Complete reference · ECO A

All ECO A Opening Lines

Flank openings (1.c4, 1.Nf3, irregular). These 805 exact named entries form the move-order reference layer. Open any line for its moves, board position, immediate orientation, and related references; use the linked family guide for the deeper strategic lesson.

• 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: Outflank Variation, Schuehler Gambit
• 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: 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
• 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, Capablanca Variation
• A12 · Réti Opening: Anglo-Slav Variation, Capablanca Variation
• A12 · Réti Opening: Anglo-Slav Variation, London Defensive System
• A12 · Réti Opening: Anglo-Slav Variation, London Defensive System
• A12 · Réti Opening: Anglo-Slav Variation, London Defensive System
• A12 · Réti Opening: Anglo-Slav Variation, London Defensive System
• A12 · Réti Opening: Anglo-Slav Variation, New York System
• A12 · Réti Opening: Anglo-Slav Variation, New York System
• A12 · Réti Opening: Anglo-Slav Variation, New York System
• A12 · Réti Opening: Anglo-Slav Variation, Torre System
• A12 · Réti Opening: Anglo-Slav Variation, Torre System
• A12 · Réti Opening: Anglo-Slav Variation, Torre 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 Gambit
• A51 · Indian Defense: Budapest Gambit Accepted
• A51 · Indian Defense: Budapest Gambit Accepted, Fajarowicz Defense
• A51 · Indian Defense: Budapest Gambit Accepted, Fajarowicz Defense, Bonsdorf Variation
• A51 · Indian Defense: Budapest Gambit Accepted, Fajarowicz Defense, Steiner Variation
• A52 · Indian Defense: Budapest Gambit Accepted, Main Line
• A52 · Indian Defense: Budapest Gambit Accepted, Main Line, Adler Variation
• A52 · Indian Defense: Budapest Gambit Accepted, Main Line, Alekhine Variation
• A52 · Indian Defense: Budapest Gambit Accepted, Main Line, Alekhine Variation, Abonyi Variation
• A52 · Indian Defense: Budapest Gambit Accepted, Main Line, Alekhine Variation, Tartakower Defense
• A52 · Indian Defense: Budapest Gambit Accepted, Main Line, 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