ilyin-Zhenevsky Variation, Alatortsev-Lisitsyn Line
- A99 Dutch Defense: Classical Variation, Ilyin-Zhenevsky Variation, Modern Main Line
B — Semi-Open (1.e4) (760)
- B00 Barnes Defense
- B00 Borg Defense
- B00 Borg Defense: Borg Gambit
- B00 Borg Defense: Troon Gambit
- B00 Borg Defense: Zilbermints Gambit
- B00 Carr Defense
- B00 Carr Defense: Zilbermints Gambit
- B00 Duras Gambit
- B00 Fried Fox Defense
- B00 Goldsmith Defense
- B00 Goldsmith Defense: Picklepuss Defense
- B00 Hippopotamus Defense
- B00 Hippopotamus Defense
- B00 King's Pawn Game
- B00 Lemming Defense
- B00 Lion Defense: Lion's Jaw
- B00 Nimzowitsch Defense
- B00 Nimzowitsch Defense
- B00 Nimzowitsch Defense: Breyer Variation
- B00 Nimzowitsch Defense: Colorado Countergambit
- B00 Nimzowitsch Defense: Colorado Countergambit Accepted
- B00 Nimzowitsch Defense: Declined Variation
- B00 Nimzowitsch Defense: El Columpio Defense
- B00 Nimzowitsch Defense: El Columpio Defense, El Columpio Gambit
- B00 Nimzowitsch Defense: El Columpio Defense, Exchange Variation
- B00 Nimzowitsch Defense: El Columpio Defense, Pin Variation
- B00 Nimzowitsch Defense: Franco-Nimzowitsch Variation
- B00 Nimzowitsch Defense: French Connection
- B00 Nimzowitsch Defense: Hornung Gambit
- B00 Nimzowitsch Defense: Kennedy Variation
- B00 Nimzowitsch Defense: Kennedy Variation, Bielefelder Gambit
- B00 Nimzowitsch Defense: Kennedy Variation, de Smet Gambit
- B00 Nimzowitsch Defense: Kennedy Variation, Hammer Gambit
- B00 Nimzowitsch Defense: Kennedy Variation, Herford Gambit
- B00 Nimzowitsch Defense: Kennedy Variation, Keres Attack
- B00 Nimzowitsch Defense: Kennedy Variation, Linksspringer Variation
- B00 Nimzowitsch Defense: Kennedy Variation, Main Line
- B00 Nimzowitsch Defense: Kennedy Variation, Paulsen Attack
- B00 Nimzowitsch Defense: Kennedy Variation, Riemann Defense
- B00 Nimzowitsch Defense: Mikenas Variation
- B00 Nimzowitsch Defense: Neo-Mongoloid Defense
- B00 Nimzowitsch Defense: Pirc Connection
- B00 Nimzowitsch Defense: Pseudo-Spanish Variation
- B00 Nimzowitsch Defense: Scandinavian Variation
- B00 Nimzowitsch Defense: Scandinavian Variation, Aachen Gambit
- B00 Nimzowitsch Defense: Scandinavian Variation, Advance Variation
- B00 Nimzowitsch Defense: Scandinavian Variation, Bogoljubow Variation
- B00 Nimzowitsch Defense: Scandinavian Variation, Bogoljubow Variation
- B00 Nimzowitsch Defense: Scandinavian Variation, Bogoljubow Variation, Brandics Gambit
- B00 Nimzowitsch Defense: Scandinavian Variation, Bogoljubow Variation, Erben Gambit
- B00 Nimzowitsch Defense: Scandinavian Variation, Bogoljubow Variation, Heinola-Deppe Gambit
- B00 Nimzowitsch Defense: Scandinavian Variation, Bogoljubow Variation, Nimzowitsch Gambit
- B00 Nimzowitsch Defense: Scandinavian Variation, Bogoljubow Variation, Richter Gambit
- B00 Nimzowitsch Defense: Scandinavian Variation, Bogoljubow Variation, Vehre Variation
- B00 Nimzowitsch Defense: Scandinavian Variation, Exchange Variation
- B00 Nimzowitsch Defense: Scandinavian Variation, Exchange Variation, Marshall Gambit
- B00 Nimzowitsch Defense: Wheeler Gambit
- B00 Nimzowitsch Defense: Williams Variation
- B00 Nimzowitsch Defense: Woodchuck Variation
- B00 Owen Defense
- B00 Owen Defense: Guatemala Defense
- B00 Owen Defense: Hekili-Loa Gambit
- B00 Owen Defense: Matovinsky Gambit
- B00 Owen Defense: Naselwaus Gambit
- B00 Owen Defense: Smith Gambit
- B00 Owen Defense: Unicorn Variation
- B00 Owen Defense: Wind Gambit
- B00 Pirc Defense
- B00 Pirc Defense
- B00 Pirc Defense
- B00 Pirc Defense: Roscher Gambit
- B00 Rat Defense: Antal Defense
- B00 Rat Defense: Fuller Gambit
- B00 Rat Defense: Harmonist
- B00 Rat Defense: Petruccioli Attack
- B00 Rat Defense: Spike Attack
- B00 St. George Defense
- B00 St. George Defense: Polish Variation
- B00 St. George Defense: San Jorge Variation
- B00 St. George Defense: Zilbermints Gambit
- B00 Van Geet Opening: Berlin Gambit
- B00 Ware Defense
- B00 Ware Defense: Snagglepuss Defense
- B01 Scandinavian Defense
- B01 Scandinavian Defense
- B01 Scandinavian Defense: Anderssen Counterattack
- B01 Scandinavian Defense: Anderssen Counterattack, Collijn Variation
- B01 Scandinavian Defense: Anderssen Counterattack, Goteborg System
- B01 Scandinavian Defense: Anderssen Counterattack, Orthodox Attack
- B01 Scandinavian Defense: Blackburne Gambit
- B01 Scandinavian Defense: Blackburne-Kloosterboer Gambit
- B01 Scandinavian Defense: Boehnke Gambit
- B01 Scandinavian Defense: Bronstein Variation
- B01 Scandinavian Defense: Classical Variation
- B01 Scandinavian Defense: Grünfeld Variation
- B01 Scandinavian Defense: Gubinsky-Melts Defense
- B01 Scandinavian Defense: Icelandic-Palme Gambit
- B01 Scandinavian Defense: Kádas Gambit
- B01 Scandinavian Defense: Kiel Variation
- B01 Scandinavian Defense: Kloosterboer Gambit
- B01 Scandinavian Defense: Lasker Variation
- B01 Scandinavian Defense: Main Line
- B01 Scandinavian Defense: Main Line, Leonhardt Gambit
- B01 Scandinavian Defense: Main Line, Mieses Variation
- B01 Scandinavian Defense: Marshall Variation
- B01 Scandinavian Defense: Mieses-Kotroc Variation
- B01 Scandinavian Defense: Modern Variation
- B01 Scandinavian Defense: Modern Variation
- B01 Scandinavian Defense: Modern Variation, Gipslis Variation
- B01 Scandinavian Defense: Modern Variation, Wing Gambit
- B01 Scandinavian Defense: Panov Transfer
- B01 Scandinavian Defense: Portuguese Gambit
- B01 Scandinavian Defense: Portuguese Gambit, Banker Variation
- B01 Scandinavian Defense: Portuguese Gambit, Classical Variation
- B01 Scandinavian Defense: Portuguese Gambit, Correspondence Refutation
- B01 Scandinavian Defense: Portuguese Gambit, Elbow Variation
- B01 Scandinavian Defense: Portuguese Gambit, Jadoul Variation
- B01 Scandinavian Defense: Portuguese Gambit, Lusophobe Variation
- B01 Scandinavian Defense: Portuguese Gambit, Melbourne Shuffle Variation
- B01 Scandinavian Defense: Portuguese Gambit, Wuss Variation
- B01 Scandinavian Defense: Richter Variation
- B01 Scandinavian Defense: Richter Variation
- B01 Scandinavian Defense: Schiller-Pytel Variation
- B01 Scandinavian Defense: Schiller-Pytel Variation, Modern Variation
- B01 Scandinavian Defense: Valencian Variation
- B01 Scandinavian Defense: Valencian Variation, Ilundain Variation
- B01 Scandinavian Defense: Valencian Variation, Main Line
- B01 Scandinavian Defense: Zilbermints Gambit
- B01 Van Geet Opening: Grünfeld Defense
- B02 Alekhine Defense
- B02 Alekhine Defense: Brooklyn Variation
- B02 Alekhine Defense: Brooklyn Variation, Everglades Variation
- B02 Alekhine Defense: Buckley Attack
- B02 Alekhine Defense: Hunt Variation, Lasker Simul Gambit
- B02 Alekhine Defense: Hunt Variation, Matsukevich Gambit
- B02 Alekhine Defense: Hunt Variation, Mikenas Gambit
- B02 Alekhine Defense: Kmoch Variation
- B02 Alekhine Defense: Krejcik Variation
- B02 Alekhine Defense: Krejcik Variation, Krejcik Gambit
- B02 Alekhine Defense: Maróczy Variation
- B02 Alekhine Defense: Mokele Mbembe
- B02 Alekhine Defense: Mokele Mbembe, Modern Line
- B02 Alekhine Defense: Mokele Mbembe, Vavra Defense
- B02 Alekhine Defense: Normal Variation
- B02 Alekhine Defense: Sämisch Attack
- B02 Alekhine Defense: Scandinavian Variation
- B02 Alekhine Defense: Scandinavian Variation, Geschev Gambit
- B02 Alekhine Defense: Scandinavian Variation, Myers Gambit
- B02 Alekhine Defense: Spielmann Gambit
- B02 Alekhine Defense: Steiner Variation
- B02 Alekhine Defense: The Squirrel
- B02 Alekhine Defense: Two Pawns Attack
- B02 Alekhine Defense: Two Pawns Attack, Lasker Variation
- B02 Alekhine Defense: Two Pawns Attack, Mikenas Variation
- B02 Alekhine Defense: Two Pawns Attack, Tate Variation
- B02 Alekhine Defense: Welling Variation
- B03 Alekhine Defense
- B03 Alekhine Defense
- B03 Alekhine Defense
- B03 Alekhine Defense: Balogh Variation
- B03 Alekhine Defense: Exchange Variation
- B03 Alekhine Defense: Exchange Variation, Karpov Variation
- B03 Alekhine Defense: Exchange Variation, Voronezh Variation
- B03 Alekhine Defense: Four Pawns Attack
- B03 Alekhine Defense: Four Pawns Attack, Cambridge Gambit
- B03 Alekhine Defense: Four Pawns Attack, Fianchetto Variation
- B03 Alekhine Defense: Four Pawns Attack, Ilyin-Zhenevsky Variation
- B03 Alekhine Defense: Four Pawns Attack, Korchnoi Variation
- B03 Alekhine Defense: Four Pawns Attack, Main Line
- B03 Alekhine Defense: Four Pawns Attack, Tartakower Variation
- B03 Alekhine Defense: Four Pawns Attack, Trifunovic Variation
- B03 Alekhine Defense: Hunt Variation
- B03 Alekhine Defense: Modern Variation, Alekhine Gambit
- B03 Alekhine Defense: O'Sullivan Gambit
- B04 Alekhine Defense: Modern Variation
- B04 Alekhine Defense: Modern Variation, Alburt Variation
- B04 Alekhine Defense: Modern Variation, Keres Variation
- B04 Alekhine Defense: Modern Variation, Larsen Variation
- B04 Alekhine Defense: Modern Variation, Larsen-Haakert Variation
- B04 Alekhine Defense: Modern Variation, Schmid Variation
- B05 Alekhine Defense: Modern Variation, Alekhine Variation
- B05 Alekhine Defense: Modern Variation, Flohr Variation
- B05 Alekhine Defense: Modern Variation, Main Line
- B05 Alekhine Defense: Modern Variation, Panov Variation
- B05 Alekhine Defense: Modern Variation, Vitolins Attack
- B06 Modern Defense
- B06 Modern Defense
- B06 Modern Defense: Anti-Modern
- B06 Modern Defense: Bishop Attack
- B06 Modern Defense: Bishop Attack, Bücker Gambit
- B06 Modern Defense: Bishop Attack, Monkey's Bum
- B06 Modern Defense: Dunworthy Variation
- B06 Modern Defense: Fianchetto Gambit
- B06 Modern Defense: Gurgenidze Defense
- B06 Modern Defense: Lizard Defense, Mittenberger Gambit
- B06 Modern Defense: Masur Gambit
- B06 Modern Defense: Modern Pterodactyl
- B06 Modern Defense: Mongredien Defense, with Nc3
- B06 Modern Defense: Mongredien Defense, with Nf3
- B06 Modern Defense: Norwegian Defense
- B06 Modern Defense: Norwegian Defense, Norwegian Gambit
- B06 Modern Defense: Pseudo-Austrian Attack
- B06 Modern Defense: Semi-Averbakh Variation, Pterodactyl Variation Declined
- B06 Modern Defense: Standard Defense
- B06 Modern Defense: Standard Line
- B06 Modern Defense: Three Pawns Attack
- B06 Modern Defense: Two Knights Variation
- B06 Modern Defense: Two Knights Variation, Suttles Variation
- B06 Modern Defense: Two Knights Variation, Suttles Variation, Tal Gambit
- B06 Modern Defense: Westermann Gambit
- B06 Modern Defense: Wind Gambit
- B06 Pterodactyl Defense: Austrian, Austriadactylus Western
- B06 Pterodactyl Defense: Austrian, Grand Prix Pterodactyl
- B06 Pterodactyl Defense: Austrian, Pteranodon
- B06 Pterodactyl Defense: Central, Anhanguera
- B06 Pterodactyl Defense: Central, Benoni Quetzalcoatlus
- B06 Pterodactyl Defense: Central, Quetzalcoatlus Gambit
- B06 Pterodactyl Defense: Eastern, Anhanguera
- B06 Pterodactyl Defense: Eastern, Benoni
- B06 Pterodactyl Defense: Eastern, Benoni Pteranodon
- B06 Pterodactyl Defense: Eastern, Benoni Pterodactyl
- B06 Pterodactyl Defense: Eastern, Pteranodon
- B06 Pterodactyl Defense: Eastern, Pterodactyl
- B06 Pterodactyl Defense: Eastern, Rhamphorhynchus
- B06 Pterodactyl Defense: Fianchetto, King Pterodactyl
- B06 Pterodactyl Defense: Fianchetto, Rhamphorhynchus
- B06 Pterodactyl Defense: Sicilian, Quetzalcoatlus
- B06 Pterodactyl Defense: Sicilian, Siroccopteryx
- B06 Pterodactyl Defense: Western, Anhanguera
- B06 Pterodactyl Defense: Western, Siroccopteryx
- B06 Rat Defense: Accelerated Gurgenidze
- B07 Czech Defense
- B07 King's Pawn Game: Maróczy Defense
- B07 Lion Defense
- B07 Lion Defense: Anti-Philidor
- B07 Lion Defense: Anti-Philidor, Lion's Cave
- B07 Lion Defense: Anti-Philidor, Lion's Cave, Lion Claw Gambit
- B07 Lion Defense: Bayonet Attack
- B07 Modern Defense: Geller's System
- B07 Pirc Defense
- B07 Pirc Defense: 150 Attack
- B07 Pirc Defense: 150 Attack, Inner Doll Defense
- B07 Pirc Defense: 150 Attack, Sveshnikov-Jansa Attack
- B07 Pirc Defense: Bayonet Attack
- B07 Pirc Defense: Byrne Variation
- B07 Pirc Defense: Chinese Variation
- B07 Pirc Defense: Kholmov System
- B07 Pirc Defense: Sveshnikov System
- B08 Pirc Defense: Classical Variation
- B08 Pirc Defense: Classical Variation
- B08 Pirc Defense: Classical Variation, Quiet System
- B08 Pirc Defense: Classical Variation, Quiet System, Chigorin Line
- B08 Pirc Defense: Classical Variation, Quiet System, Czech Defense
- B08 Pirc Defense: Classical Variation, Quiet System, Parma Defense
- B08 Pirc Defense: Classical Variation, Schlechter Variation
- B09 Pirc Defense: Austrian Attack
- B09 Pirc Defense: Austrian Attack
- B09 Pirc Defense: Austrian Attack, Dragon Formation
- B09 Pirc Defense: Austrian Attack, Kurajica Variation
- B09 Pirc Defense: Austrian Attack, Ljubojevic Variation
- B09 Pirc Defense: Austrian Attack, Unzicker Attack
- B09 Pirc Defense: Austrian Attack, Unzicker Attack, Bronstein Variation
- B09 Pirc Defense: Austrian Attack, Weiss Variation
- B10 Caro-Kann Defense
- B10 Caro-Kann Defense
- B10 Caro-Kann Defense
- B10 Caro-Kann Defense: Accelerated Panov Attack
- B10 Caro-Kann Defense: Accelerated Panov Attack
- B10 Caro-Kann Defense: Accelerated Panov Attack, Modern Variation
- B10 Caro-Kann Defense: Accelerated Panov Attack, Open Variation
- B10 Caro-Kann Defense: Accelerated Panov Attack, Pseudo-Scandinavian
- B10 Caro-Kann Defense: Accelerated Panov Attack, Van Weersel Attack
- B10 Caro-Kann Defense: Apocalypse Attack
- B10 Caro-Kann Defense: Breyer Variation
- B10 Caro-Kann Defense: Breyer Variation, Stein Attack
- B10 Caro-Kann Defense: Dinic Gambit
- B10 Caro-Kann Defense: Endgame Offer
- B10 Caro-Kann Defense: Endgame Variation
- B10 Caro-Kann Defense: Euwe Attack
- B10 Caro-Kann Defense: Goldman Variation
- B10 Caro-Kann Defense: Hector Gambit
- B10 Caro-Kann Defense: Hillbilly Attack
- B10 Caro-Kann Defense: Hillbilly Attack, Schaeffer Gambit
- B10 Caro-Kann Defense: Labahn Attack
- B10 Caro-Kann Defense: Labahn Attack, Double Gambit
- B10 Caro-Kann Defense: Labahn Attack, Polish Variation
- B10 Caro-Kann Defense: Scorpion-Horus Gambit
- B10 Caro-Kann Defense: Spike Variation
- B10 Caro-Kann Defense: Spike Variation, Scorpion-Grob Gambit
- B10 Caro-Kann Defense: St. Patrick's Attack
- B10 Caro-Kann Defense: Toikkanen Gambit
- B10 Caro-Kann Defense: Two Knights Attack
- B11 Caro-Kann Defense: Two Knights Attack, Mindeno Variation
- B11 Caro-Kann Defense: Two Knights Attack, Mindeno Variation, Exchange Line
- B11 Caro-Kann Defense: Two Knights Attack, Mindeno Variation, Retreat Line
- B12 Caro-Kann Defense
- B12 Caro-Kann Defense
- B12 Caro-Kann Defense: Advance Variation
- B12 Caro-Kann Defense: Advance Variation, Bayonet Attack
- B12 Caro-Kann Defense: Advance Variation, Botvinnik-Carls Defense
- B12 Caro-Kann Defense: Advance Variation, Bronstein Variation
- B12 Caro-Kann Defense: Advance Variation, Prins Attack
- B12 Caro-Kann Defense: Advance Variation, Short Variation
- B12 Caro-Kann Defense: Advance Variation, Tal Variation
- B12 Caro-Kann Defense: Advance Variation, Van der Wiel Attack
- B12 Caro-Kann Defense: Advance Variation, Van der Wiel Attack
- B12 Caro-Kann Defense: Advance Variation, Van der Wiel Attack, Dreyev Defense
- B12 Caro-Kann Defense: Advance, Short Variation
- B12 Caro-Kann Defense: De Bruycker Defense
- B12 Caro-Kann Defense: De Bruycker Defense
- B12 Caro-Kann Defense: Edinburgh Variation
- B12 Caro-Kann Defense: Maróczy Variation
- B12 Caro-Kann Defense: Maróczy Variation, Maróczy Gambit
- B12 Caro-Kann Defense: Masi Variation
- B12 Caro-Kann Defense: Massachusetts Defense
- B12 Caro-Kann Defense: Mieses Attack, Landau Gambit
- B12 Caro-Kann Defense: Mieses Gambit
- B12 Caro-Kann Defense: Modern Variation
- B12 Caro-Kann Defense: Ulysses Gambit
- B13 Caro-Kann Defense: Exchange Variation
- B13 Caro-Kann Defense: Exchange Variation
- B13 Caro-Kann Defense: Exchange Variation
- B13 Caro-Kann Defense: Exchange Variation
- B13 Caro-Kann Defense: Exchange Variation, Bulla Attack
- B13 Caro-Kann Defense: Exchange Variation, Rubinstein Variation
- B13 Caro-Kann Defense: Panov Attack
- B13 Caro-Kann Defense: Panov Attack
- B13 Caro-Kann Defense: Panov Attack, Gunderam Attack
- B13 Caro-Kann Defense: Panov Attack, Modern Defense
- B13 Caro-Kann Defense: Panov Attack, Modern Defense, Carlsbad Line
- B13 Caro-Kann Defense: Panov Attack, Modern Defense, Czerniak Line
- B13 Caro-Kann Defense: Panov Attack, Modern Defense, Mieses Line
- B13 Caro-Kann Defense: Panov Attack, Modern Defense, Reifir-Spielmann Line
- B13 Caro-Kann Defense: Panov-Botvinnik, Herzog Defense
- B14 Caro-Kann Defense: Panov Attack
- B14 Caro-Kann Defense: Panov Attack, Fianchetto Defense
- B14 Caro-Kann Defense: Panov Attack, Fianchetto Defense, Fianchetto Gambit
- B14 Caro-Kann Defense: Panov Attack, Main Line
- B15 Caro-Kann Defense
- B15 Caro-Kann Defense
- B15 Caro-Kann Defense: Alekhine Gambit
- B15 Caro-Kann Defense: Alien Gambit
- B15 Caro-Kann Defense: Campomanes Attack
- B15 Caro-Kann Defense: Forgacs Variation
- B15 Caro-Kann Defense: Gurgenidze Counterattack
- B15 Caro-Kann Defense: Gurgenidze System
- B15 Caro-Kann Defense: Main Line
- B15 Caro-Kann Defense: Rasa-Studier Gambit
- B15 Caro-Kann Defense: Tartakower Variation
- B15 Caro-Kann Defense: Tartakower Variation, Perlis Line
- B15 Caro-Kann Defense: von Hennig Gambit
- B16 Caro-Kann Defense: Bronstein-Larsen Variation
- B16 Caro-Kann Defense: Finnish Variation
- B17 Caro-Kann Defense: Karpov Variation
- B17 Caro-Kann Defense: Karpov Variation, Modern Main Line
- B17 Caro-Kann Defense: Karpov Variation, Modern Variation
- B17 Caro-Kann Defense: Karpov Variation, Modern Variation, Ivanchuk Defense
- B17 Caro-Kann Defense: Karpov Variation, Modern Variation, Kasparov Attack
- B17 Caro-Kann Defense: Karpov Variation, Smyslov Variation
- B17 Caro-Kann Defense: Karpov Variation, Smyslov Variation, Main Line
- B17 Caro-Kann Defense: Karpov Variation, Tiviakov-Fischer Attack
- B18 Caro-Kann Defense: Classical Variation
- B18 Caro-Kann Defense: Classical Variation, Flohr Variation
- B18 Caro-Kann Defense: Classical Variation, Main Line
- B18 Caro-Kann Defense: Classical Variation, Maróczy Attack
- B18 Caro-Kann Defense: Martian Gambit
- B19 Caro-Kann Defense: Classical Variation
- B19 Caro-Kann Defense: Classical Variation, Lobron System
- B19 Caro-Kann Defense: Classical Variation, Seirawan Variation
- B19 Caro-Kann Defense: Classical Variation, Spassky Variation
- B20 Sicilian Defense
- B20 Sicilian Defense: Amazon Attack
- B20 Sicilian Defense: Big Clamp Formation
- B20 Sicilian Defense: Bowdler Attack
- B20 Sicilian Defense: Brick Variation
- B20 Sicilian Defense: Czerniak Attack
- B20 Sicilian Defense: Czerniak Attack, Queen Fianchetto Variation
- B20 Sicilian Defense: Euwe Attack, Prins Gambit
- B20 Sicilian Defense: Gloria Variation
- B20 Sicilian Defense: Grob Variation
- B20 Sicilian Defense: Keres Variation
- B20 Sicilian Defense: King David's Opening
- B20 Sicilian Defense: Kronberger Variation
- B20 Sicilian Defense: Kronberger Variation, Nemeth Gambit
- B20 Sicilian Defense: Lasker-Dunne Attack
- B20 Sicilian Defense: Mengarini Variation
- B20 Sicilian Defense: Myers Attack, with a4
- B20 Sicilian Defense: Myers Attack, with h4
- B20 Sicilian Defense: Staunton-Cochrane Variation
- B20 Sicilian Defense: Wing Gambit
- B20 Sicilian Defense: Wing Gambit, Abrahams Variation
- B20 Sicilian Defense: Wing Gambit, Carlsbad Variation
- B20 Sicilian Defense: Wing Gambit, Marienbad Variation
- B20 Sicilian Defense: Wing Gambit, Marshall Variation
- B20 Sicilian Defense: Wing Gambit, Nanu Gambit
- B20 Sicilian Defense: Wing Gambit, Romanian Defense
- B20 Sicilian Defense: Wing Gambit, Santasiere Variation
- B21 Bird Opening: Dutch Variation, Batavo Gambit
- B21 Sicilian Defense: Coles Sicilian Gambit
- B21 Sicilian Defense: Halasz Gambit
- B21 Sicilian Defense: McDonnell Attack
- B21 Sicilian Defense: McDonnell Attack, Tal Gambit
- B21 Sicilian Defense: McDonnell Attack, Toilet Variation
- B21 Sicilian Defense: Morphy Gambit
- B21 Sicilian Defense: Morphy Gambit, Andreaschek Gambit
- B21 Sicilian Defense: Smith-Morra Gambit
- B21 Sicilian Defense: Smith-Morra Gambit
- B21 Sicilian Defense: Smith-Morra Gambit Accepted
- B21 Sicilian Defense: Smith-Morra Gambit Accepted, Chicago Defense
- B21 Sicilian Defense: Smith-Morra Gambit Accepted, Chicago Defense
- B21 Sicilian Defense: Smith-Morra Gambit Accepted, Classical Formation
- B21 Sicilian Defense: Smith-Morra Gambit Accepted, Danish Variation
- B21 Sicilian Defense: Smith-Morra Gambit Accepted, Fianchetto Defense
- B21 Sicilian Defense: Smith-Morra Gambit Accepted, Finegold Defense
- B21 Sicilian Defense: Smith-Morra Gambit Accepted, Kan Formation
- B21 Sicilian Defense: Smith-Morra Gambit Accepted, Larsen Defense
- B21 Sicilian Defense: Smith-Morra Gambit Accepted, Morphy Defense
- B21 Sicilian Defense: Smith-Morra Gambit Accepted, Morphy Defense Deferred
- B21 Sicilian Defense: Smith-Morra Gambit Accepted, Paulsen Formation
- B21 Sicilian Defense: Smith-Morra Gambit Accepted, Pin Defense
- B21 Sicilian Defense: Smith-Morra Gambit Accepted, Scheveningen Formation
- B21 Sicilian Defense: Smith-Morra Gambit Accepted, Siberian Variation
- B21 Sicilian Defense: Smith-Morra Gambit Accepted, Siberian Variation, Siberian Trap
- B21 Sicilian Defense: Smith-Morra Gambit Accepted, Sozin Formation
- B21 Sicilian Defense: Smith-Morra Gambit Accepted, Taimanov Formation
- B21 Sicilian Defense: Smith-Morra Gambit Declined, Alapin Formation
- B21 Sicilian Defense: Smith-Morra Gambit Declined, Center Formation
- B21 Sicilian Defense: Smith-Morra Gambit Declined, Dubois Variation
- B21 Sicilian Defense: Smith-Morra Gambit Declined, Push Variation
- B21 Sicilian Defense: Smith-Morra Gambit Declined, Scandinavian Formation
- B21 Sicilian Defense: Smith-Morra Gambit Declined, Wing Formation
- B22 Sicilian Defense: Alapin Variation
- B22 Sicilian Defense: Alapin Variation, Anti-Alapin Gambit
- B22 Sicilian Defense: Alapin Variation, Barmen Defense
- B22 Sicilian Defense: Alapin Variation, Barmen Defense, Central Exchange
- B22 Sicilian Defense: Alapin Variation, Barmen Defense, Endgame Variation
- B22 Sicilian Defense: Alapin Variation, Barmen Defense, Milner-Barry Attack
- B22 Sicilian Defense: Alapin Variation, Barmen Defense, Modern Line
- B22 Sicilian Defense: Alapin Variation, Smith-Morra Declined
- B22 Sicilian Defense: Alapin Variation, Stoltz Attack
- B22 Sicilian Defense: Alapin Variation, Stoltz Attack, Ivanchuk Line
- B22 Sicilian Defense: Delayed Alapin Variation
- B22 Sicilian Defense: Heidenfeld Variation
- B23 Sicilian Defense: Closed
- B23 Sicilian Defense: Closed
- B23 Sicilian Defense: Closed
- B23 Sicilian Defense: Closed, Carlsen Variation
- B23 Sicilian Defense: Closed, Chameleon Variation
- B23 Sicilian Defense: Closed, Grob Attack
- B23 Sicilian Defense: Closed, Korchnoi Defense
- B23 Sicilian Defense: Closed, Portland Attack
- B23 Sicilian Defense: Closed, Traditional
- B23 Sicilian Defense: Grand Prix Attack
- B23 Sicilian Defense: Grand Prix Attack, Schofman Variation
- B24 Sicilian Defense: Closed
- B24 Sicilian Defense: Closed
- B24 Sicilian Defense: Closed, Fianchetto Variation
- B24 Sicilian Defense: Closed, Smyslov Variation
- B25 Sicilian Defense: Closed
- B25 Sicilian Defense: Closed
- B25 Sicilian Defense: Closed, Botvinnik Defense, Edge Variation
- B25 Sicilian Defense: Closed, Botvinnik Defense, with f4
- B25 Sicilian Defense: Closed, Botvinnik Defense, with Nge2
- B26 Sicilian Defense: Closed
- B27 Modern Defense: Pterodactyl Variation
- B27 Pterodactyl Defense: Sicilian, Anhanguera
- B27 Pterodactyl Defense: Sicilian, Benoni Gambit
- B27 Pterodactyl Defense: Sicilian, Pteranodon
- B27 Pterodactyl Defense: Sicilian, Rhamphorhynchus
- B27 Pterodactyl Defense: Sicilian, Unpin
- B27 Pterodactyl Defense: Western, Pterodactyl
- B27 Pterodactyl Defense: Western, Rhamphorhynchus
- B27 Sicilian Defense
- B27 Sicilian Defense: Acton Extension
- B27 Sicilian Defense: Brussels Gambit
- B27 Sicilian Defense: Bücker Variation
- B27 Sicilian Defense: Double-Dutch Gambit
- B27 Sicilian Defense: Frederico Variation
- B27 Sicilian Defense: Hyperaccelerated Dragon
- B27 Sicilian Defense: Hyperaccelerated Dragon
- B27 Sicilian Defense: Hyperaccelerated Pterodactyl
- B27 Sicilian Defense: Hyperaccelerated Pterodactyl, Exchange Variation
- B27 Sicilian Defense: Jalalabad Variation
- B27 Sicilian Defense: Katalimov Variation
- B27 Sicilian Defense: Mongoose Variation
- B27 Sicilian Defense: Polish Gambit
- B27 Sicilian Defense: Quinteros Variation
- B28 Sicilian Defense: O'Kelly Variation
- B28 Sicilian Defense: O'Kelly Variation, Aronin System
- B28 Sicilian Defense: O'Kelly Variation, Kieseritzky System
- B28 Sicilian Defense: O'Kelly Variation, Maróczy Bind
- B28 Sicilian Defense: O'Kelly Variation, Maróczy Bind, Paulsen Line
- B28 Sicilian Defense: O'Kelly Variation, Maróczy Bind, Robatsch Line
- B28 Sicilian Defense: O'Kelly Variation, Normal System
- B28 Sicilian Defense: O'Kelly Variation, Normal System, Cortlever Gambit
- B28 Sicilian Defense: O'Kelly Variation, Normal System, Smith-Morra Line
- B28 Sicilian Defense: O'Kelly Variation, Normal System, Taimanov Line
- B28 Sicilian Defense: O'Kelly Variation, Normal System, Zagorovsky Line
- B28 Sicilian Defense: O'Kelly Variation, Quiet System
- B28 Sicilian Defense: O'Kelly Variation, Réti System
- B28 Sicilian Defense: O'Kelly Variation, Venice System
- B28 Sicilian Defense: O'Kelly Variation, Venice System, Barcza Line
- B28 Sicilian Defense: O'Kelly Variation, Venice System, Gambit Line
- B28 Sicilian Defense: O'Kelly Variation, Venice System, Ljubojevic Line
- B28 Sicilian Defense: O'Kelly Variation, Venice System, Steiner Line
- B28 Sicilian Defense: O'Kelly Variation, Wing Gambit
- B28 Sicilian Defense: O'Kelly Variation, Yerevan System
- B29 Sicilian Defense: Nimzowitsch Variation
- B29 Sicilian Defense: Nimzowitsch Variation, Advance Variation
- B29 Sicilian Defense: Nimzowitsch Variation, Closed Variation
- B29 Sicilian Defense: Nimzowitsch Variation, Exchange Variation
- B29 Sicilian Defense: Nimzowitsch Variation, Main Line
- B30 Sicilian Defense: Closed, Anti-Sveshnikov Variation
- B30 Sicilian Defense: Closed, Anti-Sveshnikov Variation, Kharlov-Kramnik Line
- B30 Sicilian Defense: Closed, Anti-Sveshnikov Variation, with d6
- B30 Sicilian Defense: Closed, Anti-Sveshnikov Variation, with Nf6
- B30 Sicilian Defense: Nyezhmetdinov-Rossolimo Attack
- B30 Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Brooklyn Retreat Defense
- B30 Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, San Francisco Gambit
- B30 Sicilian Defense: Old Sicilian
- B30 Sicilian Defense: Portsmouth Gambit
- B31 Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Fianchetto Variation
- B31 Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Fianchetto Variation, Gufeld Gambit
- B31 Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Fianchetto Variation, Lutikov Gambit
- B31 Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Fianchetto Variation, Totsky Attack
- B31 Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Gurgenidze Variation
- B32 Sicilian Defense: Accelerated Dragon
- B32 Sicilian Defense: Flohr Variation
- B32 Sicilian Defense: Franco-Sicilian Variation
- B32 Sicilian Defense: Godiva Variation
- B32 Sicilian Defense: Kalashnikov Variation
- B32 Sicilian Defense: Löwenthal Variation
- B32 Sicilian Defense: Nimzo-American Variation
- B32 Sicilian Defense: O'Kelly Variation, Maróczy Bind, Geller Line
- B32 Sicilian Defense: Open
- B32 Sicilian Defense: Open
- B32 Sicilian Defense: Open
- B33 Sicilian Defense: Lasker-Pelikan Variation
- B33 Sicilian Defense: Lasker-Pelikan Variation, Bird Variation
- B33 Sicilian Defense: Lasker-Pelikan Variation, Exchange Variation
- B33 Sicilian Defense: Lasker-Pelikan Variation, Retreat Variation
- B33 Sicilian Defense: Lasker-Pelikan Variation, Schlechter Variation
- B33 Sicilian Defense: Lasker-Pelikan Variation, Sveshnikov Variation
- B33 Sicilian Defense: Lasker-Pelikan Variation, Sveshnikov Variation
- B33 Sicilian Defense: Lasker-Pelikan Variation, Sveshnikov Variation, Chelyabinsk Variation
- B33 Sicilian Defense: Lasker-Pelikan Variation, Sveshnikov Variation, Novosibirsk Variation
- B33 Sicilian Defense: Lasker-Pelikan Variation, Sveshnikov Variation, Peresypkin's Sacrifice
- B33 Sicilian Defense: Open
- B34 Sicilian Defense: Accelerated Dragon, Exchange Variation
- B34 Sicilian Defense: Accelerated Dragon, Modern Variation
- B35 Sicilian Defense: Accelerated Dragon, Modern Bc4 Variation
- B35 Sicilian Defense: Dragon Variation, Modern Bc4 Variation
- B36 Sicilian Defense: Accelerated Dragon, Maróczy Bind
- B36 Sicilian Defense: Accelerated Dragon, Maróczy Bind, Gurgenidze Variation
- B37 Sicilian Defense: Accelerated Dragon, Maróczy Bind
- B37 Sicilian Defense: Accelerated Dragon, Simagin Variation
- B38 Sicilian Defense: Accelerated Dragon, Maróczy Bind
- B39 Sicilian Defense: Accelerated Dragon, Maróczy Bind, Breyer Variation
- B40 Sicilian Defense: Alapin Variation, Sherzer Variation
- B40 Sicilian Defense: Delayed Alapin Variation, with e6
- B40 Sicilian Defense: Drazic Variation
- B40 Sicilian Defense: French Variation
- B40 Sicilian Defense: French Variation, Normal
- B40 Sicilian Defense: French Variation, Open
- B40 Sicilian Defense: French Variation, Westerinen Attack
- B40 Sicilian Defense: Gaw-Paw Variation
- B40 Sicilian Defense: Kan Variation, Wing Attack, Fianchetto Variation
- B40 Sicilian Defense: Kramnik Variation
- B40 Sicilian Defense: Kveinis Variation
- B40 Sicilian Defense: Marshall Counterattack
- B40 Sicilian Defense: Paulsen-Basman Defense
- B40 Sicilian Defense: Pin Variation
- B40 Sicilian Defense: Pin Variation, Jaffe Variation
- B40 Sicilian Defense: Pin Variation, Koch Variation
- B40 Sicilian Defense: Smith-Morra Gambit Deferred
- B40 Sicilian Defense: Wing Gambit Deferred
- B41 Sicilian Defense: Kan Variation
- B41 Sicilian Defense: Kan Variation, Maróczy Bind, Bronstein Variation
- B41 Sicilian Defense: Kan Variation, Maróczy Bind, Bronstein Variation
- B41 Sicilian Defense: Kan Variation, Maróczy Bind, Hedgehog Variation
- B41 Sicilian Defense: Kan Variation, Maróczy Bind, Réti Variation
- B42 Sicilian Defense: Kan Variation, Gipslis Variation
- B42 Sicilian Defense: Kan Variation, Modern Variation
- B42 Sicilian Defense: Kan Variation, Polugaevsky Variation
- B42 Sicilian Defense: Kan Variation, Swiss Cheese Variation
- B43 Sicilian Defense: Kan Variation, Knight Variation
- B43 Sicilian Defense: Kan Variation, Wing Attack
- B43 Sicilian Defense: Kan Variation, Wing Attack, Christiansen's Dream
- B43 Sicilian Defense: Kan Variation, Wing Attack, Spraggett Attack
- B44 Sicilian Defense: Taimanov Variation
- B44 Sicilian Defense: Taimanov Variation, Gary Gambit
- B44 Sicilian Defense: Taimanov Variation, Modern Line
- B44 Sicilian Defense: Taimanov Variation, Szén Variation
- B45 Sicilian Defense: Four Knights Variation
- B45 Sicilian Defense: Four Knights Variation, American Attack
- B45 Sicilian Defense: Four Knights Variation, Cobra Variation
- B45 Sicilian Defense: Four Knights Variation, Exchange Variation
- B45 Sicilian Defense: Four Knights Variation, Sveshnikov Transfer
- B45 Sicilian Defense: Taimanov Variation
- B46 Sicilian Defense: Taimanov Variation
- B47 Sicilian Defense: Taimanov Variation, Bastrikov Variation
- B47 Sicilian Defense: Taimanov Variation, Bastrikov Variation, Ponomariov Gambit
- B48 Sicilian Defense: Taimanov Variation, Bastrikov Variation, English Attack
- B49 Sicilian Defense: Taimanov Variation, Bastrikov Variation
- B50 Sicilian Defense
- B50 Sicilian Defense
- B50 Sicilian Defense: Delayed Alapin Variation, Basman-Palatnik Double Gambit
- B50 Sicilian Defense: Delayed Alapin Variation, Basman-Palatnik Gambit
- B50 Sicilian Defense: Delayed Alapin Variation, with d6
- B50 Sicilian Defense: Kopec System
- B50 Sicilian Defense: Kotov Gambit
- B50 Sicilian Defense: Modern Variations
- B50 Sicilian Defense: Modern Variations, Anti-Qxd4 Move Order
- B50 Sicilian Defense: Modern Variations, Anti-Qxd4 Move Order Accepted
- B50 Sicilian Defense: Modern Variations, Tartakower
- B50 Sicilian Defense: Wing Gambit, Deferred Variation
- B51 Sicilian Defense: Moscow Variation
- B51 Sicilian Defense: Moscow Variation, Dorfman Gambit
- B51 Sicilian Defense: Moscow Variation, Moscow Gambit
- B52 Sicilian Defense: Moscow Variation, Haag Gambit
- B52 Sicilian Defense: Moscow Variation, Main Line
- B52 Sicilian Defense: Moscow Variation, Sokolsky Variation
- B53 Sicilian Defense: Chekhover Variation
- B53 Sicilian Defense: Chekhover Variation, Zaitsev Defense
- B54 Sicilian Defense: Dragon Variation, Accelerated Dragon
- B54 Sicilian Defense: Modern Variations, Ginsberg Gambit
- B54 Sicilian Defense: Modern Variations, Main Line
- B54 Sicilian Defense: Prins Variation
- B55 Sicilian Defense: Prins Variation, Venice Attack
- B56 Sicilian Defense: Classical Variation
- B56 Sicilian Defense: Classical Variation, Fianchetto Variation
- B56 Sicilian Defense: Kupreichik Variation
- B56 Sicilian Defense: Spielmann Variation
- B56 Sicilian Defense: Venice Attack
- B56 Sicilian Defense: Yates Variation
- B57 Sicilian Defense: Classical Variation, Anti-Sozin Variation
- B57 Sicilian Defense: Classical Variation, Sozin Attack
- B57 Sicilian Defense: Magnus Smith Trap
- B58 Sicilian Defense: Boleslavsky Variation
- B58 Sicilian Defense: Boleslavsky Variation, Louma Variation
- B58 Sicilian Defense: Classical Variation
- B58 Sicilian Defense: Classical Variation, Dragon Transfer
- B59 Sicilian Defense: Boleslavsky Variation
- B60 Sicilian Defense: Richter-Rauzer Variation
- B60 Sicilian Defense: Richter-Rauzer Variation, Dragon Variation
- B60 Sicilian Defense: Richter-Rauzer Variation, Modern Variation
- B61 Sicilian Defense: Richter-Rauzer Variation, Modern Variation
- B62 Sicilian Defense: Richter-Rauzer Variation
- B62 Sicilian Defense: Richter-Rauzer Variation
- B62 Sicilian Defense: Richter-Rauzer Variation, Exchange Variation
- B62 Sicilian Defense: Richter-Rauzer Variation, Podebrady Variation
- B62 Sicilian Defense: Richter-Rauzer Variation, Vitolins Variation
- B63 Sicilian Defense: Richter-Rauzer Variation, Classical Variation
- B63 Sicilian Defense: Richter-Rauzer Variation, Classical Variation, Kantscher Line
- B63 Sicilian Defense: Richter-Rauzer Variation, Ivanov Variation
- B63 Sicilian Defense: Richter-Rauzer Variation, Traditional Variation
- B64 Sicilian Defense: Richter-Rauzer Variation, Classical Variation
- B64 Sicilian Defense: Richter-Rauzer Variation, Classical Variation
- B65 Sicilian Defense: Richter-Rauzer Variation, Classical Variation
- B65 Sicilian Defense: Richter-Rauzer Variation, Rauzer Attack
- B66 Sicilian Defense: Richter-Rauzer Variation, Neo-Modern Variation, Early Deviations
- B67 Sicilian Defense: Richter-Rauzer Variation, Neo-Modern Variation
- B68 Sicilian Defense: Richter-Rauzer Variation, Neo-Modern Variation
- B69 Sicilian Defense: Richter-Rauzer Variation, Neo-Modern Variation, Nyezhmetdinov Attack
- B70 Sicilian Defense: Dragon Variation
- B70 Sicilian Defense: Dragon Variation, Classical Variation
- B70 Sicilian Defense: Dragon Variation, Fianchetto Variation
- B71 Sicilian Defense: Dragon Variation, Levenfish Variation
- B71 Sicilian Defense: Dragon Variation, Levenfish Variation, Main Line
- B72 Sicilian Defense: Dragon Variation
- B72 Sicilian Defense: Dragon Variation, Classical Variation
- B72 Sicilian Defense: Dragon Variation, Classical Variation
- B72 Sicilian Defense: Dragon Variation, Classical Variation
- B72 Sicilian Defense: Dragon Variation, Classical Variation, Amsterdam Variation
- B72 Sicilian Defense: Dragon Variation, Classical Variation, Grigoriev Variation
- B73 Sicilian Defense: Dragon Variation, Classical Variation
- B73 Sicilian Defense: Dragon Variation, Classical Variation, Battery Variation
- B73 Sicilian Defense: Dragon Variation, Classical Variation, Zollner Gambit
- B74 Sicilian Defense: Dragon Variation, Classical Variation, Alekhine Line
- B74 Sicilian Defense: Dragon Variation, Classical Variation, Bernard Defense
- B74 Sicilian Defense: Dragon Variation, Classical Variation, Maróczy Line
- B74 Sicilian Defense: Dragon Variation, Classical Variation, Normal Line
- B74 Sicilian Defense: Dragon Variation, Classical Variation, Spielmann Variation
- B74 Sicilian Defense: Dragon Variation, Classical Variation, Stockholm Attack
- B74 Sicilian Defense: Dragon Variation, Classical Variation, Tartakower Line
- B75 Sicilian Defense: Dragon Variation, Yugoslav Attack, Belezky Line
- B75 Sicilian Defense: Dragon Variation, Yugoslav Attack, Early Deviations
- B75 Sicilian Defense: Dragon Variation, Yugoslav Attack, Hungarian Dragon
- B76 Sicilian Defense: Dragon Variation, Yugoslav Attack
- B76 Sicilian Defense: Dragon Variation, Yugoslav Attack
- B76 Sicilian Defense: Dragon Variation, Yugoslav Attack, Modern Line
- B76 Sicilian Defense: Dragon Variation, Yugoslav Attack, Panov Variation
- B77 Sicilian Defense: Dragon Variation, Yugoslav Attack, Byrne Variation
- B77 Sicilian Defense: Dragon Variation, Yugoslav Attack, Czerniak Variation
- B77 Sicilian Defense: Dragon Variation, Yugoslav Attack, Czerniak Variation
- B77 Sicilian Defense: Dragon Variation, Yugoslav Attack, Main Line
- B77 Sicilian Defense: Dragon Variation, Yugoslav Attack, Main Line
- B77 Sicilian Defense: Dragon Variation, Yugoslav Attack, Main Line
- B77 Sicilian Defense: Dragon Variation, Yugoslav Attack, Sosonko Variation
- B78 Sicilian Defense: Dragon Variation, Yugoslav Attack
- B78 Sicilian Defense: Dragon Variation, Yugoslav Attack, Chinese Dragon
- B78 Sicilian Defense: Dragon Variation, Yugoslav Attack, Old Line
- B78 Sicilian Defense: Dragon Variation, Yugoslav Attack, Topalov Variation
- B79 Sicilian Defense: Dragon Variation, Yugoslav Attack
- B79 Sicilian Defense: Dragon Variation, Yugoslav Attack, Soltis Variation
- B80 Sicilian Defense: Scheveningen Variation
- B80 Sicilian Defense: Scheveningen Variation, English Attack, with Qd2
- B80 Sicilian Defense: Scheveningen Variation, Fianchetto Variation
- B80 Sicilian Defense: Scheveningen Variation, Vitolins Variation
- B81 Sicilian Defense: Scheveningen Variation, Keres Attack
- B82 Sicilian Defense: Scheveningen Variation, Matanovic Attack
- B82 Sicilian Defense: Scheveningen Variation, Tal Variation
- B83 Sicilian Defense: Scheveningen Variation, Classical Variation
- B83 Sicilian Defense: Scheveningen Variation, Modern Variation
- B83 Sicilian Defense: Scheveningen Variation, Modern Variation
- B83 Sicilian Defense: Scheveningen Variation, Modern Variation
- B84 Sicilian Defense: Najdorf Variation, Scheveningen Variation
- B84 Sicilian Defense: Scheveningen Variation, Classical Variation
- B84 Sicilian Defense: Scheveningen Variation, Classical Variation
- B85 Sicilian Defense: Scheveningen Variation, Classical Main Line
- B85 Sicilian Defense: Scheveningen Variation, Classical Variation, Paulsen Variation
- B85 Sicilian Defense: Scheveningen Variation, Classical Variation, Paulsen Variation
- B85 Sicilian Defense: Scheveningen Variation, Classical Variation, Paulsen Variation
- B86 Sicilian Defense: Sozin Attack
- B87 Sicilian Defense: Sozin Attack, Flank Variation
- B88 Sicilian Defense: Sozin Attack, Fischer Variation
- B88 Sicilian Defense: Sozin Attack, Leonhardt Variation
- B89 Sicilian Defense: Sozin Attack, Main Line
- B89 Sicilian Defense: Sozin Attack, Main Line, Sherbakov Variation
- B89 Sicilian Defense: Velimirovic Attack
- B90 Sicilian Defense: Najdorf Variation
- B90 Sicilian Defense: Najdorf Variation, Adams Attack
- B90 Sicilian Defense: Najdorf Variation, Dekker Gambit
- B90 Sicilian Defense: Najdorf Variation, English Attack
- B90 Sicilian Defense: Najdorf Variation, English Attack, Anti-English
- B90 Sicilian Defense: Najdorf Variation, Lipnitsky Attack
- B90 Sicilian Defense: Najdorf Variation, Petronić Attack
- B90 Sicilian Defense: Scheveningen Variation, Delayed Keres Attack
- B90 Sicilian Defense: Scheveningen Variation, Delayed Keres Attack, Perenyi Gambit
- B90 Sicilian Defense: Scheveningen Variation, English Attack, with f3
- B91 Sicilian Defense: Najdorf Variation, Zagreb Variation
- B92 Sicilian Defense: Najdorf Variation, Opocensky Variation
- B92 Sicilian Defense: Najdorf Variation, Opocensky Variation
- B92 Sicilian Defense: Najdorf Variation, Opocensky Variation, Modern Line
- B92 Sicilian Defense: Najdorf Variation, Opocensky Variation, Traditional Line
- B93 Sicilian Defense: Najdorf Variation, Amsterdam Variation
- B94 Sicilian Defense: Najdorf Variation
- B94 Sicilian Defense: Najdorf Variation, Ivkov Variation
- B95 Sicilian Defense: Najdorf Variation
- B96 Sicilian Defense: Najdorf Variation
- B96 Sicilian Defense: Najdorf Variation, Neo-Classical Defense
- B96 Sicilian Defense: Najdorf Variation, Polugaevsky Variation
- B96 Sicilian Defense: Najdorf Variation, Polugaevsky Variation, Simagin Line
- B97 Sicilian Defense: Najdorf Variation, Poisoned Pawn Accepted
- B97 Sicilian Defense: Najdorf Variation, Poisoned Pawn Variation
- B98 Sicilian Defense: Najdorf Variation
- B98 Sicilian Defense: Najdorf Variation, Browne Variation
- B98 Sicilian Defense: Najdorf Variation, Goteborg Variation
- B98 Sicilian Defense: Najdorf Variation, Traditional Line
- B99 Sicilian Defense: Najdorf Variation, Main Line
C — Open (1.e4 e5) (1239)
- C00 French Defense
- C00 French Defense
- C00 French Defense: Alapin Gambit
- C00 French Defense: Baeuerle Gambit
- C00 French Defense: Banzai-Leong Gambit
- C00 French Defense: Banzai-Leong Gambit, Pinova Gambit
- C00 French Defense: Bird Invitation
- C00 French Defense: Carlson Gambit
- C00 French Defense: Chigorin Variation
- C00 French Defense: Diemer-Duhm Gambit
- C00 French Defense: Diemer-Duhm Gambit Accepted
- C00 French Defense: Franco-Hiva Gambit
- C00 French Defense: Franco-Hiva Gambit Accepted
- C00 French Defense: Franco-Sicilian Defense
- C00 French Defense: Hoffmann Gambit
- C00 French Defense: Horwitz Attack
- C00 French Defense: Horwitz Attack, Papa-Ticulat Gambit
- C00 French Defense: King's Indian Attack
- C00 French Defense: King's Indian Attack, Franco-Hiva Gambit
- C00 French Defense: Knight Variation
- C00 French Defense: Knight Variation, Franco-Hiva Gambit
- C00 French Defense: La Bourdonnais Variation
- C00 French Defense: La Bourdonnais Variation, Reuter Gambit
- C00 French Defense: Mediterranean Defense
- C00 French Defense: Morphy Gambit
- C00 French Defense: Normal Variation
- C00 French Defense: Orthoschnapp Gambit
- C00 French Defense: Pelikan Variation
- C00 French Defense: Perseus Gambit
- C00 French Defense: Queen's Knight
- C00 French Defense: Réti-Spielmann Attack
- C00 French Defense: Reversed Philidor Formation
- C00 French Defense: Schlechter Variation
- C00 French Defense: St. George Defense
- C00 French Defense: St. George Defense, Sanky-George Gambit
- C00 French Defense: St. George Defense, St. George Gambit
- C00 French Defense: St. George Defense, Three Pawn Attack
- C00 French Defense: St. George Defense, Traditional Line
- C00 French Defense: Steiner Variation
- C00 French Defense: Steinitz Attack
- C00 French Defense: Two Knights Variation
- C00 French Defense: Wing Gambit
- C00 Rat Defense: Small Center Defense
- C01 French Defense: Exchange Variation
- C01 French Defense: Exchange Variation
- C01 French Defense: Exchange Variation
- C01 French Defense: Exchange Variation, Bogoljubow Variation
- C01 French Defense: Exchange Variation, Monte Carlo Variation
- C01 French Defense: Exchange Variation, Svenonius Variation
- C02 French Defense: Advance Variation
- C02 French Defense: Advance Variation
- C02 French Defense: Advance Variation
- C02 French Defense: Advance Variation
- C02 French Defense: Advance Variation, Euwe Variation
- C02 French Defense: Advance Variation, Extended Bishop Swap
- C02 French Defense: Advance Variation, Frenkel Gambit
- C02 French Defense: Advance Variation, Kupreichik Variation
- C02 French Defense: Advance Variation, Lputian Variation
- C02 French Defense: Advance Variation, Main Line
- C02 French Defense: Advance Variation, Milner-Barry Gambit
- C02 French Defense: Advance Variation, Milner-Barry Gambit, Hector Variation
- C02 French Defense: Advance Variation, Milner-Barry Gambit, Hector Variation
- C02 French Defense: Advance Variation, Milner-Barry Gambit, Main Line
- C02 French Defense: Advance Variation, Milner-Barry Gambit, Sørensen Variation
- C02 French Defense: Advance Variation, Nimzowitsch Attack
- C02 French Defense: Advance Variation, Nimzowitsch Gambit
- C02 French Defense: Advance Variation, Nimzowitsch System
- C02 French Defense: Advance Variation, Paulsen Attack
- C02 French Defense: Advance Variation, Ruisdonk Gambit
- C02 French Defense: Advance Variation, Steinitz Variation
- C02 French Defense: Advance Variation, Wade Variation
- C03 French Defense: Tarrasch Variation
- C03 French Defense: Tarrasch Variation, Guimard Defense
- C03 French Defense: Tarrasch Variation, Guimard Defense, Thunderbunny Variation
- C03 French Defense: Tarrasch Variation, Haberditz Variation
- C03 French Defense: Tarrasch Variation, Modern System
- C03 French Defense: Tarrasch Variation, Morozevich Variation
- C04 French Defense: Tarrasch Variation, Guimard Defense, Main Line
- C05 French Defense: Tarrasch Variation, Botvinnik Variation
- C05 French Defense: Tarrasch Variation, Closed Variation
- C05 French Defense: Tarrasch Variation, Closed Variation
- C05 French Defense: Tarrasch Variation, Pawn Center Variation
- C06 French Defense: Tarrasch Variation, Closed Variation, Main Line
- C06 French Defense: Tarrasch Variation, Leningrad Variation
- C07 French Defense: Tarrasch Variation, Chistyakov Defense
- C07 French Defense: Tarrasch Variation, Chistyakov Defense, Modern Line
- C07 French Defense: Tarrasch Variation, Eliskases Variation
- C07 French Defense: Tarrasch Variation, Open System
- C07 French Defense: Tarrasch Variation, Open System, Euwe-Keres Line
- C07 French Defense: Tarrasch Variation, Open System, Shaposhnikov Gambit
- C07 French Defense: Tarrasch Variation, Open System, Süchting Line
- C08 French Defense: Tarrasch Variation, Open System
- C08 French Defense: Tarrasch Variation, Open System, Advance Line
- C09 French Defense: Tarrasch Variation, Open System, Main Line
- C10 French Defense: Hecht-Reefschläger Variation
- C10 French Defense: Marshall Gambit
- C10 French Defense: Paulsen Variation
- C10 French Defense: Rubinstein Variation
- C10 French Defense: Rubinstein Variation, Blackburne Defense
- C10 French Defense: Rubinstein Variation, Capablanca Line
- C10 French Defense: Rubinstein Variation, Ellis Gambit
- C10 French Defense: Rubinstein Variation, Fort Knox Variation
- C10 French Defense: Rubinstein Variation, Kasparov Attack
- C10 French Defense: Rubinstein Variation, Maric Variation
- C11 French Defense: Classical Variation
- C11 French Defense: Classical Variation
- C11 French Defense: Classical Variation, Burn Variation
- C11 French Defense: Classical Variation, Burn Variation, Main Line
- C11 French Defense: Classical Variation, Burn Variation, Morozevich Line
- C11 French Defense: Classical Variation, Delayed Exchange Variation
- C11 French Defense: Classical Variation, Shirov-Anand Variation
- C11 French Defense: Classical Variation, Steinitz Variation
- C11 French Defense: Classical Variation, Swiss Variation
- C11 French Defense: Henneberger Variation
- C11 French Defense: Steinitz Variation
- C11 French Defense: Steinitz Variation
- C11 French Defense: Steinitz Variation
- C11 French Defense: Steinitz Variation
- C11 French Defense: Steinitz Variation
- C11 French Defense: Steinitz Variation, Boleslavsky Variation
- C11 French Defense: Steinitz Variation, Bradford Attack Variation
- C11 French Defense: Steinitz Variation, Brodsky-Jones Variation
- C11 French Defense: Steinitz Variation, Gledhill Attack
- C12 French Defense: McCutcheon Variation
- C12 French Defense: McCutcheon Variation, Advance Variation
- C12 French Defense: McCutcheon Variation, Bernstein Variation
- C12 French Defense: McCutcheon Variation, Bogoljubow Variation
- C12 French Defense: McCutcheon Variation, Chigorin Variation
- C12 French Defense: McCutcheon Variation, Dr. Olland Variation
- C12 French Defense: McCutcheon Variation, Duras Variation
- C12 French Defense: McCutcheon Variation, Exchange Variation
- C12 French Defense: McCutcheon Variation, Grigoriev Variation
- C12 French Defense: McCutcheon Variation, Janowski Variation
- C12 French Defense: McCutcheon Variation, Lasker Variation
- C12 French Defense: McCutcheon Variation, Lasker Variation
- C12 French Defense: McCutcheon Variation, Tartakower Variation
- C13 French Defense: Alekhine-Chatard Attack
- C13 French Defense: Alekhine-Chatard Attack, Albin-Chatard Gambit
- C13 French Defense: Alekhine-Chatard Attack, Breyer Variation
- C13 French Defense: Alekhine-Chatard Attack, Maróczy Variation
- C13 French Defense: Alekhine-Chatard Attack, Spielmann Variation
- C13 French Defense: Alekhine-Chatard Attack, Teichmann Variation
- C13 French Defense: Classical Variation
- C13 French Defense: Classical Variation, Frankfurt Variation
- C13 French Defense: Classical Variation, Normal Variation
- C13 French Defense: Classical Variation, Richter Attack
- C13 French Defense: Classical Variation, Richter Attack
- C13 French Defense: Classical Variation, Tartakower Variation
- C13 French Defense: Classical Variation, Vistaneckis Variation
- C14 French Defense: Classical Variation
- C14 French Defense: Classical Variation
- C14 French Defense: Classical Variation, Alapin Variation
- C14 French Defense: Classical Variation, Pollock Variation
- C14 French Defense: Classical Variation, Rubinstein Variation
- C14 French Defense: Classical Variation, Stahlberg Variation
- C14 French Defense: Classical Variation, Steinitz Variation
- C14 French Defense: Classical Variation, Tarrasch Variation
- C15 French Defense: McCutcheon Variation, Wolf Gambit
- C15 French Defense: Winawer Variation
- C15 French Defense: Winawer Variation, Alekhine Gambit Accepted
- C15 French Defense: Winawer Variation, Alekhine Gambit, Alatortsev Variation
- C15 French Defense: Winawer Variation, Alekhine Gambit, Kan Variation
- C15 French Defense: Winawer Variation, Alekhine-Maróczy Gambit
- C15 French Defense: Winawer Variation, Delayed Exchange Variation
- C15 French Defense: Winawer Variation, Exchange Variation, Canal Attack
- C15 French Defense: Winawer Variation, Fingerslip Variation
- C15 French Defense: Winawer Variation, Fingerslip Variation, Kunin Double Gambit
- C15 French Defense: Winawer Variation, Fingerslip Variation, Main Line
- C15 French Defense: Winawer Variation, Fingerslip Variation, Schwarz's Line
- C15 French Defense: Winawer Variation, Kondratiyev Variation
- C15 French Defense: Winawer Variation, Winckelmann-Reimer Gambit
- C16 French Defense: Winawer Variation, Advance Variation
- C16 French Defense: Winawer Variation, Petrosian Variation
- C17 French Defense: Winawer Variation, Advance Variation
- C17 French Defense: Winawer Variation, Advance Variation
- C17 French Defense: Winawer Variation, Advance Variation
- C17 French Defense: Winawer Variation, Advance Variation, Moscow Variation
- C17 French Defense: Winawer Variation, Bogoljubow Variation
- C17 French Defense: Winawer Variation, Bogoljubow Variation, Icelandic Defense
- C17 French Defense: Winawer Variation, Maróczy-Wallis Variation
- C17 French Defense: Winawer Variation, Retreat Variation
- C17 French Defense: Winawer Variation, Retreat Variation, Armenian Line
- C18 French Defense: Winawer Variation, Advance Variation
- C18 French Defense: Winawer Variation, Advance Variation
- C18 French Defense: Winawer Variation, Advance Variation, with Bd3
- C18 French Defense: Winawer Variation, Advance Variation, with Bd3
- C18 French Defense: Winawer Variation, Advance Variation, with h4
- C18 French Defense: Winawer Variation, Advance Variation, with h4
- C18 French Defense: Winawer Variation, Classical Variation
- C18 French Defense: Winawer Variation, Eingorn Variation
- C18 French Defense: Winawer Variation, Poisoned Pawn Variation
- C18 French Defense: Winawer Variation, Poisoned Pawn Variation
- C18 French Defense: Winawer Variation, Poisoned Pawn Variation
- C18 French Defense: Winawer Variation, Poisoned Pawn Variation Declined
- C18 French Defense: Winawer Variation, Poisoned Pawn Variation, Main Line
- C18 French Defense: Winawer Variation, Poisoned Pawn Variation, Paoli Variation
- C18 French Defense: Winawer Variation, Portisch-Hook Variation
- C18 French Defense: Winawer Variation, Warsaw Variation
- C19 French Defense: Winawer Variation, Advance Variation, Smyslov Variation
- C19 French Defense: Winawer Variation, Advance Variation, Smyslov Variation
- C19 French Defense: Winawer Variation, Positional Variation
- C19 French Defense: Winawer Variation, Positional Variation
- C19 French Defense: Winawer Variation, Positional Variation
- C19 French Defense: Winawer Variation, Positional Variation
- C19 French Defense: Winawer Variation, Positional Variation
- C19 French Defense: Winawer Variation, Positional Variation
- C19 French Defense: Winawer Variation, Positional Variation
- C19 French Defense: Winawer Variation, Positional Variation
- C19 French Defense: Winawer Variation, Positional Variation
- C19 French Defense: Winawer Variation, Positional Variation
- C19 French Defense: Winawer Variation, Positional Variation
- C19 French Defense: Winawer Variation, Positional Variation
- C20 Barnes Opening: Walkerling
- C20 Bongcloud Attack
- C20 Center Game
- C20 English Opening: The Whale
- C20 King's Pawn Game
- C20 King's Pawn Game: Alapin Opening
- C20 King's Pawn Game: Bavarian Gambit
- C20 King's Pawn Game: Beyer Gambit
- C20 King's Pawn Game: Clam Variation, King's Gambit Reversed
- C20 King's Pawn Game: Clam Variation, Radisch Gambit
- C20 King's Pawn Game: King's Head Opening
- C20 King's Pawn Game: King's Head Opening
- C20 King's Pawn Game: Leonardis Variation
- C20 King's Pawn Game: MacLeod Attack
- C20 King's Pawn Game: MacLeod Attack, Lasa Gambit
- C20 King's Pawn Game: MacLeod Attack, Norwalde Gambit
- C20 King's Pawn Game: Mengarini's Opening
- C20 King's Pawn Game: Napoleon Attack
- C20 King's Pawn Game: Philidor Gambit
- C20 King's Pawn Game: Tortoise Opening
- C20 King's Pawn Game: Wayward Queen Attack
- C20 King's Pawn Game: Wayward Queen Attack, Kiddie Countergambit
- C20 King's Pawn Game: Wayward Queen Attack, Mellon Gambit
- C20 King's Pawn Game: Weber Gambit
- C20 King's Pawn Opening
- C20 King's Pawn Opening: Speers
- C20 King's Pawn Opening: Van Hooydoon Gambit
- C20 Portuguese Opening
- C20 Portuguese Opening: Miguel Gambit
- C20 Portuguese Opening: Portuguese Gambit
- C21 Center Game
- C21 Center Game Accepted
- C21 Center Game: Halasz-McDonnell Gambit
- C21 Center Game: Halasz-McDonnell Gambit, Crocodile Variation
- C21 Center Game: Kieseritzky Variation
- C21 Center Game: Kieseritzky Variation
- C21 Center Game: Kieseritzky Variation
- C21 Center Game: Lanc-Arnold Gambit
- C21 Center Game: Lanc-Arnold Gambit, Schippler Gambit
- C21 Center Game: Ross Gambit
- C21 Center Game: von der Lasa Gambit
- C21 Danish Gambit
- C21 Danish Gambit Accepted
- C21 Danish Gambit Accepted: Chigorin Defense
- C21 Danish Gambit Accepted: Classical Defense
- C21 Danish Gambit Accepted: Copenhagen Defense
- C21 Danish Gambit Accepted: Schlechter Defense
- C21 Danish Gambit Accepted: Svenonius Defense
- C21 Danish Gambit Declined: Sörensen Defense
- C22 Center Game: Berger Variation
- C22 Center Game: Charousek Variation
- C22 Center Game: Hall Variation
- C22 Center Game: Kupreichik Variation
- C22 Center Game: l'Hermet Variation
- C22 Center Game: Normal Variation
- C22 Center Game: Paulsen Attack Variation
- C23 Bishop's Opening
- C23 Bishop's Opening: Anderssen Gambit
- C23 Bishop's Opening: Boi Variation
- C23 Bishop's Opening: Calabrese Countergambit
- C23 Bishop's Opening: Calabrese Countergambit, Jaenisch Variation
- C23 Bishop's Opening: del Rio Variation
- C23 Bishop's Opening: Four Pawns Gambit
- C23 Bishop's Opening: Khan Gambit
- C23 Bishop's Opening: Lewis Countergambit
- C23 Bishop's Opening: Lewis Countergambit
- C23 Bishop's Opening: Lewis Countergambit, Walker Variation
- C23 Bishop's Opening: Lewis Gambit
- C23 Bishop's Opening: Lisitsyn Variation
- C23 Bishop's Opening: Lopez Gambit
- C23 Bishop's Opening: Lopez Variation
- C23 Bishop's Opening: Lopez Variation, Lopez Gambit
- C23 Bishop's Opening: McDonnell Gambit
- C23 Bishop's Opening: McDonnell Gambit, La Bourdonnais-Denker Gambit
- C23 Bishop's Opening: McDonnell Gambit, McDonnell Double Gambit
- C23 Bishop's Opening: Philidor Counterattack
- C23 Bishop's Opening: Philidor Variation
- C23 Bishop's Opening: Pratt Variation
- C23 Bishop's Opening: Stein Gambit
- C23 Bishop's Opening: Thorold Gambit
- C24 Bishop's Opening: Berlin Defense
- C24 Bishop's Opening: Berlin Defense, Greco Gambit
- C24 Bishop's Opening: Kitchener Folly
- C24 Bishop's Opening: Krejcik Gambit
- C24 Bishop's Opening: Pachman Gambit
- C24 Bishop's Opening: Paulsen Defense
- C24 Bishop's Opening: Ponziani Gambit
- C24 Bishop's Opening: Urusov Gambit, Panov Variation
- C24 Bishop's Opening: Vienna Hybrid
- C24 Bishop's Opening: Warsaw Gambit
- C25 Vienna Gambit, with Max Lange Defense
- C25 Vienna Gambit, with Max Lange Defense: Cunningham Defense
- C25 Vienna Gambit, with Max Lange Defense: Hamppe-Allgaier Gambit
- C25 Vienna Gambit, with Max Lange Defense: Hamppe-Allgaier Gambit, Alapin Variation
- C25 Vienna Gambit, with Max Lange Defense: Hamppe-Allgaier Gambit, Thorold Variation
- C25 Vienna Gambit, with Max Lange Defense: Hamppe-Muzio Gambit
- C25 Vienna Gambit, with Max Lange Defense: Knight Variation
- C25 Vienna Gambit, with Max Lange Defense: Pierce Gambit
- C25 Vienna Gambit, with Max Lange Defense: Quelle Gambit
- C25 Vienna Gambit, with Max Lange Defense: Steinitz Gambit
- C25 Vienna Gambit, with Max Lange Defense: Steinitz Gambit, Fraser-Minckwitz Defense
- C25 Vienna Gambit, with Max Lange Defense: Steinitz Gambit, Main Line
- C25 Vienna Gambit, with Max Lange Defense: Steinitz Gambit, Paulsen Defense
- C25 Vienna Gambit, with Max Lange Defense: Steinitz Gambit, Sörensen Defense
- C25 Vienna Gambit, with Max Lange Defense: Steinitz Gambit, Zukertort Defense
- C25 Vienna Game
- C25 Vienna Game: Anderssen Defense
- C25 Vienna Game: Fyfe Gambit
- C25 Vienna Game: Giraffe Attack
- C25 Vienna Game: Hamppe-Meitner Variation
- C25 Vienna Game: Hamppe-Muzio Gambit
- C25 Vienna Game: Hamppe-Muzio, Dubois Variation
- C25 Vienna Game: Max Lange Defense
- C25 Vienna Game: Omaha Gambit
- C25 Vienna Game: Paulsen Variation
- C25 Vienna Game: Paulsen Variation
- C25 Vienna Game: Paulsen Variation, Mariotti Gambit
- C25 Vienna Game: Philidor Countergambit
- C25 Vienna Game: Pierce Gambit, Rushmere Attack
- C25 Vienna Game: Stanley Variation, Meitner-Mieses Gambit
- C25 Vienna Game: Zhuravlev Countergambit
- C26 Bishop's Opening: Horwitz Gambit
- C26 Bishop's Opening: Vienna Hybrid, Spielmann Attack
- C26 Vienna Game: Falkbeer Variation
- C26 Vienna Game: Mengarini Variation
- C26 Vienna Game: Mieses Variation
- C26 Vienna Game: Mieses Variation, Erben Gambit
- C26 Vienna Game: Paulsen Variation, Pollock Gambit
- C26 Vienna Game: Stanley Variation
- C26 Vienna Game: Stanley Variation, Eifel Gambit
- C26 Vienna Game: Stanley Variation, Reversed Spanish
- C27 Bishop's Opening: Boden-Kieseritzky Gambit
- C27 Bishop's Opening: Boden-Kieseritzky Gambit, Lichtenhein Defense
- C27 Vienna Game: Adams' Gambit
- C27 Vienna Game: Frankenstein-Dracula Variation
- C27 Vienna Game: Stanley Variation, Alekhine Variation
- C27 Vienna Game: Stanley Variation, Frankenstein-Dracula Variation
- C27 Vienna Game: Stanley Variation, Monster Declined
- C28 Bishop's Opening: Vienna Hybrid, Hromádka Variation
- C28 Vienna Game: Stanley Variation, Bronstein Gambit
- C28 Vienna Game: Stanley Variation, Three Knights Variation
- C29 Vienna Game: Heyde Variation
- C29 Vienna Game: Vienna Gambit
- C29 Vienna Game: Vienna Gambit, Bardeleben Variation
- C29 Vienna Game: Vienna Gambit, Breyer Variation
- C29 Vienna Game: Vienna Gambit, Kaufmann Variation
- C29 Vienna Game: Vienna Gambit, Main Line
- C29 Vienna Game: Vienna Gambit, Modern Variation
- C29 Vienna Game: Vienna Gambit, Paulsen Attack
- C29 Vienna Game: Vienna Gambit, Steinitz Variation
- C29 Vienna Game: Vienna Gambit, Wurzburger Trap
- C30 King's Gambit
- C30 King's Gambit Declined: Classical Variation
- C30 King's Gambit Declined: Classical Variation
- C30 King's Gambit Declined: Classical Variation, Euwe Attack
- C30 King's Gambit Declined: Classical Variation, Rotlewi Countergambit
- C30 King's Gambit Declined: Classical Variation, Rubinstein Countergambit
- C30 King's Gambit Declined: Classical Variation, Walthoffen Attack
- C30 King's Gambit Declined: Classical, Hanham Variation
- C30 King's Gambit Declined: Classical, Réti Variation
- C30 King's Gambit Declined: Classical, Soldatenkov Variation
- C30 King's Gambit Declined: Classical, Svenonius Variation
- C30 King's Gambit Declined: Hobbs-Zilbermints Gambit
- C30 King's Gambit Declined: Keene Defense
- C30 King's Gambit Declined: Keene's Defense
- C30 King's Gambit Declined: Keene's Defense
- C30 King's Gambit Declined: Mafia Defense
- C30 King's Gambit Declined: Miles Defense
- C30 King's Gambit Declined: Norwalde Variation
- C30 King's Gambit Declined: Norwalde Variation, Bücker Gambit
- C30 King's Gambit Declined: Norwalde Variation, Schubert Variation
- C30 King's Gambit Declined: Panteldakis Countergambit
- C30 King's Gambit Declined: Panteldakis Countergambit, Greco Variation
- C30 King's Gambit Declined: Panteldakis Countergambit, Pawn Sacrifice Line
- C30 King's Gambit Declined: Panteldakis Countergambit, Schiller's Defense
- C30 King's Gambit Declined: Panteldakis Countergambit, Shirazi Line
- C30 King's Gambit Declined: Panteldakis Countergambit, Symmetrical Variation
- C30 King's Gambit Declined: Petrov's Defense
- C30 King's Gambit Declined: Queen's Knight Defense
- C30 King's Gambit Declined: Senechaud Countergambit
- C30 King's Gambit Declined: Soller-Zilbermints Gambit
- C30 King's Gambit Declined: Zilbermints Double Countergambit
- C30 King's Gambit Declined: Zilbermints Double Gambit
- C31 King's Gambit Declined: Falkbeer Countergambit
- C31 King's Gambit Declined: Falkbeer Countergambit Accepted
- C31 King's Gambit Declined: Falkbeer Countergambit, Anderssen Attack
- C31 King's Gambit Declined: Falkbeer Countergambit, Blackburne Attack
- C31 King's Gambit Declined: Falkbeer Countergambit, Charousek Gambit
- C31 King's Gambit Declined: Falkbeer Countergambit, Charousek Gambit, Morphy Defense
- C31 King's Gambit Declined: Falkbeer Countergambit, Hinrichsen Gambit
- C31 King's Gambit Declined: Falkbeer Countergambit, Miles Gambit
- C31 King's Gambit Declined: Falkbeer Countergambit, Milner-Barry Variation
- C31 King's Gambit Declined: Falkbeer Countergambit, Modern Transfer
- C31 King's Gambit Declined: Falkbeer Countergambit, Nimzowitsch-Marshall Countergambit
- C31 King's Gambit Declined: Falkbeer Countergambit, Pickler Gambit
- C31 King's Gambit Declined: Falkbeer Countergambit, Rubinstein Variation
- C31 King's Gambit Declined: Falkbeer Countergambit, Staunton Line
- C31 Van Geet Opening: Grünfeld Defense, Steiner Gambit
- C32 King's Gambit Declined: Falkbeer Countergambit, Alapin Variation
- C32 King's Gambit Declined: Falkbeer Countergambit, Charousek Gambit
- C32 King's Gambit Declined: Falkbeer Countergambit, Charousek Gambit Accepted
- C32 King's Gambit Declined: Falkbeer Countergambit, Charousek Gambit, Keres Variation
- C32 King's Gambit Declined: Falkbeer Countergambit, Charousek Gambit, Main Line
- C32 King's Gambit Declined: Falkbeer Countergambit, Charousek Gambit, Old Line
- C32 King's Gambit Declined: Falkbeer Countergambit, Charousek Variation
- C32 King's Gambit Declined: Falkbeer Countergambit, Tarrasch Variation
- C33 King's Gambit Accepted
- C33 King's Gambit Accepted: Basman Gambit
- C33 King's Gambit Accepted: Bishop's Gambit
- C33 King's Gambit Accepted: Bishop's Gambit, Anderssen Defense
- C33 King's Gambit Accepted: Bishop's Gambit, Anderssen Variation
- C33 King's Gambit Accepted: Bishop's Gambit, Bledow Countergambit
- C33 King's Gambit Accepted: Bishop's Gambit, Bledow Variation
- C33 King's Gambit Accepted: Bishop's Gambit, Boden Variation
- C33 King's Gambit Accepted: Bishop's Gambit, Bogoljubow Defense
- C33 King's Gambit Accepted: Bishop's Gambit, Bogoljubow Variation
- C33 King's Gambit Accepted: Bishop's Gambit, Boren-Svenonius Variation
- C33 King's Gambit Accepted: Bishop's Gambit, Bryan Countergambit
- C33 King's Gambit Accepted: Bishop's Gambit, Chigorin's Attack
- C33 King's Gambit Accepted: Bishop's Gambit, Classical Defense
- C33 King's Gambit Accepted: Bishop's Gambit, Classical Defense, Cozio Attack
- C33 King's Gambit Accepted: Bishop's Gambit, Cozio Defense
- C33 King's Gambit Accepted: Bishop's Gambit, Cozio Variation
- C33 King's Gambit Accepted: Bishop's Gambit, First Jaenisch Variation
- C33 King's Gambit Accepted: Bishop's Gambit, Fraser Variation
- C33 King's Gambit Accepted: Bishop's Gambit, Gianutio Gambit
- C33 King's Gambit Accepted: Bishop's Gambit, Greco Variation
- C33 King's Gambit Accepted: Bishop's Gambit, Grimm Attack
- C33 King's Gambit Accepted: Bishop's Gambit, Kieseritzky Gambit
- C33 King's Gambit Accepted: Bishop's Gambit, Lopez Defense
- C33 King's Gambit Accepted: Bishop's Gambit, Lopez Variation
- C33 King's Gambit Accepted: Bishop's Gambit, Maurian Defense
- C33 King's Gambit Accepted: Bishop's Gambit, McDonnell Attack
- C33 King's Gambit Accepted: Bishop's Gambit, McDonnell Attack
- C33 King's Gambit Accepted: Bishop's Gambit, Paulsen Attack
- C33 King's Gambit Accepted: Bishop's Gambit, Steinitz Defense
- C33 King's Gambit Accepted: Breyer Gambit
- C33 King's Gambit Accepted: Carrera Gambit
- C33 King's Gambit Accepted: Dodo Variation
- C33 King's Gambit Accepted: Eisenberg Variation
- C33 King's Gambit Accepted: Gaga Gambit
- C33 King's Gambit Accepted: Lopez-Gianutio Countergambit, Hein Variation
- C33 King's Gambit Accepted: Mason-Keres Gambit
- C33 King's Gambit Accepted: Orsini Gambit
- C33 King's Gambit Accepted: Paris Gambit
- C33 King's Gambit Accepted: Schurig Gambit, with Bb5
- C33 King's Gambit Accepted: Schurig Gambit, with Bd3
- C33 King's Gambit Accepted: Stamma Gambit
- C33 King's Gambit Accepted: Tartakower Gambit
- C33 King's Gambit Accepted: Tartakower Gambit, Weiss Defense
- C33 King's Gambit Accepted: Tumbleweed
- C33 King's Gambit Accepted: Villemson Gambit
- C34 King's Gambit Accepted: Becker Defense
- C34 King's Gambit Accepted: Bonsch-Osmolovsky Variation
- C34 King's Gambit Accepted: Fischer Defense
- C34 King's Gambit Accepted: Fischer Defense, Schulder Gambit
- C34 King's Gambit Accepted: Fischer Defense, Spanish Variation
- C34 King's Gambit Accepted: Gianutio Countergambit
- C34 King's Gambit Accepted: Greco Gambit
- C34 King's Gambit Accepted: King's Knight's Gambit
- C34 King's Gambit Accepted: King's Knight's Gambit
- C34 King's Gambit Accepted: MacLeod Defense
- C34 King's Gambit Accepted: Schallopp Defense
- C34 King's Gambit Accepted: Schallopp Defense, Tashkent Attack
- C34 King's Gambit Accepted: Wagenbach Defense
- C35 King's Gambit Accepted: Cunningham Defense
- C35 King's Gambit Accepted: Cunningham Defense, Bertin Gambit
- C35 King's Gambit Accepted: Cunningham Defense, Bertin Gambit
- C35 King's Gambit Accepted: Cunningham Defense, McCormick Defense
- C36 King's Gambit Accepted: Abbazia Defense
- C36 King's Gambit Accepted: Abbazia Defense, Main Line
- C36 King's Gambit Accepted: Modern Defense
- C36 King's Gambit Accepted: Modern Defense
- C37 King's Gambit Accepted: Australian Gambit
- C37 King's Gambit Accepted: Blachly Gambit
- C37 King's Gambit Accepted: Double Muzio Gambit
- C37 King's Gambit Accepted: Double Muzio Gambit, Baldwin Gambit
- C37 King's Gambit Accepted: Double Muzio Gambit, Bello Gambit
- C37 King's Gambit Accepted: Double Muzio Gambit, Paulsen Defense
- C37 King's Gambit Accepted: Double Muzio Gambit, Young Gambit
- C37 King's Gambit Accepted: Ghulam-Kassim Gambit
- C37 King's Gambit Accepted: Ghulam-Kassim Gambit
- C37 King's Gambit Accepted: King's Knight's Gambit
- C37 King's Gambit Accepted: Kotov Gambit
- C37 King's Gambit Accepted: Lolli Gambit
- C37 King's Gambit Accepted: Lolli Gambit, Young Variation
- C37 King's Gambit Accepted: McDonnell Gambit
- C37 King's Gambit Accepted: Middleton Countergambit
- C37 King's Gambit Accepted: Muzio Gambit Accepted, From's Defense
- C37 King's Gambit Accepted: Muzio Gambit, Brentano Defense
- C37 King's Gambit Accepted: Muzio Gambit, Holloway Defense
- C37 King's Gambit Accepted: Muzio Gambit, Kling and Horwitz Counterattack
- C37 King's Gambit Accepted: Muzio Gambit, Sarratt Defense
- C37 King's Gambit Accepted: Muzio Gambit, Wild Muzio Gambit
- C37 King's Gambit Accepted: Quaade Gambit
- C37 King's Gambit Accepted: Rosentreter Gambit
- C37 King's Gambit Accepted: Rosentreter Gambit, Bird Gambit
- C37 King's Gambit Accepted: Rosentreter Gambit, Sörensen Gambit
- C37 King's Gambit Accepted: Rosentreter Gambit, Testa Variation
- C37 King's Gambit Accepted: Salvio Gambit
- C37 King's Gambit Accepted: Salvio Gambit, Anderssen Counterattack
- C37 King's Gambit Accepted: Salvio Gambit, Cochrane Gambit
- C37 King's Gambit Accepted: Salvio Gambit, Santa Maria Defense
- C37 King's Gambit Accepted: Salvio Gambit, Silberschmidt Defense
- C37 King's Gambit Accepted: Salvio Gambit, Viennese Variation
- C37 King's Gambit Accepted: Silberschmidt Gambit
- C37 King's Gambit Accepted: Sörensen Gambit
- C38 King's Gambit Accepted: Greco Gambit
- C38 King's Gambit Accepted: Hanstein Gambit
- C38 King's Gambit Accepted: Mayet Gambit
- C38 King's Gambit Accepted: Philidor Gambit
- C38 King's Gambit Accepted: Philidor Gambit, Schultz Variation
- C38 King's Gambit Accepted: Traditional Variation
- C39 King's Gambit Accepted: Allgaier Gambit
- C39 King's Gambit Accepted: Allgaier Gambit, Thorold Attack
- C39 King's Gambit Accepted: Allgaier Gambit, Urusov Attack
- C39 King's Gambit Accepted: Allgaier, Blackburne Gambit
- C39 King's Gambit Accepted: Allgaier, Cook Variation
- C39 King's Gambit Accepted: Allgaier, Horny Defense
- C39 King's Gambit Accepted: Allgaier, Schlechter Defense
- C39 King's Gambit Accepted: Allgaier, Urusov Attack
- C39 King's Gambit Accepted: Kieseritzky Gambit
- C39 King's Gambit Accepted: Kieseritzky Gambit, Anderssen Defense
- C39 King's Gambit Accepted: Kieseritzky Gambit, Anderssen-Cordel Gambit
- C39 King's Gambit Accepted: Kieseritzky Gambit, Berlin Defense
- C39 King's Gambit Accepted: Kieseritzky Gambit, Berlin Defense, de Riviere Variation
- C39 King's Gambit Accepted: Kieseritzky Gambit, Berlin Defense, Rubinstein Variation
- C39 King's Gambit Accepted: Kieseritzky Gambit, Brentano Defense
- C39 King's Gambit Accepted: Kieseritzky Gambit, Brentano Defense
- C39 King's Gambit Accepted: Kieseritzky Gambit, Brentano Defense, Caro Variation
- C39 King's Gambit Accepted: Kieseritzky Gambit, Cotter Gambit
- C39 King's Gambit Accepted: Kieseritzky Gambit, Kolisch Defense
- C39 King's Gambit Accepted: Kieseritzky Gambit, Long Whip
- C39 King's Gambit Accepted: Kieseritzky Gambit, Neumann Defense
- C39 King's Gambit Accepted: Kieseritzky Gambit, Paulsen Defense
- C39 King's Gambit Accepted: Kieseritzky Gambit, Paulsen Defense Deferred
- C39 King's Gambit Accepted: Kieseritzky Gambit, Rice Gambit
- C39 King's Gambit Accepted: Kieseritzky Gambit, Rosenthal Defense
- C39 King's Gambit Accepted: Kieseritzky, Long Whip Defense, Jaenisch Variation
- C39 King's Gambit Accepted: Kieseritzky, Polerio Defense
- C39 King's Gambit Accepted: Kieseritzky, Rice Gambit
- C39 King's Gambit Accepted: Kieseritzky, Salvio Defense, Cozio Variation
- C39 King's Gambit Accepted: King's Knight's Gambit
- C40 Elephant Gambit
- C40 Elephant Gambit: Maróczy Gambit
- C40 Elephant Gambit: Paulsen Countergambit
- C40 Elephant Gambit: Wasp Variation
- C40 Gunderam Defense
- C40 King's Knight Opening
- C40 King's Pawn Game: Busch-Gass Gambit
- C40 King's Pawn Game: Busch-Gass Gambit, Chiodini Gambit
- C40 King's Pawn Game: Damiano Defense
- C40 King's Pawn Game: Damiano Defense, Damiano Gambit
- C40 King's Pawn Game: Damiano Defense, Damiano Gambit, Chigorin Gambit
- C40 King's Pawn Game: Gunderam Defense, Gunderam Gambit
- C40 King's Pawn Game: Gunderam Gambit
- C40 King's Pawn Game: La Bourdonnais Gambit
- C40 King's Pawn Game: McConnell Defense
- C40 Latvian Gambit
- C40 Latvian Gambit Accepted
- C40 Latvian Gambit Accepted: Bilguer Variation
- C40 Latvian Gambit Accepted: Bronstein Attack
- C40 Latvian Gambit Accepted: Bronstein Gambit
- C40 Latvian Gambit Accepted: Foltys Variation
- C40 Latvian Gambit Accepted: Foltys-Leonhardt Variation
- C40 Latvian Gambit Accepted: Leonhardt Variation
- C40 Latvian Gambit Accepted: Main Line
- C40 Latvian Gambit Accepted: Nimzowitsch Attack
- C40 Latvian Gambit: Behting Variation
- C40 Latvian Gambit: Corkscrew Countergambit
- C40 Latvian Gambit: Corkscrew Gambit
- C40 Latvian Gambit: Diepstraten Countergambit
- C40 Latvian Gambit: Fraser Defense
- C40 Latvian Gambit: Greco Variation
- C40 Latvian Gambit: Lobster Gambit
- C40 Latvian Gambit: Mason Countergambit
- C40 Latvian Gambit: Mayet Attack
- C40 Latvian Gambit: Mayet Attack, Morgado Defense
- C40 Latvian Gambit: Mayet Attack, Poisoned Pawn Variation
- C40 Latvian Gambit: Mayet Attack, Polerio-Svedenborg Variation
- C40 Latvian Gambit: Mayet Attack, Strautins Gambit
- C40 Latvian Gambit: Mlotkowski Variation
- C40 Latvian Gambit: Senechaud Gambit
- C41 Philidor Defense
- C41 Philidor Defense
- C41 Philidor Defense
- C41 Philidor Defense
- C41 Philidor Defense: Albin-Blackburne Gambit
- C41 Philidor Defense: Berger Variation
- C41 Philidor Defense: Bird Gambit
- C41 Philidor Defense: Boden Variation
- C41 Philidor Defense: Exchange Variation
- C41 Philidor Defense: Exchange Variation
- C41 Philidor Defense: Exchange Variation
- C41 Philidor Defense: Hanham Variation
- C41 Philidor Defense: Hanham Variation, Delmar Variation
- C41 Philidor Defense: Hanham Variation, Krause Variation
- C41 Philidor Defense: Hanham Variation, Schlechter Variation
- C41 Philidor Defense: Hanham Variation, Sharp Variation
- C41 Philidor Defense: Hanham Variation, Steiner Variation
- C41 Philidor Defense: Hanham, Kmoch Variation
- C41 Philidor Defense: Larsen Variation
- C41 Philidor Defense: Lion Variation
- C41 Philidor Defense: Lion Variation, Bishop Sacrifice
- C41 Philidor Defense: Lion Variation, Delayed Bishop Sacrifice
- C41 Philidor Defense: Lion Variation, Forcing Line
- C41 Philidor Defense: Lion Variation, Lion's Claw, with Bc4 and h6
- C41 Philidor Defense: Lion Variation, Lion's Claw, with Be2 and c6
- C41 Philidor Defense: Lion Variation, Shirov Gambit
- C41 Philidor Defense: Lion Variation, Sozin Variation
- C41 Philidor Defense: Lopez Countergambit
- C41 Philidor Defense: Lopez Countergambit, Jaenisch Variation
- C41 Philidor Defense: Morphy Gambit
- C41 Philidor Defense: Nimzowitsch Variation
- C41 Philidor Defense: Nimzowitsch Variation
- C41 Philidor Defense: Nimzowitsch Variation, Klein Variation
- C41 Philidor Defense: Nimzowitsch Variation, Rellstab Variation
- C41 Philidor Defense: Nimzowitsch Variation, Sokolsky Variation
- C41 Philidor Defense: Nimzowitsch, Larobok Variation
- C41 Philidor Defense: Nimzowitsch, Locock Variation
- C41 Philidor Defense: Paulsen Attack
- C41 Philidor Defense: Philidor Countergambit
- C41 Philidor Defense: Philidor Countergambit, Berger Variation
- C41 Philidor Defense: Philidor Countergambit, del Rio Attack
- C41 Philidor Defense: Philidor Countergambit, Zukertort Variation
- C41 Philidor Defense: Philidor Gambit
- C41 Philidor Defense: Steinitz Variation
- C42 Petrov's Defense
- C42 Petrov's Defense
- C42 Petrov's Defense
- C42 Petrov's Defense
- C42 Petrov's Defense
- C42 Petrov's Defense: Classical Attack
- C42 Petrov's Defense: Classical Attack, Berger Variation
- C42 Petrov's Defense: Classical Attack, Chigorin Variation
- C42 Petrov's Defense: Classical Attack, Chigorin Variation, Browne Attack
- C42 Petrov's Defense: Classical Attack, Chigorin Variation, Main Line
- C42 Petrov's Defense: Classical Attack, Closed Variation
- C42 Petrov's Defense: Classical Attack, Jaenisch Variation
- C42 Petrov's Defense: Classical Attack, Krause Variation
- C42 Petrov's Defense: Classical Attack, Maróczy Variation
- C42 Petrov's Defense: Classical Attack, Marshall Trap
- C42 Petrov's Defense: Classical Attack, Marshall Variation
- C42 Petrov's Defense: Classical Attack, Marshall Variation, Chinese Gambit
- C42 Petrov's Defense: Classical Attack, Mason Variation
- C42 Petrov's Defense: Classical Attack, Mason-Showalter Variation
- C42 Petrov's Defense: Classical Attack, Staunton Variation
- C42 Petrov's Defense: Classical Attack, Tarrasch Variation
- C42 Petrov's Defense: Cochrane Gambit
- C42 Petrov's Defense: Cochrane Gambit, Bishop Check Line
- C42 Petrov's Defense: Cochrane Gambit, Center Variation
- C42 Petrov's Defense: Cozio Attack
- C42 Petrov's Defense: Damiano Variation
- C42 Petrov's Defense: Damiano Variation, Kholmov Gambit
- C42 Petrov's Defense: French Attack
- C42 Petrov's Defense: Italian Variation
- C42 Petrov's Defense: Karklins-Martinovsky Variation
- C42 Petrov's Defense: Kaufmann Attack
- C42 Petrov's Defense: Millennium Attack
- C42 Petrov's Defense: Moody Gambit
- C42 Petrov's Defense: Nimzowitsch Attack
- C42 Petrov's Defense: Paulsen Attack
- C42 Petrov's Defense: Stafford Gambit
- C42 Petrov's Defense: Stafford Gambit
- C42 Petrov's Defense: Three Knights Game
- C43 Bishop's Opening: Urusov Gambit
- C43 Bishop's Opening: Urusov Gambit, Keidansky Gambit
- C43 Petrov's Defense: Modern Attack
- C43 Petrov's Defense: Modern Attack
- C43 Petrov's Defense: Modern Attack, Bardeleben Variation
- C43 Petrov's Defense: Modern Attack, Center Attack
- C43 Petrov's Defense: Modern Attack, Center Variation
- C43 Petrov's Defense: Modern Attack, Murrey Variation
- C43 Petrov's Defense: Modern Attack, Steinitz Variation
- C43 Petrov's Defense: Modern Attack, Symmetrical Variation
- C43 Petrov's Defense: Modern Attack, Tal Gambit
- C43 Petrov's Defense: Modern Attack, Trifunovic Variation
- C44 Dresden Opening: The Goblin
- C44 Irish Gambit
- C44 King's Knight Opening: Konstantinopolsky
- C44 King's Knight Opening: Normal Variation
- C44 King's Pawn Game: Dresden Opening
- C44 King's Pawn Game: Pachman Wing Gambit
- C44 King's Pawn Game: Schulze-Müller Gambit
- C44 King's Pawn Game: Tayler Opening
- C44 King's Pawn Game: Tayler Opening
- C44 King's Pawn Game: Tayler Opening, Basman Gambit
- C44 King's Pawn Game: Tayler Opening, Inverted Hanham
- C44 Latvian Gambit: Clam Gambit
- C44 Ponziani Opening
- C44 Ponziani Opening: Caro Gambit
- C44 Ponziani Opening: Jaenisch Counterattack
- C44 Ponziani Opening: Jaenisch Counterattack
- C44 Ponziani Opening: Jaenisch Counterattack
- C44 Ponziani Opening: Jaenisch Counterattack
- C44 Ponziani Opening: Leonhardt Variation
- C44 Ponziani Opening: Neumann Gambit
- C44 Ponziani Opening: Ponziani Countergambit
- C44 Ponziani Opening: Ponziani Countergambit, Schmidt Attack
- C44 Ponziani Opening: Réti Variation
- C44 Ponziani Opening: Romanishin Variation
- C44 Ponziani Opening: Spanish Variation
- C44 Ponziani Opening: Spanish Variation, Harrwitz Attack, Nikitin Gambit
- C44 Ponziani Opening: Steinitz Variation
- C44 Ponziani Opening: Vukovic Gambit
- C44 Scotch Game
- C44 Scotch Game
- C44 Scotch Game: Benima Defense
- C44 Scotch Game: Cochrane Variation
- C44 Scotch Game: Cochrane-Shumov Defense
- C44 Scotch Game: Göring Gambit
- C44 Scotch Game: Göring Gambit, Bardeleben Variation
- C44 Scotch Game: Göring Gambit, Double Pawn Sacrifice
- C44 Scotch Game: Göring Gambit, Main Line
- C44 Scotch Game: Hanneken Variation
- C44 Scotch Game: Haxo Gambit
- C44 Scotch Game: Lolli Variation
- C44 Scotch Game: Lolli Variation
- C44 Scotch Game: Napoleon Gambit
- C44 Scotch Game: Relfsson Gambit
- C44 Scotch Game: Scotch Gambit
- C44 Scotch Game: Scotch Gambit, Advance Variation
- C44 Scotch Game: Scotch Gambit, Cochrane-Anderssen Variation
- C44 Scotch Game: Scotch Gambit, Dubois Réti Defense
- C44 Scotch Game: Scotch Gambit, Göring Gambit Declined
- C44 Scotch Game: Scotch Gambit, Kingside Variation
- C44 Scotch Game: Scotch Gambit, London Defense
- C44 Scotch Game: Scotch Gambit, Sarratt Variation
- C44 Scotch Game: Sea-Cadet Mate
- C44 Scotch Game: Vitzthum Attack
- C45 Scotch Game
- C45 Scotch Game
- C45 Scotch Game: Alekhine Gambit
- C45 Scotch Game: Blumenfeld Attack
- C45 Scotch Game: Braune Variation
- C45 Scotch Game: Classical Variation
- C45 Scotch Game: Classical Variation, Blackburne Attack
- C45 Scotch Game: Classical Variation, Intermezzo Variation
- C45 Scotch Game: Classical Variation, Millennium Variation
- C45 Scotch Game: Fraser Variation
- C45 Scotch Game: Ghulam-Kassim Variation
- C45 Scotch Game: Gottschall Variation
- C45 Scotch Game: Horwitz Attack
- C45 Scotch Game: Horwitz Attack, Blackburne Variation
- C45 Scotch Game: Malaniuk Variation
- C45 Scotch Game: Meitner Variation
- C45 Scotch Game: Mieses Variation
- C45 Scotch Game: Modern Defense
- C45 Scotch Game: Paulsen Attack
- C45 Scotch Game: Paulsen Variation
- C45 Scotch Game: Paulsen, Gunsberg Defense
- C45 Scotch Game: Potter Variation
- C45 Scotch Game: Romanishin Variation
- C45 Scotch Game: Rosenthal Variation
- C45 Scotch Game: Schmidt Variation
- C45 Scotch Game: Steinitz Variation
- C45 Scotch Game: Steinitz Variation
- C45 Scotch Game: Tartakower Variation
- C46 Three Knights Opening
- C46 Three Knights Opening
- C46 Three Knights Opening: Schlechter Variation
- C46 Three Knights Opening: Steinitz Defense
- C46 Three Knights Opening: Steinitz-Rosenthal Variation
- C46 Three Knights Opening: Winawer Defense
- C47 Four Knights Game
- C47 Four Knights Game: Glek System
- C47 Four Knights Game: Glek System
- C47 Four Knights Game: Gunsberg Variation
- C47 Four Knights Game: Halloween Gambit
- C47 Four Knights Game: Halloween Gambit, Oldtimer Variation
- C47 Four Knights Game: Halloween Gambit, Plasma Variation
- C47 Four Knights Game: Italian Variation
- C47 Four Knights Game: Italian Variation, Noa Gambit
- C47 Four Knights Game: Naroditsky Variation
- C47 Four Knights Game: Scotch Variation
- C47 Four Knights Game: Scotch Variation Accepted
- C47 Four Knights Game: Scotch Variation Accepted, Main Line
- C47 Four Knights Game: Scotch Variation, Belgrade Gambit
- C47 Four Knights Game: Scotch Variation, Belgrade Gambit, Modern Defense
- C47 Four Knights Game: Scotch Variation, Krause Gambit
- C47 Four Knights Game: Scotch Variation, Krause Gambit, Leonhardt Defense
- C47 Four Knights Game: Scotch Variation, Oxford Gambit
- C47 Four Knights Game: Scotch Variation, Schmid Defense
- C48 Four Knights Game: Spanish Variation
- C48 Four Knights Game: Spanish Variation, Bardeleben Variation
- C48 Four Knights Game: Spanish Variation, Classical Variation
- C48 Four Knights Game: Spanish Variation, Ranken Variation
- C48 Four Knights Game: Spanish Variation, Rubinstein Variation
- C48 Four Knights Game: Spanish Variation, Rubinstein Variation
- C48 Four Knights Game: Spanish Variation, Rubinstein Variation
- C48 Four Knights Game: Spanish Variation, Rubinstein Variation Accepted
- C48 Four Knights Game: Spanish Variation, Rubinstein Variation, Henneberger Variation
- C48 Four Knights Game: Spanish Variation, Rubinstein Variation, Maróczy Variation
- C48 Four Knights Game: Spanish Variation, Rubinstein Variation, Marshall Gambit
- C48 Four Knights Game: Spanish Variation, Rubinstein Variation, Marshall Variation
- C48 Four Knights Game: Spanish Variation, Spielmann Variation
- C49 Four Knights Game: Spanish Variation
- C49 Four Knights Game: Spanish Variation, Alatortsev Variation
- C49 Four Knights Game: Spanish Variation, Double Spanish
- C49 Four Knights Game: Spanish Variation, Double Spanish
- C49 Four Knights Game: Spanish Variation, Gunsberg Counterattack
- C49 Four Knights Game: Spanish Variation, Janowski Variation
- C49 Four Knights Game: Spanish Variation, Nimzowitsch Variation
- C49 Four Knights Game: Spanish Variation, Svenonius Variation
- C49 Four Knights Game: Spanish Variation, Symmetrical Variation
- C49 Four Knights Game: Spanish Variation, Symmetrical Variation
- C49 Four Knights Game: Spanish Variation, Symmetrical Variation
- C49 Four Knights Game: Spanish Variation, Symmetrical Variation
- C49 Four Knights Game: Spanish Variation, Symmetrical Variation, Blake Variation
- C49 Four Knights Game: Spanish Variation, Symmetrical Variation, Metger Unpin
- C49 Four Knights Game: Spanish Variation, Symmetrical Variation, Tarrasch Variation
- C50 Four Knights Game: Italian Variation
- C50 Italian Game
- C50 Italian Game: Anti-Fried Liver Defense
- C50 Italian Game: Blackburne-Kostić Gambit
- C50 Italian Game: Classical Variation, Albin Gambit
- C50 Italian Game: Deutz Gambit
- C50 Italian Game: Giuoco Pianissimo
- C50 Italian Game: Giuoco Pianissimo
- C50 Italian Game: Giuoco Pianissimo, Canal Variation
- C50 Italian Game: Giuoco Pianissimo, Dubois Variation
- C50 Italian Game: Giuoco Pianissimo, Italian Four Knights Variation
- C50 Italian Game: Giuoco Pianissimo, Lucchini Gambit
- C50 Italian Game: Giuoco Pianissimo, Normal
- C50 Italian Game: Giuoco Piano
- C50 Italian Game: Hungarian Defense
- C50 Italian Game: Hungarian Defense, Tartakower Variation
- C50 Italian Game: Jerome Gambit
- C50 Italian Game: Paris Defense
- C50 Italian Game: Rosentreter Gambit
- C50 Italian Game: Rousseau Gambit
- C51 Italian Game: Evans Gambit
- C51 Italian Game: Evans Gambit
- C51 Italian Game: Evans Gambit Accepted
- C51 Italian Game: Evans Gambit Declined
- C51 Italian Game: Evans Gambit Declined
- C51 Italian Game: Evans Gambit Declined, Cordel Variation
- C51 Italian Game: Evans Gambit Declined, Hicken Variation
- C51 Italian Game: Evans Gambit Declined, Hirschbach Variation
- C51 Italian Game: Evans Gambit Declined, Lange Variation
- C51 Italian Game: Evans Gambit Declined, Pavlov Variation
- C51 Italian Game: Evans Gambit Declined, Showalter Variation
- C51 Italian Game: Evans Gambit Declined, Vasquez Variation
- C51 Italian Game: Evans Gambit, Anderssen Variation
- C51 Italian Game: Evans Gambit, Anderssen Variation, Cordel Line
- C51 Italian Game: Evans Gambit, Fontaine Countergambit
- C51 Italian Game: Evans Gambit, Fraser Attack
- C51 Italian Game: Evans Gambit, Fraser-Mortimer Attack
- C51 Italian Game: Evans Gambit, Göring Attack
- C51 Italian Game: Evans Gambit, Harding Variation
- C51 Italian Game: Evans Gambit, Hein Countergambit
- C51 Italian Game: Evans Gambit, Mayet Defense
- C51 Italian Game: Evans Gambit, McDonnell Defense
- C51 Italian Game: Evans Gambit, McDonnell Defense, Main Line
- C51 Italian Game: Evans Gambit, Morphy Attack
- C51 Italian Game: Evans Gambit, Mortimer-Evans Gambit
- C51 Italian Game: Evans Gambit, Paulsen Variation
- C51 Italian Game: Evans Gambit, Steinitz Variation
- C51 Italian Game: Evans Gambit, Stone-Ware Variation
- C51 Italian Game: Evans Gambit, Ulvestad Variation
- C52 Italian Game: Evans Gambit
- C52 Italian Game: Evans Gambit, Alapin-Steinitz Variation
- C52 Italian Game: Evans Gambit, Anderssen Defense
- C52 Italian Game: Evans Gambit, Bronstein Defense
- C52 Italian Game: Evans Gambit, Compromised Defense
- C52 Italian Game: Evans Gambit, Compromised Defense, Main Line
- C52 Italian Game: Evans Gambit, Compromised Defense, Potter Variation
- C52 Italian Game: Evans Gambit, Dufresne Defense
- C52 Italian Game: Evans Gambit, Johner Defense
- C52 Italian Game: Evans Gambit, Laroche Variation
- C52 Italian Game: Evans Gambit, Lasker Defense
- C52 Italian Game: Evans Gambit, Leonhardt Countergambit
- C52 Italian Game: Evans Gambit, Levenfish Variation
- C52 Italian Game: Evans Gambit, Main Line
- C52 Italian Game: Evans Gambit, Mieses Defense
- C52 Italian Game: Evans Gambit, Pierce Defense
- C52 Italian Game: Evans Gambit, Richardson Attack
- C52 Italian Game: Evans Gambit, Sanders-Alapin Variation
- C52 Italian Game: Evans Gambit, Slow Variation
- C52 Italian Game: Evans Gambit, Sokolsky Variation
- C52 Italian Game: Evans Gambit, Tartakower Attack
- C52 Italian Game: Evans Gambit, Waller Attack
- C53 Italian Game: Bird's Attack
- C53 Italian Game: Classical Variation
- C53 Italian Game: Classical Variation, Center Holding Variation
- C53 Italian Game: Classical Variation, Closed Variation
- C53 Italian Game: Classical Variation, Eisinger Variation
- C53 Italian Game: Classical Variation, La Bourdonnais Variation
- C53 Italian Game: Classical Variation, Mestel Variation
- C53 Italian Game: Classical Variation, Tarrasch Variation
- C54 Italian Game: Classical Variation
- C54 Italian Game: Classical Variation, Center Attack
- C54 Italian Game: Classical Variation, Ghulam-Kassim Variation
- C54 Italian Game: Classical Variation, Giuoco Pianissimo
- C54 Italian Game: Classical Variation, Giuoco Pianissimo
- C54 Italian Game: Classical Variation, Giuoco Pianissimo
- C54 Italian Game: Classical Variation, Giuoco Pianissimo
- C54 Italian Game: Classical Variation, Giuoco Pianissimo
- C54 Italian Game: Classical Variation, Giuoco Pianissimo
- C54 Italian Game: Classical Variation, Giuoco Pianissimo
- C54 Italian Game: Classical Variation, Giuoco Pianissimo
- C54 Italian Game: Classical Variation, Giuoco Pianissimo
- C54 Italian Game: Classical Variation, Giuoco Pianissimo
- C54 Italian Game: Classical Variation, Giuoco Pianissimo
- C54 Italian Game: Classical Variation, Giuoco Pianissimo
- C54 Italian Game: Classical Variation, Giuoco Pianissimo
- C54 Italian Game: Classical Variation, Giuoco Pianissimo
- C54 Italian Game: Classical Variation, Giuoco Pianissimo, Albin Variation
- C54 Italian Game: Classical Variation, Giuoco Pianissimo, Main Line
- C54 Italian Game: Classical Variation, Giuoco Pianissimo, with a4 a5
- C54 Italian Game: Classical Variation, Giuoco Pianissimo, with a5
- C54 Italian Game: Classical Variation, Giuoco Pianissimo, with a6
- C54 Italian Game: Classical Variation, Giuoco Pianissimo, with a6
- C54 Italian Game: Classical Variation, Giuoco Pianissimo, with h6
- C54 Italian Game: Classical Variation, Greco Gambit, Anderssen Variation
- C54 Italian Game: Classical Variation, Greco Gambit, Dubov Italian
- C54 Italian Game: Classical Variation, Greco Gambit, Greco Variation
- C54 Italian Game: Classical Variation, Greco Gambit, Main Line
- C54 Italian Game: Classical Variation, Greco Gambit, Modern Line
- C54 Italian Game: Classical Variation, Greco Gambit, Modern Line
- C54 Italian Game: Classical Variation, Greco Gambit, Moeller-Bayonet Attack
- C54 Italian Game: Classical Variation, Greco Gambit, Moeller-Therkatz Attack
- C54 Italian Game: Classical Variation, Greco Gambit, Traditional Line
- C54 Italian Game: Classical Variation, with d5
- C54 Italian Game: Giuoco Piano, Aitken Variation
- C54 Italian Game: Giuoco Piano, Bernstein Variation
- C54 Italian Game: Giuoco Piano, Cracow Variation
- C54 Italian Game: Giuoco Piano, Greco's Attack
- C54 Italian Game: Giuoco Piano, Holzhausen Attack
- C54 Italian Game: Giuoco Piano, Krause Variation
- C54 Italian Game: Giuoco Piano, Rosentreter Variation
- C54 Italian Game: Giuoco Piano, Steinitz Variation
- C54 Italian Game: Giuoco Piano, Therkatz-Herzog Variation
- C55 Italian Game: Two Knights Defense
- C55 Italian Game: Two Knights Defense
- C55 Italian Game: Two Knights Defense
- C55 Italian Game: Two Knights Defense, Modern Bishop's Opening
- C55 Italian Game: Two Knights Defense, Modern Bishop's Opening
- C56 Italian Game: Scotch Gambit
- C56 Italian Game: Scotch Gambit, Anderssen Attack
- C56 Italian Game: Scotch Gambit, Anderssen Attack, Main Line
- C56 Italian Game: Scotch Gambit, Canal Variation
- C56 Italian Game: Scotch Gambit, de Riviere Defense
- C56 Italian Game: Scotch Gambit, Double Gambit Accepted
- C56 Italian Game: Scotch Gambit, Janowski Defense
- C56 Italian Game: Scotch Gambit, Max Lange Attack
- C56 Italian Game: Scotch Gambit, Max Lange Attack
- C56 Italian Game: Scotch Gambit, Max Lange Attack Accepted
- C56 Italian Game: Scotch Gambit, Max Lange Attack, Long Variation
- C56 Italian Game: Scotch Gambit, Max Lange Attack, Spielmann Defense
- C56 Italian Game: Scotch Gambit, Nakhmanson Gambit
- C56 Italian Game: Scotch Gambit, Walbrodt-Baird Gambit
- C56 Italian Game: Scotch Invitation Declined
- C56 Italian Game: Two Knights Defense, Keidansky Variation
- C56 Italian Game: Two Knights Defense, Max Lange Attack
- C56 Italian Game: Two Knights Defense, Max Lange Attack, Berger Variation
- C56 Italian Game: Two Knights Defense, Max Lange Attack, Krause Variation
- C56 Italian Game: Two Knights Defense, Max Lange Attack, Loman Defense
- C56 Italian Game: Two Knights Defense, Max Lange Attack, Rubinstein Variation
- C56 Italian Game: Two Knights Defense, Open Variation
- C56 Italian Game: Two Knights Defense, Perreux Variation
- C56 Italian Game: Two Knights Defense, Yurdansky Attack
- C57 Italian Game: Two Knights Defense, Fegatello Attack, Leonhardt Variation
- C57 Italian Game: Two Knights Defense, Fried Liver Attack
- C57 Italian Game: Two Knights Defense, Fritz Variation
- C57 Italian Game: Two Knights Defense, Fritz, Gruber Variation
- C57 Italian Game: Two Knights Defense, Kloss Gambit
- C57 Italian Game: Two Knights Defense, Knight Attack
- C57 Italian Game: Two Knights Defense, Knight Attack, Normal Variation
- C57 Italian Game: Two Knights Defense, Lolli Attack
- C57 Italian Game: Two Knights Defense, Pincus Variation
- C57 Italian Game: Two Knights Defense, Ponziani-Steinitz Gambit
- C57 Italian Game: Two Knights Defense, Traxler Counterattack
- C57 Italian Game: Two Knights Defense, Traxler Counterattack, Bishop Sacrifice Line
- C57 Italian Game: Two Knights Defense, Traxler Counterattack, King March Line
- C57 Italian Game: Two Knights Defense, Traxler Counterattack, Knight Sacrifice Line
- C57 Italian Game: Two Knights Defense, Traxler Variation, Trencianske-Teplice Gambit
- C57 Italian Game: Two Knights Defense, Ulvestad Variation
- C57 Italian Game: Two Knights Defense, Ulvestad Variation, Kurkin Gambit
- C58 Italian Game: Two Knights Defense
- C58 Italian Game: Two Knights Defense, Blackburne Variation
- C58 Italian Game: Two Knights Defense, Colman Variation
- C58 Italian Game: Two Knights Defense, Maróczy Variation
- C58 Italian Game: Two Knights Defense, Paoli Variation
- C58 Italian Game: Two Knights Defense, Polerio Defense
- C58 Italian Game: Two Knights Defense, Polerio Defense, Bishop Check Line
- C58 Italian Game: Two Knights Defense, Polerio Defense, Bogoljubow Variation
- C58 Italian Game: Two Knights Defense, Polerio Defense, Kieseritzky Variation
- C58 Italian Game: Two Knights Defense, Polerio Defense, Yankovich Variation
- C59 Italian Game: Two Knights Defense, Knorre Variation
- C59 Italian Game: Two Knights Defense, Polerio Defense, Göring Variation
- C59 Italian Game: Two Knights Defense, Polerio Defense, Suhle Defense
- C59 Italian Game: Two Knights Defense, Steinitz Variation
- C60 Ruy Lopez
- C60 Ruy Lopez: Alapin Defense
- C60 Ruy Lopez: Alapin Defense, Alapin Gambit
- C60 Ruy Lopez: Brentano Gambit
- C60 Ruy Lopez: Bulgarian Variation
- C60 Ruy Lopez: Cozio Defense
- C60 Ruy Lopez: Cozio Defense, Paulsen Variation
- C60 Ruy Lopez: Cozio Defense, Tartakower Gambit
- C60 Ruy Lopez: Fianchetto Defense
- C60 Ruy Lopez: Fianchetto Defense, Kevitz Gambit
- C60 Ruy Lopez: Lucena Variation
- C60 Ruy Lopez: Nürnberg Variation
- C60 Ruy Lopez: Pollock Defense
- C60 Ruy Lopez: Retreat Variation
- C60 Ruy Lopez: Rotary-Albany Gambit
- C60 Ruy Lopez: Spanish Countergambit
- C60 Ruy Lopez: Spanish Countergambit, Harding Countergambit, Fricke Gambit
- C60 Ruy Lopez: Spanish Countergambit, Harding Gambit
- C60 Ruy Lopez: Vinogradov Variation
- C61 Ruy Lopez: Bird Variation
- C61 Ruy Lopez: Bird Variation, Paulsen Variation
- C62 Ruy Lopez: Steinitz Defense
- C62 Ruy Lopez: Steinitz Defense
- C62 Ruy Lopez: Steinitz Defense, Center Gambit
- C62 Ruy Lopez: Steinitz Defense, Nimzowitsch Attack
- C62 Ruy Lopez: Steinitz Defense, Semi-Duras Variation
- C63 Ruy Lopez: Schliemann Defense
- C63 Ruy Lopez: Schliemann Defense, Classical Variation
- C63 Ruy Lopez: Schliemann Defense, Dyckhoff Variation
- C63 Ruy Lopez: Schliemann Defense, Exchange Variation
- C63 Ruy Lopez: Schliemann Defense, Jaenisch Gambit Accepted
- C63 Ruy Lopez: Schliemann Defense, Kostić Defense
- C63 Ruy Lopez: Schliemann Defense, Möhring Variation
- C63 Ruy Lopez: Schliemann Defense, Schönemann Attack
- C63 Ruy Lopez: Schliemann Defense, Tartakower Variation
- C64 Ruy Lopez: Classical Defense, Benelux Variation
- C64 Ruy Lopez: Classical Defense, Boden Variation
- C64 Ruy Lopez: Classical Defense, Zaitsev Variation
- C64 Ruy Lopez: Classical Variation
- C64 Ruy Lopez: Classical Variation, Central Variation
- C64 Ruy Lopez: Classical Variation, Charousek Variation
- C64 Ruy Lopez: Classical Variation, Cordel Gambit
- C64 Ruy Lopez: Classical Variation, Konikowski Gambit
- C64 Ruy Lopez: Classical Variation, Modern Main Line
- C64 Ruy Lopez: Classical Variation, Spanish Wing Gambit
- C65 Ruy Lopez: Berlin Defense
- C65 Ruy Lopez: Berlin Defense
- C65 Ruy Lopez: Berlin Defense, Anti-Berlin Variation
- C65 Ruy Lopez: Berlin Defense, Anti-Berlin Variation, Anderssen Variation
- C65 Ruy Lopez: Berlin Defense, Anti-Berlin Variation, Duras Variation
- C65 Ruy Lopez: Berlin Defense, Anti-Berlin Variation, Kaufmann Variation
- C65 Ruy Lopez: Berlin Defense, Anti-Berlin Variation, Mortimer Trap
- C65 Ruy Lopez: Berlin Defense, Anti-Berlin Variation, Mortimer Variation
- C65 Ruy Lopez: Berlin Defense, Beverwijk Variation
- C65 Ruy Lopez: Berlin Defense, Fishing Pole Variation
- C65 Ruy Lopez: Berlin Defense, Nyholm Attack
- C65 Ruy Lopez: Classical Variation, Zukertort Gambit
- C65 Ruy Lopez: Halloween Attack
- C66 Ruy Lopez: Berlin Defense, Closed Bernstein Variation
- C66 Ruy Lopez: Berlin Defense, Closed Showalter Variation
- C66 Ruy Lopez: Berlin Defense, Closed Wolf Variation
- C66 Ruy Lopez: Berlin Defense, Hedgehog Variation
- C66 Ruy Lopez: Berlin Defense, Improved Steinitz Defense
- C66 Ruy Lopez: Berlin Defense, Tarrasch Trap
- C66 Ruy Lopez: Closed Berlin Defense, Chigorin Variation
- C67 Ruy Lopez: Berlin Defense, Berlin Wall
- C67 Ruy Lopez: Berlin Defense, Cordel Variation
- C67 Ruy Lopez: Berlin Defense, l'Hermet Variation
- C67 Ruy Lopez: Berlin Defense, l'Hermet Variation, Berlin Wall Defense
- C67 Ruy Lopez: Berlin Defense, l'Hermet Variation, Westerinen Line
- C67 Ruy Lopez: Berlin Defense, Minckwitz Variation
- C67 Ruy Lopez: Berlin Defense, Pillsbury Variation
- C67 Ruy Lopez: Berlin Defense, Rio de Janeiro Variation
- C67 Ruy Lopez: Berlin Defense, Rio de Janeiro Variation
- C67 Ruy Lopez: Berlin Defense, Rio Gambit Accepted
- C67 Ruy Lopez: Berlin Defense, Rosenthal Variation
- C67 Ruy Lopez: Berlin Defense, Trifunovic Variation
- C67 Ruy Lopez: Berlin Defense, Winawer Attack
- C67 Ruy Lopez: Berlin Defense, Zukertort Variation
- C67 Ruy Lopez: Open Berlin Defense, l'Hermet Variation
- C67 Ruy Lopez: Open Berlin Defense, Showalter Variation
- C68 Ruy Lopez: Exchange Variation
- C68 Ruy Lopez: Exchange Variation, Alekhine Variation
- C68 Ruy Lopez: Exchange Variation, Keres Variation
- C68 Ruy Lopez: Exchange Variation, Lutikov Variation
- C68 Ruy Lopez: Exchange Variation, Romanovsky Variation
- C68 Ruy Lopez: Exchange, Alekhine Variation
- C69 Ruy Lopez: Exchange Variation, Alapin Gambit
- C69 Ruy Lopez: Exchange Variation, Bronstein Variation
- C69 Ruy Lopez: Exchange Variation, Gligoric Variation
- C69 Ruy Lopez: Exchange Variation, King's Bishop Variation
- C69 Ruy Lopez: Exchange Variation, Normal Variation
- C70 Ruy Lopez: Bird's Defense Deferred
- C70 Ruy Lopez: Morphy Defense
- C70 Ruy Lopez: Morphy Defense, Alapin's Defense Deferred
- C70 Ruy Lopez: Morphy Defense, Caro Variation
- C70 Ruy Lopez: Morphy Defense, Classical Defense Deferred
- C70 Ruy Lopez: Morphy Defense, Cozio Defense
- C70 Ruy Lopez: Morphy Defense, Fianchetto Defense Deferred
- C70 Ruy Lopez: Morphy Defense, Graz Variation
- C70 Ruy Lopez: Morphy Defense, Norwegian Variation
- C70 Ruy Lopez: Morphy Defense, Norwegian Variation, Nightingale Gambit
- C70 Ruy Lopez: Morphy Defense, Schliemann Defense Deferred
- C70 Ruy Lopez: Morphy Defense, Schliemann Defense Deferred, Jaenisch Gambit Deferred
- C71 Ruy Lopez: Morphy Defense, Modern Steinitz Defense
- C71 Ruy Lopez: Morphy Defense, Modern Steinitz Defense
- C71 Ruy Lopez: Morphy Defense, Modern Steinitz Defense
- C71 Ruy Lopez: Noah's Ark Trap
- C72 Ruy Lopez: Closed, Kecskemet Variation
- C72 Ruy Lopez: Morphy Defense, Modern Steinitz Defense
- C73 Ruy Lopez: Morphy Defense, Modern Steinitz Defense
- C73 Ruy Lopez: Morphy Defense, Modern Steinitz Defense
- C74 Ruy Lopez: Morphy Defense, Modern Steinitz Defense
- C74 Ruy Lopez: Morphy Defense, Modern Steinitz Defense
- C74 Ruy Lopez: Morphy Defense, Modern Steinitz Defense, Siesta Variation
- C75 Ruy Lopez: Morphy Defense, Modern Steinitz Defense
- C75 Ruy Lopez: Morphy Defense, Modern Steinitz Defense
- C76 Ruy Lopez: Morphy Defense, Modern Steinitz Defense, Fianchetto Variation
- C77 Ruy Lopez: Morphy Defense, Anderssen Variation
- C77 Ruy Lopez: Morphy Defense, Bayreuth Variation
- C77 Ruy Lopez: Morphy Defense, Duras Variation
- C77 Ruy Lopez: Morphy Defense, Jaffe Gambit
- C77 Ruy Lopez: Morphy Defense, Mackenzie Variation
- C77 Ruy Lopez: Morphy Defense, Tarrasch Variation
- C77 Ruy Lopez: Morphy Defense, Wormald Attack
- C77 Ruy Lopez: Wormald Attack, Grünfeld Variation
- C78 Ruy Lopez: Brix Variation
- C78 Ruy Lopez: Central Countergambit
- C78 Ruy Lopez: Morphy Defense
- C78 Ruy Lopez: Morphy Defense
- C78 Ruy Lopez: Morphy Defense, Arkhangelsk Variation
- C78 Ruy Lopez: Morphy Defense, Møller Variation
- C78 Ruy Lopez: Morphy Defense, Neo-Arkhangelsk Variation
- C78 Ruy Lopez: Morphy Defense, Wing Attack
- C78 Ruy Lopez: Rabinovich Variation
- C79 Ruy Lopez: Morphy Defense, Steinitz Deferred
- C79 Ruy Lopez: Morphy Defense, Steinitz Deferred
- C79 Ruy Lopez: Steinitz Defense Deferred, Boleslavsky Variation
- C79 Ruy Lopez: Steinitz Defense Deferred, Lipnitsky Variation
- C80 Ruy Lopez: Morphy Defense, Tartakower Variation
- C80 Ruy Lopez: Open
- C80 Ruy Lopez: Open
- C80 Ruy Lopez: Open
- C80 Ruy Lopez: Open
- C80 Ruy Lopez: Open, Berger Variation
- C80 Ruy Lopez: Open, Bernstein Variation
- C80 Ruy Lopez: Open, Bernstein Variation, Luther Line
- C80 Ruy Lopez: Open, Friess Attack
- C80 Ruy Lopez: Open, Harksen Gambit
- C80 Ruy Lopez: Open, Karpov Gambit
- C80 Ruy Lopez: Open, Knorre Variation
- C80 Ruy Lopez: Open, Main Line
- C80 Ruy Lopez: Open, Richter Variation
- C80 Ruy Lopez: Open, Riga Variation
- C80 Ruy Lopez: Open, Schlechter Defense
- C80 Ruy Lopez: Open, Skipworth Gambit
- C80 Ruy Lopez: Open, Zukertort Variation
- C81 Ruy Lopez: Open, Howell Attack
- C81 Ruy Lopez: Open, Howell Attack
- C81 Ruy Lopez: Open, Howell Attack, Ekstrom Variation
- C82 Ruy Lopez: Open
- C82 Ruy Lopez: Open, Berlin Variation
- C82 Ruy Lopez: Open, Dilworth Variation
- C82 Ruy Lopez: Open, Italian Variation
- C82 Ruy Lopez: Open, Motzko Attack
- C82 Ruy Lopez: Open, Motzko Attack, Nenarokov Variation
- C82 Ruy Lopez: Open, St. Petersburg Variation
- C83 Ruy Lopez: Open, Breslau Variation
- C83 Ruy Lopez: Open, Classical Defense
- C83 Ruy Lopez: Open, Classical Defense
- C83 Ruy Lopez: Open, Classical Defense, Main Line
- C83 Ruy Lopez: Open, Malkin Variation
- C83 Ruy Lopez: Open, Tarrasch Trap
- C84 Ruy Lopez: Closed
- C84 Ruy Lopez: Closed, Basque Gambit
- C84 Ruy Lopez: Closed, Center Attack
- C84 Ruy Lopez: Closed, Center Attack, Basque Gambit
- C84 Ruy Lopez: Closed, Martinez Variation
- C84 Ruy Lopez: Closed, Morphy Attack
- C85 Ruy Lopez: Closed, Delayed Exchange
- C86 Ruy Lopez: Closed, Worrall Attack
- C86 Ruy Lopez: Closed, Worrall Attack, Castling Line
- C86 Ruy Lopez: Closed, Worrall Attack, Castling Line
- C86 Ruy Lopez: Closed, Worrall Attack, Delayed Castling Line
- C87 Ruy Lopez: Closed, Averbakh Variation
- C88 Ruy Lopez: Closed
- C88 Ruy Lopez: Closed
- C88 Ruy Lopez: Closed, Alekhine Gambit
- C88 Ruy Lopez: Closed, Anti-Marshall
- C88 Ruy Lopez: Closed, Balla Variation
- C88 Ruy Lopez: Closed, Leonhardt Variation
- C88 Ruy Lopez: Closed, Rosen Attack
- C88 Ruy Lopez: Closed, Trajkovic Counterattack
- C88 Ruy Lopez: Noah's Ark Trap
- C89 Ruy Lopez: Marshall Attack
- C89 Ruy Lopez: Marshall Attack, Main Line
- C89 Ruy Lopez: Marshall Attack, Main Line, Spassky Variation
- C89 Ruy Lopez: Marshall Attack, Modern Main Line
- C89 Ruy Lopez: Marshall Attack, Modern Variation
- C89 Ruy Lopez: Marshall Attack, Original Marshall Attack
- C89 Ruy Lopez: Marshall Attack, Re3 Variation
- C89 Ruy Lopez: Marshall Attack, Steiner Variation
- C90 Ruy Lopez: Closed
- C90 Ruy Lopez: Closed, Lutikov Variation
- C90 Ruy Lopez: Closed, Pilnik Variation
- C90 Ruy Lopez: Closed, Suetin Variation
- C91 Ruy Lopez: Closed, Bogoljubow Variation
- C91 Ruy Lopez: Closed, Yates Variation
- C91 Ruy Lopez: Closed, Yates Variation, Short Attack
- C92 Ruy Lopez: Closed
- C92 Ruy Lopez: Closed, Flohr System
- C92 Ruy Lopez: Closed, Karpov Variation
- C92 Ruy Lopez: Closed, Kholmov Variation
- C92 Ruy Lopez: Closed, Smyslov-Breyer-Zaitsev Hybrid
- C92 Ruy Lopez: Closed, Zaitsev System
- C93 Ruy Lopez: Closed, Smyslov Defense
- C94 Ruy Lopez: Closed, Breyer Defense
- C94 Ruy Lopez: Closed, Breyer Defense, Quiet Variation
- C95 Ruy Lopez: Closed, Breyer
- C95 Ruy Lopez: Closed, Breyer Defense
- C95 Ruy Lopez: Closed, Breyer Defense
- C95 Ruy Lopez: Closed, Breyer Defense, Zaitsev Hybrid
- C96 Ruy Lopez: Closed, Borisenko Variation
- C96 Ruy Lopez: Closed, Chigorin Defense
- C96 Ruy Lopez: Closed, Chigorin Defense
- C96 Ruy Lopez: Closed, Chigorin Defense, Gajewski Gambit
- C96 Ruy Lopez: Closed, Keres Defense
- C96 Ruy Lopez: Closed, Rossolimo Defense
- C97 Ruy Lopez: Closed, Chigorin Defense
- C97 Ruy Lopez: Closed, Chigorin Defense
- C97 Ruy Lopez: Closed, Chigorin, Yugoslav System
- C98 Ruy Lopez: Closed, Chigorin Defense
- C98 Ruy Lopez: Closed, Chigorin Defense
- C99 Ruy Lopez: Closed, Chigorin Defense, Panov System
D — Closed & Semi-Closed (560)
- D00 Amazon Attack
- D00 Blackmar-Diemer Gambit
- D00 Blackmar-Diemer Gambit
- D00 Blackmar-Diemer Gambit Accepted
- D00 Blackmar-Diemer Gambit Accepted: Bogoljubow Defense
- D00 Blackmar-Diemer Gambit Accepted: Bogoljubow Defense, Kloss Attack
- D00 Blackmar-Diemer Gambit Accepted: Bogoljubow Defense, Mad Dog Attack
- D00 Blackmar-Diemer Gambit Accepted: Bogoljubow Defense, Nimzowitsch Attack
- D00 Blackmar-Diemer Gambit Accepted: Bogoljubow Defense, Studier Attack
- D00 Blackmar-Diemer Gambit Accepted: Euwe Defense
- D00 Blackmar-Diemer Gambit Accepted: Euwe Defense, Zilbermints Gambit
- D00 Blackmar-Diemer Gambit Accepted: Gunderam Defense
- D00 Blackmar-Diemer Gambit Accepted: Gunderam Defense, Stader Variation
- D00 Blackmar-Diemer Gambit Accepted: Holwell Defense
- D00 Blackmar-Diemer Gambit Accepted: Kaulich Defense
- D00 Blackmar-Diemer Gambit Accepted: Pietrowsky Defense
- D00 Blackmar-Diemer Gambit Accepted: Ritter Defense
- D00 Blackmar-Diemer Gambit Accepted: Ryder Gambit
- D00 Blackmar-Diemer Gambit Accepted: Schlutter Defense
- D00 Blackmar-Diemer Gambit Accepted: Teichmann Defense
- D00 Blackmar-Diemer Gambit Accepted: Teichmann Defense, Ciesielski Variation
- D00 Blackmar-Diemer Gambit Accepted: Teichmann Defense, Classical Variation
- D00 Blackmar-Diemer Gambit Accepted: Teichmann Defense, Seidel-Hall Attack
- D00 Blackmar-Diemer Gambit Accepted: Ziegler Defense
- D00 Blackmar-Diemer Gambit Declined: Brombacher Countergambit
- D00 Blackmar-Diemer Gambit Declined: Elbert Countergambit
- D00 Blackmar-Diemer Gambit Declined: Gedult Defense
- D00 Blackmar-Diemer Gambit Declined: Lamb Defense
- D00 Blackmar-Diemer Gambit Declined: Langeheinicke Defense
- D00 Blackmar-Diemer Gambit Declined: O'Kelly Defense
- D00 Blackmar-Diemer Gambit Declined: Vienna Defense
- D00 Blackmar-Diemer Gambit Declined: Weinsbach Defense
- D00 Blackmar-Diemer Gambit: Blackmar Gambit
- D00 Blackmar-Diemer Gambit: Diemer-Rosenberg Attack
- D00 Blackmar-Diemer Gambit: Fritz Attack
- D00 Blackmar-Diemer Gambit: Lemberger Countergambit
- D00 Blackmar-Diemer Gambit: Lemberger Countergambit, Endgame Variation
- D00 Blackmar-Diemer Gambit: Lemberger Countergambit, Lange Gambit
- D00 Blackmar-Diemer Gambit: Lemberger Countergambit, Rasmussen Attack
- D00 Blackmar-Diemer Gambit: Lemberger Countergambit, Sneiders Attack
- D00 Blackmar-Diemer Gambit: Lemberger Countergambit, Soller Attack
- D00 Blackmar-Diemer Gambit: Netherlands Variation
- D00 Blackmar-Diemer Gambit: Rasa-Studier Gambit
- D00 Blackmar-Diemer Gambit: Reversed Albin Countergambit
- D00 Blackmar-Diemer Gambit: von Popiel Gambit
- D00 Blackmar-Diemer Gambit: von Popiel Gambit, Zilbermints Variation
- D00 Blackmar-Diemer Gambit: Zeller Defense
- D00 Blackmar-Diemer Gambit: Zeller Defense, Soller Attack
- D00 Queen's Pawn Game
- D00 Queen's Pawn Game
- D00 Queen's Pawn Game
- D00 Queen's Pawn Game: Accelerated London System
- D00 Queen's Pawn Game: Accelerated London System, Steinitz Countergambit
- D00 Queen's Pawn Game: Accelerated London System, Steinitz Countergambit Accepted
- D00 Queen's Pawn Game: Accelerated London System, Steinitz Countergambit, Morris Countergambit
- D00 Queen's Pawn Game: Accelerated London System, Steinitz Countergambit, Morris Countergambit Accepted
- D00 Queen's Pawn Game: Chigorin Variation
- D00 Queen's Pawn Game: Chigorin Variation
- D00 Queen's Pawn Game: Chigorin Variation, Alburt Defense
- D00 Queen's Pawn Game: Chigorin Variation, Anti-Veresov
- D00 Queen's Pawn Game: Chigorin Variation, Fianchetto Defense
- D00 Queen's Pawn Game: Chigorin Variation, Irish Gambit
- D00 Queen's Pawn Game: Chigorin Variation, Shaviliuk Gambit
- D00 Queen's Pawn Game: Chigorin Variation, Shropshire Defense
- D00 Queen's Pawn Game: Hübsch Gambit
- D00 Queen's Pawn Game: Levitsky Attack
- D00 Queen's Pawn Game: Levitsky Attack, Welling Variation
- D00 Queen's Pawn Game: Mason Attack
- D00 Queen's Pawn Game: Stonewall Attack
- D00 Queen's Pawn Game: Zurich Gambit
- D01 Rapport-Jobava System
- D01 Rapport-Jobava System
- D01 Rapport-Jobava System
- D01 Rapport-Jobava System, with e6
- D01 Richter-Veresov Attack
- D01 Richter-Veresov Attack
- D01 Richter-Veresov Attack: Boyce Defense
- D01 Richter-Veresov Attack: Malich Gambit
- D01 Richter-Veresov Attack: Richter Variation
- D01 Richter-Veresov Attack: Two Knights System
- D01 Richter-Veresov Attack: Two Knights System, Grünfeld Defense
- D01 Richter-Veresov Attack: Veresov Variation
- D02 London System: Poisoned Pawn Variation
- D02 Queen's Gambit Declined: Baltic Defense, Pseudo-Slav
- D02 Queen's Pawn Game: Anti-Torre
- D02 Queen's Pawn Game: Chandler Gambit
- D02 Queen's Pawn Game: Chigorin Variation
- D02 Queen's Pawn Game: Krause Variation
- D02 Queen's Pawn Game: Levitsky Attack, Euwe Variation, Modern Line
- D02 Queen's Pawn Game: London System
- D02 Queen's Pawn Game: London System
- D02 Queen's Pawn Game: London System
- D02 Queen's Pawn Game: London System
- D02 Queen's Pawn Game: London System, Pterodactyl Variation
- D02 Queen's Pawn Game: London System, with e6
- D02 Queen's Pawn Game: London System, with e6
- D02 Queen's Pawn Game: Symmetrical Variation
- D02 Queen's Pawn Game: Symmetrical Variation, Pseudo-Catalan
- D02 Queen's Pawn Game: Zilbermints Countergambit
- D02 Queen's Pawn Game: Zukertort Variation
- D03 Queen's Pawn Game: Torre Attack
- D03 Queen's Pawn Game: Torre Attack, Gossip Variation
- D03 Queen's Pawn Game: Torre Attack, Grünfeld Variation
- D04 Queen's Pawn Game: Colle System
- D04 Queen's Pawn Game: Colle System, Anti-Colle
- D04 Queen's Pawn Game: Colle System, Grünfeld Formation
- D05 Queen's Pawn Game: Colle System
- D05 Queen's Pawn Game: Colle System
- D05 Queen's Pawn Game: Colle System
- D05 Queen's Pawn Game: Colle System
- D05 Queen's Pawn Game: Colle System
- D05 Queen's Pawn Game: Colle System
- D05 Queen's Pawn Game: Colle System
- D05 Queen's Pawn Game: Colle System, Traditional Colle
- D05 Queen's Pawn Game: Zukertort Variation
- D05 Rubinstein Opening
- D05 Rubinstein Opening: Bogoljubow Defense
- D05 Rubinstein Opening: Classical Defense
- D05 Rubinstein Opening: Semi-Slav Defense
- D05 Rubinstein Opening: Semi-Slav Defense
- D05 Rubinstein Opening: Semi-Slav Defense
- D06 Queen's Gambit
- D06 Queen's Gambit Declined: Austrian Attack, Salvio Countergambit
- D06 Queen's Gambit Declined: Austrian Defense
- D06 Queen's Gambit Declined: Austrian Defense, Gusev Countergambit
- D06 Queen's Gambit Declined: Austrian Defense, Haberditz Variation
- D06 Queen's Gambit Declined: Baltic Defense
- D06 Queen's Gambit Declined: Baltic Defense, Argentinian Gambit
- D06 Queen's Gambit Declined: Baltic Defense, Pseudo-Chigorin
- D06 Queen's Gambit Declined: Baltic Defense, Queen Attack
- D06 Queen's Gambit Declined: Baltic Defense, Queen Attack Deferred
- D06 Queen's Gambit Declined: Marshall Defense
- D06 Queen's Gambit Declined: Marshall Defense, Tan Gambit
- D06 Queen's Gambit Declined: Zilbermints Gambit
- D07 Queen's Gambit Declined: Chigorin Defense
- D07 Queen's Gambit Declined: Chigorin Defense
- D07 Queen's Gambit Declined: Chigorin Defense
- D07 Queen's Gambit Declined: Chigorin Defense, Exchange Variation
- D07 Queen's Gambit Declined: Chigorin Defense, Exchange Variation, Costa's Line
- D07 Queen's Gambit Declined: Chigorin Defense, Janowski Variation
- D07 Queen's Gambit Declined: Chigorin Defense, Lazard Gambit
- D07 Queen's Gambit Declined: Chigorin Defense, Main Line
- D07 Queen's Gambit Declined: Chigorin Defense, Main Line, Alekhine Variation
- D07 Queen's Gambit Declined: Chigorin Defense, Modern Gambit
- D07 Queen's Gambit Declined: Chigorin Defense, Tartakower Gambit
- D08 Queen's Gambit Declined: Albin Countergambit
- D08 Queen's Gambit Declined: Albin Countergambit, Balogh Variation
- D08 Queen's Gambit Declined: Albin Countergambit, Janowski Variation
- D08 Queen's Gambit Declined: Albin Countergambit, Krenosz Variation
- D08 Queen's Gambit Declined: Albin Countergambit, Lasker Trap
- D08 Queen's Gambit Declined: Albin Countergambit, Modern Line
- D08 Queen's Gambit Declined: Albin Countergambit, Normal Line
- D08 Queen's Gambit Declined: Albin Countergambit, Spassky Variation
- D08 Queen's Gambit Declined: Albin Countergambit, Tartakower Defense
- D09 Queen's Gambit Declined: Albin Countergambit, Fianchetto Variation
- D09 Queen's Gambit Declined: Albin Countergambit, Fianchetto Variation, Be6 Line
- D09 Queen's Gambit Declined: Albin Countergambit, Fianchetto Variation, Bf5 Line
- D09 Queen's Gambit Declined: Albin Countergambit, Fianchetto Variation, Bg4 Line
- D10 Slav Defense
- D10 Slav Defense
- D10 Slav Defense
- D10 Slav Defense: Diemer Gambit
- D10 Slav Defense: Exchange Variation
- D10 Slav Defense: Exchange Variation, Boor Attack
- D10 Slav Defense: Slav Gambit, Alekhine Attack
- D10 Slav Defense: Winawer Countergambit
- D10 Slav Defense: Winawer Countergambit, Anti-Winawer Gambit
- D11 Slav Defense: Bonet Gambit
- D11 Slav Defense: Breyer Variation
- D11 Slav Defense: Modern Line
- D11 Slav Defense: Modern Line
- D11 Slav Defense: Quiet Variation
- D11 Slav Defense: Quiet Variation, Pin Defense
- D12 Slav Defense: Quiet Variation, Amsterdam Variation
- D12 Slav Defense: Quiet Variation, Landau Variation
- D12 Slav Defense: Quiet Variation, Schallopp Defense
- D12 Slav Defense: Quiet Variation, Schallopp Defense
- D13 Slav Defense: Exchange Variation
- D13 Slav Defense: Exchange Variation, Schallopp Variation
- D14 Slav Defense: Exchange Variation, Symmetrical Line
- D14 Slav Defense: Exchange Variation, Trifunovic Variation
- D15 Slav Defense: Alekhine Variation
- D15 Slav Defense: Chebanenko Variation
- D15 Slav Defense: Chebanenko Variation
- D15 Slav Defense: Chebanenko Variation, Advance System
- D15 Slav Defense: Geller Gambit
- D15 Slav Defense: Geller Gambit
- D15 Slav Defense: Schlechter Variation
- D15 Slav Defense: Süchting Variation
- D15 Slav Defense: Three Knights Variation
- D15 Slav Defense: Two Knights Attack
- D16 Slav Defense: Alapin Variation
- D16 Slav Defense: Smyslov Variation
- D16 Slav Defense: Soultanbeieff Variation
- D16 Slav Defense: Steiner Variation
- D17 Slav Defense: Czech Variation
- D17 Slav Defense: Czech Variation, Bled Attack
- D17 Slav Defense: Czech Variation, Carlsbad Variation
- D17 Slav Defense: Czech Variation, Carlsbad Variation, Morozevich Variation
- D17 Slav Defense: Czech Variation, Krause Attack
- D17 Slav Defense: Czech Variation, Krause Attack, Fazekas Gambit
- D17 Slav Defense: Czech Variation, Wiesbaden Variation
- D17 Slav Defense: Czech Variation, Wiesbaden Variation, Sharp Line
- D18 Slav Defense: Czech Variation, Classical System
- D18 Slav Defense: Czech Variation, Lasker Variation
- D19 Slav Defense: Czech Variation, Classical System, Main Line
- D19 Slav Defense: Czech Variation, Dutch Variation
- D19 Slav Defense: Czech Variation, Dutch Variation, Sämisch Variation
- D20 Queen's Gambit Accepted
- D20 Queen's Gambit Accepted: Accelerated Mannheim Variation
- D20 Queen's Gambit Accepted: Central Variation, Alekhine System
- D20 Queen's Gambit Accepted: Central Variation, Greco Variation
- D20 Queen's Gambit Accepted: Central Variation, McDonnell Defense
- D20 Queen's Gambit Accepted: Central Variation, McDonnell Defense, Somov Gambit
- D20 Queen's Gambit Accepted: Central Variation, Modern Defense
- D20 Queen's Gambit Accepted: Central Variation, Rubinstein Defense
- D20 Queen's Gambit Accepted: Central Variation, Rubinstein Defense, Yefimov Gambit
- D20 Queen's Gambit Accepted: Linares Variation
- D20 Queen's Gambit Accepted: Old Variation
- D20 Queen's Gambit Accepted: Old Variation, Billinger Gambit
- D20 Queen's Gambit Accepted: Old Variation, Christensen Gambit
- D20 Queen's Gambit Accepted: Old Variation, Korchnoi Gambit
- D20 Queen's Gambit Accepted: Old Variation, Novikov Gambit
- D20 Queen's Gambit Accepted: Saduleto Variation
- D20 Queen's Gambit Accepted: Schwartz Defense
- D21 Queen's Gambit Accepted: Alekhine Defense, Borisenko-Furman Variation
- D21 Queen's Gambit Accepted: Godes Variation
- D21 Queen's Gambit Accepted: Gunsberg Defense
- D21 Queen's Gambit Accepted: Normal Variation
- D21 Queen's Gambit Accepted: Rosenthal Variation
- D21 Queen's Gambit Accepted: Slav Gambit
- D22 Queen's Gambit Accepted: Alekhine Defense
- D22 Queen's Gambit Accepted: Alekhine Defense, Alatortsev Variation
- D22 Queen's Gambit Accepted: Alekhine Defense, Haberditz Variation
- D23 Queen's Gambit Accepted
- D23 Queen's Gambit Accepted: Mannheim Variation
- D24 Queen's Gambit Accepted
- D24 Queen's Gambit Accepted: Bogoljubow Defense
- D24 Queen's Gambit Accepted: Gunsberg Defense, Prianishenmo Gambit
- D24 Queen's Gambit Accepted: Showalter Variation
- D25 Queen's Gambit Accepted: Janowski-Larsen Variation
- D25 Queen's Gambit Accepted: Normal Variation
- D25 Queen's Gambit Accepted: Smyslov Variation
- D25 Queen's Gambit Accepted: Winawer Defense
- D26 Queen's Gambit Accepted: Classical Defense
- D26 Queen's Gambit Accepted: Classical Defense, Normal Line
- D26 Queen's Gambit Accepted: Classical Defense, Steinitz Variation, Development Variation
- D26 Queen's Gambit Accepted: Classical Defense, Steinitz Variation, Exchange Variation
- D26 Queen's Gambit Accepted: Classical, Furman Variation
- D26 Queen's Gambit Accepted: Normal Variation, Traditional System
- D27 Queen's Gambit Accepted: Classical Defense, Main Line
- D27 Queen's Gambit Accepted: Classical Defense, Rubinstein Variation
- D27 Queen's Gambit Accepted: Classical Defense, Russian Gambit
- D27 Queen's Gambit Accepted: Furman Variation
- D28 Queen's Gambit Accepted: Classical Defense, Alekhine System
- D28 Queen's Gambit Accepted: Classical Defense, Alekhine System
- D28 Queen's Gambit Accepted: Classical, Flohr Variation
- D29 Queen's Gambit Accepted: Classical Defense, Alekhine System, Main Line
- D29 Queen's Gambit Accepted: Classical Defense, Alekhine System, Smyslov Variation
- D30 Queen's Gambit Declined
- D30 Queen's Gambit Declined: Capablanca Variation
- D30 Queen's Gambit Declined: Capablanca Variation
- D30 Queen's Gambit Declined: Semmering Variation
- D30 Queen's Gambit Declined: Spielmann Variation
- D30 Queen's Gambit Declined: Stonewall Variation
- D30 Queen's Gambit Declined: Tarrasch Defense, Pseudo-Tarrasch
- D30 Queen's Gambit Declined: Tarrasch Defense, Pseudo-Tarrasch Bishop Attack
- D30 Queen's Gambit Declined: Traditional Variation
- D30 Queen's Gambit Declined: Vienna Variation
- D30 Semi-Slav Defense: Quiet Variation
- D30 Semi-Slav Defense: Quiet Variation
- D31 Queen's Gambit Declined: Alapin Variation
- D31 Queen's Gambit Declined: Charousek Variation
- D31 Queen's Gambit Declined: Charousek Variation, Miladinovic Gambit
- D31 Queen's Gambit Declined: Janowski Variation
- D31 Queen's Gambit Declined: Queen's Knight Variation
- D31 Queen's Gambit Declined: Semi-Slav, Abrahams Variation
- D31 Queen's Gambit Declined: Semi-Slav, Junge Variation
- D31 Queen's Gambit Declined: Semi-Slav, Koomen Variation
- D31 Semi-Slav Defense: Accelerated Move Order
- D31 Semi-Slav Defense: Anti-Noteboom, Stonewall Variation, Portisch Gambit
- D31 Semi-Slav Defense: Gunderam Gambit
- D31 Semi-Slav Defense: Marshall Gambit
- D31 Semi-Slav Defense: Marshall Gambit, Forgotten Variation
- D31 Semi-Slav Defense: Marshall Gambit, Main Line
- D31 Semi-Slav Defense: Marshall Gambit, Tolush Variation
- D31 Semi-Slav Defense: Noteboom Variation
- D31 Semi-Slav Defense: Noteboom Variation, Abrahams Variation
- D31 Semi-Slav Defense: Noteboom Variation, Anti-Noteboom Gambit
- D31 Semi-Slav Defense: Noteboom Variation, Anti-Noteboom Variation
- D31 Semi-Slav Defense: Noteboom Variation, Anti-Noteboom Variation, Belyavsky Line
- D32 Queen's Gambit Declined: Tarrasch Defense
- D32 Tarrasch Defense
- D32 Tarrasch Defense: Grünfeld Gambit
- D32 Tarrasch Defense: Marshall Gambit
- D32 Tarrasch Defense: Schara Gambit
- D32 Tarrasch Defense: Symmetrical Variation
- D32 Tarrasch Defense: Tarrasch Gambit
- D32 Tarrasch Defense: Two Knights Variation
- D32 Tarrasch Defense: von Hennig Gambit
- D33 Tarrasch Defense: Dubov Tarrasch
- D33 Tarrasch Defense: Prague Variation
- D33 Tarrasch Defense: Rubinstein System
- D33 Tarrasch Defense: Swedish Variation
- D33 Tarrasch Defense: Swedish Variation, Central Break
- D33 Tarrasch Defense: Wagner Variation
- D34 Queen's Gambit Declined: Tarrasch Defense, Stoltz Variation
- D34 Tarrasch Defense: Classical Variation
- D34 Tarrasch Defense: Classical Variation, Advance Variation
- D34 Tarrasch Defense: Classical Variation, Bogoljubow Variation
- D34 Tarrasch Defense: Classical Variation, Carlsbad Variation
- D34 Tarrasch Defense: Classical Variation, Chandler Variation
- D34 Tarrasch Defense: Classical Variation, Classical Tarrasch Gambit
- D34 Tarrasch Defense: Classical Variation, Endgame Variation
- D34 Tarrasch Defense: Classical Variation, Main Line
- D34 Tarrasch Defense: Classical Variation, Petursson Variation
- D34 Tarrasch Defense: Classical Variation, Réti Variation
- D34 Tarrasch Defense: Classical Variation, Spassky Variation
- D34 Tarrasch Defense: Prague Variation, Main Line
- D35 Queen's Gambit Declined: Exchange Variation
- D35 Queen's Gambit Declined: Exchange Variation
- D35 Queen's Gambit Declined: Exchange Variation, Carlsen Variation
- D35 Queen's Gambit Declined: Exchange Variation, Chameleon Variation
- D35 Queen's Gambit Declined: Exchange Variation, Positional Variation
- D35 Queen's Gambit Declined: Exchange Variation, Positional Variation
- D35 Queen's Gambit Declined: Exchange Variation, Sämisch Variation
- D35 Queen's Gambit Declined: Harrwitz Attack
- D35 Queen's Gambit Declined: Normal Defense
- D36 Queen's Gambit Declined: Exchange Variation, Reshevsky Variation
- D36 Queen's Gambit Declined: Exchange Variation, Reshevsky Variation
- D36 Queen's Gambit Declined: Exchange Variation, Reshevsky Variation
- D36 Queen's Gambit Declined: Exchange Variation, Reshevsky Variation
- D37 Queen's Gambit Declined: Barmen Variation
- D37 Queen's Gambit Declined: Harrwitz Attack
- D37 Queen's Gambit Declined: Harrwitz Attack
- D37 Queen's Gambit Declined: Harrwitz Attack
- D37 Queen's Gambit Declined: Harrwitz Attack, Fianchetto Defense
- D37 Queen's Gambit Declined: Harrwitz Attack, Main Line
- D37 Queen's Gambit Declined: Harrwitz Attack, Orthodox Defense
- D37 Queen's Gambit Declined: Harrwitz Attack, Two Knights Defense
- D37 Queen's Gambit Declined: Harrwitz Attack, Two Knights Defense, Blockade Line
- D37 Queen's Gambit Declined: Knight Defense, Alekhine Gambit
- D37 Queen's Gambit Declined: Miles Variation
- D37 Queen's Gambit Declined: Three Knights Variation
- D37 Queen's Gambit Declined: Three Knights, Vienna Variation
- D37 Queen's Gambit Declined: Vienna Variation, Quiet Variation
- D38 Queen's Gambit Declined: Ragozin Defense
- D38 Queen's Gambit Declined: Ragozin Defense, Alekhine Variation
- D38 Queen's Gambit Declined: Westphalian Variation
- D39 Queen's Gambit Declined: Ragozin Defense, Vienna Variation
- D40 Queen's Gambit Declined: Semi-Tarrasch Defense
- D40 Queen's Gambit Declined: Semi-Tarrasch Defense, Levenfish Variation
- D40 Queen's Gambit Declined: Semi-Tarrasch Defense, Pillsbury Variation
- D40 Queen's Gambit Declined: Semi-Tarrasch Defense, Symmetrical Variation
- D41 Queen's Gambit Declined: Semi-Tarrasch Defense
- D41 Queen's Gambit Declined: Semi-Tarrasch Defense
- D41 Queen's Gambit Declined: Semi-Tarrasch Defense, Endgame Variation
- D41 Queen's Gambit Declined: Semi-Tarrasch Defense, Exchange Variation
- D41 Queen's Gambit Declined: Semi-Tarrasch Defense, Exchange Variation
- D41 Queen's Gambit Declined: Semi-Tarrasch Defense, Kmoch Variation
- D41 Queen's Gambit Declined: Semi-Tarrasch Defense, Pillsbury Variation
- D41 Queen's Gambit Declined: Semi-Tarrasch Defense, San Sebastian Variation
- D42 Queen's Gambit Declined: Semi-Tarrasch Defense, Main Line
- D43 Semi-Slav Defense
- D43 Semi-Slav Defense: Anti-Moscow Gambit
- D43 Semi-Slav Defense: Hastings Variation
- D43 Semi-Slav Defense: Moscow Variation
- D44 Semi-Slav Defense Accepted
- D44 Semi-Slav Defense: Botvinnik Variation
- D44 Semi-Slav Defense: Botvinnik Variation
- D44 Semi-Slav Defense: Botvinnik Variation, Alatortsev System
- D44 Semi-Slav Defense: Botvinnik Variation, Ekstrom Variation
- D44 Semi-Slav Defense: Botvinnik Variation, Lilienthal Variation
- D44 Semi-Slav Defense: Botvinnik Variation, Szabo Variation
- D45 Semi-Slav Defense: Accelerated Meran Variation
- D45 Semi-Slav Defense: Main Line
- D45 Semi-Slav Defense: Normal Variation
- D45 Semi-Slav Defense: Normal Variation
- D45 Semi-Slav Defense: Normal Variation
- D45 Semi-Slav Defense: Rubinstein System
- D45 Semi-Slav Defense: Stoltz Variation
- D45 Semi-Slav Defense: Stoltz Variation
- D45 Semi-Slav Defense: Stoltz Variation
- D45 Semi-Slav Defense: Stoltz Variation
- D45 Semi-Slav Defense: Stoltz Variation
- D45 Semi-Slav Defense: Stoltz Variation, Center Variation
- D45 Semi-Slav Defense: Stoltz Variation, Center Variation, Mikhalchishin Line
- D45 Semi-Slav Defense: Stoltz Variation, Shabalov Attack
- D45 Semi-Slav Defense: Stonewall Defense
- D46 Semi-Slav Defense: Bogoljubow Variation
- D46 Semi-Slav Defense: Chigorin Defense
- D46 Semi-Slav Defense: Chigorin Defense
- D46 Semi-Slav Defense: Chigorin Defense
- D46 Semi-Slav Defense: Chigorin Defense
- D46 Semi-Slav Defense: Chigorin Defense
- D46 Semi-Slav Defense: Chigorin Defense
- D46 Semi-Slav Defense: Chigorin Defense
- D46 Semi-Slav Defense: Chigorin Defense
- D46 Semi-Slav Defense: Main Line
- D46 Semi-Slav Defense: Main Line
- D46 Semi-Slav Defense: Romih Variation
- D47 Semi-Slav Defense: Meran Variation
- D47 Semi-Slav Defense: Meran Variation, Lundin Variation
- D47 Semi-Slav Defense: Meran Variation, Wade Variation
- D47 Semi-Slav Defense: Meran Variation, Wade Variation, Kaidanov Gambit
- D47 Semi-Slav Defense: Meran Variation, Wade Variation, Larsen Variation
- D47 Semi-Slav Defense: Semi-Meran Variation
- D48 Semi-Slav Defense: Meran Variation
- D48 Semi-Slav Defense: Meran Variation
- D48 Semi-Slav Defense: Meran Variation, Old Variation
- D48 Semi-Slav Defense: Meran Variation, Pirc Variation
- D48 Semi-Slav Defense: Meran Variation, Reynolds' Variation
- D49 Semi-Slav Defense: Meran Variation, Blumenfeld Variation
- D49 Semi-Slav Defense: Meran Variation, Rabinovich Variation
- D49 Semi-Slav Defense: Meran Variation, Rellstab Attack
- D49 Semi-Slav Defense: Meran Variation, Sozin Variation
- D49 Semi-Slav Defense: Meran Variation, Sozin Variation
- D49 Semi-Slav Defense: Meran Variation, Stahlberg Variation
- D50 Queen's Gambit Declined: Been-Koomen Variation
- D50 Queen's Gambit Declined: Modern Variation
- D50 Queen's Gambit Declined: Pseudo-Tarrasch Variation
- D50 Queen's Gambit Declined: Pseudo-Tarrasch Variation, Canal Variation
- D50 Queen's Gambit Declined: Pseudo-Tarrasch Variation, Primitive Pillsbury Variation
- D50 Queen's Gambit Declined: Semi-Tarrasch Defense, Krause Variation
- D51 Queen's Gambit Declined: Alekhine Variation
- D51 Queen's Gambit Declined: Capablanca Variation, Anti-Cambridge Springs Variation
- D51 Queen's Gambit Declined: Manhattan Variation
- D51 Queen's Gambit Declined: Modern Variation, Knight Defense
- D51 Queen's Gambit Declined: Modern Variation, Knight Defense
- D51 Queen's Gambit Declined: Modern Variation, Knight Defense
- D51 Queen's Gambit Declined: Rochlin Variation
- D52 Queen's Gambit Declined
- D52 Queen's Gambit Declined: Cambridge Springs Defense
- D52 Queen's Gambit Declined: Cambridge Springs Defense
- D52 Queen's Gambit Declined: Cambridge Springs Defense, Argentine Variation
- D52 Queen's Gambit Declined: Cambridge Springs Defense, Bogoljubow Variation
- D52 Queen's Gambit Declined: Cambridge Springs Defense, Capablanca Variation
- D52 Queen's Gambit Declined: Cambridge Springs Defense, Rubinstein Variation
- D52 Queen's Gambit Declined: Cambridge Springs Defense, Yugoslav Variation
- D53 Queen's Gambit Declined
- D53 Queen's Gambit Declined
- D53 Queen's Gambit Declined: Lasker Defense
- D53 Queen's Gambit Declined: Modern Variation, Heral Variation
- D53 Queen's Gambit Declined: Uhlmann Variation
- D54 Queen's Gambit Declined: Neo-Orthodox Variation
- D55 Queen's Gambit Declined: Anti-Tartakower Variation
- D55 Queen's Gambit Declined: Anti-Tartakower Variation, Petrosian Variation
- D55 Queen's Gambit Declined: Modern Variation, Normal Line
- D55 Queen's Gambit Declined: Neo-Orthodox Variation
- D55 Queen's Gambit Declined: Neo-Orthodox Variation, Main Line
- D55 Queen's Gambit Declined: Pillsbury Attack
- D56 Queen's Gambit Declined: Lasker Defense
- D56 Queen's Gambit Declined: Lasker Defense, Russian Variation
- D56 Queen's Gambit Declined: Lasker Defense, Teichmann Variation
- D57 Queen's Gambit Declined: Lasker Defense, Bernstein Variation
- D57 Queen's Gambit Declined: Lasker Defense, Bernstein Variation, Mar del Plata Gambit
- D57 Queen's Gambit Declined: Lasker Defense, Main Line
- D58 Queen's Gambit Declined: Tartakower Defense
- D58 Queen's Gambit Declined: Tartakower Defense, Exchange Variation
- D59 Queen's Gambit Declined: Tartakower Defense
- D59 Queen's Gambit Declined: Tartakower Defense, Makogonov Exchange Variation
- D60 Queen's Gambit Declined: Orthodox Defense
- D60 Queen's Gambit Declined: Orthodox Defense, Botvinnik Variation
- D60 Queen's Gambit Declined: Orthodox Defense, Rauzer Variation
- D61 Queen's Gambit Declined: Orthodox Defense, Rubinstein Variation
- D62 Queen's Gambit Declined: Orthodox Defense, Rubinstein Variation, Flohr Line
- D63 Queen's Gambit Declined: Orthodox Defense, Capablanca Variation
- D63 Queen's Gambit Declined: Orthodox Defense, Henneberger Variation
- D63 Queen's Gambit Declined: Orthodox Defense, Main Line
- D63 Queen's Gambit Declined: Orthodox Defense, Main Line
- D63 Queen's Gambit Declined: Orthodox Defense, Pillsbury Variation
- D63 Queen's Gambit Declined: Orthodox Defense, Swiss, Carlsbad Variation
- D64 Queen's Gambit Declined: Orthodox Defense, Rubinstein Attack
- D64 Queen's Gambit Declined: Orthodox Defense, Rubinstein Attack
- D64 Queen's Gambit Declined: Orthodox Defense, Rubinstein Attack
- D64 Queen's Gambit Declined: Orthodox Defense, Rubinstein Attack
- D65 Queen's Gambit Declined: Orthodox Defense, Rubinstein Attack
- D66 Queen's Gambit Declined: Orthodox Defense, Bd3 Line
- D66 Queen's Gambit Declined: Orthodox Defense, Fianchetto Variation
- D67 Queen's Gambit Declined: Orthodox Defense, Alekhine Variation
- D67 Queen's Gambit Declined: Orthodox Defense, Bd3 Line
- D67 Queen's Gambit Declined: Orthodox Defense, Capablanca System
- D67 Queen's Gambit Declined: Orthodox Defense, Janowski Variation
- D67 Queen's Gambit Declined: Orthodox Defense, Main Line
- D68 Queen's Gambit Declined: Orthodox Defense, Classical Variation
- D68 Queen's Gambit Declined: Orthodox Defense, Classical Variation
- D68 Queen's Gambit Declined: Orthodox Defense, Classical Variation
- D69 Queen's Gambit Declined: Orthodox Defense, Classical Variation
- D70 Neo-Grünfeld Defense: Goglidze Attack
- D70 Neo-Grünfeld Defense: with g3
- D70 Neo-Grünfeld Defense: with Nf3
- D71 Neo-Grünfeld Defense: Exchange Variation
- D72 Neo-Grünfeld Defense: with g3
- D73 Neo-Grünfeld Defense: with g3
- D74 Neo-Grünfeld Defense: Delayed Exchange Variation
- D75 Neo-Grünfeld Defense: Delayed Exchange Variation
- D75 Neo-Grünfeld Defense: Delayed Exchange Variation
- D76 Neo-Grünfeld Defense: Delayed Exchange Variation
- D77 Neo-Grünfeld Defense: Classical Variation
- D77 Neo-Grünfeld Defense: Classical Variation, Modern Defense
- D77 Neo-Grünfeld Defense: Classical Variation, Polgar Variation
- D78 Neo-Grünfeld Defense: Classical Variation, Original Defense
- D79 Neo-Grünfeld Defense: Ultra-Delayed Exchange Variation
- D80 Grünfeld Defense
- D80 Grünfeld Defense: Gibbon Gambit
- D80 Grünfeld Defense: Lundin Variation
- D80 Grünfeld Defense: Lutikov Variation
- D80 Grünfeld Defense: Lutikov Variation, Murrey Attack
- D80 Grünfeld Defense: Stockholm Variation
- D80 Grünfeld Defense: Zaitsev Gambit
- D81 Grünfeld Defense: Russian Variation, Accelerated Variation
- D82 Grünfeld Defense: Brinckmann Attack
- D83 Grünfeld Defense: Brinckmann Attack, Grünfeld Gambit
- D83 Grünfeld Defense: Brinckmann Attack, Grünfeld Gambit, Botvinnik Variation
- D83 Grünfeld Defense: Brinckmann Attack, Grünfeld Gambit, Capablanca Variation
- D83 Grünfeld Defense: Brinckmann Attack, Reshevsky Gambit
- D84 Grünfeld Defense: Brinckmann Attack, Grünfeld Gambit Accepted
- D85 Grünfeld Defense: Exchange Variation
- D85 Grünfeld Defense: Exchange Variation, Modern Exchange Variation
- D85 Grünfeld Defense: Exchange Variation, Modern Exchange Variation
- D85 Grünfeld Defense: Exchange Variation, Modern Exchange Variation
- D85 Grünfeld Defense: Exchange Variation, Modern Exchange Variation, Kramnik's Line
- D85 Grünfeld Defense: Exchange Variation, Modern Exchange Variation, Pawn Grab Line
- D85 Grünfeld Defense: Exchange Variation, Nadanian Attack
- D86 Grünfeld Defense: Exchange Variation, Classical Variation
- D86 Grünfeld Defense: Exchange Variation, Larsen Variation
- D86 Grünfeld Defense: Exchange Variation, Larsen Variation
- D86 Grünfeld Defense: Exchange Variation, Simagin's Improved Variation
- D86 Grünfeld Defense: Exchange Variation, Simagin's Lesser Variation
- D87 Grünfeld Defense: Exchange Variation, Seville Variation
- D87 Grünfeld Defense: Exchange Variation, Spassky Variation
- D88 Grünfeld Defense: Exchange Variation, Spassky Variation
- D89 Grünfeld Defense: Exchange Variation, Sokolsky Variation
- D89 Grünfeld Defense: Exchange Variation, Spassky Variation
- D90 Grünfeld Defense: Flohr Variation
- D90 Grünfeld Defense: Three Knights Variation
- D90 Grünfeld Defense: Three Knights Variation
- D91 Grünfeld Defense: Three Knights Variation, Petrosian System
- D92 Grünfeld Defense: Three Knights Variation, Hungarian Attack
- D93 Grünfeld Defense: Three Knights Variation, Hungarian Variation
- D94 Grünfeld Defense: Flohr Defense
- D94 Grünfeld Defense: Makogonov Variation
- D94 Grünfeld Defense: Opocensky Variation
- D94 Grünfeld Defense: Smyslov Defense
- D94 Grünfeld Defense: Three Knights Variation, Burille Variation
- D94 Grünfeld Defense: Three Knights Variation, Paris Variation
- D95 Grünfeld Defense: Botvinnik Variation
- D95 Grünfeld Defense: Pachman Variation
- D95 Grünfeld Defense: Three Knights Variation, Vienna Variation
- D96 Grünfeld Defense: Russian Variation
- D97 Grünfeld Defense: Russian Variation
- D97 Grünfeld Defense: Russian Variation, Byrne Variation
- D97 Grünfeld Defense: Russian Variation, Hungarian Variation
- D97 Grünfeld Defense: Russian Variation, Levenfish Variation
- D97 Grünfeld Defense: Russian Variation, Prins Variation
- D97 Grünfeld Defense: Russian Variation, Szabo Variation
- D98 Grünfeld Defense: Russian Variation, Keres Variation
- D98 Grünfeld Defense: Russian Variation, Smyslov Variation
- D99 Grünfeld Defense: Russian Variation, Smyslov Variation
- D99 Grünfeld Defense: Russian Variation, Yugoslav Variation
E — Indian Defences (354)
- E00 Catalan Opening
- E00 Catalan Opening
- E00 Catalan Opening: Hungarian Gambit
- E00 Indian Defense
- E00 Indian Defense: Devin Gambit
- E00 Indian Defense: Seirawan Attack
- E01 Catalan Opening: Closed
- E02 Catalan Opening: Open Defense
- E03 Catalan Opening: Open Defense
- E03 Catalan Opening: Open Defense, Alekhine Variation
- E04 Catalan Opening: Open Defense
- E04 Catalan Opening: Open Defense
- E04 Catalan Opening: Open Defense, Modern Sharp Variation
- E05 Catalan Opening: Open Defense, Classical Line
- E05 Catalan Opening: Open Defense, Classical Line
- E06 Catalan Opening: Closed
- E06 Catalan Opening: Closed
- E06 Catalan Opening: Closed
- E07 Catalan Opening: Closed
- E07 Catalan Opening: Closed, Botvinnik Variation
- E08 Catalan Opening: Closed
- E08 Catalan Opening: Closed
- E08 Catalan Opening: Closed
- E08 Catalan Opening: Closed
- E08 Catalan Opening: Closed
- E08 Catalan Opening: Closed, Spassky Gambit
- E08 Catalan Opening: Closed, Zagoryansky Variation
- E09 Catalan Opening: Closed Variation, Rabinovich Variation
- E09 Catalan Opening: Closed Variation, Traditional Variation
- E09 Catalan Opening: Closed, Main Line
- E09 Catalan Opening: Closed, Main Line
- E09 Catalan Opening: Closed, Main Line
- E09 Catalan Opening: Closed, Sokolsky Variation
- E10 Blumenfeld Countergambit
- E10 Blumenfeld Countergambit Accepted
- E10 Blumenfeld Countergambit: Duz-Khotimirsky Variation
- E10 Blumenfeld Countergambit: Spielmann Variation
- E10 Indian Defense: Anti-Nimzo-Indian
- E10 Indian Defense: Döry Indian
- E10 Indian Defense: Dzindzi-Indian Defense
- E11 Bogo-Indian Defense
- E11 Bogo-Indian Defense: Exchange Variation
- E11 Bogo-Indian Defense: Grünfeld Variation
- E11 Bogo-Indian Defense: Haiti Variation
- E11 Bogo-Indian Defense: Monticelli Trap
- E11 Bogo-Indian Defense: New England Variation
- E11 Bogo-Indian Defense: Nimzowitsch Variation
- E11 Bogo-Indian Defense: Retreat Variation
- E11 Bogo-Indian Defense: Retreat Variation
- E11 Bogo-Indian Defense: Retreat Variation
- E11 Bogo-Indian Defense: Retreat Variation
- E11 Bogo-Indian Defense: Retreat Variation
- E11 Bogo-Indian Defense: Retreat Variation
- E11 Bogo-Indian Defense: Retreat Variation
- E11 Bogo-Indian Defense: Retreat Variation
- E11 Bogo-Indian Defense: Retreat Variation
- E11 Bogo-Indian Defense: Retreat Variation
- E11 Bogo-Indian Defense: Retreat Variation
- E11 Bogo-Indian Defense: Retreat Variation
- E11 Bogo-Indian Defense: Vitolins Variation
- E11 Bogo-Indian Defense: Wade-Smyslov Variation
- E12 Queen's Indian Defense
- E12 Queen's Indian Defense: Kasparov Variation
- E12 Queen's Indian Defense: Kasparov Variation, Botvinnik Attack
- E12 Queen's Indian Defense: Kasparov-Petrosian Variation
- E12 Queen's Indian Defense: Kasparov-Petrosian Variation, Andersson Variation
- E12 Queen's Indian Defense: Kasparov-Petrosian Variation, Classical Variation
- E12 Queen's Indian Defense: Kasparov-Petrosian Variation, Hedgehog Variation
- E12 Queen's Indian Defense: Kasparov-Petrosian Variation, Kasparov Attack
- E12 Queen's Indian Defense: Kasparov-Petrosian Variation, Main Line
- E12 Queen's Indian Defense: Kasparov-Petrosian Variation, Marco Defense
- E12 Queen's Indian Defense: Kasparov-Petrosian Variation, Modern Variation
- E12 Queen's Indian Defense: Kasparov-Petrosian Variation, Petrosian Attack
- E12 Queen's Indian Defense: Kasparov-Petrosian Variation, Polovodin Gambit
- E12 Queen's Indian Defense: Kasparov-Petrosian Variation, Rashkovsky Attack
- E12 Queen's Indian Defense: Kasparov-Petrosian Variation, Romanishin Attack
- E12 Queen's Indian Defense: Miles Variation
- E12 Queen's Indian Defense: Petrosian Variation
- E12 Queen's Indian Defense: Petrosian Variation, Farago Defense
- E13 Queen's Indian Defense: Kasparov Variation
- E14 Queen's Indian Defense, with e3
- E14 Queen's Indian Defense, with e3
- E14 Queen's Indian Defense, with e3
- E14 Queen's Indian Defense, with e3
- E14 Queen's Indian Defense, with e3
- E14 Queen's Indian Defense, with e3
- E14 Queen's Indian Defense, with e3
- E14 Queen's Indian Defense, with e3
- E14 Queen's Indian Defense, with e3
- E14 Queen's Indian Defense, with e3
- E14 Queen's Indian Defense, with e3
- E14 Queen's Indian Defense, with e3
- E14 Queen's Indian Defense, with e3
- E14 Queen's Indian Defense, with e3
- E14 Queen's Indian Defense, with e3, Bb4+ Line
- E14 Queen's Indian Defense: Averbakh Variation
- E14 Queen's Indian Defense: Spassky System
- E14 Queen's Indian Defense: Spassky System
- E14 Queen's Indian Defense: Spassky System
- E14 Queen's Indian Defense: Spassky System
- E14 Queen's Indian Defense: Spassky System3
- E14 Queen's Indian Defense: Spassky System3
- E15 Queen's Indian Defense: Buerger Variation
- E15 Queen's Indian Defense: Fianchetto Variation
- E15 Queen's Indian Defense: Fianchetto Variation, Check Variation
- E15 Queen's Indian Defense: Fianchetto Variation, Check Variation, Intermezzo Line
- E15 Queen's Indian Defense: Fianchetto Variation, Check Variation, Modern Line
- E15 Queen's Indian Defense: Fianchetto Variation, Nimzowitsch Variation
- E15 Queen's Indian Defense: Fianchetto Variation, Nimzowitsch Variation, Nimzowitsch Attack
- E15 Queen's Indian Defense: Fianchetto Variation, Nimzowitsch Variation, Quiet Line
- E15 Queen's Indian Defense: Fianchetto Variation, Nimzowitsch Variation, Timman's Line
- E15 Queen's Indian Defense: Fianchetto Variation, Rubinstein Variation
- E15 Queen's Indian Defense: Fianchetto Variation, Sämisch Variation
- E15 Queen's Indian Defense: Fianchetto Variation, Traditional Line
- E16 Queen's Indian Defense: Capablanca Variation
- E16 Queen's Indian Defense: Riumin Variation
- E16 Queen's Indian Defense: Yates Variation
- E17 Queen's Indian Defense: Anti-Queen's Indian System
- E17 Queen's Indian Defense: Classical Variation
- E17 Queen's Indian Defense: Classical Variation, Polugaevsky Gambit
- E17 Queen's Indian Defense: Classical Variation, Taimanov Gambit
- E17 Queen's Indian Defense: Euwe Variation
- E17 Queen's Indian Defense: Fianchetto Variation, Kramnik Variation
- E17 Queen's Indian Defense: Opocensky Variation
- E17 Queen's Indian Defense: Traditional Variation
- E18 Queen's Indian Defense: Classical Variation, Tiviakov Defense
- E18 Queen's Indian Defense: Classical Variation, Traditional Variation
- E18 Queen's Indian Defense: Classical Variation, Traditional Variation, Nimzowitsch Line
- E19 Queen's Indian Defense: Classical Variation, Traditional Variation, Main Line
- E20 Nimzo-Indian Defense
- E20 Nimzo-Indian Defense: Dilworth Gambit
- E20 Nimzo-Indian Defense: Kmoch Variation
- E20 Nimzo-Indian Defense: Mikenas Attack
- E20 Nimzo-Indian Defense: Romanishin Variation
- E20 Nimzo-Indian Defense: Romanishin Variation
- E20 Nimzo-Indian Defense: Romanishin Variation, English Hybrid
- E21 Nimzo-Indian Defense: Three Knights Variation
- E21 Nimzo-Indian Defense: Three Knights Variation, Euwe Variation
- E21 Nimzo-Indian Defense: Three Knights Variation, Korchnoi Variation
- E21 Nimzo-Indian Defense: Three Knights Variation, Shocron Gambit
- E22 Nimzo-Indian Defense: Spielmann Variation
- E23 Nimzo-Indian Defense: Spielmann Variation, Carlsbad Variation
- E23 Nimzo-Indian Defense: Spielmann Variation, Romanovsky Gambit
- E23 Nimzo-Indian Defense: Spielmann Variation, Stahlberg Variation
- E23 Nimzo-Indian Defense: Spielmann Variation, Stahlberg Variation
- E24 Nimzo-Indian Defense: Sämisch Variation
- E24 Nimzo-Indian Defense: Sämisch Variation, Botvinnik Variation
- E25 Nimzo-Indian Defense: Sämisch Variation
- E25 Nimzo-Indian Defense: Sämisch Variation, Keres Variation
- E25 Nimzo-Indian Defense: Sämisch Variation, Romanovsky Variation
- E26 Nimzo-Indian Defense: Sämisch Variation
- E26 Nimzo-Indian Defense: Sämisch Variation, O'Kelly Variation
- E27 Nimzo-Indian Defense: Sämisch Variation
- E28 Nimzo-Indian Defense: Sämisch Variation
- E29 Nimzo-Indian Defense: Sämisch Variation
- E29 Nimzo-Indian Defense: Sämisch Variation, Capablanca Variation
- E30 Nimzo-Indian Defense: Leningrad Variation
- E30 Nimzo-Indian Defense: Leningrad Variation, Averbakh Gambit
- E31 Nimzo-Indian Defense: Leningrad Variation, Benoni Defense
- E32 Nimzo-Indian Defense: Classical Variation
- E32 Nimzo-Indian Defense: Classical Variation, Keres Defense
- E32 Nimzo-Indian Defense: Classical Variation, Vitolins-Adorjan Gambit
- E33 Nimzo-Indian Defense: Classical Variation, Milner-Barry Variation
- E33 Nimzo-Indian Defense: Classical Variation, Zurich Variation
- E34 Nimzo-Indian Defense: Classical Variation, Belyavsky Gambit
- E34 Nimzo-Indian Defense: Classical Variation, Noa Variation
- E35 Nimzo-Indian Defense: Classical Variation, Noa Variation
- E36 Nimzo-Indian Defense: Classical Variation, Noa Variation
- E36 Nimzo-Indian Defense: Classical Variation, Noa Variation, Botvinnik Variation
- E36 Nimzo-Indian Defense: Classical Variation, Noa Variation, Main Line
- E36 Nimzo-Indian Defense: Classical Variation, Romanishin Gambit
- E37 Nimzo-Indian Defense: Classical Variation, Modern Variation
- E37 Nimzo-Indian Defense: Classical Variation, Noa Variation
- E37 Nimzo-Indian Defense: Classical Variation, Noa Variation, San Remo Variation
- E38 Nimzo-Indian Defense: Classical Variation, Berlin Variation
- E38 Nimzo-Indian Defense: Classical Variation, Berlin Variation
- E38 Nimzo-Indian Defense: Classical Variation, Berlin Variation, Steiner Variation
- E39 Nimzo-Indian Defense: Classical Variation, Berlin Variation, Macieja System
- E39 Nimzo-Indian Defense: Classical Variation, Berlin Variation, Pirc Variation
- E40 Nimzo-Indian Defense: Rubinstein System
- E40 Nimzo-Indian Defense: Rubinstein System, Taimanov Variation
- E41 Nimzo-Indian Defense: Rubinstein System
- E41 Nimzo-Indian Defense: Rubinstein System, Hübner Variation
- E41 Nimzo-Indian Defense: Rubinstein System, Hübner Variation
- E42 Nimzo-Indian Defense: Rubinstein System, Rubinstein Variation
- E42 Nimzo-Indian Defense: Rubinstein System, Rubinstein Variation, Main Line
- E42 Nimzo-Indian Defense: Rubinstein System, Rubinstein Variation, Sherbakov Attack
- E43 Nimzo-Indian Defense: St. Petersburg Variation
- E43 Nimzo-Indian Defense: St. Petersburg Variation
- E43 Nimzo-Indian Defense: St. Petersburg Variation
- E43 Nimzo-Indian Defense: St. Petersburg Variation
- E43 Nimzo-Indian Defense: St. Petersburg Variation
- E43 Nimzo-Indian Defense: St. Petersburg Variation
- E43 Nimzo-Indian Defense: St. Petersburg Variation
- E43 Nimzo-Indian Defense: St. Petersburg Variation
- E43 Nimzo-Indian Defense: St. Petersburg Variation
- E43 Nimzo-Indian Defense: St. Petersburg Variation
- E43 Nimzo-Indian Defense: St. Petersburg Variation
- E43 Nimzo-Indian Defense: St. Petersburg Variation, with Ne4
- E44 Nimzo-Indian Defense: St. Petersburg Variation
- E44 Nimzo-Indian Defense: St. Petersburg Variation, American Variation
- E44 Nimzo-Indian Defense: St. Petersburg Variation, Romanishin-Psakhis Variation
- E45 Nimzo-Indian Defense: St. Petersburg Variation, Fischer Variation
- E46 Nimzo-Indian Defense: Normal Variation
- E46 Nimzo-Indian Defense: Reshevsky Variation
- E46 Nimzo-Indian Defense: Simagin Variation
- E47 Nimzo-Indian Defense: Normal Variation
- E48 Nimzo-Indian Defense: Normal Variation, Classical Defense
- E48 Nimzo-Indian Defense: Ragozin Defense
- E49 Nimzo-Indian Defense: Normal Variation, Botvinnik System
- E50 Nimzo-Indian Defense
- E51 Nimzo-Indian Defense: Normal Variation, Ragozin Variation
- E51 Nimzo-Indian Defense: Normal Variation, Sämisch Deferred
- E51 Nimzo-Indian Defense: Ragozin Variation
- E52 Nimzo-Indian Defense: Normal Variation, Schlechter Defense
- E52 Nimzo-Indian Defense: Normal Variation, Schlechter Defense
- E53 Nimzo-Indian Defense: Normal Variation, Gligoric System
- E53 Nimzo-Indian Defense: Normal Variation, Gligoric System
- E53 Nimzo-Indian Defense: Normal Variation, Gligoric System, Keres Variation
- E54 Nimzo-Indian Defense: Normal Variation, Gligoric System, Exchange Variation
- E54 Nimzo-Indian Defense: Normal Variation, Gligoric System, Smyslov Variation
- E55 Nimzo-Indian Defense: Normal Variation, Gligoric System, Bronstein Variation
- E56 Nimzo-Indian Defense: Normal Variation, Gligoric System, Bernstein Defense
- E57 Nimzo-Indian Defense: Normal Variation, Gligoric System, Bernstein Defense
- E58 Nimzo-Indian Defense: Normal Variation, Bernstein Defense, Exchange Line
- E59 Nimzo-Indian Defense: Normal Variation, Bernstein Defense
- E59 Nimzo-Indian Defense: Normal Variation, Bernstein Defense
- E60 Grünfeld Defense: Counterthrust Variation
- E60 Indian Defense: Anti-Grünfeld, Adorjan Gambit
- E60 Indian Defense: Anti-Grünfeld, Advance Variation
- E60 Indian Defense: Anti-Grünfeld, Alekhine Variation
- E60 Indian Defense: Anti-Grünfeld, Alekhine Variation, Leko Gambit
- E60 Indian Defense: Anti-Grünfeld, Basman-Williams Attack
- E60 Indian Defense: West Indian Defense
- E60 King's Indian Defense: Fianchetto Variation
- E60 King's Indian Defense: Fianchetto Variation, Immediate Fianchetto
- E60 King's Indian Defense: Normal Variation, King's Knight Variation
- E60 King's Indian Defense: Santasiere Variation
- E60 King's Indian Defense: Semi-Classical Variation, Benoni Variation
- E60 King's Indian Defense: Semi-Classical Variation, Hollywood Variation
- E60 Queen's Pawn, Mengarini Attack
- E61 King's Indian Defense
- E61 King's Indian Defense: Fianchetto Variation, Benjamin Defense
- E61 King's Indian Defense: Semi-Classical Variation
- E61 King's Indian Defense: Semi-Classical Variation, Exchange Variation
- E61 King's Indian Defense: Semi-Classical Variation, Queenside Storm Line
- E61 King's Indian Defense: Smyslov Variation
- E62 King's Indian Defense: Fianchetto Variation, Carlsbad Variation
- E62 King's Indian Defense: Fianchetto Variation, Delayed Fianchetto
- E62 King's Indian Defense: Fianchetto Variation, Kavalek Defense
- E62 King's Indian Defense: Fianchetto Variation, Larsen Defense
- E62 King's Indian Defense: Fianchetto Variation, Lesser Simagin (Spassky)
- E62 King's Indian Defense: Fianchetto Variation, Simagin Variation
- E62 King's Indian Defense: Fianchetto Variation, Uhlmann-Szabo System
- E63 King's Indian Defense: Fianchetto Variation, Panno Variation
- E63 King's Indian Defense: Fianchetto Variation, Panno Variation, Blockade Line
- E63 King's Indian Defense: Fianchetto Variation, Panno Variation, Donner Line
- E63 King's Indian Defense: Fianchetto Variation, Panno Variation, Korchnoi Line
- E64 King's Indian Defense: Fianchetto Variation, Double Fianchetto Attack
- E64 King's Indian Defense: Fianchetto Variation, Hungarian Variation
- E64 King's Indian Defense: Fianchetto Variation, Pterodactyl Variation
- E64 King's Indian Defense: Fianchetto Variation, Yugoslav System
- E64 King's Indian Defense: Fianchetto Variation, Yugoslav Variation, Rare Line
- E65 King's Indian Defense: Fianchetto Variation, Yugoslav Variation
- E65 King's Indian Defense: Fianchetto Variation, Yugoslav Variation, Exchange Line
- E66 King's Indian Defense: Fianchetto Variation, Yugoslav Variation, Advance Line
- E67 King's Indian Defense: Fianchetto Variation, Classical Fianchetto
- E67 King's Indian Defense: Fianchetto Variation, Debrecen Defense
- E68 King's Indian Defense: Fianchetto Variation, Classical Variation
- E68 King's Indian Defense: Fianchetto Variation, Long Variation
- E69 King's Indian Defense: Fianchetto Variation, Classical Main Line
- E70 King's Indian Defense: Accelerated Averbakh Variation
- E70 King's Indian Defense: Kramer Variation
- E70 King's Indian Defense: Normal Variation
- E70 King's Indian Defense: Normal Variation
- E71 King's Indian Defense: Karpov System
- E71 King's Indian Defense: Makogonov Variation
- E72 King's Indian Defense: Normal Variation, Deferred Fianchetto
- E72 King's Indian Defense: Pomar System
- E73 King's Indian Defense: Averbakh Variation
- E73 King's Indian Defense: Averbakh Variation, Flexible Defense
- E73 King's Indian Defense: Averbakh Variation, Geller Defense
- E73 King's Indian Defense: Averbakh Variation, Modern Defense
- E73 King's Indian Defense: Averbakh Variation, Modern Defense, Burgess Line
- E73 King's Indian Defense: Averbakh Variation, Nc6 Defense
- E73 King's Indian Defense: Averbakh Variation, Spanish Defense
- E73 King's Indian Defense: Normal Variation, Standard Development
- E73 King's Indian Defense: Semi-Averbakh System
- E74 King's Indian Defense: Averbakh Variation, Benoni Defense
- E74 King's Indian Defense: Averbakh Variation, Benoni Defense, Advance Variation
- E74 King's Indian Defense: Averbakh Variation, Benoni Defense, Exchange Variation
- E75 King's Indian Defense: Averbakh Variation, Main Line
- E76 King's Indian Defense: Four Pawns Attack
- E76 King's Indian Defense: Four Pawns Attack, Dynamic Attack
- E76 King's Indian Defense: Four Pawns Attack, Modern Defense
- E77 King's Indian Defense: Four Pawns Attack
- E77 King's Indian Defense: Four Pawns Attack, Florentine Gambit
- E77 King's Indian Defense: Four Pawns Attack, Normal Attack
- E77 King's Indian Defense: Six Pawns Attack
- E78 King's Indian Defense: Four Pawns Attack, Fluid Attack
- E79 King's Indian Defense: Four Pawns Attack, Exchange Variation
- E80 King's Indian Defense: Sämisch Variation
- E81 King's Indian Defense: Sämisch Variation, Bobotsov-Korchnoi-Petrosian Variation
- E81 King's Indian Defense: Sämisch Variation, Byrne Defense
- E81 King's Indian Defense: Sämisch Variation, Normal Defense
- E81 King's Indian Defense: Sämisch Variation, Sämisch Gambit
- E81 King's Indian Defense: Sämisch Variation, Sämisch Gambit Accepted
- E81 King's Indian Defense: Steiner Attack
- E81 King's Indian Defense: Steiner Attack
- E81 King's Indian Defense: Steiner Attack
- E81 King's Indian Defense: Steiner Attack
- E82 King's Indian Defense: Sämisch Variation, Double Fianchetto
- E83 King's Indian Defense: Sämisch Variation, Panno Formation
- E83 King's Indian Defense: Sämisch Variation, Ruban Variation
- E83 King's Indian Defense: Sämisch Variation, Yates Defense
- E84 King's Indian Defense: Sämisch Variation, Panno Main Line
- E85 King's Indian Defense: Sämisch Variation, Orthodox Variation
- E86 King's Indian Defense: Sämisch Variation
- E87 King's Indian Defense: Sämisch Variation, Bronstein Defense
- E87 King's Indian Defense: Sämisch Variation, Closed Variation
- E87 King's Indian Defense: Sämisch Variation, Orthodox Variation, Bronstein Variation
- E88 King's Indian Defense: Sämisch Variation, Closed Variation
- E89 King's Indian Defense: Sämisch Variation, Closed Variation, Main Line
- E90 King's Indian Defense: Larsen Variation
- E90 King's Indian Defense: Normal Variation, Rare Defenses
- E90 King's Indian Defense: Zinnowitz Variation
- E91 King's Indian Defense: Kazakh Variation
- E91 King's Indian Defense: Orthodox Variation
- E92 King's Indian Defense: Exchange Variation
- E92 King's Indian Defense: Orthodox Variation
- E92 King's Indian Defense: Orthodox Variation, Gligoric-Taimanov System
- E92 King's Indian Defense: Petrosian Variation
- E92 King's Indian Defense: Petrosian Variation, Stein Defense
- E93 King's Indian Defense: Petrosian Variation, Keres Defense
- E93 King's Indian Defense: Petrosian Variation, Normal Defense
- E94 King's Indian Defense: Orthodox Variation
- E94 King's Indian Defense: Orthodox Variation, Donner Defense
- E94 King's Indian Defense: Orthodox Variation, Glek Defense
- E94 King's Indian Defense: Orthodox Variation, Positional Defense
- E94 King's Indian Defense: Orthodox Variation, Positional Defense, Closed Line
- E94 King's Indian Defense: Orthodox Variation, Ukrainian Defense
- E95 King's Indian Defense: Orthodox Variation
- E96 King's Indian Defense: Orthodox Variation, Positional Defense, Main Line
- E97 King's Indian Defense: Orthodox Variation, Aronin-Taimanov Defense
- E97 King's Indian Defense: Orthodox Variation, Bayonet Attack
- E97 King's Indian Defense: Orthodox Variation, Bayonet Attack, Sokolov's Line
- E97 King's Indian Defense: Orthodox Variation, Bayonet Attack, Yepishin's Line
- E97 King's Indian Defense: Orthodox Variation, Korchnoi Attack
- E97 King's Indian Defense: Orthodox Variation, Modern System
- E98 King's Indian Defense: Orthodox Variation, Classical System
- E98 King's Indian Defense: Orthodox Variation, Classical System, Kozul Gambit
- E98 King's Indian Defense: Orthodox Variation, Classical System, Neo-Classical Line
- E99 King's Indian Defense: Orthodox Variation, Classical System, Benko Attack
- E99 King's Indian Defense: Orthodox Variation, Classical System, Traditional Line