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Home » Chess Resources and Tools » ECO Codes Table (Encyclopaedia of Chess Openings)

ECO Codes Table (Encyclopaedia of Chess Openings)

Editorial Staff by Editorial Staff
in Chess Resources and Tools

ECO, which stands for Encyclopaedia of Chess Openings, is a classification system for Chess openings. Each opening is given an ECO code to represent that opening and the moves of that opening.

The ECO was originally published in 1974 by a Serbian company called Chess Informant. [1]

Below is the ECO table containing all of the ECO codes for every Chess opening.

 

ECO Opening Notation Moves
A00 Anderssen’s Opening 1. a3
A00 Polish Gambit, Anderssen’s Opening 1. a3 a5 2. b4
A00 Creepy Crawly Formation 1. a3 e5 2. h3 d5
A00 Andersspike 1. a3 g6 2. g4
A00 Ware; Meadow Hay; Crab 1. a4
A00 Wing Gambit, Ware Opening 1. a4 b5
A00 Cologne Gambit, Ware Opening a4 b6 d4 d5 Nc3 Nd7
A00 Ware Gambit a4 e5 a5 d5 e3 f5 a6
A00 Polish; Orangutan; Sokolsky; Hunt b4
A00 Birmingham Gambit, Polish b4 c5
A00 Outflank Variation, Polish b4 c6
A00 Schuhler Gambit, Polish b4 c6 Bb2 a5 b5 cxb5 e4
A00 Myers Variation, Polish b4 d5 Bb2 c6 a4
A00 Bugayev Attack, Polish b4 e5 a3
A00 Wolferts Gambit, Polish b4 e5 Bb2 c5
A00 Schiffler-Sokolsky; Tartakower Gambit b4 e5 Bb2 f6 e4 Bxb4
A00 Brinckmann Variation, Polish b4 e5 Bb2 f6 e4 Bxb4 Bc4 Nc6 f4 Qe7 f5 g6
A00 Bucker Defense, Polish b4 Na6
A00 Grigorian Variation, Polish b4 Nc6
A00 Polish Spike b4 Nf6 Bb2 g6 g4
A00 Karniewski; Tubingen Variation, Polish b4 Nh6
A00 Saragossa; Hempel’s Opening c3
A00 Hanham; Hayward c3 e5 Qc2
A00 Mieses; Valencia; Venezuelan Opening d3
A00 Venezolana d3 c5 Nc3 Nc6 g3
A00 Reversed Rat d3 e5
A00 Spike Deferred; Myers Spike Attack d3 g6 g4
A00 Keoni-Hiva Gambit e3 d5 Nc3 Nf6 a3 e5 f4 exf4 Nf3
A00 Van’t Kruijs Opening e3 e5
A00 Bouncing Bishop Variation e3 e5 Bc4 b5 Bb3
A00 Amsterdam Attack e3 e5 c4 d6 Nc3 Nc6 b3 Nf6
A00 Ekolu Variation e3 e5 Nc3 d5 f4 exf4 Nf3
A00 Alua Variation e3 e5 Nc3 Nc6 f4 exf4 Nf3
A00 Akahi Variation e3 e5 Nc3 Nf6 f4 exf4 Nf3
A00 Barnes; Gedult-Gunderam; Walkerling f3
A00 King’s Head Opening f3 e5 e4
A00 Hammerschlag; Pork Chop Opening f3 e5 Kf2
A00 Benko; Barczay; Bilek; Hungarian g3
A00 Gambit 59 g3 d5 Bg2 e5 b4
A00 Regan Variation g3 d5 Bg2 e5 d4
A00 Reversed Alekhine g3 e5 Nf3
A00 Lasker Simul Special g3 h5
A00 Grob; Ahlhausen; Colibri; Fric; Genoa; Spike g4
A00 Grob Gambit g4 d5 Bg2 Bxg4
A00 Romford Counter-Gambit, Grob g4 d5 Bg2 Bxg4 c4 d4
A00 Spike, Grob g4 d5 Bg2 c6 g5
A00 Short Spike, Grob g4 d5 Bg2 c6 h3
A00 Zilbermints Gambit, Grob g4 d5 e4
A00 Keene Defense, Grob g4 d5 h3 e5
A00 Hurst Attack, Grob g4 e5 Bg2 d5 c4
A00 Alessi Gambit, Grob g4 f5
A00 Double Grob g4 g5
A00 Spike Deferred g4 g6 d3
A00 Bucker Defense, Grob g4 Nh6
A00 Clemenz Opening h3
A00 Kadas Opening h4
A00 Despres Opening h4
A00 Koola-Koola h4 a5
A00 Wulumulu h4 e5 d4
A00 Durkin’s Opening; Sodium Attack Na3
A00 Dunst; Heinrichsen; Will Bull; Kotrc Nc3
A00 St. George Defense, Dunst Nc3 a6
A00 Novosibirsk Variation, Dunst Nc3 c5 d4 cxd4 Qxd4 Nc6 Qh4
A00 Twyble Attack, Dunst Nc3 c5 Rb1
A00 Dunst Gambit Nc3 d5 e4 dxe4 d3
A00 Pseudo-Diemer Gambit, Dunst Nc3 d5 e4 dxe4 f3 exf3 Qxf3
A00 Amazon, Dunst Nc3 d5 e4 dxe4 Nxe4 Qd5
A00 Reversed Nimzovich Nc3 e5
A00 Battambang, Dunst Nc3 e5 a3
A00 Irish Attack; Polish Attack Nc3 e5 f4
A00 Napoleon Attack, Dunst Nc3 e5 Nf3
A00 Glasscoe Gambit, Dunst Nc3 f5 g4
A00 Anti-Pirc Variation, Dunst Nc3 g6 h4
A00 Tubingen Gambit, Dunst Nc3 Nf6 g4
A00 Amar; Paris Opening Nh3
A00 Drunken Knight Opening Nh3
A00 Krazy Kat Nh3 e5 f3 d5 Nf2
A01 Larsen; Queen’s Fianchetto; Nimzo-Larsen Attack A01 b3
A01 Symmetrical Variation, Larsen b3 b6
A01 English Variation, Larsen b3 c5
A01 Classical Variation, Larsen b3 d5
A01 Modern Variation, Larsen b3 e5
A01 Ringelbach Gambit, Larsen b3 e5 Bb2 f5 e4
A01 Paschmann Gambit, Larsen b3 e5 Bb2 Nc6 f4
A01 Dutch Variation, Larsen b3 f5
A01 Indian Variation, Larsen b3 Nf6
A01 Spike Variation, Larsen b3 Nf6 Bb2 g6 g4
A10 English Opening; A10 c4
A10 Halibut Gambit, English c4 b5
A40 Hartlaub Gambit, English c4 b6 d4 Bb7 Nc3 e6 e4 f5 exf5 Nf6
A30 Symmetrical Defense, English; A30 c4 c5
A30 Wing Variation, English c4 c5 b4
A34 Normal Variation, Symmetrical English; A34 c4 c5 Nc3
A35 Two Knights Variation, Symmetrical English; A35 c4 c5 Nc3 Nc6
A36 Fianchetto Variation, Symmetrical English; A36 c4 c5 Nc3 Nc6 g3
A36 Symmetrical Variation, Symmetrical English c4 c5 Nc3 Nc6 g3 g6 Bg2 Bg7
A36 Botvinnik System Reversed, Symmetrical English c4 c5 Nc3 Nc6 g3 g6 Bg2 Bg7 e3 e5
A36 Botvinnik Variation, Symmetrical English c4 c5 Nc3 Nc6 g3 g6 Bg2 Bg7 e4
A37 Two Knights Line, Symmetrical English; A37 c4 c5 Nc3 Nc6 g3 g6 Bg2 Bg7 Nf3
A38 Full Symmetry Line, Symmetrical English; A38 c4 c5 Nc3 Nc6 g3 g6 Bg2 Bg7 Nf3 Nf6
A38 Double Fianchetto, Symmetrical English c4 c5 Nc3 Nc6 g3 g6 Bg2 Bg7 Nf3 Nf6 O-O O-O b3
A38 Duchamp Variation, Symmetrical English c4 c5 Nc3 Nc6 g3 g6 Bg2 Bg7 Nf3 Nf6 O-O O-O d3
A39 Mecking Variation, Symmetrical English; A39 c4 c5 Nc3 Nc6 g3 g6 Bg2 Bg7 Nf3 Nf6 O-O O-O d4
A34 Fianchetto Variation, Symmetrical English c4 c5 Nc3 Nf6 g3
A34 Rubinstein Variation, Symmetrical English c4 c5 Nc3 Nf6 g3 d5 cxd5 Nxd5 Bg2 Nc7
A34 Asymmetrical Variation, English c4 c5 Nc3 Nf6 Nf3 d5 cxd5 Nxd5
A34 Keres-Parma System, English c4 c5 Nc3 Nf6 Nf3 e6 g3 Nc6
A34 Four Knights Variation, Symmetrical English c4 c5 Nc3 Nf6 Nf3 Nf6
A30 Napolitano Gambit, Symmetrical English c4 c5 Nf3 Nf6 b4
A31 Anti-Benoni Variation, Symmetrical English; A31 c4 c5 Nf3 Nf6 d4
A31 Two Knights Variation, English c4 c5 Nf3 Nf6 d4 cxd4 Nxd4
A32 Spielmann Defense, Symmetrical English; A32 c4 c5 Nf3 Nf6 d4 cxd4 Nxd4 e6
A33 A33 c4 c5 Nf3 Nf6 d4 cxd4 Nxd4 e6 Nc3 Nc6
A33 Geller Variation, Symmetrical English c4 c5 Nf3 Nf6 d4 cxd4 Nxd4 e6 Nc3 Nc6 g3 Qb6
A30 Hedgehog Variation, Symmetrical English c4 c5 Nf3 Nf6 g3 b6 Bg2 Bb7 O-O e6 Nc3 Be7
A30 Double Fianchetto Defense, English c4 c5 Nf3 Nf6 g3 b6 Bg2 Bb7 O-O g6
A11 Anglo-Slav, English; A11 c4 c6
A12 A12 c4 c6 Nf3 d5 b3
A12 Bled Variation, English c4 c6 Nf3 d5 b3 Nf6 g3 g6
A10 Anglo Scandanavian Defense, English c4 d5
A10 Loehn Gambit, English c4 d5 cxd5 e6
A10 Schulz Gambit, English c4 d5 cxd5 Nf6
A10 Malvinas Variation, English c4 d5 cxd5 Qxd5 Nc3 Qa5
A20 King’s English; A20 c4 e5
A20 Kahiko-Hula Gambit, English c4 e5 e3 Nf6 f4 exf4 Nf3
A20 Double Whammy, English c4 e5 f4
A20 Drill Variation, English c4 e5 g3 h5
A21 Reversed Sicilian, English; A21 c4 e5 Nc3
A21 Kramnik-Shirov Variation, English c4 e5 Nc3 Bb4
A21 Troger Variation, English c4 e5 Nc3 d6 g3 Be6 Bg2 Nc6
A21 Keres Defense, English c4 e5 Nc3 d6 g3 c6
A21 General Variation, King’s English c4 e5 Nc3 d6 Nf3
A21 Smyslov Variation, English c4 e5 Nc3 d6 Nf3 Bg4
A21 Anglo-Dutch c4 e5 Nc3 f5
A25 Reversed Closed Sicilian, English; A25 c4 e5 Nc3 Nc6
A25 Troger Variation, English c4 e5 Nc3 Nc6 g3 g6 Bg2 Be6
A25 Taimanov Variation, English c4 e5 Nc3 Nc6 g3 g6 Bg2 Bg7
A25 Hungarian Attack, English c4 e5 Nc3 Nc6 g3 g6 Bg2 Bg7 Rb1
A26 Closed System, King’s English; A26 c4 e5 Nc3 Nc6 g3 g6 Bg2 Bg7 d3
A25 Closed System, Full Symmetry, King’s English c4 e5 Nc3 Nc6 g3 g6 Bg2 Bg7 d3 d6
A25 Botvinnik System, King’s English c4 e5 Nc3 Nc6 g3 g6 Bg2 Bg7 d3 d6 e4
A25 Bremen-Hort Variation, English c4 e5 Nc3 Nc6 g3 g6 Bg2 Bg7 e3 d6 Nge2 Be6
A25 Botvinnik Variation, English c4 e5 Nc3 Nc6 g3 g6 Bg2 Bg7 e4
A27 Three Knights System, English; A27 c4 e5 Nc3 Nc6 Nf3
A28 Four Knights Variation, English; A28 c4 e5 Nc3 Nc6 Nf3 Nf6
A28 Korchnoi Line, English c4 e5 Nc3 Nc6 Nf3 Nf6 a3
A28 Flexible Line, English c4 e5 Nc3 Nc6 Nf3 Nf6 d3
A28 Bradley Beach Variation, English c4 e5 Nc3 Nc6 Nf3 Nf6 d4 e4
A28 Four Knights Variation, English c4 e5 Nc3 Nc6 Nf3 Nf6 d4 exd4 Nxd4Bb4 Bg5 h6 Bh4 Bxc3+ bxc3 Ne5
A28 Quiet Line, English c4 e5 Nc3 Nc6 Nf3 Nf6 e3
A28 Romanishin Variation, English c4 e5 Nc3 Nc6 Nf3 Nf6 e3 Bb4 Qc2 Bxc3
A28 Keene; Stean Variation, English c4 e5 Nc3 Nc6 Nf3 Nf6 e3 Bb4 Qc2 O-O Nd5 Re8 Qf5
A28 Botvinnik Line, English c4 e5 Nc3 Nc6 Nf3 Nf6 e4
A29 Fianchetto Line, Four Knights English; A29 c4 e5 Nc3 Nc6 Nf3 Nf6 g3
A22 Two Knights Variation, English; A22 c4 e5 Nc3 Nf6
A22 Mazedonisch Variation, English c4 e5 Nc3 Nf6 f4
A22 Bremen; Carls Variation, English c4 e5 Nc3 Nf6 g3
A22 Kapengut; Smyslov; Modern V, English c4 e5 Nc3 Nf6 g3 Bb4
A23 Keres Variation, English; A23 c4 e5 Nc3 Nf6 g3 c6
A23 Reversed Dragon, English c4 e5 Nc3 Nf6 g3 d5
A24 Fianchetto Lines, Two Knights Variation, English; A24 c4 e5 Nc3 Nf6 g3 g6
A24 Prickly Pawn Pass System, English c4 e5 Nc3 Nf6 g3 g6 Bg2 Bg7 d3 d6 e4 O-O Nge2 c6 O-O a6
A22 Bellon Gambit, English c4 e5 Nc3 Nf6 Nf3 e4 Ng5 b5
A22 Erbenheimer Gambit, English c4 e5 Nc3 Nf6 Nf3 e4 Ng5 Ng4
A20 Nimzovich Variation, English c4 e5 Nf3
A20 Nimzovich-Flohr Variation, English c4 e5 Nf3 e4
A20 English Queen c4 e5 Qa4
A13 Agincourt; Kurajica Defense, English; A13 c4 e6
A13 English Defense c4 e6 d4 b6
A13 King’s Knight Variation, English c4 e6 Nf3 d5
A13 Wimpy System, English c4 e6 Nf3 d5 b3 Nf6 Bb2 c5 e3
A13 Afincourt Variation, English c4 e6 Nf3 d5 g3
A13 Kurajica Defense, English c4 e6 Nf3 d5 g3 c6
A13 Neo Catalan, English c4 e6 Nf3 d5 g3 Nf6
A14 A14 c4 e6 Nf3 d5 g3 Nf6 Bg2 Be7
A14 Neo Catalan Declined, English c4 e6 Nf3 d5 g3 Nf6 Bg2 Be7 O-O
A14 Keres Defense, English c4 e6 Nf3 d5 g3 Nf6 Bg2 Be7 O-O c5 cxd5 Nxd5 Nc3 Nc6
A13 Neo Catalan Accepted, English c4 e6 Nf3 d5 g3 Nf6 Bg2 dxc4
A13 Romanishin Gambit, English c4 e6 Nf3 Nf6 g3 a6 Bg2 b5
A10 Anglo-Dutch Defense c4 f5
A10 Anglo-Polish Dutch c4 f5 b4
A10 Hickmann Gambit, English c4 f5 e4
A10 Hickmann Gambit, English c4 f5 e4 fxe4 d3
A10 Porcupine Variation, English c4 f5 e4 fxe4 Nc3 Nf6 g4
A10 Wade Gambit, English c4 f5 g4
A10 English Spike c4 f5 g4
A10 Chabanon Gambit, English c4 f5 Nf3 d6 e4
A10 Myers Defense, English c4 g5 d4 Bg7
A10 Zilbermints Gambit, English c4 g5 d4 e5
A10 Great Snake, English c4 g6
A10 Adorjan System, English c4 g6 e4 e5
A10 Beefeater c4 g6 Nc3 Bg7 d4 c5 d5 Bxc3 bxc3 f5
A10 Anglo-Lithuanian Variation, English c4 Nc6
A15 Anglo System, English; A15 c4 Nf6
A15 Mikenas-Carls Variation, English c4 Nf6
A15 English Orangutan c4 Nf6 b4
A15 Shirazi Shove c4 Nf6 g3 h5
A16 A16 c4 Nf6 Nc3
A16 Golombek Defense, English; Anti English c4 Nf6 Nc3 d5
A16 Czech Variation, English c4 Nf6 Nc3 d5 cxd5 Nxd5 g3 g6 Bg2 Nb6
A17 Smyslov Defense, English c4 Nf6 Nc3 d5 cxd5 Nxd5 g3 g6 Bg2 Nxc3
A16 Korchnoi’s Variation, English c4 Nf6 Nc3 d5 cxd5 Nxd5 Nf3 g6 g3 Bg7 Bg2 e5
A16 Stein Attack, English c4 Nf6 Nc3 d5 cxd5 Nxd5 Nf3 g6 Qa4+
A17 Hegehog System, Anglo-Indian English; A17 c4 Nf6 Nc3 e6
A18 Flohr-Mikenas-Carls Variation, English; A18 c4 Nf6 Nc3 e6 e4
A19 Floh-Mikenas-Carls Variation, English; A19 c4 Nf6 Nc3 e6 e4 c5
A19 Nei Gambit, English c4 Nf6 Nc3 e6 e4 c5 e5 Ng8
A18 Kevitz Defense, English c4 Nf6 Nc3 e6 e4 Nc6
A18 Queen’s Indian Formation, English c4 Nf6 Nc3 e6 Nf3 b6
A17 Nimzo-English Opening c4 Nf6 Nc3 e6 Nf3 Bb4
A17 Zviagintsev-Krasenkov Attack, English c4 Nf6 Nc3 e6 Nf3 Bb4 g4
A16 Anti-anti-grunfeld c4 Nf6 Nc3 g6 Nf3 Bg7 e4
A15 King’s Knight Variation, English c4 Nf6 Nf3
A15 Romanishin Variation, English c4 Nf6 Nf3 e6 g3 a6
A40 Queen Pawn Opening; A40 d4
A40 St George’s Gambit d4 a6 c4 b5 e4 e6 cxb5 axb5
A40 Polish Defense d4 b5
A40 Spassky Gambit, Polish Defense d4 b5 e4 Bb7 Bxb5
A40 Queen Fianchetto, Queen Pawn Game d4 b6
A40 Eastbourne Gambit d4 b6 c4 Bb7 Bxb5
A43 Staunton Defense; Benoni C-G; A43 d4 c5
A43 Zilbermints Gambit; Nakamura Gambit, Benoni d4 c5 b4 cxb4
A43 Old Benoni d4 c5 d5 d6
A43 Schmid Variation, Benoni d4 c5 d5 d6 Nc3 g6
A44 Pawn Thrust, Benoni; A44 d4 c5 d5 e5
A44 Blockade Variation; Semi-Benoni; Russian Variation d4 c5 d5 e5 e4 d6
A43 Franco-Benoni; Franco-Sicilian d4 c5 d5 e6 e4
A43 Clarendon Court Variation, Benoni d4 c5 d5 f5
A43 Benoni-Staunton Gambit d4 c5 d5 f5 e4
A43 Snail Variation, Benoni d4 c5 d5 Na6
A43 Benoni-Indian Defense d4 c5 d5 Nf6
A56 Vulture Defense, Benoni d4 c5 d5 Nf6 c4 Ne4
A43 Woozle Defense, Benoni d4 c5 d5 Nf6 Nc3 Qa5
A43 Kingside move order, Benoni d4 c5 d5 Nf6 Nf3
A43 Habichd; Hawk Variation, Benoni d4 c5 d5 Nf6 Nf3 c4
A43 Hawk Variation, Benoni d4 c5 d5 Nf6 Nf3 e4
A43 Benoni Gambit Accepted d4 c5 dxc5
A43 Cormorant Gambit, Benoni d4 c5 dxc5 b6
A43 Schlenker Defense, Benoni d4 c5 dxc5 Na6
A43 Zilbermints-Benoni Gambit d4 c5 Nf3 cxd4 b4
A43 Tamarkin Countergambit, Benoni d4 c5 Nf3 cxd4 b4 e5
A41 Anglo-Slav Opening d4 c6 c4 d6
D00 Queen Pawn Game; Close Opening; D00 d4 d5
D00 Sarratt Attack d4 d5 Bf4
D00 Steinitz Countergambit, Queen Pawn Game d4 d5 Bf4 c5
D00 Morris Gambit d4 d5 Bf4 c5 e4
D00 Morris Counter-Gambit d4 d5 Bf4 c5 e4 dxe4
D00 Bishop Attack; Levitsky Attack, Queen Pawn Game d4 d5 Bg5
D00 Zot d4 d5 Bg5
D00 Welling Variation, Queen Pawn Game d4 d5 Bg5 Bg4
D00 Euwe Variation, Queen Pawn Game d4 d5 Bg5 h6 Bh4 c6 Nf3 Qb6
D06 Queen’s Gambit; Aleppo Gambit; D06 d4 d5 c4
D06 Zilbermints Gambit, QGD d4 d5 c4 b5
D06 Brieger Defense; Sahovic Defense, QGD; Baltic Defense d4 d5 c4 Bf5
D31 Baltic Defense, QGD d4 d5 c4 Bf5 cxd5 Bxb1 Qa4+ c6 dxc6 Nxc6
D31 Argentinian Gambit, QGD d4 d5 c4 Bf5 cxd5 Bxb1 Qa4+ c6 dxc6 Nxc6 Rxb1 Qxd4
D06 Pseudo-Slav, QGD d4 d5 c4 Bf5 Nc3 e6 Nf3 c6
D06 Pseudo-Chigorin, QGD d4 d5 c4 Bf5 Nc3 e6 Nf3 Nc6
D06 Queen Attack, Baltic Defens, QGD d4 d5 c4 Bf5 Nc3 e6 Qb3
D06 Austrian Defense; Summetrical Defense, QGD d4 d5 c4 c5
D06 Gusev Countergambit, QGD d4 d5 c4 c5 cxd5 Nf6
D06 Haberditz Variation, QGD d4 d5 c4 c5 cxd5 Nf6 e4 Nxe4 dxc5 Qa5+
D06 Salvio Countergambit, QGD d4 d5 c4 c5 dxc5 d4
D10 Slav Defense; Czech Defense, QGD; D10 d4 d5 c4 c6
D10 Exchange Variation, Slav d4 d5 c4 c6 cxd5
D10 Slav Pawn Game d4 d5 c4 c6 e3
D10 Diemer Gambit, Slav d4 d5 c4 c6 e4
D10 Alekhine Attack, Slav d4 d5 c4 c6 Nc3 dxc4 e4
D10 Winawer Counter Gambit, Slav d4 d5 c4 c6 Nc3 e5
D10 Anti-Winawer Gambit, Slav d4 d5 c4 c6 Nc3 e5 e4
D11 Modern Line, Slav; D11 d4 d5 c4 c6 Nf3
D11 Slav Bishop’s Game d4 d5 c4 c6 Nf3 Bf5
D11 Bonet Gambit, Slav d4 d5 c4 c6 Nf3 Nf6 Bg5
D13 Exchange Variation, Slav; D13 d4 d5 c4 c6 Nf3 Nf6 cxd5
D14 Symmetrical Line, Slav; D14 d4 d5 c4 c6 Nf3 Nf6 cxd5 cxd5 Nc3 Nc6 Bf4 Bf5
D14 Trifunovic Variation, Slav d4 d5 c4 c6 Nf3 Nf6 cxd5 cxd5 Nc3 Nc6 Bf4 Bf5 e3 e6 Qb3 Bb4
D11 Quiet Variation, Slav d4 d5 c4 c6 Nf3 Nf6 e3
D12 Schallopp Defense, Slav; D12 d4 d5 c4 c6 Nf3 Nf6 e3 Bf5
D12 Amsterdam Variation, Slav d4 d5 c4 c6 Nf3 Nf6 e3 Bf5 cxd5 cxd5 Nc3
D12 Rotterdam Variation, Slav d4 d5 c4 c6 Nf3 Nf6 e3 Bf5 cxd5 cxd5 Qb3
D12 Landau Variation, Slav d4 d5 c4 c6 Nf3 Nf6 e3 Bf5 cxd5 cxd5 Qb3 Qc8 Bd2 e6 Na3
D12 Pin Defense, Slav d4 d5 c4 c6 Nf3 Nf6 e3 Bg4
D11 Breyer Variation, Slav d4 d5 c4 c6 Nf3 Nf6 Nbd2
D15 Three Knights Variation, Slav; D15 d4 d5 c4 c6 Nf3 Nf6 Nc3
D15 Chameleon Variation, Slav d4 d5 c4 c6 Nf3 Nf6 Nc3 a6
D15 Advance System, Slav d4 d5 c4 c6 Nf3 Nf6 Nc3 c5
D15 Two Knights Attack, Slav d4 d5 c4 c6 Nf3 Nf6 Nc3 dxc4
D16 Alapin Variation, Slav; D16 d4 d5 c4 c6 Nf3 Nf6 Nc3 dxc4 a4
D17 Czech Defense; Open Slav Defense; D17 d4 d5 c4 c6 Nf3 Nf6 Nc3 dxc4 a4 Bf5
D18 Dutch Variation, Slav; D18 d4 d5 c4 c6 Nf3 Nf6 Nc3 dxc4 a4 Bf5 e3
D19 Main Line, Czech Variation, Slav; D19 d4 d5 c4 c6 Nf3 Nf6 Nc3 dxc4 a4 Bf5 e3 e6 Bxc4 Bb4 O-O O-O Qe2
D18 Mareschall Variation, Slav; Lasker Variation d4 d5 c4 c6 Nf3 Nf6 Nc3 dxc4 a4 Bf5 e3 Na6
D17 Krause Attack, Slav d4 d5 c4 c6 Nf3 Nf6 Nc3 dxc4 a4 Bf5 Ne5
D17 Wiesbaden Variation, Slav d4 d5 c4 c6 Nf3 Nf6 Nc3 dxc4 a4 Bf5 Ne5 e6
D17 Sharp Line, Wiesbaden Variation, Slav d4 d5 c4 c6 Nf3 Nf6 Nc3 dxc4 a4 Bf5 Ne5 e6 f3 Bb4 e4
D17 Fazekas Gambit, Slav d4 d5 c4 c6 Nf3 Nf6 Nc3 dxc4 a4 Bf5 Ne5 Na6 e4
D17 Carlsbad Variation, Slav d4 d5 c4 c6 Nf3 Nf6 Nc3 dxc4 a4 Bf5 Ne5 Nbd7 Nxc4 Qc7 g3 e5
D17 Baarn Variation, Slav; Bled Attack d4 d5 c4 c6 Nf3 Nf6 Nc3 dxc4 a4 Bf5 Nh4
D16 Steiner Variation, Slav d4 d5 c4 c6 Nf3 Nf6 Nc3 dxc4 a4 Bg4
D16 Soultanbeieff Variation, Slav d4 d5 c4 c6 Nf3 Nf6 Nc3 dxc4 a4 e6
D16 Smyslov Variation, Slav d4 d5 c4 c6 Nf3 Nf6 Nc3 dxc4 a4 Na6
D15 Alekhine Variation, Slav d4 d5 c4 c6 Nf3 Nf6 Nc3 dxc4 e3
D15 Alekhine Variation, Slav d4 d5 c4 c6 Nf3 Nf6 Nc3 dxc4 e3 b5 a4 b4
D15 Geller Variation; Geller-Tolush Var, Slav d4 d5 c4 c6 Nf3 Nf6 Nc3 dxc4 e4
D15 Schlechter Variation, Slav d4 d5 c4 c6 Nf3 Nf6 Nc3 g6
D15 Suchting Variation, Slav d4 d5 c4 c6 Nf3 Nf6 Nc3 Qb6
D20 Queen’s Gambit Accepted; D20 d4 d5 c4 dxc4
D20 Old Variation, QGA d4 d5 c4 dxc4 e3
D20 Korchnoi Gambit, QGA d4 d5 c4 dxc4 e3 e5 Bc4 exd4 Qb3 Qe7 Kf1
D20 Novikov Gambit, QGA d4 d5 c4 dxc4 e3 e5 Bc4 exd4 Qb3 Qe7 Nd2
D20 Christensen Gambit, QGA d4 d5 c4 dxc4 e3 e5 Bc4 exd4 Qb3 Qe7 Nf3
D20 Saduleto Variation, QGA; Central Variation, QGA d4 d5 c4 dxc4 e4
D20 Greco Variation, QGA d4 d5 c4 dxc4 e4 b5
D20 Rubinstein Variation, QGA d4 d5 c4 dxc4 e4 c5
D20 Yefimov Gambit, QGA d4 d5 c4 dxc4 e4 c5 d5 b5
D20 Linares Variation, QGA d4 d5 c4 dxc4 e4 c5 d5 Nf6 Nc3 b5
D20 McDonnell Defense, QGA d4 d5 c4 dxc4 e4 e5
D20 Somov Gambit, QGA d4 d5 c4 dxc4 e4 e5 Bxc4
D01 Betbeder; Veresov; Levitzky; Parisian d4 d5 c4 dxc4 e4 f5
D20 Versov; Betbeder; Schwartz Defense, QGA d4 d5 c4 dxc4 e4 f5
D20 Modern Defense, QGA d4 d5 c4 dxc4 e4 Nc6
D20 Alekhine System, QGA d4 d5 c4 dxc4 e4 Nf6
D20 Gunsberg Defense; Prianishenmo Gambit, QGA d4 d5 c4 dxc4 Nc3 c5 d5 Nf6 Nc3 e6 e4 exd5 e5
D21 Blackburne’s Move, QGA; Normal Variation, QGA; D21 d4 d5 c4 dxc4 Nf3
D21 Alekhine Variation, QGA d4 d5 c4 dxc4 Nf3 a6
D22 D22 d4 d5 c4 dxc4 Nf3 a6 e3
D22 Haberditz Variation, QGA d4 d5 c4 dxc4 Nf3 a6 e3 b5
D22 Alekhine Variation, QGA d4 d5 c4 dxc4 Nf3 a6 e3 Bg4
D22 Borisenko-Furman Variation, QGA d4 d5 c4 dxc4 Nf3 a6 e4
D21 Slav Gambit, QGA d4 d5 c4 dxc4 Nf3 b5
D21 Gunsberg Defense, QGA d4 d5 c4 dxc4 Nf3 c5
D21 Prianishenmo Gambit, QGA d4 d5 c4 dxc4 Nf3 c5 d5 Nf6 Nc3 e6 e4 exd5 e5
D21 Rosenthal Variation, QGA d4 d5 c4 dxc4 Nf3 e6
D21 Godes Variation, QGA d4 d5 c4 dxc4 Nf3 Nd7
D23 D23 d4 d5 c4 dxc4 Nf3 Nf6
D25 D25 d4 d5 c4 dxc4 Nf3 Nf6 e3
D25 Flohr; Winawer Variation, QGA d4 d5 c4 dxc4 Nf3 Nf6 e3 Be6
D25 Larsen; Janowski; Modern Variation, QGA d4 d5 c4 dxc4 Nf3 Nf6 e3 Bg4
D26 Traditional System QGA; D26 d4 d5 c4 dxc4 Nf3 Nf6 e3 e6
D26 Classical Defense, QGA d4 d5 c4 dxc4 Nf3 Nf6 e3 e6 Bxc4 c5
D27 Rubinstein Variation, QGA; D27 d4 d5 c4 dxc4 Nf3 Nf6 e3 e6 Bxc4 c5 O-O a6
D27 Furman Variation, QGA d4 d5 c4 dxc4 Nf3 Nf6 e3 e6 Bxc4 c5 O-O a6 dxc5 Bxc5
D27 Russian Gambit, QGA d4 d5 c4 dxc4 Nf3 Nf6 e3 e6 Bxc4 c5 O-O a6 e4
D28 Alekhine System, Classical Defense, QGA; D28 d4 d5 c4 dxc4 Nf3 Nf6 e3 e6 Bxc4 c5 O-O a6 Qe2
D28 Accelerated Fianchetto, QGA d4 d5 c4 dxc4 Nf3 Nf6 e3 e6 Bxc4 c5 O-O a6 Qe2 b5
D29 D29 d4 d5 c4 dxc4 Nf3 Nf6 e3 e6 Bxc4 c5 O-O a6 Qe2 b5 Bb3 Bb7
D29 Smyslov Variation, Classical Defense, QGA d4 d5 c4 dxc4 Nf3 Nf6 e3 e6 Bxc4 c5 O-O a6 Qe2 b5 Bb3 Bb7 Rd1 Nbd7 Nc3 Bd6
D28 Counter Fianchetto Variation, QGA d4 d5 c4 dxc4 Nf3 Nf6 e3 e6 Bxc4 c5 O-O a6 Qe2 Nc6 dxc5
D28 Four Knights Variation, QGA d4 d5 c4 dxc4 Nf3 Nf6 e3 e6 Bxc4 c5 O-O a6 Qe2 Nc6 Nc3
D26 Steinitz Variation, QGA d4 d5 c4 dxc4 Nf3 Nf6 e3 e6 Bxc4 c5 O-O cxd4
D26 Development Variation, QGA d4 d5 c4 dxc4 Nf3 Nf6 e3 e6 Bxc4 c5 O-O Nc6
D25 Smyslov Variation, QGA d4 d5 c4 dxc4 Nf3 Nf6 e3 g6
D24 Showalter Variation, QGA; D24 d4 d5 c4 dxc4 Nf3 Nf6 Nc3
D24 Bogoljubow Defense, QGA d4 d5 c4 dxc4 Nf3 Nf6 Nc3 a6 e4
D23 Mannheim Variation, QGA d4 d5 c4 dxc4 Nf3 Nf6 Qa4+
D08 Albin Countergambit; Cavalotti Var, QGD; D08 d4 d5 c4 e5
D08 Lasker Trap, QGD d4 d5 c4 e5 dxe5 d4 e3 Bb4+ Bd2 dxe3
D08 Normal Line, Albin Countergambit, QGD d4 d5 c4 e5 dxe5 d4 Nf3
D08 Tartakower Defense, QGD d4 d5 c4 e5 dxe5 d4 Nf3 c5
D09 Fianchetto Variation, Albin Countergambit; D09 d4 d5 c4 e5 dxe5 d4 Nf3 Nc6 g3
D08 Alapin Variation, QGD d4 d5 c4 e5 dxe5 d4 Nf3 Nc6 Nbd2
D30 D30 d4 d5 c4 e6
D31 Queen’s Knight Variation, QGD; D31 d4 d5 c4 e6 Nc3
D31 Janowski Variation, QGD d4 d5 c4 e6 Nc3 a6
D31 Alapin Variation, QGD d4 d5 c4 e6 Nc3 b6
D31 Alatortsev; Petrosian, Charousek Var, QGD d4 d5 c4 e6 Nc3 Be7
D31 Miladinovic Gambit, QGD d4 d5 c4 e6 Nc3 Be7 e4 dxe4 f3
D32 Tarrasch Defense, QGD; D32 d4 d5 c4 e6 Nc3 c5
D32 Schara-Hennig; Duisburg Gambit, QGD d4 d5 c4 e6 Nc3 c5 cxd5 cxd4
D32 Von Hennig Gambit, QGD d4 d5 c4 e6 Nc3 c5 cxd5 cxd4 Qxd4 Nc6 Qd1 exd5 Qxd5 Be6
D32 Tarrasch Gambit, QGD d4 d5 c4 e6 Nc3 c5 cxd5 exd5 dxc5 d4 Na4 b5
D32 Marshall Gambit, Tarrasch d4 d5 c4 e6 Nc3 c5 cxd5 exd5 e4
D32 Two Knights Variation, Tarrasch d4 d5 c4 e6 Nc3 c5 cxd5 exd5 Nf3
D32 Grunfeld Gambit, Tarrasch d4 d5 c4 e6 Nc3 c5 cxd5 exd5 Nf3 Nc6 dxc5 d4 Na4 b5
D33 Lodz; Schlecter; Rubinstein Var, QGD; D33 d4 d5 c4 e6 Nc3 c5 cxd5 exd5 Nf3 Nc6 g3
D33 Folkestone; Swedish Var, QGD d4 d5 c4 e6 Nc3 c5 cxd5 exd5 Nf3 Nc6 g3 c4
D33 Prague Variation, QGD d4 d5 c4 e6 Nc3 c5 cxd5 exd5 Nf3 Nc6 g3 Nf6
D34 D34 d4 d5 c4 e6 Nc3 c5 cxd5 exd5 Nf3 Nc6 g3 Nf6 Bg2 Be7
D34 Rubinstein; Normal Position, QGD d4 d5 c4 e6 Nc3 c5 cxd5 exd5 Nf3 Nc6 g3 Nf6 Bg2 Be7 O-O O-O
D34 Carlsbad Variation, Tarrasch d4 d5 c4 e6 Nc3 c5 cxd5 exd5 Nf3 Nc6 g3 Nf6 Bg2 Be7 O-O O-O Bg5
D34 Endgame Variation, Tarrasch d4 d5 c4 e6 Nc3 c5 cxd5 exd5 Nf3 Nc6 g3 Nf6 Bg2 Be7 O-O O-O Bg5 Be6
D34 Bogoljubow Variation, Tarrasch d4 d5 c4 e6 Nc3 c5 cxd5 exd5 Nf3 Nc6 g3 Nf6 Bg2 Be7 O-O O-O Bg5 Be6 Rc1 c4
D34 Advance Variation, Tarrasch d4 d5 c4 e6 Nc3 c5 cxd5 exd5 Nf3 Nc6 g3 Nf6 Bg2 Be7 O-O O-O Bg5 c4
D34 Spassky Variation, Tarrasch d4 d5 c4 e6 Nc3 c5 cxd5 exd5 Nf3 Nc6 g3 Nf6 Bg2 Be7 O-O O-O Bg5 cxd4 Nxd4
D34 Reti Variation, QGD d4 d5 c4 e6 Nc3 c5 cxd5 exd5 Nf3 Nc6 g3 Nf6 Bg2 Be7 O-O O-O dxc5 Bxc5 Na4
D34 Classical Tarrasch Gambit d4 d5 c4 e6 Nc3 c5 cxd5 exd5 Nf3 Nc6 g3 Nf6 Bg2 Be7 O-O O-O dxc5 d4
D33 Wagner Variation, Tarrasch d4 d5 c4 e6 Nc3 c5 cxd5 exd5 Nf3 Nc6 g3 Nf6 Bg2 Bg4
D32 Symmetrical Variation, Tarrasch d4 d5 c4 e6 Nc3 c5 e3 Nf6 Nf3 Nc6
D31 Semi-Slav Defense d4 d5 c4 e6 Nc3 c6
A84 Slav Stonewall, Dutch d4 d5 c4 e6 Nc3 c6 e3 f5
D31 Portisch Gambit, Semi-Slav d4 d5 c4 e6 Nc3 c6 e3 f5 g4
D31 Marshall Gambit, Semi-Slav d4 d5 c4 e6 Nc3 c6 e4
D31 Gunderam Gambit, Semi-Slav d4 d5 c4 e6 Nc3 c6 e4 dxe4 f3
D31 Tolush Variation, Semi-Slav d4 d5 c4 e6 Nc3 c6 e4 dxe4 Nxe4 Bb4+ Bd2 Qxd4 Bxb4 Qxe4+Be2 c5 Bxc5 Qxg2
D31 Noteboom Variation, Semi-Slav d4 d5 c4 e6 Nc3 c6 Nf3 dxc4
D31 Abrahams; Noteboom; Klaus Junge Var, QGD d4 d5 c4 e6 Nc3 c6 Nf3 dxc4 a4 Bb4 e3 b5 Bd2 a5
D31 Anti-Noteboom Variation, Semi-Slav d4 d5 c4 e6 Nc3 c6 Nf3 dxc4 Bg5
D31 Beliavsky Line, Semi-Slav d4 d5 c4 e6 Nc3 c6 Nf3 dxc4 Bg5 f6
D35 D35 d4 d5 c4 e6 Nc3 Nf6
D35 Harrwitz; Rubinstein Var, QGD d4 d5 c4 e6 Nc3 Nf6 Bf4
D50 Modern Variation, QGD; D50 d4 d5 c4 e6 Nc3 Nf6 Bg5
D53 D53 d4 d5 c4 e6 Nc3 Nf6 Bg5 Be7
D53 Heral Variation, QGD d4 d5 c4 e6 Nc3 Nf6 Bg5 Be7 Bxf6
D53 Lasker Defense, QGD d4 d5 c4 e6 Nc3 Nf6 Bg5 Be7 e3 Ne4
D55 D55 d4 d5 c4 e6 Nc3 Nf6 Bg5 Be7 e3 O-O Nf3
D55 Pillsbury Attack, QGD d4 d5 c4 e6 Nc3 Nf6 Bg5 Be7 e3 O-O Nf3 b6 Bd3 Bb7 cxd5 exd5 Ne5
D55 Neo Orthodox Variation, QGD d4 d5 c4 e6 Nc3 Nf6 Bg5 Be7 e3 O-O Nf3 h6
D56 D56 d4 d5 c4 e6 Nc3 Nf6 Bg5 Be7 e3 O-O Nf3 h6 Bh4
D58 Tartakower Variation, QGD; D58 d4 d5 c4 e6 Nc3 Nf6 Bg5 Be7 e3 O-O Nf3 h6 Bh4 b6
D59 Exchange Variation, Tartakower Defense, QGD; D59 d4 d5 c4 e6 Nc3 Nf6 Bg5 Be7 e3 O-O Nf3 h6 Bh4 b6 cxd5 Nxd5
D56 Lasker Variation, QGD d4 d5 c4 e6 Nc3 Nf6 Bg5 Be7 e3 O-O Nf3 h6 Bh4 Ne4 Bxe7 Qxe7
D57 D57 d4 d5 c4 e6 Nc3 Nf6 Bg5 Be7 e3 O-O Nf3 h6 Bh4 Ne4 Bxe7 Qxe7 cxd5
D57 Bernstein Variation, QGD d4 d5 c4 e6 Nc3 Nf6 Bg5 Be7 e3 O-O Nf3 h6 Bh4 Ne4 Bxe7 Qxe7 cxd5 Nxc3 bxc3
D56 Teichmann Variation, QGD d4 d5 c4 e6 Nc3 Nf6 Bg5 Be7 e3 O-O Nf3 h6 Bh4 Ne4 Bxe7 Qxe7 Qc2
D55 Anti-Tartakower Variation, QGD d4 d5 c4 e6 Nc3 Nf6 Bg5 Be7 e3 O-O Nf3 h6 Bxf6
D55 Petrosian Variation, QGD d4 d5 c4 e6 Nc3 Nf6 Bg5 Be7 e3 O-O Nf3 h6 Bxf6 Bxf6 Rc1 c6 Bd3 Nd7 O-O dxc4
D60 Orthodox Variation, QGD; D60 d4 d5 c4 e6 Nc3 Nf6 Bg5 Be7 e3 O-O Nf3 Nbd7
D60 Botvinnik Variation, QGD d4 d5 c4 e6 Nc3 Nf6 Bg5 Be7 e3 O-O Nf3 Nbd7 Bd3
D60 Rauzer Variation, QGD d4 d5 c4 e6 Nc3 Nf6 Bg5 Be7 e3 O-O Nf3 Nbd7 Qb3
D61 Rubinstein Variation, Orthodox Defense, QGD; D61 d4 d5 c4 e6 Nc3 Nf6 Bg5 Be7 e3 O-O Nf3 Nbd7 Qc2
D62 D62 d4 d5 c4 e6 Nc3 Nf6 Bg5 Be7 e3 O-O Nf3 Nbd7 Qc2 c5 cxd5
D63 D63 d4 d5 c4 e6 Nc3 Nf6 Bg5 Be7 e3 O-O Nf3 Nbd7 Rc1
D63 Henneberger; Swiss Variation, QGD d4 d5 c4 e6 Nc3 Nf6 Bg5 Be7 e3 O-O Nf3 Nbd7 Rc1 a6
D63 Capablanca Variation, QGD d4 d5 c4 e6 Nc3 Nf6 Bg5 Be7 e3 O-O Nf3 Nbd7 Rc1 b6 cxd5 exd5 Bb5
D63 Pillsbury Variation, QGD d4 d5 c4 e6 Nc3 Nf6 Bg5 Be7 e3 O-O Nf3 Nbd7 Rc1 b6 cxd5 exd5 Bd3
D63 Rubinstein Variation, QGD d4 d5 c4 e6 Nc3 Nf6 Bg5 Be7 e3 O-O Nf3 Nbd7 Rc1 c6
D66 D66 d4 d5 c4 e6 Nc3 Nf6 Bg5 Be7 e3 O-O Nf3 Nbd7 Rc1 c6 Bd3
D66 Fianchetto Variation, Orthodox Defense, QGD d4 d5 c4 e6 Nc3 Nf6 Bg5 Be7 e3 O-O Nf3 Nbd7 Rc1 c6 Bd3 dxc4 Bxc4 b5
D67 Capablanca Freeing Maneuver, QGD; D67 d4 d5 c4 e6 Nc3 Nf6 Bg5 Be7 e3 O-O Nf3 Nbd7 Rc1 c6 Bd3 dxc4 Bxc4 Nd5
D67 Alekhine Variation, QGD d4 d5 c4 e6 Nc3 Nf6 Bg5 Be7 e3 O-O Nf3 Nbd7 Rc1 c6 Bd3 dxc4 Bxc4 Nd5 Bxe7 Qxe7 Ne4
D67 Classical Variation, QGD d4 d5 c4 e6 Nc3 Nf6 Bg5 Be7 e3 O-O Nf3 Nbd7 Rc1 c6 Bd3 dxc4 Bxc4 Nd5 Bxe7 Qxe7 O-O Nxc3 1Rxc3
D68 D68 d4 d5 c4 e6 Nc3 Nf6 Bg5 Be7 e3 O-O Nf3 Nbd7 Rc1 c6 Bd3 dxc4 Bxc4 Nd5 Bxe7 Qxe7 O-O Nxc3 1Rxc3 e5
D69 D69 d4 d5 c4 e6 Nc3 Nf6 Bg5 Be7 e3 O-O Nf3 Nbd7 Rc1 c6 Bd3 dxc4 Bxc4 Nd5 Bxe7 Qxe7 O-O Nxc3 1Rxc3 e5 1dxe5
D64 Janowski Variation, Orthodox Defense, QGD d4 d5 c4 e6 Nc3 Nf6 Bg5 Be7 e3 O-O Nf3 Nbd7 Rc1 c6 Bd3 dxc4 Bxc4 Nd5 h4
D64 Rubinstein Attack, Orthodox Defense, QGD; D64 d4 d5 c4 e6 Nc3 Nf6 Bg5 Be7 e3 O-O Nf3 Nbd7 Rc1 c6 Qc2
D65 D65 d4 d5 c4 e6 Nc3 Nf6 Bg5 Be7 e3 O-O Nf3 Nbd7 Rc1 c6 Qc2 a6 cxd5
D54 Neo-Orthodox Variation, QGD; D54 d4 d5 c4 e6 Nc3 Nf6 Bg5 Be7 e3 O-O Rc1
D50 Uhlmann Variation, QGD d4 d5 c4 e6 Nc3 Nf6 Bg5 Be7 Nf3 h6 Bh4 O-O Rc1 dxc4
D50 Been & Koomen; Dutch & Peruvian d4 d5 c4 e6 Nc3 Nf6 Bg5 c5
D50 Pseudo-Tarrasch Variation, QGD d4 d5 c4 e6 Nc3 Nf6 Bg5 c5 cxd5
D50 Canal; Venice Variation, QGD d4 d5 c4 e6 Nc3 Nf6 Bg5 c5 cxd5 Qb6
D50 Primitive Pillsbury Variation, QGD d4 d5 c4 e6 Nc3 Nf6 Bg5 c5 Nf3 cxd4 Qxd4
D51 Knight Defense, QGD; D51 d4 d5 c4 e6 Nc3 Nf6 Bg5 Nbd7
D51 Manhattan; Westphalia Variation, QGD d4 d5 c4 e6 Nc3 Nf6 Bg5 Nbd7 e3 Bb4
D51 Westphalian Variation, QGD d4 d5 c4 e6 Nc3 Nf6 Bg5 Nbd7 e3 Bb4 Nf3 c5
D52 D52 d4 d5 c4 e6 Nc3 Nf6 Bg5 Nbd7 e3 c6 Nf3
D52 Cambridge Springs; Pillsbury Variation, QGD d4 d5 c4 e6 Nc3 Nf6 Bg5 Nbd7 e3 c6 Nf3 Qa5
D52 Bogoljubov Variation, QGD d4 d5 c4 e6 Nc3 Nf6 Bg5 Nbd7 e3 c6 Nf3 Qa5 Nd2 Bb4 Qc2
D52 Argentine Variation, QGD d4 d5 c4 e6 Nc3 Nf6 Bg5 Nbd7 e3 c6 Nf3 Qa5 Nd2 Bb4 Qc2 O-O Bh4
D51 Alekhine Variation, QGD d4 d5 c4 e6 Nc3 Nf6 Bg5 Nbd7 Nf3 c6 e4
D51 Alekhine Gambit, QGD d4 d5 c4 e6 Nc3 Nf6 Bg5 Nbd7 Nf3 h6 Bh4 dxc4
D35 Exchange Variation, QGD d4 d5 c4 e6 Nc3 Nf6 cxd5
D35 Positional Variation, Exchange Variation, QGD d4 d5 c4 e6 Nc3 Nf6 cxd5 exd5 Bg5
D36 Reshevsky Variation, QGD; D36 d4 d5 c4 e6 Nc3 Nf6 cxd5 exd5 Bg5 c6 Qc2
D35 Saemisch Variation, QGD d4 d5 c4 e6 Nc3 Nf6 cxd5 exd5 Nf3 Nbd7 Bf4
D37 Three Knights Variation, QGD; D37 d4 d5 c4 e6 Nc3 Nf6 Nf3
D38 Ragozin Variation, QGD; D38 d4 d5 c4 e6 Nc3 Nf6 Nf3 Bb4
D39 Vienna Variation, QGD; D39 d4 d5 c4 e6 Nc3 Nf6 Nf3 Bb4 Bg5 dxc4
D38 Alekhine Variation, QGD d4 d5 c4 e6 Nc3 Nf6 Nf3 Bb4 Qa4
D37 Harrwitz Attack, QGD d4 d5 c4 e6 Nc3 Nf6 Nf3 Be7 Bf4
D40 Semi-Tarrasch Variation, QGD; D40 d4 d5 c4 e6 Nc3 Nf6 Nf3 c5
D40 Pillsbury Variation, Semi-Tarrasch d4 d5 c4 e6 Nc3 Nf6 Nf3 c5 Bg5
D41 D41 d4 d5 c4 e6 Nc3 Nf6 Nf3 c5 cxd5
D42 D42 d4 d5 c4 e6 Nc3 Nf6 Nf3 c5 cxd5 Nxd5 e3 Nc6 Bd3
D41 San Sebastian Variation, QGD d4 d5 c4 e6 Nc3 Nf6 Nf3 c5 cxd5 Nxd5 e4 Nxc3 bxc3 cxd4 cxd4 Bb4+ Bd2 Bxd2+
D43 D43 d4 d5 c4 e6 Nc3 Nf6 Nf3 c6
D43 Anti-Meran Gambit, QGD d4 d5 c4 e6 Nc3 Nf6 Nf3 c6 Bg5
D44 Semi-Slav Defense Accepted; D44 d4 d5 c4 e6 Nc3 Nf6 Nf3 c6 Bg5 dxc4
D44 Botvinnik Variation, QGD d4 d5 c4 e6 Nc3 Nf6 Nf3 c6 Bg5 dxc4 e4 b5
D44 Ekstrom Variation, Semi-Slav d4 d5 c4 e6 Nc3 Nf6 Nf3 c6 Bg5 dxc4 e4 b5 e5 h6 Bh4 g5 exf6 gxh4 Ne5
D44 Lilienthal Variation, Semi-Slav d4 d5 c4 e6 Nc3 Nf6 Nf3 c6 Bg5 dxc4 e4 b5 e5 h6 Bh4 g5 Nxg5 hxg5 Bxg5 Nbd7
D44 Alatortsev System, Semi-Slav d4 d5 c4 e6 Nc3 Nf6 Nf3 c6 Bg5 dxc4 e4 b5 e5 h6 Bh4 g5 Nxg5 Nd5
D44 Anti-Moscow Gambit d4 d5 c4 e6 Nc3 Nf6 Nf3 c6 Bg5 h6 Bh4
D45 D45 d4 d5 c4 e6 Nc3 Nf6 Nf3 c6 e3
D45 Acclerated Meran, QGD d4 d5 c4 e6 Nc3 Nf6 Nf3 c6 e3 a6
D45 Normal Variation, Semi-Slav d4 d5 c4 e6 Nc3 Nf6 Nf3 c6 e3 Nbd7
D46 D46 d4 d5 c4 e6 Nc3 Nf6 Nf3 c6 e3 Nbd7 Bd3
D46 Romi Variation, QGD d4 d5 c4 e6 Nc3 Nf6 Nf3 c6 e3 Nbd7 Bd3 Bb4
D46 Chigorin Variation, QGD d4 d5 c4 e6 Nc3 Nf6 Nf3 c6 e3 Nbd7 Bd3 Bd6
D46 Bogoljubow Variation, QGD d4 d5 c4 e6 Nc3 Nf6 Nf3 c6 e3 Nbd7 Bd3 Be7
D47 Meran Variation, QGD; D47 d4 d5 c4 e6 Nc3 Nf6 Nf3 c6 e3 Nbd7 Bd3 dxc4 Bxc4
D48 Reynolds Variation, QGD; D48 d4 d5 c4 e6 Nc3 Nf6 Nf3 c6 e3 Nbd7 Bd3 dxc4 Bxc4 b5 Bd3 a6
D48 Pirc Variation, QGD d4 d5 c4 e6 Nc3 Nf6 Nf3 c6 e3 Nbd7 Bd3 dxc4 Bxc4 b5 Bd3 a6 e4 b4
D48 Old Variation, Semi-Slav d4 d5 c4 e6 Nc3 Nf6 Nf3 c6 e3 Nbd7 Bd3 dxc4 Bxc4 b5 Bd3 a6 e4 c5 e5
D49 Blumenfeld Variation, QGD; D49 d4 d5 c4 e6 Nc3 Nf6 Nf3 c6 e3 Nbd7 Bd3 dxc4 Bxc4 b5 Bd3 a6 e4 c5 e5 cxd4 Nxb5
D49 Sozin Variation, QGD d4 d5 c4 e6 Nc3 Nf6 Nf3 c6 e3 Nbd7 Bd3 dxc4 Bxc4 b5 Bd3 a6 e4 c5 e5 cxd4 Nxb5 Nxe5
D49 Stahlberg Variation, QGD d4 d5 c4 e6 Nc3 Nf6 Nf3 c6 e3 Nbd7 Bd3 dxc4 Bxc4 b5 Bd3 a6 e4 c5 e5 cxd4 Nxb5 Nxe5 1Nxe5 axb5
D48 Reynolds Variation, Semi-Slav d4 d5 c4 e6 Nc3 Nf6 Nf3 c6 e3 Nbd7 Bd3 dxc4 Bxc4 b5 Bd3 a6 e4 d5
D48 Old Meran Variation, QGD d4 d5 c4 e6 Nc3 Nf6 Nf3 c6 e3 Nbd7 Bd3 dxc4 Bxc4 b5 Bd3 a6 O-O
D47 Lundin; Neo-Meran d4 d5 c4 e6 Nc3 Nf6 Nf3 c6 e3 Nbd7 Bd3 dxc4 Bxc4 b5 Bd3 b4
D47 Wade Variation, QGD d4 d5 c4 e6 Nc3 Nf6 Nf3 c6 e3 Nbd7 Bd3 dxc4 Bxc4 b5 Bd3 Bb7
D47 Larsen Variation, Semi-Slav d4 d5 c4 e6 Nc3 Nf6 Nf3 c6 e3 Nbd7 Bd3 dxc4 Bxc4 b5 Bd3 Bb7 e4 b4 Na4 c5
D45 Rubinstein; anti-Meran d4 d5 c4 e6 Nc3 Nf6 Nf3 c6 e3 Nbd7 Ne5
D45 Stoltz Variation, Semi-Slav d4 d5 c4 e6 Nc3 Nf6 Nf3 c6 e3 Nbd7 Qc2
D45 Center Variation, Semi-Slav d4 d5 c4 e6 Nc3 Nf6 Nf3 c6 e3 Nbd7 Qc2 Bd6 e4
D45 Mikhalchishin Line, Semi-Slav d4 d5 c4 e6 Nc3 Nf6 Nf3 c6 e3 Nbd7 Qc2 Bd6 e4 dxe4 Nxe4 Nxe4 Qxe4 e5 dxe5
D45 Shabalov Attack, Semi-Slav d4 d5 c4 e6 Nc3 Nf6 Nf3 c6 e3 Nbd7 Qc2 Bd6 g4
D44 Stonewall Defense, Semi-Slav d4 d5 c4 e6 Nc3 Nf6 Nf3 c6 e3 Ne4 Bd3 f5
D44 Vienna Variation, Semi-Slav d4 d5 c4 e6 Nc3 Nf6 Nf3 dxc4
D30 Pseudo-Tarrasch, QGD d4 d5 c4 e6 Nf3 c5
D30 Bishop Attack, Tarrasch d4 d5 c4 e6 Nf3 c5 cxd5 exd5 Bg5
D30 Anti-Noteboom Gambit, Semi-Slav d4 d5 c4 e6 Nf3 c6 Nc3 dxc4 g3
D30 Traditional Variation, QGD d4 d5 c4 e6 Nf3 Nf6 Bg5
D30 Vienna Variation, QGD d4 d5 c4 e6 Nf3 Nf6 Bg5 Bb4+
D30 Duras Variation, QGD; Capablanca Variation d4 d5 c4 e6 Nf3 Nf6 Bg5 h6
D30 Hastings Variation, QGD d4 d5 c4 e6 Nf3 Nf6 Bg5 h6 Bxf6 Qxf6 Nc3 c6 Qb3
D30 Capablanca Variation, QGD d4 d5 c4 e6 Nf3 Nf6 Bg5 Nbd7 e3 c6 Nbd2
D30 Pseudo-Meran; Semi-Slav, QGD d4 d5 c4 e6 Nf3 Nf6 e3 c6
D30 Quiet Variation, Semi-Slav d4 d5 c4 e6 Nf3 Nf6 e3 c6 Nbd2
D30 Semmering Variation, Semi-Slav d4 d5 c4 e6 Nf3 Nf6 e3 c6 Nbd2 Nbd7 Bd3 c5
D06 Alekhine Defense, QGD d4 d5 c4 g6
D07 Chigorin Defense, QGD; D07 d4 d5 c4 Nc6
D07 Exchange Variation, Chigorin Defense d4 d5 c4 Nc6 cxd5 Qxd5
D07 Costa’s Line d4 d5 c4 Nc6 cxd5 Qxd5 e3 e5 Nc3 Bb4 Bd2 Bxc3 Bxc3 exd4 Ne2
D07 Janowski Variation, QGD d4 d5 c4 Nc6 Nc3 dxc4 Nf3
D06 Tartakower Gambit, QGD d4 d5 c4 Nc6 Nc3 e5
D06 Modern Gambit, Chigorin Defense d4 d5 c4 Nc6 Nc3 Nf6 Nf3 dxc4
D06 Alekhine Variation, Chigorin Defense d4 d5 c4 Nc6 Nf3 Bg4 Qa4
D06 Lazard Gambit, Chigorin Defense d4 d5 c4 Nc6 Nf3 e5
D06 Marshall Defense; Knight Defense, QGD d4 d5 c4 Nf6
D06 Cocquio Counter Gambit, QGD; Tan Gambit d4 d5 c4 Nf6 cxd5 c6
D00 Stonewall Attack, Queen Pawn Game d4 d5 e3 Nf6 Bd3
D00 Stonewall Attack d4 d5 e3 Nf6 Bd3 c5 c3
D00 Blackmar-Diemer Gambit d4 d5 e4
D00 Fritz Gambit, BDG d4 d5 e4 dxe4 Bc4
D00 Diemer-Rosenberg Attack, BDG d4 d5 e4 dxe4 Be3
D00 Blackmar Gambit; Gedult Gambit d4 d5 e4 dxe4 f3
D00 Pohlmann Variation, BDG d4 d5 e4 dxe4 f3 f5
D00 Mieses; Nimzovich Var, BDG d4 d5 e4 dxe4 f3 Nc6
D00 Polish Gambit, BDG d4 d5 e4 dxe4 Nc3
D00 Grosshans Defense, BDG d4 d5 e4 dxe4 Nc3 Bd7
D00 Zeller Defesne, BDG d4 d5 e4 dxe4 Nc3 Bf5
D00 Zeller Defesne, BDG d4 d5 e4 dxe4 Nc3 Bf5 f3 exf3 Qxf3 Bc8
D00 Soller Attack, BDG d4 d5 e4 dxe4 Nc3 Bf5 f3 Nf6 Bc4
D00 Dries Counter-Attack, BDG d4 d5 e4 dxe4 Nc3 c5
D00 Lemberger Counter-Gambit, BDG d4 d5 e4 dxe4 Nc3 e5
D00 Soller; Lemberger Var, BDG; Diemer Attack d4 d5 e4 dxe4 Nc3 e5 Be3
D00 Endgame Variation, BDG d4 d5 e4 dxe4 Nc3 e5 dxe5
D00 Rasmussen Attack, BDG d4 d5 e4 dxe4 Nc3 e5 Nge2
D00 Lange Gambit; Alfred Lange Gambit; Simple Variation d4 d5 e4 dxe4 Nc3 e5 Nxe4
D00 Sneiders Attack, BDG d4 d5 e4 dxe4 Nc3 e5 Qh5
D00 Rasa-Studier Variation, BDG d4 d5 e4 dxe4 Nc3 e6 Be3
D00 Giertz-Peters Gambit, BDG d4 d5 e4 dxe4 Nc3 e6 f3
D00 Polish Attack, BDG d4 d5 e4 dxe4 Nc3 e6 f3 Bf5 Bg5
D00 Netherlands Variation, BDG d4 d5 e4 dxe4 Nc3 f5
D00 Mieses; Nimzovich Var, BDG d4 d5 e4 dxe4 Nc3 Nc6
D00 Vienna Variation, BDG d4 d5 e4 dxe4 Nc3 Nf6
D00 Studier-Rasa Gambit, BDG d4 d5 e4 dxe4 Nc3 Nf6 Be3
D00 Von Popiel Gambit d4 d5 e4 dxe4 Nc3 Nf6 Bg5
D00 Zilbermints Variation, BDG d4 d5 e4 dxe4 Nc3 Nf6 Bg5 Bf5 Bxf6 exf6 g4 Bg6 Qe2 Bb4 Qb5+
D00 Blackmar-Diemer Gambit d4 d5 e4 dxe4 Nc3 Nf6 f3
D00 Wiesengren Defense, BDG d4 d5 e4 dxe4 Nc3 Nf6 f3 Bc5
D00 Hans Mullers; Vienna V d4 d5 e4 dxe4 Nc3 Nf6 f3 Bf5
D00 Soller; Vienna Var, BDG d4 d5 e4 dxe4 Nc3 Nf6 f3 Bf5 Bc4
D00 Tejler Attack, BDG d4 d5 e4 dxe4 Nc3 Nf6 f3 Bf5 Bf4
D00 Sperling Attack, BDG d4 d5 e4 dxe4 Nc3 Nf6 f3 Bf5 d5
D00 Diemer Gambit, BDG d4 d5 e4 dxe4 Nc3 Nf6 f3 Bf5 fxe4
D00 Kampars Gambit, BDG d4 d5 e4 dxe4 Nc3 Nf6 f3 Bf5 g4 Bg6 g5 Nd5 fxe4
D00 Gunderam Attack, BDG d4 d5 e4 dxe4 Nc3 Nf6 f3 Bf5 g4 Bg6 h4
D00 Brombacher; Daberitz Var, BDG d4 d5 e4 dxe4 Nc3 Nf6 f3 c5
D00 O’Kelly Variation, BDG d4 d5 e4 dxe4 Nc3 Nf6 f3 c6
D00 Langeheinecke Variation, BDG d4 d5 e4 dxe4 Nc3 Nf6 f3 e3
D00 Elbert Counter-Gambit, BDG d4 d5 e4 dxe4 Nc3 Nf6 f3 e5
D00 Weinsbach Declination, BDG d4 d5 e4 dxe4 Nc3 Nf6 f3 e6
D00 Pfrang Gambit, BDG d4 d5 e4 dxe4 Nc3 Nf6 f3 e6 fxe4 Bb4 Bd3 Bxc3+ bxc3 Nxe4 Be3
D00 Ritter Defense, BDG d4 d5 e4 dxe4 Nc3 Nf6 f3 exf3 Nxf3 b6
D00 Gunderam; Tartakower Var, BDG d4 d5 e4 dxe4 Nc3 Nf6 f3 exf3 Nxf3 Bf5
D00 Teichmann Variation, BDG d4 d5 e4 dxe4 Nc3 Nf6 f3 exf3 Nxf3 Bg4
D00 Kaulich Variation, BDG d4 d5 e4 dxe4 Nc3 Nf6 f3 exf3 Nxf3 c5
D00 Ziegler; Gunderam’s 2nd Defense, BDG d4 d5 e4 dxe4 Nc3 Nf6 f3 exf3 Nxf3 c6
D00 Euwe Variation, BDG d4 d5 e4 dxe4 Nc3 Nf6 f3 exf3 Nxf3 e6
D00 Zilbermints Gambit, BDG d4 d5 e4 dxe4 Nc3 Nf6 f3 exf3 Nxf3 e6 Bg5 Be7 Bd3 Nc6 O-O Nxd4 Kh1
D00 Duthilleuk Gambit, BDG d4 d5 e4 dxe4 Nc3 Nf6 f3 exf3 Nxf3 e6 Bd3 Nc6 Bg5 Be7 Ne4
D00 Bogoljubow Variation, BDG d4 d5 e4 dxe4 Nc3 Nf6 f3 exf3 Nxf3 g6
D00 Mad Dog Attack, BDG d4 d5 e4 dxe4 Nc3 Nf6 f3 exf3 Nxf3 g6 Bc4 Bg7 h4
D00 Nimzovich Attack, BDG d4 d5 e4 dxe4 Nc3 Nf6 f3 exf3 Nxf3 g6 Bc4 Bg7 Ne5
D00 Kloss Attack, BDG d4 d5 e4 dxe4 Nc3 Nf6 f3 exf3 Nxf3 g6 Bc4 Bg7 O-O O-O Kh1
D00 Studier Attack, BDG d4 d5 e4 dxe4 Nc3 Nf6 f3 exf3 Nxf3 g6 Bc4 Bg7 O-O O-O Qe1
D00 Diemer Attack, BDG d4 d5 e4 dxe4 Nc3 Nf6 f3 exf3 Nxf3 g6 Bf4
D00 Peters Attack, BDG d4 d5 e4 dxe4 Nc3 Nf6 f3 exf3 Nxf3 g6 Ne5
D00 Gunderam Defense, BDG; Rook Pawn Defense d4 d5 e4 dxe4 Nc3 Nf6 f3 exf3 Nxf3 h5
D00 Schuttler Defense, BDG d4 d5 e4 dxe4 Nc3 Nf6 f3 exf3 Nxf3 Nbd7
D00 Pietrowsky Variation, BDG d4 d5 e4 dxe4 Nc3 Nf6 f3 exf3 Nxf3 Nc6
D00 Ryder Variation, BDG d4 d5 e4 dxe4 Nc3 Nf6 f3 exf3 Qxf3
D00 Tautvaisis Defense, BDG d4 d5 e4 dxe4 Nc3 Nf6 f3 exf3 Qxf3 Nc6
D00 Tejler Gambit, BDG d4 d5 e4 dxe4 Nc3 Nf6 f3 exf3 Qxf3 Qxd4 Be3 Qg4 Qf2 Ne4 Nxe4 Qxe4 O-O-O Nc6 Bd3
D00 Albrecht; Karlshruhle Defense, BDG d4 d5 e4 dxe4 Nc3 Nf6 f3 g6
D00 Lamb Defense, BDG d4 d5 e4 dxe4 Nc3 Nf6 f3 Nc6
D00 Mason Attack, Queen Pawn Game d4 d5 f4
D00 Zurich Gambit d4 d5 g4
D00 Chigorin; Ponziani; Veresov d4 d5 Nc3
D00 Alburt Defense, QP d4 d5 Nc3 Bf5
D00 Anti-Veresov d4 d5 Nc3 Bg4
D00 Irish Gambit, QP d4 d5 Nc3 c5
D00 Shaviliuk Gambit, QP d4 d5 Nc3 e5
D00 Dutch System, QP d4 d5 Nc3 f5
D00 Fianchetto Defense, QP d4 d5 Nc3 g6 Nf3 Bg7
D00 Shropshire Defense d4 d5 Nc3 h5
D01 Richter-Veresov Opening; D01 d4 d5 Nc3 Nf6 Bg5
D01 Veresov Variation, QP d4 d5 Nc3 Nf6 Bg5 Bf5 Bxf6
D01 Richter Variation, Veresov d4 d5 Nc3 Nf6 Bg5 Bf5 f3
D01 Classical Defense, Veresov d4 d5 Nc3 Nf6 Bg5 e6 Nf3
D01 Two Knights System, Veresov d4 d5 Nc3 Nf6 Bg5 Nbd7 Nf3
D01 Grunfeld Defense, Veresov d4 d5 Nc3 Nf6 Bg5 Nbd7 Nf3 g6
D01 Boyce Defense, Veresov d4 d5 Nc3 Nf6 Bg5 Ne4
D00 Hubsch Gambit d4 d5 Nc3 Nf6 e4 Nxe4
D02 Zukertort Variation, QP; D02 d4 d5 Nf3
D02 Anti-Torre, QP d4 d5 Nf3 Bg4
D02 Anti-Torre d4 d5 Nf3 Bg4 Ne5 Bf5 g4
D02 Queen’s Gambit Reversed; Krause Variation d4 d5 Nf3 c5
D02 Chandler Gambit, QP d4 d5 Nf3 c5 g3 cxd4 Bg2
D02 Chigorin Variation, QP d4 d5 Nf3 Nc6
D02 Symmetrical Variation, QP d4 d5 Nf3 Nf6
D02 London System; Queen’s Bishop Opening d4 d5 Nf3 Nf6 Bf4
D02 Poisoned Pawn Variation, QP d4 d5 Nf3 Nf6 Bf4 c5 e3 Qb6 Nc3
D03 Torre Attack, QP; D03 d4 d5 Nf3 Nf6 Bg5
D03 Breyer Variation, QP d4 d5 Nf3 Nf6 Bg5 e6 e3 c5 c3 Qb6
D03 Grunfeld Variation, QP d4 d5 Nf3 Nf6 Bg5 g6
D03 Gossip Variation, QP d4 d5 Nf3 Nf6 Bg5 Ne4
D02 Zilbermints Variation, QP d4 d5 Nf3 Nf6 c4 b5
D25 Queen’s Gambit Accepted Deferred d4 d5 Nf3 Nf6 c4 dxc4
D04 Colle System; D04 d4 d5 Nf3 Nf6 e3
D04 Bishop Defense, QP; Anti-Colle d4 d5 Nf3 Nf6 e3 Bf5
D05 Classical Defense, Colle System; D05 d4 d5 Nf3 Nf6 e3 e6
D05 Zukertort Variation, QP d4 d5 Nf3 Nf6 e3 e6 Bd3
D05 Rubinstein Attack, Colle d4 d5 Nf3 Nf6 e3 e6 Bd3 c5 b3
D02 Pseudo-Catalan d4 d5 Nf3 Nf6 g3
D00 Amazon Attack d4 d5 Qd3
D00 Siberian Attack d4 d5 Qd3 Nc6 Nc3
A41 Pillsbury Defense; A41; Rat Defense d4 d6
A42 A42 d4 d6 c4
A42 English Rat d4 d6 c4 e5
A42 Lisbon Gambit d4 d6 c4 e5 dxe5 Nc6
A41 Wade Defense d4 d6 Nf3 Bg4
A40 Charlick Gambit; Englund Gambit d4 e5
A40 Englund Gambit Declined d4 e5 d5
A40 Diemer Counterattack d4 e5 d5 Bc5 e4 Qh4
A40 Thuring Gambit; Hartlaub-Charlick Gambit d4 e5 dxe5 d6
A40 Soller; Purchas Gambit d4 e5 dxe5 f6
A40 Englund; Behting Gambit d4 e5 dxe5 Nc6
A40 Felbecker Gambit d4 e5 dxe5 Nc6 Nf3 Bc5
A40 Soller Gambit Deferred d4 e5 dxe5 Nc6 Nf3 f6
A40 Zilbermints Gambit II, Englund Gambit d4 e5 dxe5 Nc6 Nf3 h6
A40 Zilbermints Gambit, Englund Gambit d4 e5 dxe5 Nc6 Nf3 Nge7
A40 Englund Gambit d4 e5 dxe5 Nc6 Nf3 Qe7
A40 Stockhom Variation, Englund Gambit d4 e5 dxe5 Nc6 Nf3 Qe7 Qd5
A40 Mosquito Gambit, Englund d4 e5 dxe5 Qh4
A40 Horwitz Defense d4 e6
A40 Franco-Indian Defense d4 e6
A40 Seneschaud Variation, Dutch d4 e6 Bf4 f5 g4
A40 English Defense d4 e6 c4 b6
A40 Perrin Variation d4 e6 c4 b6 e4 Bb7 Bd3 Nc6
A40 Poli Gambit d4 e6 c4 b6 e4 Bb7 f3 f5 exf5 Nh6
A40 Hartlaub Gambit Declined d4 e6 c4 b6 Nc3 Bb7 e4 f5 d5
A40 Hartlaub Gambit Accepted d4 e6 c4 b6 Nc3 Bb7 e4 f5 exf5 Nf6
A40 Keres Defense, Indian; Kangaroo Defense d4 e6 c4 Bb4+
A40 Transpositional Variation, Keres Defense d4 e6 c4 Bb4+ Nc3
C00 Franco-Sicilian Defense d4 e6 c4 c5
A43 Franco-Sicilian Hybrid d4 e6 c4 c5 d5 exd5 cxd5 d6 Nc3 g6 e4 Bg7 Nf3 Ne7
A40 Zilbermints Gambit d4 e6 c4 e5
A84 Bellon Gambit d4 e6 c4 f5 e4
A80 Dutch Defense; A80 d4 f5
A80 Seneschaud Gambit, Dutch d4 f5 Bf4 e6 g4
A80 Hopton Attack, Dutch d4 f5 Bg5
A84 A84 d4 f5 c4
A84 Classical Variation, Dutch d4 f5 c4 e6
A84 Bellon Gambit, Dutch d4 f5 c4 e6 e4
A84 Rubinstein Variation, Dutch d4 f5 c4 e6 Nc3
A84 Stonewall Variation, Dutch d4 f5 c4 e6 Nc3 Nf6 g3 c6 Bg2 d5 O-O Bd6
A85 d4 f5 c4 g6 Nc3
A85 Bladel Variation, Dutch d4 f5 c4 g6 Nc3 Nh6
A85 Normal Variation, Dutch d4 f5 c4 Nf6
A86 Fianchetto Variation, Dutch; A86 d4 f5 c4 Nf6 g3
A90 A90 d4 f5 c4 Nf6 g3 e6
A90 Classical Variation, Dutch d4 f5 c4 Nf6 g3 e6 Bg2
A90 Nimzo-Dutch Variation d4 f5 c4 Nf6 g3 e6 Bg2 Bb4+
A91 A91 d4 f5 c4 Nf6 g3 e6 Bg2 Be7
A91 Botvinnik-Bronstein Variation, Dutch d4 f5 c4 Nf6 g3 e6 Bg2 Be7 Nc3 O-O e3
A92 A92 d4 f5 c4 Nf6 g3 e6 Bg2 Be7 Nf3
A93 Botvinnik Variation, Dutch; A93 d4 f5 c4 Nf6 g3 e6 Bg2 Be7 Nf3 O-O O-O d5 b3
A94 A94 d4 f5 c4 Nf6 g3 e6 Bg2 Be7 Nf3 O-O O-O d5 b3 c6
A95 A95 d4 f5 c4 Nf6 g3 e6 Bg2 Be7 Nf3 O-O O-O d5 Nc3
A96 A96 d4 f5 c4 Nf6 g3 e6 Bg2 Be7 Nf3 O-O O-O d6
A97 Ilyin-Zhenevsky Variation, Dutch; A97 d4 f5 c4 Nf6 g3 e6 Bg2 Be7 Nf3 O-O O-O d6 Nc3 Qe8
A99 A99 d4 f5 c4 Nf6 g3 e6 Bg2 Be7 Nf3 O-O O-O d6 Nc3 Qe8 b3
A98 A98 d4 f5 c4 Nf6 g3 e6 Bg2 Be7 Nf3 O-O O-O d6 Nc3 Qe8 Qc2
A92 Alekhine Variation, Dutch d4 f5 c4 Nf6 g3 e6 Bg2 Be7 Nf3 O-O O-O Ne4
A91 Blackburne Attack, Dutch d4 f5 c4 Nf6 g3 e6 Bg2 Bg7 Nh3
A86 Leningrad Variation, Dutch d4 f5 c4 Nf6 g3 g6
A87 A87 d4 f5 c4 Nf6 g3 g6 Bg2 Bg7 Nf3
A87 Fluid Formation, Dutch d4 f5 c4 Nf6 g3 g6 Bg2 Bg7 Nf3 O-O O-O d6
A88 Warsaw Variation, Dutch; A88 d4 f5 c4 Nf6 g3 g6 Bg2 Bg7 Nf3 O-O O-O d6 Nc3 c6
A89 Matulovic Variation, Dutch; A89 d4 f5 c4 Nf6 g3 g6 Bg2 Bg7 Nf3 O-O O-O d6 Nc3 Nc6
A84 Queen’s Knight Variation, Dutch d4 f5 c4 Nf6 Nc3
A84 Krause Variation, Dutch d4 f5 c4 Nf6 Nc3 d6 Nf3 Nc6
A85 Ozol Variation, Dutch d4 f5 c4 Nf6 Nc3 g6 Nf3 Bg7 Bg5
A82 Staunton Gambit, Dutch; A82 d4 f5 e4
A82 Balogh Defense, Dutch d4 f5 e4 d6
A82 Staunton Gambit Accepted, Dutch d4 f5 e4 fxe4
A83 General Variation, Staunton Gambit, Dutch; A83 d4 f5 e4 fxe4 Nc3 Nf6 Bg5
A83 Nimzovich Variation, Dutch d4 f5 e4 fxe4 Nc3 Nf6 Bg5 b6
A83 Chigorin Variation, Dutch d4 f5 e4 fxe4 Nc3 Nf6 Bg5 c6
A83 Lasker Variation, Dutch d4 f5 e4 fxe4 Nc3 Nf6 Bg5 g6 f3
A80 Blackmar’s Second Gambit, Dutch d4 f5 e4 fxe4 Nc3 Nf6 f3
A82 Tartakower Variation, Dutch d4 f5 e4 fxe4 Nc3 Nf6 g4
A82 American Gambit, Dutch d4 f5 e4 fxe4 Nd2
A81 Dutch Indian; Leningrad Variation, Dutch; A81 d4 f5 g3
A81 Basman Variation, Dutch d4 f5 g3 g6 Bg2 Bg7 Nf3 c6 O-O Nh6
A81 Carlsbad Variation, Dutch d4 f5 g3 g6 Bg2 Bg7 Nh3
A81 Antoshin-Hort Variation, Dutch d4 f5 g3 Nf6 Bg2 d6
A81 Ilyin-Genevsky Variation, Dutch d4 f5 g3 Nf6 Bg2 e6 Nf3 Be7 O-O O-O c4 d6
A81 Blackburne Variation, Dutch d4 f5 g3 Nf6 Bg2 e6 Nh3
A81 Semi-Leningrad Variation, Dutch d4 f5 g3 Nf6 Bg2 g6
A80 Lisbon Gambit, Dutch; Krejcik Gambit d4 f5 g4
A80 Hevendehl Gambit, Dutch d4 f5 g4 e5
A80 Tate Gambit, Dutch d4 f5 g4 fxg4 e4 d5 Nc3
A80 Korchnoi’s Variation, Dutch d4 f5 h3
A80 Janzen-Korchnoi Gambit, Dutch d4 f5 h3 Nf6 g4
A80 Raphael Variation, Dutch d4 f5 Nc3
A80 Kingfisher Gambit, Dutch d4 f5 Nc3 d5 e4
A80 Spielmann Gambit, Dutch d4 f5 Nc3 Nf6 g4
A80 Barcza Variation, Dutch d4 f5 Nf3 Nf6 c3
A80 Alapin; Ulvestad; Manhattan; Kmoch Variation, Dutch d4 f5 Qd3
A80 Anti-Stonewall, Dutch d4 f5 Qd3 d5 g4
A80 Anti-Modern, Dutch d4 f5 Qd3 d6 g4
A80 Anti-Classical Line, Dutch d4 f5 Qd3 e6 g4
A80 Anti-Leningrad Variation, Dutch d4 f5 Qd3 g6 g4
A80 Manhattan Gambit, Dutch d4 f5 Qd3 Nf6 g4
A80 Pretzel Gambit, Dutch d4 f5 Qd3 Nf6 g4
A40 Borg Gambit d4 g5
A40 Queen Pawn Fianchetto d4 g6
A40 Kotov-Robatsch Defense d4 g6 c4 Bg7
A40 Pseudo-Saemisch d4 g6 c4 Bg7 e4 d6 Be3 Nf6 f3
A40 Rossolimo Variation d4 g6 c4 Bg7 e4 d6 Nf3 Bg4
A40 Neo-Modern Defense d4 g6 c4 Bg7 e4 e5
A40 Beefeater Variation d4 g6 c4 Bg7 Nc3 c5 d5 Bxc3+ bxc3 f5
A40 Modern Defense d4 g6 c4 Bg7 Nc3 d6
A41 Averbakh Variation, Modern d4 g6 c4 Bg7 Nc3 d6 e4
A41 Pterodactyl Variation, Modern d4 g6 c4 Bg7 Nc3 d6 e4 c5 Nf3 Qa5
A42 Randspringer Variation d4 g6 c4 Bg7 Nc3 d6 e4 f5
A40 Kotov Variation, Modern d4 g6 c4 Bg7 Nc3 d6 e4 Nc6
A40 Lizard Defense; Pirc-Diemer Gambit d4 g6 h4 Nf6 h5
A40 Bogoljubov; Mikenas-Van Geet Defense d4 Nc6
A40 Lundin Defense d4 Nc6
A40 Lithuanian Variation, Mikenas d4 Nc6 c4 e5 d5 Nce7
A40 Cannstatter Variation, Mikenas d4 Nc6 c4 e5 d5 Nd4
A40 Pozarek Gambit d4 Nc6 c4 e5 dxe5 Nxe5 Nc3 Nxc4
A40 Montevideo Defense d4 Nc6 d5 Nb8
A40 Zaire Defense d4 Nc6 d5 Nb8 e4 Nf6 e5 Ng8
A45 Indian Defense; A45 d4 Nf6
A45 Basque Opening d4 Nf6 b3
A45 Trompowsky; Opocensky; Ruth Opening d4 Nf6 Bg5
A45 Poisoned Pawn Variation, Trompowsky d4 Nf6 Bg5 c5 d5 Qb6 Nc3
A45 Chepukaitis Gambit d4 Nf6 Bg5 c5 d5 Qb6 Nc3 Qxb2 Bd2 Qb6
A45 Borg Variation, Trompowsky d4 Nf6 Bg5 Ne4 Bf4 g5
A45 Edge Variation, Trompowsky d4 Nf6 Bg5 Ne4 Bh4
A45 Hergert Gambit #2, Trompowsky d4 Nf6 Bg5 Ne4 Bh4 c6 Nd2 Qa5 c3 Nxd2 Qxd2 d5 e4
A45 Hergert Gambit #1, Trompowsky d4 Nf6 Bg5 Ne4 Bh4 d5 f3 Nf6 Nc3 Bf5 e4
A45 Raptor Variation, Trompowsky d4 Nf6 Bg5 Ne4 h4
A45 Hergert Gambit, Trompowsky d4 Nf6 Bg5 Ne4 h4 Nxg5 hxg5 e5
A50 Normal Variation, Indian Game; A50 d4 Nf6 c4
A50 Pyrenees Gambit d4 Nf6 c4 b5
A50 Queen’s Indian Defense; Saemisch-Indian d4 Nf6 c4 b6
A56 Hromadka Defense; Loose Gambit: A56 d4 Nf6 c4 c5
A57 Benko Gambit; Volga; Opocensky; Vaitonis; A57 d4 Nf6 c4 c5 d5 b5
A57 Sosonko Variation, Benko Gambit d4 Nf6 c4 c5 d5 b5 a4
A57 Bishop Attack, Benko Gambit d4 Nf6 c4 c5 d5 b5 Bg5
A57 Benko Gambit Accepted d4 Nf6 c4 c5 d5 b5 cxb5
A57 Pawn Return Variation, Benko Gambit d4 Nf6 c4 c5 d5 b5 cxb5 a6 b6
A58 Fully Accepted Variation, Benko Gambit; A58 d4 Nf6 c4 c5 d5 b5 cxb5 a6 bxa6
A59 A59 d4 Nf6 c4 c5 d5 b5 cxb5 a6 bxa6 Bxa6 Nc3 d6 e4
A59 King Walk Variation, Benko Gambit d4 Nf6 c4 c5 d5 b5 cxb5 a6 bxa6 Bxa6 Nc3 d6 e4 Bxf1 Kxf1 g6 g3 Bg7 Kg2 O-O
A57 Central Storming Variation, Benko Gambit d4 Nf6 c4 c5 d5 b5 cxb5 a6 bxa6 Bxa6 Nc3 d6 f4
A58 Fianchetto Variation, Benko Gambit d4 Nf6 c4 c5 d5 b5 cxb5 a6 bxa6 Bxa6 Nc3 g6 Nf3 d6 g3 Bg7 Bg2
A57 Modern Variation, Benko Gambit d4 Nf6 c4 c5 d5 b5 cxb5 a6 e3
A57 Dlugy Variation, Benko Gambit d4 Nf6 c4 c5 d5 b5 cxb5 a6 f3
A57 Zaitsev System, Benko Gambit d4 Nf6 c4 c5 d5 b5 cxb5 a6 Nc3
A57 Nescafe Frappe Attack, Benko Gambit d4 Nf6 c4 c5 d5 b5 cxb5 a6 Nc3 axb5 e4 b4 Nb5
A57 Zaitsev Variation, Benko Gambit d4 Nf6 c4 c5 d5 b5 cxb5 a6 Nc3 axb5 e4 b4 Nb5 d6 Nf3 g6 Bc4
A57 Benko Gambit Declined; Hjoerring Countergambit d4 Nf6 c4 c5 d5 b5 e4
A57 Pseudo-Saemisch, Benko Gambit d4 Nf6 c4 c5 d5 b5 f3
A57 Mutkin Countergambit, Benko Gambit d4 Nf6 c4 c5 d5 b5 g4
A57 Quiet Line, Benko Gambit d4 Nf6 c4 c5 d5 b5 Nd2
A57 Main Line, Benko Gambit Declined d4 Nf6 c4 c5 d5 b5 Nf3
A56 Hromadka System, Benoni d4 Nf6 c4 c5 d5 d6
A56 Lundin; Bronstein Counter-Gambit d4 Nf6 c4 c5 d5 d6 Nc3 g6 e4 b5
A56 Petrosian System; Czech Benoni Defense d4 Nf6 c4 c5 d5 e5
A56 Czech Variation, Benoni d4 Nf6 c4 c5 d5 e5 Nc3 d6 e4 Be7
A56 King’s Indian System, Benoni d4 Nf6 c4 c5 d5 e5 Nc3 d6 e4 g6
A60 Tal Variation, Modern Variation, Benoni; A60 d4 Nf6 c4 c5 d5 e6
A61 A61 d4 Nf6 c4 c5 d5 e6 Nc3
A61 Snake Variation, Benoni d4 Nf6 c4 c5 d5 e6 Nc3 exd5 cxd5 Bd6
A60 Modern Benoni d4 Nf6 c4 c5 d5 e6 Nc3 exd5 cxd5 d6
A65 King Pawn lines, Benoni; A65 d4 Nf6 c4 c5 d5 e6 Nc3 exd5 cxd5 d6 e4
A66 Pawn Storm Variation, Benoni; A66 d4 Nf6 c4 c5 d5 e6 Nc3 exd5 cxd5 d6 e4 g6 f4
A67 Taimanov Variation, Benoni; A67 d4 Nf6 c4 c5 d5 e6 Nc3 exd5 cxd5 d6 e4 g6 f4 Bg7 Bb5
A66 Mikenas V, Benoni d4 Nf6 c4 c5 d5 e6 Nc3 exd5 cxd5 d6 e4 g6 f4 Bg7 e5
A68 A68 d4 Nf6 c4 c5 d5 e6 Nc3 exd5 cxd5 d6 e4 g6 f4 Bg7 Nf3
A68 Four Pawns Attack, Benoni d4 Nf6 c4 c5 d5 e6 Nc3 exd5 cxd5 d6 e4 g6 f4 Bg7 Nf3 O-O
A69 A69 d4 Nf6 c4 c5 d5 e6 Nc3 exd5 cxd5 d6 e4 g6 f4 Bg7 Nf3 O-O Be2 Re8
A70 Classical Variation, Benoni; A70 d4 Nf6 c4 c5 d5 e6 Nc3 exd5 cxd5 d6 e4 g6 Nf3
A72 A72 d4 Nf6 c4 c5 d5 e6 Nc3 exd5 cxd5 d6 e4 g6 Nf3 Bg7 Be2
A73 A73 d4 Nf6 c4 c5 d5 e6 Nc3 exd5 cxd5 d6 e4 g6 Nf3 Bg7 Be2 O-O O-O
A74 A74 d4 Nf6 c4 c5 d5 e6 Nc3 exd5 cxd5 d6 e4 g6 Nf3 Bg7 Be2 O-O O-O a6
A75 Argentine Attack, Benoni; A75 d4 Nf6 c4 c5 d5 e6 Nc3 exd5 cxd5 d6 e4 g6 Nf3 Bg7 Be2 O-O O-O a6 a4 Bg4
A76 Czerniak Defesne, Benoni; A76 d4 Nf6 c4 c5 d5 e6 Nc3 exd5 cxd5 d6 e4 g6 Nf3 Bg7 Be2 O-O O-O Re8
A77 A77 d4 Nf6 c4 c5 d5 e6 Nc3 exd5 cxd5 d6 e4 g6 Nf3 Bg7 Be2 O-O O-O Re8 Nd2
A78 A78 d4 Nf6 c4 c5 d5 e6 Nc3 exd5 cxd5 d6 e4 g6 Nf3 Bg7 Be2 O-O O-O Re8 Nd2 Na6
A79 A79 d4 Nf6 c4 c5 d5 e6 Nc3 exd5 cxd5 d6 e4 g6 Nf3 Bg7 Be2 O-O O-O Re8 Nd2 Na6 f3
A71 A71 d4 Nf6 c4 c5 d5 e6 Nc3 exd5 cxd5 d6 e4 g6 Nf3 Bg7 Bg5
A61 Penrose Variation, Benoni d4 Nf6 c4 c5 d5 e6 Nc3 exd5 cxd5 d6 Nf3 g6 Bd3
A61 Uhlmann Variation, Benoni d4 Nf6 c4 c5 d5 e6 Nc3 exd5 cxd5 d6 Nf3 g6 Bg5
A62 A62 d4 Nf6 c4 c5 d5 e6 Nc3 exd5 cxd5 d6 Nf3 g6 g3
A62 Fianchetto Variation, Benoni d4 Nf6 c4 c5 d5 e6 Nc3 exd5 cxd5 d6 Nf3 g6 g3 Bg7 Bg2
A63 A63 d4 Nf6 c4 c5 d5 e6 Nc3 exd5 cxd5 d6 Nf3 g6 g3 Bg7 Bg2 O-O O-O a6
A64 A64 d4 Nf6 c4 c5 d5 e6 Nc3 exd5 cxd5 d6 Nf3 g6 g3 Bg7 Bg2 O-O O-O a6 a4 Nbd7 Nd2
A62 Hastings Defense, Benoni d4 Nf6 c4 c5 d5 e6 Nc3 exd5 cxd5 d6 Nf3 g6 g3 Bg7 Bg2 O-O O-O Nbd7
A61 Nimzovich Variation, Knight’s Tour Variation, Benoni d4 Nf6 c4 c5 d5 e6 Nc3 exd5 cxd5 d6 Nf3 g6 Nd2
A56 Vulture Variation; Der Geier d4 Nf6 c4 c5 d5 Ne4
A56 Weenink Variation, Benoni d4 Nf6 c4 c5 dxc5 e6
A53 Old Indian Defense; Chigorin Indian Defense; A53 d4 Nf6 c4 d6
A53 Aged Gibbon Gambit d4 Nf6 c4 d6 g4
A53 Janowski Variation, Old Indian d4 Nf6 c4 d6 Nc3 Bf5
A53 Grinberg Gambit, Old Indian d4 Nf6 c4 d6 Nc3 Bf5 e4
A53 Ukranian Variation d4 Nf6 c4 d6 Nc3 e5
A54 Two Knights Variation, Old Indian; A54 d4 Nf6 c4 d6 Nc3 e5 Nf3
A55 Normal Variation, Old Indian; A55 d4 Nf6 c4 d6 Nc3 e5 Nf3 Nbd7 e4
A53 Duz-Khotimirsky Variation d4 Nf6 c4 d6 Nc3 Nbd7 e3 e5 Bd3
A53 Tartakower-Indian d4 Nf6 c4 d6 Nf3 Bg4
A51 Budapest Defense; A51 d4 Nf6 c4 e5
A51 Fajarowicz Variation, Budapest d4 Nf6 c4 e5 dxe5 Ne4
A51 Bonsdorf Variation, Budapest d4 Nf6 c4 e5 dxe5 Ne4 a3 b6
A51 Steiner Variation, Budapest d4 Nf6 c4 e5 dxe5 Ne4 Qc2
A52 Normal Variation, Budapest; A52 d4 Nf6 c4 e5 dxe5 Ng4
A52 Rubinstein Variation, Budapest d4 Nf6 c4 e5 dxe5 Ng4 Bf4
A52 Kornl Richter Gambit, Budapest d4 Nf6 c4 e5 dxe5 Ng4 Bf4 Nc6 Nf3 Bb4+ Nc3 Bxc3+
A52 Center Play Variation, Budapest; Alekhine Variation d4 Nf6 c4 e5 dxe5 Ng4 e4
A52 Balogh; Tartakower C-G, Budapest d4 Nf6 c4 e5 dxe5 Ng4 e4 d6
A52 Barmina Gambit, Budapest d4 Nf6 c4 e5 dxe5 Ng4 e4 Nxe5 f4 Bc5
A52 Wikstrom Gambit, Budapest d4 Nf6 c4 e5 dxe5 Ng4 e4 Nxe5 f4 Nbc6
A52 Abonyi Variation, Budapest d4 Nf6 c4 e5 dxe5 Ng4 e4 Nxe5 f4 Nec6
A52 Adler Variation, Budapest d4 Nf6 c4 e5 dxe5 Ng4 Nf3
E00 East Indian Defense; E00 d4 Nf6 c4 e6
E00 Seirawan Attack d4 Nf6 c4 e6 Bg5
E00 Catalan Opening d4 Nf6 c4 e6 g3
E01 E01 d4 Nf6 c4 e6 g3 d5
E06 Closed Variation, Catalan d4 Nf6 c4 e6 g3 d5 Bg2
E06 E06 d4 Nf6 c4 e6 g3 d5 Bg2 Be7
E07 E07 d4 Nf6 c4 e6 g3 d5 Bg2 Be7 Nf3 O-O O-O Nbd7
E07 Botvinnik Variation, Catalan d4 Nf6 c4 e6 g3 d5 Bg2 Be7 Nf3 O-O O-O Nbd7 Nc3 c6 Qd3
E08 E08 d4 Nf6 c4 e6 g3 d5 Bg2 Be7 Nf3 O-O O-O Nbd7 Qc2
E09 E09 d4 Nf6 c4 e6 g3 d5 Bg2 Be7 Nf3 O-O O-O Nbd7 Qc2 c6 Nbd2
E09 Sokolsky Variation, Catalan d4 Nf6 c4 e6 g3 d5 Bg2 Be7 Nf3 O-O O-O Nbd7 Qc2 c6 Nbd2 b6 Nbd2 b6 b3 a5 Bb2 Ba6
E08 Zagoriansky Variation, Catalan d4 Nf6 c4 e6 g3 d5 Bg2 Be7 Nf3 O-O O-O Nbd7 Qc2 c6 Rd1 b6 a4
E06 Tarrasch Defense, Catalan d4 Nf6 c4 e6 g3 d5 Bg2 c5 Nf3 Nc6
E02 E02 d4 Nf6 c4 e6 g3 d5 Bg2 dxc4
E04 Open Defense, Catalan; E04 d4 Nf6 c4 e6 g3 d5 Bg2 dxc4 Nf3
E05 Classical Line, Catalan; E05 d4 Nf6 c4 e6 g3 d5 Bg2 dxc4 Nf3 Be7
E05 Modern Sharp Variation, Catalan d4 Nf6 c4 e6 g3 d5 Bg2 dxc4 Nf3 Nc6 Qa4 Bb4+
E03 E03 d4 Nf6 c4 e6 g3 d5 Bg2 dxc4 Qa4+ Nbd7 Qxc4
E03 Alekhine Variation, Catalan d4 Nf6 c4 e6 g3 d5 Bg2 dxc4 Qa4+ Nbd7 Qxc4 a6 Qc2
E00 Hungarian Gambit, Catalan d4 Nf6 c4 e6 g3 e5
E00 Devin Gambit, Catalan d4 Nf6 c4 e6 g4
E20 E20 d4 Nf6 c4 e6 Nc3
E20 Nimzo-Indian Defense d4 Nf6 c4 e6 Nc3 Bb4
E24 Saemisch Variation, Nimzo-Indian; E24 d4 Nf6 c4 e6 Nc3 Bb4 a3
E24 Accelerated Saemisch Variation, Nimzo-Indian d4 Nf6 c4 e6 Nc3 Bb4 a3 Bxc3+ bxc3
E26 Saemisch Variation, Nimzo-Indian; E26 d4 Nf6 c4 e6 Nc3 Bb4 a3 Bxc3+ bxc3 c5 e3
E26 O’Kelly Variation, Nimzo-Indian d4 Nf6 c4 e6 Nc3 Bb4 a3 Bxc3+ bxc3 c5 e3 b6
E26 Capablanca Variation, Nimzo-Indian d4 Nf6 c4 e6 Nc3 Bb4 a3 Bxc3+ bxc3 c5 e3 Nc6 Bd3 O-O Ne2 b6 e4 Ne8
E25 E25 d4 Nf6 c4 e6 Nc3 Bb4 a3 Bxc3+ bxc3 c5 f3 d5 cxd5
E25 Keres Variation, Nimzo-Indian d4 Nf6 c4 e6 Nc3 Bb4 a3 Bxc3+ bxc3 c5 f3 d5 cxd5 Nxd5 dxc5
E25 Romanovsky Variation, Nimzo-Indian d4 Nf6 c4 e6 Nc3 Bb4 a3 Bxc3+ bxc3 c5 f3 d5 cxd5 Nxd5 dxc5 f5
E24 Botvinnik Variation, Nimzo-Indian d4 Nf6 c4 e6 Nc3 Bb4 a3 Bxc3+ bxc3 c5 f3 d5 e3 O-O cxd5 Nxd5
E27 E27 d4 Nf6 c4 e6 Nc3 Bb4 a3 Bxc3+ bxc3 O-O
E28 E28 d4 Nf6 c4 e6 Nc3 Bb4 a3 Bxc3+ bxc3 O-O e3
E29 E29 d4 Nf6 c4 e6 Nc3 Bb4 a3 Bxc3+ bxc3 O-O e3 c5 Bd3 Nc6
E29 Capablanca Variation, Nimzo-Indian d4 Nf6 c4 e6 Nc3 Bb4 a3 Bxc3+ bxc3 O-O e3 c5 Bd3 Nc6 Ne2 b6 e4 Ne8
E30 Leningrad Variation, Nimzo-Indian; E30 d4 Nf6 c4 e6 Nc3 Bb4 Bg5
E30 Averbakh Gambit, Nimzo-Indian d4 Nf6 c4 e6 Nc3 Bb4 Bg5 h6 Bh4 c5 d5 b5
E31 Benoni Defense, Nimzo-Indian; E31 d4 Nf6 c4 e6 Nc3 Bb4 Bg5 h6 Bh4 c5 d5 d6
E40 Rubinstein Variation, Nimzo-Indian; E40 d4 Nf6 c4 e6 Nc3 Bb4 e3
E43 St. Petersburg Variation, Nimzo-Indian; E43 d4 Nf6 c4 e6 Nc3 Bb4 e3 b6
E44 Fischer Variation, Nimzo-Indian; E44 d4 Nf6 c4 e6 Nc3 Bb4 e3 b6 Ne2
E45 Bronstein Variation, Nimzo-Indian; E45; Byrne Variation d4 Nf6 c4 e6 Nc3 Bb4 e3 b6 Ne2 Ba6
E41 Huebner Variation, Nimzo-Indian; E41 d4 Nf6 c4 e6 Nc3 Bb4 e3 c5
E41 Huebner Variation, Nimzo-Indian d4 Nf6 c4 e6 Nc3 Bb4 e3 c5 Bd3 Nc6 Nf3 Bxc3
E42 Rubinstein Variation, Nimzo-Indian; E42 d4 Nf6 c4 e6 Nc3 Bb4 e3 c5 Ne2
E42 Sherbakov Attack, Nimzo-Indian d4 Nf6 c4 e6 Nc3 Bb4 e3 c5 Ne2 cxd4 exd4 O-O c5
E41 Panov Attack, Nimzo-Indian d4 Nf6 c4 e6 Nc3 Bb4 e3 c5 Nf3 cxd4 exd4 d5
E40 Keres Variation, Nimzo-Indian d4 Nf6 c4 e6 Nc3 Bb4 e3 d5 a3 Bxc3+ bxc3 c5 cxd5 exd5 Bd3 O-O Ne2 b6
E40 Taimanov Variation, Nimzo-Indian d4 Nf6 c4 e6 Nc3 Bb4 e3 Nc6
E40 Ragozin Variation, Nimzo-Indian d4 Nf6 c4 e6 Nc3 Bb4 e3 Nc6 Nf3 O-O Bd3 d5 O-O dxc4
E46 Normal Variation, Nimzo-Indian; E46 d4 Nf6 c4 e6 Nc3 Bb4 e3 O-O
E47 Bishop Attack, Nimzo-Indian; E47 d4 Nf6 c4 e6 Nc3 Bb4 e3 O-O Bd3
E48 Classical Defense, Nimzo-Indian; E48 d4 Nf6 c4 e6 Nc3 Bb4 e3 O-O Bd3 d5
E49 Botvinnik System, Nimzo-Indian; E49 d4 Nf6 c4 e6 Nc3 Bb4 e3 O-O Bd3 d5 a3 Bxc3+ bxc3
E48 Olafsson Variation, Nimzo-Indian d4 Nf6 c4 e6 Nc3 Bb4 e3 O-O Bd3 d5 Nf3 c5 O-O dxc4 Bxc4 b6 Qe2 Bb7 Rd1 Qc8
E48 Bronstein Variation, Nimzo-Indian d4 Nf6 c4 e6 Nc3 Bb4 e3 O-O Bd3 d5 Nf3 c5 O-O dxc4 Bxc4 Bd7
E48 Bronstein Variation, Nimzo-Indian d4 Nf6 c4 e6 Nc3 Bb4 e3 O-O Bd3 d5 Nf3 c5 O-O dxc4 Bxc4 Nbd7 Ne2
E48 Smyslov Variation, Nimzo-Indian d4 Nf6 c4 e6 Nc3 Bb4 e3 O-O Bd3 d5 Nf3 c5 O-O dxc4 Bxc4 Qe7
E46 Reshevsky Variation, Nimzo-Indian d4 Nf6 c4 e6 Nc3 Bb4 e3 O-O Ne2
E46 Simagin Variation, Nimzo-Indian d4 Nf6 c4 e6 Nc3 Bb4 e3 O-O Ne2 d5 a3 Bd6
E50 E50 d4 Nf6 c4 e6 Nc3 Bb4 e3 O-O Nf3
E50 Huebner Deferred, Nimzo-Indian d4 Nf6 c4 e6 Nc3 Bb4 e3 O-O Nf3 c5
E51 Ragozin Variation, Nimzo-Indian; E51 d4 Nf6 c4 e6 Nc3 Bb4 e3 O-O Nf3 d5
E51 Saemisch Deferred, Nimzo-Indian d4 Nf6 c4 e6 Nc3 Bb4 e3 O-O Nf3 d5 a3
E52 Schlechter Defense, Nimzo-Indian; E52 d4 Nf6 c4 e6 Nc3 Bb4 e3 O-O Nf3 d5 Bd3 b6
E53 Bernstein Defense; Gligoric System; E53 d4 Nf6 c4 e6 Nc3 Bb4 e3 O-O Nf3 d5 Bd3 c5
E53 Keres Variation, Nimzo-Indian d4 Nf6 c4 e6 Nc3 Bb4 e3 O-O Nf3 d5 Bd3 c5 O-O b6
E54 E54 d4 Nf6 c4 e6 Nc3 Bb4 e3 O-O Nf3 d5 Bd3 c5 O-O dxc4 Bxc4
E55 Bronstein Variation, Nimzo-Indian; E55 d4 Nf6 c4 e6 Nc3 Bb4 e3 O-O Nf3 d5 Bd3 c5 O-O dxc4 Bxc4 Nbd7
E55 Smyslov Variation, Nimzo-Indian d4 Nf6 c4 e6 Nc3 Bb4 e3 O-O Nf3 d5 Bd3 c5 O-O dxc4 Bxc4 Qe7
E56 Bernstein Variation, Nimzo-Indian; E56 d4 Nf6 c4 e6 Nc3 Bb4 e3 O-O Nf3 d5 Bd3 c5 O-O Nc6
E58 E58 d4 Nf6 c4 e6 Nc3 Bb4 e3 O-O Nf3 d5 Bd3 c5 O-O Nc6 a3 Bxc3 bxc3
E59 E59 d4 Nf6 c4 e6 Nc3 Bb4 e3 O-O Nf3 d5 Bd3 c5 O-O Nc6 a3 Bxc3 bxc3 dxc4 Bxc4
E57 E57 d4 Nf6 c4 e6 Nc3 Bb4 e3 O-O Nf3 d5 Bd3 c5 O-O Nc6 a3 dxc4 Bxc4 cxd4
E46 Reshevsky Variation, Nimzo-Indian d4 Nf6 c4 e6 Nc3 Bb4 e3 O-O Nge2
E46 Simagin Variation, Nimzo-Indian d4 Nf6 c4 e6 Nc3 Bb4 e3 O-O Nge2 d5 a3 Bd6
E20 Kmoch Variation, Nimzo-Indian d4 Nf6 c4 e6 Nc3 Bb4 f3
E20 Steiner Variation, Nimzo-Indian; Romanishin Variation d4 Nf6 c4 e6 Nc3 Bb4 g3
E21 Three Knights Variation, Nimzo-Indian; E21 d4 Nf6 c4 e6 Nc3 Bb4 Nf3
E21 Korchnoi Variation, Nimzo-Indian d4 Nf6 c4 e6 Nc3 Bb4 Nf3 c5 d5
E21 Shocron Gambit, Nimzo-Indian d4 Nf6 c4 e6 Nc3 Bb4 Nf3 c5 d5 b5
E21 Euwe Variation, Nimzo-Indian d4 Nf6 c4 e6 Nc3 Bb4 Nf3 c5 d5 Ne4
E20 Romanishin Variation, Nimzo-Indian d4 Nf6 c4 e6 Nc3 Bb4 Nf3 c5 g3 O-O Bg2
E20 English Hybrid, Nimzo-Indian d4 Nf6 c4 e6 Nc3 Bb4 Nf3 c5 g3 O-O Bg2 cxd4 Nxd4 d5 cxd5 Nxd5
E20 Ragozin Variation, Nimzo-Indian d4 Nf6 c4 e6 Nc3 Bb4 Nf3 d5
E22 Spielmann Variation, Nimzo-Indian; E22 d4 Nf6 c4 e6 Nc3 Bb4 Qb3
E23 Romanovsky Gambit, Nimzo-Indian; E23 d4 Nf6 c4 e6 Nc3 Bb4 Qb3 c5 dxc5 Nc6
E23 San Remo Variation, Nimzo-Indian; Stahlberg Variation d4 Nf6 c4 e6 Nc3 Bb4 Qb3 c5 dxc5 Nc6 Nf3 Ne4 Bd2 Nxc5
E23 Stahlberg Variation, Nimzo-Indian d4 Nf6 c4 e6 Nc3 Bb4 Qb3 c5 dxc5 Nc6 Nf3 Ne4 Bd2 Nxc5 Qc2 f5 g3
E23 Carlsbad Variation, Nimzo-Indian d4 Nf6 c4 e6 Nc3 Bb4 Qb3 c5 dxc5 Nc6 Nf3 Ne4 Bd2 Nxd2
E23 Stahlberg Variation, Nimzo-Indian d4 Nf6 c4 e6 Nc3 Bb4 Qb3 c5 dxc5 Nc6 Nf3 Ne4 Bd2 Nxd2 Nxd2 O-O O-O-O
E32 Classical Variation, Nimzo-Indian; E32 d4 Nf6 c4 e6 Nc3 Bb4 Qc2
E38 Berlin Variation, Nimzo-Indian; E38 d4 Nf6 c4 e6 Nc3 Bb4 Qc2 c5
E38 Steiner Variation, Nimzo-Indian d4 Nf6 c4 e6 Nc3 Bb4 Qc2 c5 dxc5 Bxc3+
E39 Pirc Variation, Nimzo-Indian; E39 d4 Nf6 c4 e6 Nc3 Bb4 Qc2 c5 dxc5 O-O
E34 Noa Variation, Nimzo-Indian; E34 d4 Nf6 c4 e6 Nc3 Bb4 Qc2 d5
E36 E36 d4 Nf6 c4 e6 Nc3 Bb4 Qc2 d5 a3
E36 Botvinnik Variation, Nimzo-Indian d4 Nf6 c4 e6 Nc3 Bb4 Qc2 d5 a3 Bxc3+ Qxc3 Nc6
E37 E37 d4 Nf6 c4 e6 Nc3 Bb4 Qc2 d5 a3 Bxc3+ Qxc3 Ne4
E37 San Remo Variation, Nimzo-Indian d4 Nf6 c4 e6 Nc3 Bb4 Qc2 d5 a3 Bxc3+ Qxc3 Ne4 Qc2 Nc6 e3 e5
E35 E35 d4 Nf6 c4 e6 Nc3 Bb4 Qc2 d5 cxd5 exd5
E35 Romanishin Variation, Nimzo-Indian d4 Nf6 c4 e6 Nc3 Bb4 Qc2 d5 cxd5 exd5 Nf3 Qf5
E35 Beliavsky Gambit, Nimzo-Indian d4 Nf6 c4 e6 Nc3 Bb4 Qc2 d5 cxd5 exd5 Nf3 Qf5 Qd1 e5
E33 Milner-Barry, Zurich Variation, Nimzo-Indian; E33 d4 Nf6 c4 e6 Nc3 Bb4 Qc2 Nc6
E33 Milner-Barry Variation, Nimzo-Indian d4 Nf6 c4 e6 Nc3 Bb4 Qc2 Nc6 Nf3 d6
E33 Old Zurich Variation, Nimzo-Indian d4 Nf6 c4 e6 Nc3 Bb4 Qc2 Nc6 Nf3 d6 a3
E33 Vitolinsh-Adorjan Gambit, Nimzo Indian d4 Nf6 c4 e6 Nc3 Bb4 Qc2 O-O a3 Bxc3+ Qxc3 b5
E33 Keres Defense, Nimzo-Indian d4 Nf6 c4 e6 Nc3 Bb4 Qc2 O-O a3 Bxc3+ Qxc3 b6
E10 Anti-Nimzo-Indian; E10 d4 Nf6 c4 e6 Nf3
E10 Dzindzi-Indian Defense d4 Nf6 c4 e6 Nf3 a6
E12 Queen’s Indian Defense; E12 d4 Nf6 c4 e6 Nf3 b6
E12 Petrosian Variation, QID d4 Nf6 c4 e6 Nf3 b6 a3
E12 Farago Defense, QID d4 Nf6 c4 e6 Nf3 b6 a3 Ba6 Qc2 Bb7
E12 Murey Variation, QID d4 Nf6 c4 e6 Nf3 b6 a3 Bb7 Nc3 d5 cxd5 Nxd5 Qc2 c5 e4 Nxc3 bxc3 Nc6 Bb2 cxd4 cxd4 Rc8 1Rd1 Bd6
E12 Miles Variation, QID d4 Nf6 c4 e6 Nf3 b6 Bf4
E14 Spassky System, QID; E14 d4 Nf6 c4 e6 Nf3 b6 e3
E14 Averbakh Variation, QID d4 Nf6 c4 e6 Nf3 b6 e3 Bb7 Bd3 c5 O-O Be7 b3 O-O Bb2 cxd4 Nxd4
E15 Fianchetto System, QID; E15 d4 Nf6 c4 e6 Nf3 b6 g3
E15 Nimzovich Variation, QID d4 Nf6 c4 e6 Nf3 b6 g3 Ba6
E15 Quiet Line, QID d4 Nf6 c4 e6 Nf3 b6 g3 Ba6 b3
E15 Nimzovich Attack, QID d4 Nf6 c4 e6 Nf3 b6 g3 Ba6 Qa4+
E15 Timman’s Line, QID d4 Nf6 c4 e6 Nf3 b6 g3 Ba6 Qb3
E16 Fianchetto Traditional, QID; E16 d4 Nf6 c4 e6 Nf3 b6 g3 Bb7
E16 Capablanca Variation, QID d4 Nf6 c4 e6 Nf3 b6 g3 Bb7 Bg2 Bb4+
E16 Yates Variation, QID d4 Nf6 c4 e6 Nf3 b6 g3 Bb7 Bg2 Bb4+ Bd2 a5
E16 Riumin Variation, QID d4 Nf6 c4 e6 Nf3 b6 g3 Bb7 Bg2 Bb4+ Bd2 Be7
E17 Traditional Variation, QID; E17 d4 Nf6 c4 e6 Nf3 b6 g3 Bb7 Bg2 Be7
E17 Anti-Queen’s Indian System d4 Nf6 c4 e6 Nf3 b6 g3 Bb7 Bg2 Be7 Nc3
E17 Opocensky Variation, QID d4 Nf6 c4 e6 Nf3 b6 g3 Bb7 Bg2 Be7 Nc3 Ne4 Bd2
E17 Classical Variation, QID d4 Nf6 c4 e6 Nf3 b6 g3 Bb7 Bg2 Be7 O-O
E17 Euwe Variation, QID d4 Nf6 c4 e6 Nf3 b6 g3 Bb7 Bg2 Be7 O-O O-O b3
E17 Taimanov Gambit, QID d4 Nf6 c4 e6 Nf3 b6 g3 Bb7 Bg2 Be7 O-O O-O d5 exd5 Nd4
E17 Polugaevsky Gambit, QID d4 Nf6 c4 e6 Nf3 b6 g3 Bb7 Bg2 Be7 O-O O-O d5 exd5 Nh4
E18 E18 d4 Nf6 c4 e6 Nf3 b6 g3 Bb7 Bg2 Be7 O-O O-O Nc3
E18 Tiviakov Defense, QID d4 Nf6 c4 e6 Nf3 b6 g3 Bb7 Bg2 Be7 O-O O-O Nc3 Na6
E19 E19 d4 Nf6 c4 e6 Nf3 b6 g3 Bb7 Bg2 Be7 O-O O-O Nc3 Ne4 Qc2
E17 Kramnik Variation, QID d4 Nf6 c4 e6 Nf3 b6 g3 Bb7 Bg2 Be7 O-O O-O Re1
E15 Saemisch Variation, QID d4 Nf6 c4 e6 Nf3 b6 g3 Bb7 Bg2 c5
E16 Buerger Variation, QID d4 Nf6 c4 e6 Nf3 b6 g3 Bb7 Bg2 c5 d5 exd5 Ng5
E16 Rubinstein Variation, QID d4 Nf6 c4 e6 Nf3 b6 g3 Bb7 Bg2 c5 d5 exd5 Nh4
E16 Fine Variation, QID d4 Nf6 c4 e6 Nf3 b6 g3 Bb7 Bg2 Qc8 O-O c5 d5
E12 Kasparov Variation, QID d4 Nf6 c4 e6 Nf3 b6 Nc3
E12 Kasparov-Petrosian Variation, QID d4 Nf6 c4 e6 Nf3 b6 Nc3 Bb7 a3
E12 Polovodin Gambit, QID d4 Nf6 c4 e6 Nf3 b6 Nc3 Bb7 a3 d5 cxd5 Nxd5 e4
E12 Hedgehog Variation, QID d4 Nf6 c4 e6 Nf3 b6 Nc3 Bb7 a3 g6
E13 E13 d4 Nf6 c4 e6 Nf3 b6 Nc3 Bb7 Bg5 h6 Bh4 Bb4
E12 Botvinnik Variation, QID d4 Nf6 c4 e6 Nf3 b6 Nc3 Bb7 Bg5 h6 Bh4 g5 Bg3 Nh5
E11 Bogoljubow Defense; Bogo-Indian Defense; E11 d4 Nf6 c4 e6 Nf3 Bb4+
E11 Monticelli Trap d4 Nf6 c4 e6 Nf3 Bb4+ Bd2 Bxd2+ Qxd2 b6 g3 Bb7 Bg2 O-O Nc3 Ne4 Qc2 Nxc3 Bg5
E11 Nimzovich Variation, Bogo-Indian d4 Nf6 c4 e6 Nf3 Bb4+ Bd2 Qe7
E11 Grunfeld Variation, Bogo-Indian d4 Nf6 c4 e6 Nf3 Bb4+ Nbd2
E10 Blumenfeld Variation d4 Nf6 c4 e6 Nf3 c5
E10 Blumenfeld Countergambit d4 Nf6 c4 e6 Nf3 c5 d5 b5
E10 Dus-Chotimursky Variation d4 Nf6 c4 e6 Nf3 c5 d5 b5 Bg5
E10 Spielmann Variation, Blumenfeld d4 Nf6 c4 e6 Nf3 c5 d5 b5 Bg5 exd5 cxd5 h6
E10 Blumenfeld Countergambit Accepted d4 Nf6 c4 e6 Nf3 c5 d5 b5 dxe6 fxe6 cxb5 d5
E10 Rubinstein Variation, Blumenfeld d4 Nf6 c4 e6 Nf3 c5 d5 b5 e4
E10 Dory (Doery) Defense d4 Nf6 c4 e6 Nf3 Ne4
A50 Medusa Gambit d4 Nf6 c4 g5
D70 King’s Indian Defense; West Indian Defense; D70 d4 Nf6 c4 g6
E60 King’s Indian Defense; West Indian Defense; E60 d4 Nf6 c4 g6
D70 Anti-Grunfeld Variation d4 Nf6 c4 g6 d5
D70 Danube Gambit; Adorjan Gambit d4 Nf6 c4 g6 d5 b5
D70 Danube; Donau Gambit d4 Nf6 c4 g6 d5 b5 cxb5 a6 bxa6 c6
D70 Nimzovich Attack; Anti-Grunfeld; Alekhine Variation d4 Nf6 c4 g6 f3
D70 Goglidze Attack d4 Nf6 c4 g6 f3 d5
D70 Leko Gambit d4 Nf6 c4 g6 f3 e5
E60 Fianchetto Variation, KID d4 Nf6 c4 g6 g3
E60 Counterthrust Variation d4 Nf6 c4 g6 g3 Bg7 Bg2 d5
E60 Kemeri Variation d4 Nf6 c4 g6 g3 Bg7 Bg2 d5 cxd5 Nxd5 Nf3 O-O O-O c5
E60 Yugoslav Variation d4 Nf6 c4 g6 g3 Bg7 Bg2 d6 Nf3 O-O Nc3 c5
E60 Bronstein Variation d4 Nf6 c4 g6 g3 Bg7 Bg2 d6 Nf3 O-O Nc3 c6 O-O Qa5
E60 Panno Variation d4 Nf6 c4 g6 g3 Bg7 Bg2 d6 Nf3 O-O Nc3 Nc6 O-O a6 h3 Rb8
E60 Spassky Variation d4 Nf6 c4 g6 g3 Bg7 Bg2 d6 Nf3 O-O Nc3 Nc6 O-O Bf5
E60 Simagin Variation d4 Nf6 c4 g6 g3 Bg7 Bg2 d6 Nf3 O-O Nc3 Nc6 O-O Bg4
E60 Szabo Variation d4 Nf6 c4 g6 g3 Bg7 Bg2 d6 Nf3 O-O Nc3 Nc6 O-O e5
E60 Panno System d4 Nf6 c4 g6 g3 Bg7 Bg2 d6 Nf3 O-O O-O Nc6 d5 Na5
E60 Pomar Variation, KID d4 Nf6 c4 g6 g3 Bg7 Bg2 O-O Nge2
D70 Kemeri; Neo-Grunfeld d4 Nf6 c4 g6 g3 d5
D71 Counterthrust Variation d4 Nf6 c4 g6 g3 d5 Bg2 Bg7
D71 Exchange Variation, Neo-Grunfeld d4 Nf6 c4 g6 g3 d5 Bg2 Bg7 cxd5 Nxd5
D72 D72 d4 Nf6 c4 g6 g3 d5 Bg2 Bg7 cxd5 Nxd5 e4 Nb6
D73 D73 d4 Nf6 c4 g6 g3 d5 Bg2 Bg7 Nf3
D74 Delayed Exchange Variation, Neo-Grunfeld; D74 d4 Nf6 c4 g6 g3 d5 Bg2 Bg7 Nf3 O-O cxd5 Nxd5 O-O
D75 D75 d4 Nf6 c4 g6 g3 d5 Bg2 Bg7 Nf3 O-O cxd5 Nxd5 O-O c5
D76 D76 d4 Nf6 c4 g6 g3 d5 Bg2 Bg7 Nf3 O-O cxd5 Nxd5 O-O Nb6
D77 Classical Variation, Neo-Grunfeld; D77 d4 Nf6 c4 g6 g3 d5 Bg2 Bg7 Nf3 O-O O-O
D78 Original Defesne, Neo-Grunfeld; D78 d4 Nf6 c4 g6 g3 d5 Bg2 Bg7 Nf3 O-O O-O c6
D79 D79 d4 Nf6 c4 g6 g3 d5 Bg2 Bg7 Nf3 O-O O-O c6 cxd5
D79 Ultra-delayed Exchange Variation, Neo-Grunfeld d4 Nf6 c4 g6 g3 d5 Bg2 Bg7 Nf3 O-O O-O c6 cxd5 cxd5
D78 Modern Defense, Neo-Grunfeld d4 Nf6 c4 g6 g3 d5 Bg2 Bg7 Nf3 O-O O-O dxc4
D78 Polgar Variation, Neo-Grunfeld d4 Nf6 c4 g6 g3 d5 Bg2 Bg7 Nf3 O-O O-O Nc6
E61 E61 d4 Nf6 c4 g6 Nc3
E61 Smyslov Variation, KID d4 Nf6 c4 g6 Nc3 Bg7 Bg5
E70 Normal Variation, KID; E70 d4 Nf6 c4 g6 Nc3 Bg7 e4
E77 Six Pawns Attack, KID d4 Nf6 c4 g6 Nc3 Bg7 e4 d6
E73 E73 d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 Be2
E73 Semi-Averbakh System, KID d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 Be2 O-O Be3
E73 Averbakh Variation, KID d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 Be2 O-O Bg5
E73 Spanish Defense, KID d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 Be2 O-O Bg5 a6
E74 Benoni Defense, KID; E74 d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 Be2 O-O Bg5 c5
E75 E75 d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 Be2 O-O Bg5 c5 d5 c6
E73 Flexible Defense, KID d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 Be2 O-O Bg5 h6
E73 Burgess Line, KID d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 Be2 O-O Bg5 Na6 Qd2 c6
E73 Geller Defense, KID d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 Be2 O-O Bg5 Nbd7
E70 Accelerated Averbakh Variation, KID d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 Bg5
E80 Saemisch Variation, KID; E80 d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 f3
E80 Bronstein Variation, KID d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 f3 e5 d5 Nh5 Be3 Na6 Qd2 Qh4+ g3 Nxg3 Qf2 Nxf1 Qxh4 Nxe3 1Kf2 Nxc4
E81 Normal Defesne, Sameisch Variation, KID; E81 d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 f3 O-O
E82 Double Fianchetto, KID; E82 d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 f3 O-O Be3 b6
E81 Byrne Defense, KID d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 f3 O-O Be3 c6 Bd3 a6
E85 Orthodox Variation, KID; E85 d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 f3 O-O Be3 e5
E87 Closed Variation, KID; E87 d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 f3 O-O Be3 e5 d5
E88 E88 d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 f3 O-O Be3 e5 d5 c6
E89 E89 d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 f3 O-O Be3 e5 d5 c6 Nge2
E87 Bronstein Defense, KID d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 f3 O-O Be3 e5 d5 Nh5 Qd2 Qh4+ g3 Nxg3 Qf2 Nxf1
E86 E86 d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 f3 O-O Be3 e5 Nge2 c6
E83 Yates Defense, KID; E83 d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 f3 O-O Be3 Nc6
E83 Panno Formation, KID d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 f3 O-O Be3 Nc6 Nge2 a6
E84 E84 d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 f3 O-O Be3 Nc6 Nge2 a6 Qd2 Rb8
E83 Ruban Variation, KID d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 f3 O-O Be3 Nc6 Nge2 Rb8
E81 Steiner Attack, KID d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 f3 O-O Bg5
E81 Bobotsov-Korchnoi-Petrosian Variation, KID d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 f3 O-O Nge2
E76 Four Pawns Attack, KID; E76 d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 f4
E76 Six Pawns Attack, KID d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 f4 c5 d5 O-O Be2 e6 dxe6 fxe6 g4 Nc6 h4
E76 Modern Defense, KID d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 f4 Na6
E77 E77 d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 f4 O-O Be2
E77 Florentine Gambit, KID d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 f4 O-O Be2 c5 d5 e6 Nf3 exd5 e5
E78 Fluid Attack, KID; E78 d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 f4 O-O Be2 c5 Nf3
E79 Exchange Variation, Four Pawns Attack, KID; E79 d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 f4 O-O Be2 c5 Nf3 cxd4 Nxd4 Nc6 Be3
E76 Dynamic Attack, KID d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 f4 O-O Nf3 c5 d5
E72 Deferred Fianchetto, KID; E72 d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 g3
E72 Pomar System, KID d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 g3 O-O Bg2 e5 Nge2
E71 Makogonov Variation, KID; E71 d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 h3
E90 E90 d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 Nf3
E91 Orthodox Variation, KID; E91 d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 Nf3 O-O Be2
E92 E92 d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 Nf3 O-O Be2 e5
E92 Gligoric-Taimanov Variation, KID d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 Nf3 O-O Be2 e5 Be3
E92 Petrosian Variation, KID d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 Nf3 O-O Be2 e5 d5
E92 Stein Defense, KID d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 Nf3 O-O Be2 e5 d5 a5
E93 E93 d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 Nf3 O-O Be2 e5 d5 Nbd7
E93 Keres Variation, KID d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 Nf3 O-O Be2 e5 d5 Nbd7 Bg5 h6 Bh4 g5 Bg3 Nh5 h4
E94 E94 d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 Nf3 O-O Be2 e5 O-O
E94 Ukranian Defense, KID d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 Nf3 O-O Be2 e5 O-O a5
E94 Donner Variation, KID d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 Nf3 O-O Be2 e5 O-O c6
E94 Glek Defense, KID d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 Nf3 O-O Be2 e5 O-O Na6
E95 E95 d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 Nf3 O-O Be2 e5 O-O Nbd7 Re1
E96 E96 d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 Nf3 O-O Be2 e5 O-O Nbd7 Re1 c6 Bf1 a5
E97 Aronin-Taimanov Variation, KID; E97 d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 Nf3 O-O Be2 e5 O-O Nc6
E97 Normal Variation, KID d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 Nf3 O-O Be2 e5 O-O Nc6 d5 Ne7
E97 Bayonet Attack, KID d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 Nf3 O-O Be2 e5 O-O Nc6 d5 Ne7 b4
E97 Yepishin’s Line, KID d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 Nf3 O-O Be2 e5 O-O Nc6 d5 Ne7 b4 Nh5 Qc2
E97 Sokolov’s Line, KID d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 Nf3 O-O Be2 e5 O-O Nc6 d5 Ne7 b4 Nh5 Re1
E97 Korchnoi Attack, KID d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 Nf3 O-O Be2 e5 O-O Nc6 d5 Ne7 Bd2
E98 E98 d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 Nf3 O-O Be2 e5 O-O Nc6 d5 Ne7 Ne1
E98 Kozul Gambit, KID d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 Nf3 O-O Be2 e5 O-O Nc6 d5 Ne7 Ne1 Nd7 Be3 f5
E99 Benko Attack, KID; E99 d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 Nf3 O-O Be2 e5 O-O Nc6 d5 Ne7 Ne1 Nd7 f3
E99 Benko Variation, KID d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 Nf3 O-O Be2 e5 O-O Nc6 d5 Ne7 Ne1 Nd7 f3 f5 g4
E90 Larsen Variation, KID d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 Nf3 O-O Be3
E90 Zinnowitz Variation, KID d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 Nf3 O-O Bg5
E91 Kazakh Variation, KID d4 Nf6 c4 g6 Nc3 Bg7 e4 d6 Nf3 O-O Na6
E61 Smyslov Variation, KID d4 Nf6 c4 g6 Nc3 Bg7 Nf3 d6 Bg5
E62 Delayed Fianchetto, KID; E62 d4 Nf6 c4 g6 Nc3 Bg7 Nf3 d6 g3
E64 Yugoslav Variation, KID; E64 d4 Nf6 c4 g6 Nc3 Bg7 Nf3 d6 g3 O-O Bg2 c5
E65 E65 d4 Nf6 c4 g6 Nc3 Bg7 Nf3 d6 g3 O-O Bg2 c5 O-O
E66 E66 d4 Nf6 c4 g6 Nc3 Bg7 Nf3 d6 g3 O-O Bg2 c5 O-O Nc6 d5
E62 Larsen Defense, KID d4 Nf6 c4 g6 Nc3 Bg7 Nf3 d6 g3 O-O Bg2 c6 O-O Bf5
E62 Kavalek Defense, KID d4 Nf6 c4 g6 Nc3 Bg7 Nf3 d6 g3 O-O Bg2 c6 O-O Qa5
E62 Benjamin Defense, KID d4 Nf6 c4 g6 Nc3 Bg7 Nf3 d6 g3 O-O Bg2 c6 O-O Qb6
E67 Debrecen Defense, KID; E67 d4 Nf6 c4 g6 Nc3 Bg7 Nf3 d6 g3 O-O Bg2 Nbd7
E68 E68 d4 Nf6 c4 g6 Nc3 Bg7 Nf3 d6 g3 O-O Bg2 Nbd7 O-O e5 e4
E69 E69 d4 Nf6 c4 g6 Nc3 Bg7 Nf3 d6 g3 O-O Bg2 Nbd7 O-O e5 e4 c6 h3
E62 Carlsbad Variation, KID d4 Nf6 c4 g6 Nc3 Bg7 Nf3 d6 g3 O-O Bg2 Nc6
E63 Panno Variation, KID; E63 d4 Nf6 c4 g6 Nc3 Bg7 Nf3 d6 g3 O-O Bg2 Nc6 O-O a6
E62 Lesser Simagin (Spassky) Variation, KID d4 Nf6 c4 g6 Nc3 Bg7 Nf3 d6 g3 O-O Bg2 Nc6 O-O Bf5
E62 Simagin Variation, KID d4 Nf6 c4 g6 Nc3 Bg7 Nf3 d6 g3 O-O Bg2 Nc6 O-O Bg4
E62 Uhlmann-Szabo System, KID d4 Nf6 c4 g6 Nc3 Bg7 Nf3 d6 g3 O-O Bg2 Nc6 O-O e5
E70 Kramer Variation, KID d4 Nf6 c4 g6 Nc3 Bg7 Nf3 d6 Nge2
D80 Grunfeld Defense; D80 d4 Nf6 c4 g6 Nc3 d5
D82 Brinckmann Attack, Grunfeld; D82 d4 Nf6 c4 g6 Nc3 d5 Bf4
D83 Grunfeld Gambit; D83 d4 Nf6 c4 g6 Nc3 d5 Bf4 Bg7 e3 O-O
D84 D84 d4 Nf6 c4 g6 Nc3 d5 Bf4 Bg7 e3 O-O cxd5 Nxd5
D83 Capablanca Variation, Grunfeld d4 Nf6 c4 g6 Nc3 d5 Bf4 Bg7 e3 O-O Rc1
D83 Botvinnik Variation, Grunfeld d4 Nf6 c4 g6 Nc3 d5 Bf4 Bg7 e3 O-O Rc1 c5 dxc5 Be6
D83 Reshevsky Gambit, Grunfeld d4 Nf6 c4 g6 Nc3 d5 Bf4 Bg7 e3 O-O Rc1 c5 dxc5 Qa5
D80 Stockholm Variation, Grunfeld d4 Nf6 c4 g6 Nc3 d5 Bg5
D80 Lundin Variation, Grunfeld d4 Nf6 c4 g6 Nc3 d5 Bg5 Ne4 Nxe4 dxc3 Qd2 c5
D85 Exchange Variation, Grunfeld; D85 d4 Nf6 c4 g6 Nc3 d5 cxd5 Nxd5
D85 Exchange Variation, Grunfeld; d4 Nf6 c4 g6 Nc3 d5 cxd5 Nxd5 e4 Nxc3 bxc3
D86 Classical Main Line, Grunfeld; D86 d4 Nf6 c4 g6 Nc3 d5 cxd5 Nxd5 e4 Nxc3 bxc3 Bg7 Bc4
D86 Simagin Variation, Grunfeld d4 Nf6 c4 g6 Nc3 d5 cxd5 Nxd5 e4 Nxc3 bxc3 Bg7 Bc4 O-O Ne2 b6 h4 Ba6
D87 Spassky Variation, Grunfeld; D87 d4 Nf6 c4 g6 Nc3 d5 cxd5 Nxd5 e4 Nxc3 bxc3 Bg7 Bc4 O-O Ne2 c5
D87 Seville Variation, Grunfeld d4 Nf6 c4 g6 Nc3 d5 cxd5 Nxd5 e4 Nxc3 bxc3 Bg7 Bc4 O-O Ne2 c5 O-O Nc6 Be3
D88 D88 d4 Nf6 c4 g6 Nc3 d5 cxd5 Nxd5 e4 Nxc3 bxc3 Bg7 Bc4 O-O Ne2 c5 O-O Nc6 Be3 cxd4
D89 D89 d4 Nf6 c4 g6 Nc3 d5 cxd5 Nxd5 e4 Nxc3 bxc3 Bg7 Bc4 O-O Ne2 c5 O-O Nc6 Be3 cxd4 cxd4 Bg4 1f3 Na5 1Bd3
D89 Sokolsky Variation, Grunfeld d4 Nf6 c4 g6 Nc3 d5 cxd5 Nxd5 e4 Nxc3 bxc3 Bg7 Bc4 O-O Ne2 c5 O-O Nc6 Be3 cxd4 cxd4 Bg4 1f3 Na5 1Bd3 Be6 1d5
D86 Simagin Improved Variation, Grunfeld d4 Nf6 c4 g6 Nc3 d5 cxd5 Nxd5 e4 Nxc3 bxc3 Bg7 Bc4 O-O Ne2 Nc6
D86 Larsen Variation, Grunfeld d4 Nf6 c4 g6 Nc3 d5 cxd5 Nxd5 e4 Nxc3 bxc3 Bg7 Bc4 O-O Ne2 Qd7
D86 Larsen Variation, Grunfeld d4 Nf6 c4 g6 Nc3 d5 cxd5 Nxd5 e4 Nxc3 bxc3 Bg7 Bc4 O-O Ne2 Qd7 O-O b6
D85 Modern Main Line, Grunfeld d4 Nf6 c4 g6 Nc3 d5 cxd5 Nxd5 e4 Nxc3 bxc3 Bg7 Nf3
D85 Kramnik’s Line, Grunfeld d4 Nf6 c4 g6 Nc3 d5 cxd5 Nxd5 e4 Nxc3 bxc3 Bg7 Nf3 c5 h3
D85 Kemeri Variation, Grunfeld d4 Nf6 c4 g6 Nc3 d5 cxd5 Nxd5 g3
D85 Nadanian Attack d4 Nf6 c4 g6 Nc3 d5 cxd5 Nxd5 Na4
D80 Makogonov Variation, Grunfeld d4 Nf6 c4 g6 Nc3 d5 e3 Bg7 Nf3 O-O b4
D80 Opocensky Variation, Grunfeld d4 Nf6 c4 g6 Nc3 d5 e3 Bg7 Nf3 O-O Bd2
D80 Paris Variation, Grunfeld d4 Nf6 c4 g6 Nc3 d5 e3 Bg7 Nf3 O-O Bd3
D80 Schlechter Variation, Grunfeld d4 Nf6 c4 g6 Nc3 d5 e3 Bg7 Nf3 O-O Bd3 c6
D80 Flohr Variation, Grunfeld d4 Nf6 c4 g6 Nc3 d5 e3 Bg7 Nf3 O-O Bd3 c6 O-O Bf5
D80 Smyslov Variation, Grunfeld d4 Nf6 c4 g6 Nc3 d5 e3 Bg7 Nf3 O-O Bd3 c6 O-O Bg4
D80 Vienna Variation, Grunfeld d4 Nf6 c4 g6 Nc3 d5 e3 Bg7 Nf3 O-O Qb3
D80 Pachman Variation, Grunfeld d4 Nf6 c4 g6 Nc3 d5 e3 Bg7 Nf3 O-O Qb3 dxc4 Bxc4 Nbd7 Ng5
D80 Botvinnik Variation, Grunfeld d4 Nf6 c4 g6 Nc3 d5 e3 Bg7 Nf3 O-O Qb3 e6
D80 Schlechter Variation, Grunfeld d4 Nf6 c4 g6 Nc3 d5 e3 c6
D70 Lutikov Variation, Grunfeld d4 Nf6 c4 g6 Nc3 d5 f3
D70 Murey Attack, Grunfeld d4 Nf6 c4 g6 Nc3 d5 f3 c5 cxd5 Nxd5 Na4
D80 Kemeri Variation, Grunfeld d4 Nf6 c4 g6 Nc3 d5 g3
D80 Gibbon Gambit; Grunfeld Spike d4 Nf6 c4 g6 Nc3 d5 g4
D80 Zaitsev Gambit, Grunfeld d4 Nf6 c4 g6 Nc3 d5 h4
D90 Three Knights Variation, Grunfeld; D90 d4 Nf6 c4 g6 Nc3 d5 Nf3
D92 Hungarian Attack, Grunfeld; D92 d4 Nf6 c4 g6 Nc3 d5 Nf3 Bg7 Bf4
D93 D93 d4 Nf6 c4 g6 Nc3 d5 Nf3 Bg7 Bf4 O-O e3
D91 Petrosian System, Grunfeld; D91 d4 Nf6 c4 g6 Nc3 d5 Nf3 Bg7 Bg5
D94 Burille Variation, Grunfeld; D94 d4 Nf6 c4 g6 Nc3 d5 Nf3 Bg7 e3
D94 Makogonov Variation, Grunfeld d4 Nf6 c4 g6 Nc3 d5 Nf3 Bg7 e3 O-O b4
D94 Opocensky Variation, Grunfeld d4 Nf6 c4 g6 Nc3 d5 Nf3 Bg7 e3 O-O Bd2
D95 D95 d4 Nf6 c4 g6 Nc3 d5 Nf3 Bg7 e3 O-O Qb3
D90 Flohr Variation, Grunfeld d4 Nf6 c4 g6 Nc3 d5 Nf3 Bg7 Qa4+
D96 Russian Variation, Grunfeld; D96 d4 Nf6 c4 g6 Nc3 d5 Nf3 Bg7 Qb3
D97 D97 d4 Nf6 c4 g6 Nc3 d5 Nf3 Bg7 Qb3 dxc4 Qxc4 O-O e4
D97 Hungarian Variation, Grunfeld d4 Nf6 c4 g6 Nc3 d5 Nf3 Bg7 Qb3 dxc4 Qxc4 O-O e4 a6
D97 Levenfish Variation, Grunfeld d4 Nf6 c4 g6 Nc3 d5 Nf3 Bg7 Qb3 dxc4 Qxc4 O-O e4 b6
D98 Smyslov Variation, Grunfeld; D98 d4 Nf6 c4 g6 Nc3 d5 Nf3 Bg7 Qb3 dxc4 Qxc4 O-O e4 Bg4
D98 Keres Variation, Grunfeld d4 Nf6 c4 g6 Nc3 d5 Nf3 Bg7 Qb3 dxc4 Qxc4 O-O e4 Bg4 Be2 Nfd7 Be2 Nb6 Qd3 Nc6 O-O-O Qc8
D99 D99 d4 Nf6 c4 g6 Nc3 d5 Nf3 Bg7 Qb3 dxc4 Qxc4 O-O e4 Bg4 Be3 Nfd7 Qb3
D99 Yugoslav Variation, Grunfeld d4 Nf6 c4 g6 Nc3 d5 Nf3 Bg7 Qb3 dxc4 Qxc4 O-O e4 Bg4 Be3 Nfd7 Qb3 c5
D97 Szabo (Boleslavsky) Variation, Grunfeld d4 Nf6 c4 g6 Nc3 d5 Nf3 Bg7 Qb3 dxc4 Qxc4 O-O e4 c6
D97 Prins Variation, Grunfeld d4 Nf6 c4 g6 Nc3 d5 Nf3 Bg7 Qb3 dxc4 Qxc4 O-O e4 Na6
D97 Simagin (Byrne) Variation, Grunfeld d4 Nf6 c4 g6 Nc3 d5 Nf3 Bg7 Qb3 dxc4 Qxc4 O-O e4 Nc6
D90 Slav Fianchetto d4 Nf6 c4 g6 Nc3 d5 Nf3 Nf6 Nc3 g6
D81 Accelerated Russian Variation, Grunfeld; D81 d4 Nf6 c4 g6 Nc3 d5 Qb3
E60 King’s Knight Variation, KID d4 Nf6 c4 g6 Nf3
E60 Santassiere Variation, KID d4 Nf6 c4 g6 Nf3 Bg7 b4
D70 Neo-Grunfeld Defense d4 Nf6 c4 g6 Nf3 d5
A50 Van Geet; Kevitz; Trajkovic; Mexican d4 Nf6 c4 Nc6
D70 Iago Defense d4 Nf6 c4 Nc6
A50 Horsefly Gambit d4 Nf6 c4 Nc6 d5 Ne5 f4
D71 D71 d4 Nf6 c4 Nc6 g3 d5
A45 Pawn Push Variation d4 Nf6 d5
A45 Omega Gambit d4 Nf6 e4
A45 Arafat Gambit d4 Nf6 e4 Nxe4 Bd3 Nf6 Bg5
A45 Paleface Attack d4 Nf6 f3
A45 Webster Gambit d4 Nf6 f3 c5 d5 e6 e4 exd5 e5
A45 Blackmar-Diemer Gambit Deferred d4 Nf6 f3 d5 e4
A45 Kraus-Muhlherr Counter Gambit d4 Nf6 f3 d5 e4 e5 dxe5 Nxe4
A45 Gedult Attack d4 Nf6 f3 d5 g4
A45 Gedult-Gunderam System d4 Nf6 f3 d5 g4
A45 Linder Counter Gambit d4 Nf6 f3 e6 e4 Nxe4
A45 Canard Attack d4 Nf6 f4
A45 Ueberlinger Gambit d4 Nf6 g3 e5
A45 Bullfrog; Weidenhagen; Krabbe; Ochsenfrosch d4 Nf6 g4
A45 Bronstein Gambit d4 Nf6 g4
A45 Oshima Defense d4 Nf6 g4 e5
A45 Gibbins-Wiedehagen Gambit Accepted d4 Nf6 g4 Nxg4
A45 Stummer Gambit d4 Nf6 g4 Nxg4 e4 d6 Be2 Nf6 Nc3
A45 Maltese Falcon d4 Nf6 g4 Nxg4 f3 Nf6 e4
A45 Reversed Chigorin Defense d4 Nf6 Nc3 c5
A45 Von Beivorseen d4 Nf6 Nc3 c5 dxc5
A45 Malich Gambit d4 Nf6 Nc3 d5 Bg5 c5 Bxf6 gxf6 e4 dxe4 d5
A45 Huebsch Gambit d4 Nf6 Nc3 d5 e4 Nxe4
A45 Maddigan Gambit d4 Nf6 Nc3 e5
A45 Lazard Gambit; Maddigan Gambit d4 Nf6 Nd2 e5
A46 Knights Variation, Indian Game; A46 d4 Nf6 Nf3
A46 Polish Defense d4 Nf6 Nf3 b5
A47 Capablanca Variation, Indian Game; A47 d4 Nf6 Nf3 b6
A47 Torre Attack d4 Nf6 Nf3 b6 Bg5
A47 Schnepper Gambit d4 Nf6 Nf3 b6 c3 e5
A47 Marienbad Variation d4 Nf6 Nf3 b6 g3 Bb7 Bg2 c5
A47 Berg Variation d4 Nf6 Nf3 b6 g3 Bb7 Bg2 c5 c4 cxd4 Qxd4
A46 Spielmann-Indian d4 Nf6 Nf3 c5
A46 Pseudo-Benko Gambit d4 Nf6 Nf3 c5 d5 b5
A46 Czech-Indian d4 Nf6 Nf3 c6
A46 London System d4 Nf6 Nf3 e6 Bf4
A46 Torre Attack d4 Nf6 Nf3 e6 Bg5
A46 Petrosian Gambit d4 Nf6 Nf3 e6 Bg5 c5 e3 b6 d5
A46 Swiss; Wagner Gambit d4 Nf6 Nf3 e6 Bg5 c5 e4
A46 Nimzovich Variation, Torre Attack d4 Nf6 Nf3 e6 Bg5 h6
A46 Yusupov-Rubinstein System d4 Nf6 Nf3 e6 e3
A48 Pseudo-King’s Indian Variation; A48 d4 Nf6 Nf3 g6
A48 London System, Torre Attack d4 Nf6 Nf3 g6 Bf4
A48 London Variation d4 Nf6 Nf3 g6 Bf4 Bg7 Nbd2
A48 Fianchetto Defense, Torre Attack d4 Nf6 Nf3 g6 Bg5
A48 Euwe Variation, Torre Attack d4 Nf6 Nf3 g6 Bg5 Bg7 Nbd2 c5
A48 King’s Indian Variation d4 Nf6 Nf3 g6 e3 Bg7 Bd3 d6
A49 Przepiorka Variation; A49 d4 Nf6 Nf3 g6 g3
D02 Barry Attack d4 Nf6 Nf3 g6 Nc3 d5 Bf4 Bg7 e3 O-O Be2
A46 Dory Defense d4 Nf6 Nf3 Ne4
B00 Ware Defense e4 a5
B00 Corn Stalks e4 a5
B00 Snagkeouss Defense e4 a5 d4 Nc6
B00 St George; Birmingham; Baker e4 a6
B00 San Jorge Variation e4 a6 d4 b5 Nf3 Bb7 Bd3 d6 O-O g6 c3 Bg7
B00 Polish Variation, St George Defense e4 a6 d4 b5 Nf3 Bb7 Bd3 e6
B00 Zilbermints Gambit, St George Defense e4 a6 d4 e5
B00 San Jorge Variation e4 a6 d4 e6
B00 Three Pawn Attack, St George e4 a6 d4 e6 c4
B00 Sanky-Georg Gambit, St George e4 a6 d4 e6 c4 b5
B00 Woodchuck Variation, St George e4 a6 d4 Nc6
B00 Owen’s Defense; Greek Defense e4 b6
B00 Guatemalan Defense e4 b6 d4 Ba6
B00 Matovinsky Gambit e4 b6 d4 Bb7 Bd3 f5
B00 Matovinsky Gambit e4 b6 d4 Bb7 Bd3 f5 exf5 Bxg2 Qh5+ g6
B00 Naselwaus Variation, Owen’s Defense e4 b6 d4 Bb7 Bg5
B00 Wind Gambit, Owen Defense e4 b6 d4 Bb7 f3 e5
B00 Smith Gambit, Owen Defense e4 b6 d4 Bb7 Nf3
B00 Hekili-Loa Gambit, Owen Defense e4 b6 d4 c5 dxc5 Nc6
B20 Sicilian Defense; B20 e4 c5
B20 Mengarini Gambit, Sicilian e4 c5 a3
B20 Mengarini Gambit, Sicilian e4 c5 a3 Nc6 b4
B20 Snyder Variation, Sicilian e4 c5 b3
B20 Queen Fianchetto Variation, Sicilian e4 c5 b3 b6
B20 Wing Gambit, Sicilian e4 c5 b4
B20 Marshall Variation, Sicilian e4 c5 b4 cxb4 a3
B20 Wing; Carlsbad Variation, Sicilian e4 c5 b4 cxb4 a3 bxa3
B20 Marienbad Variation, Sicilian e4 c5 b4 cxb4 a3 d5 exd5 Qxd5 Bb2
B20 Abrahams Variation, Sicilian Wing Gambit e4 c5 b4 cxb4 Bb2
B20 Santasiere Wing Gambit, Sicilian e4 c5 b4 cxb4 c4
B20 Bowlder Attack, Sicilian e4 c5 Bc4
B20 Slow Sicilian e4 c5 Be2
B22 Alapin; Sveshnikov Var, Sicilian; B22 e4 c5 c3
B22 Barmen Defense, Sicilian e4 c5 c3 d5 exd5 Qxd5
B22 Sherzer Variation, Sicilian e4 c5 c3 Nf6 e5 Nd5 d4 e6 Nf3 Nc6
B22 Stoltz Attack, Sicilian e4 c5 c3 Nf6 e5 Nd5 Nf3 Nc6 Bc4 Nb6 Bb3
B20 Staunton-Cochrane Variation, Sicilian e4 c5 c4
B20 Gloria Variation, Sicilian e4 c5 c4 d6 Nc3 Nc6 g3 h5
B20 Chameleon Variation, Sicilian e4 c5 d3
B20 Big Clamp Variation, Sicilian e4 c5 d3 Nc6 c3 d6 f4
B20 Sicilian Center Game e4 c5 d4 cxd4
B20 Smith-Morra; Fleissig Gambit, Sic e4 c5 d4 cxd4 c3
B20 Rivadavia Gambit, Sicilian e4 c5 d4 cxd4 c3
B20 Push Variation, Smith-Morra Gambit, Sicilian e4 c5 d4 cxd4 c3 d3
B20 Dubois Variation, Sicilian e4 c5 d4 cxd4 c3 d3 c4
B20 Scandanavian Formation, Smith-Morra, Sicilian e4 c5 d4 cxd4 c3 d5
B20 Smith-Morra Accepted, Sicilian e4 c5 d4 cxd4 c3 dxc3
B20 Chicago Defense, Smith-Morra Accepted, Sicilian e4 c5 d4 cxd4 c3 dxc3 Nxc3 d6 Bc4 e6 Nf3 Nf6 O-O a6
B20 Taimanov Formation, Smith-Morra Accepted, Sicilian e4 c5 d4 cxd4 c3 dxc3 Nxc3 e6 Bc4 a6 Nf3 Ne7
B20 Kan Formation, Smith-Morra Accepted, Sicilian e4 c5 d4 cxd4 c3 dxc3 Nxc3 e6 Nf3 a6
B20 Fianchetto Defense, Smith-Morra Accepted, Sicilian e4 c5 d4 cxd4 c3 dxc3 Nxc3 e6 Nf3 g6
B20 Classical Formation, Smith-Morra Accepted, Sicilian e4 c5 d4 cxd4 c3 dxc3 Nxc3 Nc6 Nf3 d6 Bc4 a6 O-O Nf6
B20 Scheveningen Formation, Smith-Morra Accepted e4 c5 d4 cxd4 c3 dxc3 Nxc3 Nc6 Nf3 d6 Bc4 e6
B20 Paulsen Formation, Smith-Morra Accepted, Sicilian e4 c5 d4 cxd4 c3 dxc3 Nxc3 Nc6 Nf3 e6 Bc4 a6
B20 Morphy Defense Deferred, Smith-Morra Accepted e4 c5 d4 cxd4 c3 dxc3 Nxc3 Nc6 Nf3 e6 Bc4 a6 O-O b5 Bb3 Bc5
B20 Larsen Defense, Smith-Morra Accepted, Sicilian e4 c5 d4 cxd4 c3 dxc3 Nxc3 Nc6 Nf3 e6 Bc4 a6 O-O Qc7 Qe2 Bd6
B20 Pin Defense, Smith-Morra Accepted, Sicilian e4 c5 d4 cxd4 c3 dxc3 Nxc3 Nc6 Nf3 e6 Bc4 Bb4
B20 Morphy Defense, Smith-Morra Accepted, Sicilian e4 c5 d4 cxd4 c3 dxc3 Nxc3 Nc6 Nf3 e6 Bc4 Bc5
B20 Sozin Formation, Smith-Morra Accepted, Sicilian e4 c5 d4 cxd4 c3 dxc3 Nxc3 Nc6 Nf3 e6 Bc4 d6 O-O a6 Qe2 b5
B20 Center Formation, Smith-Morra Declined, Sicilian e4 c5 d4 cxd4 c3 e5
B20 Alapin Formation, Smith-Morra Declined, Sicilian e4 c5 d4 cxd4 c3 Nf6
B20 Wing Formation, Smith-Morra Declined, Sicilian e4 c5 d4 cxd4 c3 Qa5
B20 Halasz Gambit, Sicilian e4 c5 d4 cxd4 f4
B20 Morphy Gambit, Sicilian e4 c5 d4 cxd4 Nf3
B20 Andreaschek Gambit, Sicilian e4 c5 d4 cxd4 Nf3 e5 c3
B21 Larsen-Santasiere (McDonnell Attack) Variation, Sicilian; B21 e4 c5 f4
B21 Tal Gambit, Sicilian e4 c5 f4 d5 exd5 Nf6
B20 Steinitz; Tartakower, Lasker-Dunne Variation, Sicilian e4 c5 g3
B20 Myers Attack, Sicilian e4 c5 h4
B20 King David’s Opening e4 c5 Ke2
B23 Closed; Chigorin Variation, Sicilian; B23 e4 c5 Nc3
B23 Grand Prix Variation, Sicilian e4 c5 Nc3 d6 f4
B23 Marshall Gambit, Sicilian e4 c5 Nc3 e6 d4 d5
B23 Korchnoi Defense, Sicilian e4 c5 Nc3 e6 g3 d5
B23 Traditional Closed Sicilian e4 c5 Nc3 Nc6
B23 Portland Attack, Sicilian e4 c5 Nc3 Nc6 d3 g6 g4
B23 Vinken System, Sicilian; Grand Prix Attack e4 c5 Nc3 Nc6 f4
B23 Schofman Variation, Sicilian e4 c5 Nc3 Nc6 f4 g6 Nf3 Bg7 Bc4 e6 f5
B24 Fianchetto Variation, Sicilian Closed; B24 e4 c5 Nc3 Nc6 g3
B25 B25 e4 c5 Nc3 Nc6 g3 g6 Bg2 Bg7 d3 d6
B26 B26 e4 c5 Nc3 Nc6 g3 g6 Bg2 Bg7 d3 d6 Be3
B25 Botvinnik Defense, Sicilian Closed e4 c5 Nc3 Nc6 g3 g6 Bg2 Bg7 d3 d6 f4 e5
B25 Edge Variation, Sicilian Closed e4 c5 Nc3 Nc6 g3 g6 Bg2 Bg7 d3 d6 f4 e5 Nh3 Nge7
B23 Chameleon Sicilian e4 c5 Nc3 Nc6 Nge2
B20 Keres; Billium Attack, Sicilian; Chameleon e4 c5 Ne2
B27 B27 e4 c5 Nf3
B28 O’Kelly Variation, Sicilian; B28 e4 c5 Nf3 a6
B28 Kieseritzky System, Sicilian e4 c5 Nf3 a6 b3
B28 Wing Gambit, Sicilian e4 c5 Nf3 a6 b4
B28 Aronin System, Sicilian e4 c5 Nf3 a6 Be2
B28 Venice System, Sicilian e4 c5 Nf3 a6 c3
B28 Ljubojevic Line, Sicilian e4 c5 Nf3 a6 c3 b5
B28 Gambit Line, O’Kelly Sicilian e4 c5 Nf3 a6 c3 d5 exd5 Nf6
B28 Steiner Line, Sicilian e4 c5 Nf3 a6 c3 d6
B28 Barcza Line, Sicilian e4 c5 Nf3 a6 c3 Nf6
B28 Maroczy Bind, O’Kelly Sicilian e4 c5 Nf3 a6 c4
B28 Robatsch Line, Sicilian e4 c5 Nf3 a6 c4 d6
B28 Paulsen Line, Sicilian e4 c5 Nf3 a6 c4 e6
B28 Geller Line, Sicilian e4 c5 Nf3 a6 c4 Nc6 d4 cxd4 Nxd4 e5
B28 Quiet System, O’Kelly Sicilian e4 c5 Nf3 a6 d3
B28 Normal System, O’Kelly Sicilian e4 c5 Nf3 a6 d4
B28 Cortlever Gambit, Sicilian e4 c5 Nf3 a6 d4 cxd4 Bc4
B28 Smith-Morra Line, O’Kelly Sicilian e4 c5 Nf3 a6 d4 cxd4 c3
B28 Taimanov Line, O’Kelly Sicilian e4 c5 Nf3 a6 d4 cxd4 Nxd4 e5
B28 Kan Line, O’Kelly Sicilian e4 c5 Nf3 a6 d4 cxd4 Nxd4 e6
B28 Zagorovsky Line, O’Kelly Sicilian e4 c5 Nf3 a6 d4 cxd4 Qxd4
B28 Reti System, O’Kelly Sicilian e4 c5 Nf3 a6 g3
B28 Yerevan System, O’Kelly Sicilian e4 c5 Nf3 a6 Nc3
B27 Polish Gambit, Sicilian e4 c5 Nf3 b5
B27 Katalimov Variation, Sicilian e4 c5 Nf3 b6
B50 Modern Variation, Sicilian; B50 e4 c5 Nf3 d6
B51 Wing Gambit Deferred, Sicilian e4 c5 Nf3 d6 b4
B51 Moscow Variation, Sicilian; Canal Attack; B51 e4 c5 Nf3 d6 Bb5+
B52 Main Line, Canal Attack, Sicilian; B52 e4 c5 Nf3 d6 Bb5+ Bd7
B52 Bronstein (Haag) Gambit, Sicilian e4 c5 Nf3 d6 Bb5+ Bd7 Bxd7+ Qxd7 O-O Nc6 c3 Nf6 d4
B51 Moscow Gambit, Sicilian e4 c5 Nf3 d6 Bb5+ Nc6 O-O Bd7 c3 a6 Bxc6 Bxc6 Re1 Nf6 d4 Bxe4 Bg5
B51 Dorfman Gambit, Sicilian e4 c5 Nf3 d6 Bb5+ Nc6 O-O Bd7 Qe2 g6 e5
B50 Kopec System, Sicilian e4 c5 Nf3 d6 Bd3
B50 Delayed Alapin, Sicilian e4 c5 Nf3 d6 c3
B50 Basman-Palatnik Gambit e4 c5 Nf3 d6 c3 Nf6 Be2 Nc6 d4 cxd4 cxd4 Nxe4
B53 B53 e4 c5 Nf3 d6 d4
B53 Tartakower Variation, Sicilian e4 c5 Nf3 d6 d4 cxd4 c3
B54 B54 e4 c5 Nf3 d6 d4 cxd4 Nxd4
B55 B55 e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6
B55 Ginsberg Gambit, Sicilian e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Bc4
B55 Moscow (Prins) Variation, Sicilian e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 f3
B55 Venice Attack, Sicilian e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 f3 e5 Bb5+
B56 B56 e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3
B90 Najdorf Variation, Sicilian; B90 e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 a6
B90 Lipnitzky Variation, Sicilian e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 a6 Bc4
B92 Opocensky Variation, Sicilian; B92 e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 a6 Be2
B92 Opocensky Variation, Sicilian e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 a6 Be2 e5
B90 Byrne Variation, Sicilian; English Attack e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 a6 Be3
B90 Anti-English, Najdorf Sicilian e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 a6 Be3 Ng4
B94 B94 e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 a6 Bg5
B95 B95 e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 a6 Bg5 e6
B96 B96 e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 a6 Bg5 e6 f4
B96 Polugaevsky; Accelerated Najdorf e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 a6 Bg5 e6 f4 b5
B96 Simagin Line, Najdorf Sicilian e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 a6 Bg5 e6 f4 b5 e5 dxe5 fxe5 Qc7 Qe2
B98 B98 e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 a6 Bg5 e6 f4 Be7
B98 Argenitne; Goteborg Var, Sicilian e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 a6 Bg5 e6 f4 Be7 Qf3 h6 Bh4 g5
B98 Browne Variation, Najdorf Sicilian e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 a6 Bg5 e6 f4 Be7 Qf3 h6 Bh4 Qc7
B99 B99 e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 a6 Bg5 e6 f4 Be7 Qf3 Qc7 O-O-O Nbd7
B97 Poisoned Pawn Variation, Najdorf Sicilian; B97 e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 a6 Bg5 e6 f4 Qb6
B97 Poisoned Pawn Variation, Sicilian e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 a6 Bg5 e6 f4 Qb6 Qd2
B97 Poisoned Pawn Accepted, Najdorf Sicilian e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 a6 Bg5 e6 f4 Qb6 Qd2 Qxb2
B93 Amsterdam Variation, Sicilian; B93 e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 a6 f4
B91 Zagreb Variation, Sicilian; B91 e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 a6 g3
B90 Adams Attack, Sicilian e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 a6 h3
B90 Freak Attack, Siicilian e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 a6 Rg1
B56 Kupreichik Variation, Sicilian e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 Bd7
B56 Venice Attack, Sicilian e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 e5 Bb5+
B80 Scheveingen Variation, Sicilian; B80 e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 e6
B80 Vitolins Variation, Sicilian e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 e6 Bb5+
B86 Fischer Attack, Sozin Attack, Sicilian; B86 e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 e6 Bc4
B87 Flank Variation, Sicilian; B87 e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 e6 Bc4 a6 Bb3 b5
B88 Leonhardt Variation, Sicilian; B88 e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 e6 Bc4 Nc6
B89 B89 e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 e6 Bc4 Nc6 Be3
B89 Sherbakov Variation, Sicilian e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 e6 Bc4 Nc6 Be3 Be7 Bb3 O-O O-O Na5 f4 b6
B89 Velimirovic Variation, Sicilian e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 e6 Bc4 Nc6 Be3 Be7 Qe2
B83 Scheveningen Variation, Sicilian; B83 e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 e6 Be2
B84 Modern Paulsen, Sicilian; B84 e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 e6 Be2 a6
B85 B85 e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 e6 Be2 a6 O-O Be7
B85 Paulsen Variation, Sicilian e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 e6 Be2 a6 O-O Qc7 f4 Nc6
B80 English Attack, Scheveningen Sicilian e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 e6 Be3 a6 f3
B81 Delayed Keres Attack, Sicilian e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 e6 Be3 a6 g4
B81 Perenyi Gambit, Sicilian e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 e6 Be3 a6 g4 e5 Nf5 g6 g5
B82 Matanovic Attack, Sicilian; B82 e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 e6 f4
B82 Tal Variation, Sicilian e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 e6 f4 Nc6 Be3 Be7 Qf3
B80 Fianchetto Variation, Scheveningen Sicilian e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 e6 g3
B81 Keres; Panov Variation, Sicilian; B81 e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 e6 g4
B70 Dragon Variation, Sicilian; B70 e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 g6
B70 Alekhine Variation, Sicilian e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 g6 Be2 Bg7 O-O O-O Nb3
B72 B72 e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 g6 Be3
B72 Nottingham Variation, Sicilian e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 g6 Be3 Bg7 Be2 Nc6 Nb3
B73 B73 e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 g6 Be3 Bg7 Be2 Nc6 O-O
B73 Zollner Gambit, Sicilian e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 g6 Be3 Bg7 Be2 Nc6 O-O O-O f4 Qb6
B74 B74 e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 g6 Be3 Bg7 Be2 Nc6 O-O O-O Nb3
B74 Alekhine Line, Sicilian Dragon e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 g6 Be3 Bg7 Be2 Nc6 O-O O-O Nb3 a5
B74 Maroczy Line, Sicilian Dragon e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 g6 Be3 Bg7 Be2 Nc6 O-O O-O Nb3 Be6 f4 Na5
B74 Tartakower Line, Sicilian Dragon e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 g6 Be3 Bg7 Be2 Nc6 O-O O-O Nb3 Be6 f4 Qc8
B72 Amsterdam (Battery) Variation, Sicilian e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 g6 Be3 Bg7 Be2 Nc6 Qd2
B72 Grigoriev Variation, Sicilian e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 g6 Be3 Bg7 Be2 Nc6 Qd2 O-O O-O-O
B75 B75 e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 g6 Be3 Bg7 f3
B76 Yugoslav Attack, Sicilian Dragon; B76 e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 g6 Be3 Bg7 f3 O-O
B77 B77 e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 g6 Be3 Bg7 f3 O-O Qd2 Nc6 Bc4
B78 B78 e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 g6 Be3 Bg7 f3 O-O Qd2 Nc6 Bc4 Bd7 O-O-O
B79 B79 e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 g6 Be3 Bg7 f3 O-O Qd2 Nc6 Bc4 Bd7 O-O-O Qa5
B77 Sosonko Variation, Sicilian Dragon e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 g6 Be3 Bg7 f3 O-O Qd2 Nc6 Bc4 Nd7
B77 Czerniak Variation, Sicilian Dragon e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 g6 Be3 Bg7 f3 O-O Qd2 Nc6 Bc4 Nxd4 Bxe4
B76 Panov Variation, Sicilian Dragon e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 g6 Be3 Bg7 f3 O-O Qd2 Nc6 g4
B71 Levenfish Variation, Sicilian; B71 e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 g6 f4
B70 Fianchetto Variation, Sicilian Dragon e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 g6 g3
B56 Classical Variation, Sicilian e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 Nc6
B57 Sozin; Velimirovic Attack, Sicilian; B57 e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 Nc6 Bc4
B57 Anti-Sozin Variation, Sicilian e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 Nc6 Bc4 Qb6
B56 Yates Variation, Sicilian e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 Nc6 Bd3
B58 B58 e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 Nc6 Be2
B58 Boleslavsky Variation, Sicilian e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 Nc6 Be2 e5
B59 B59 e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 Nc6 Be2 e5 Nb3
B58 Louma Variation, Sicilian e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 Nc6 Be2 e5 Nxc6
B60 Richter-Rauzer Variation, Sicilian; B60 e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 Nc6 Bg5
B62 B62 e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 Nc6 Bg5 e6
B62 Margate (Vitolins) Variation, Sicilian e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 Nc6 Bg5 e6 Bb5
B62 Podebrady Variation, Sicilian e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 Nc6 Bg5 e6 Nb3
B62 Exchange Variation, Richter-Rauzer Sicilian e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 Nc6 Bg5 e6 Nxc6
B63 Rauzer Variation, Sicilian; B63 e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 Nc6 Bg5 e6 Qd2
B66 B66 e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 Nc6 Bg5 e6 Qd2 a6
B67 B67 e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 Nc6 Bg5 e6 Qd2 a6 O-O-O Bd7
B68 B68 e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 Nc6 Bg5 e6 Qd2 a6 O-O-O Bd7 f4 Be7
B69 B69 e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 Nc6 Bg5 e6 Qd2 a6 O-O-O Bd7 f4 Be7 Nf3 b5 Bxf6
B64 B64 e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 Nc6 Bg5 e6 Qd2 Be7 O-O-O O-O f4
B65 B65 e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 Nc6 Bg5 e6 Qd2 Be7 O-O-O O-O f4 Nxd4 Qxd4
B63 Ivanov Variation, Sicilian e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 Nc6 Bg5 e6 Qd2 Qb6
B60 Dragon Variation, Richter-Rauzer Sicilian e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 Nc6 Bg5 g6
B58 Fianchetto Variation, Richter-Rauzer Sicilizn e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 Nc6 g3
B56 Spielmann Variation, Sicilian e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 Nc6 Nde2
B61 B61 e4 c5 Nf3 d6 d4 cxd4 Nxd4 Nf6 Nc3 Nc6 Qd2
B53 Chekhover Variation, Sicilian e4 c5 Nf3 d6 d4 cxd4 Qxd4
B53 Zaitsev Variation, Sicilian e4 c5 Nf3 d6 d4 cxd4 Qxd4 Nc6 Bb5 Qd7
B53 Lazy Knight Variation, Sicilian e4 c5 Nf3 d6 d4 Nd7
B53 Cortlever Variation, Sicilian e4 c5 Nf3 d6 d4 Nf6 dxc5 Nxe4 cxd6
B50 Kotov Gambit, Sicilian e4 c5 Nf3 d6 g3 b5
B27 Jalalabad Variation, Sicilian e4 c5 Nf3 e5
B40 French Variation, Sicilian; B40 e4 c5 Nf3 e6
B40 Wing Gambit Deferred, Sicilian e4 c5 Nf3 e6 b4
B40 Kramnik Variation, Sicilian e4 c5 Nf3 e6 c4
B41 B41 e4 c5 Nf3 e6 d4
B41 Accelerated Wimpy Variation, Sic e4 c5 Nf3 e6 d4 cxd4
B41 Paulsen; Kan Variation, Sicilian e4 c5 Nf3 e6 d4 cxd4 Nxd4 a6
B42 B42 e4 c5 Nf3 e6 d4 cxd4 Nxd4 a6 Bd3
B42 Polugaevsky Variation, Sicilian e4 c5 Nf3 e6 d4 cxd4 Nxd4 a6 Bd3 Bc5
B42 Swiss Cheese Variation, Sicilian e4 c5 Nf3 e6 d4 cxd4 Nxd4 a6 Bd3 g6
B41 Reti Variation, Sicilian e4 c5 Nf3 e6 d4 cxd4 Nxd4 a6 c4
B41 Hedgehog Variation, Sicilian e4 c5 Nf3 e6 d4 cxd4 Nxd4 a6 c4 g6
B41 Bronstein Variation, Sicilian e4 c5 Nf3 e6 d4 cxd4 Nxd4 a6 c4 Nf6 Nc3 Bb4 Bd3 Nc6
B43 B43 e4 c5 Nf3 e6 d4 cxd4 Nxd4 a6 Nc3
B44 Taimanov; Bastrikov, Paulsen Variation, Sicilian; B44 e4 c5 Nf3 e6 d4 cxd4 Nxd4 Nc6
B44 Szen Variation, Sicilian e4 c5 Nf3 e6 d4 cxd4 Nxd4 Nc6 Nb5
B44 Gary Gambit, Sicilian e4 c5 Nf3 e6 d4 cxd4 Nxd4 Nc6 Nb5 d6 c4 Nf6 N1c3 a6 Na3 d5
B45 B45 e4 c5 Nf3 e6 d4 cxd4 Nxd4 Nc6 Nc3
B46 B46 e4 c5 Nf3 e6 d4 cxd4 Nxd4 Nc6 Nc3 a6
B46 Taimanov Variation, Sicilian e4 c5 Nf3 e6 d4 cxd4 Nxd4 Nc6 Nc3 a6 Be2 Nge7
B45 Paulsen Variation, Sicilian e4 c5 Nf3 e6 d4 cxd4 Nxd4 Nc6 Nc3 Nf6 Ndb5 Bb4
B45 American Attack, Sicilian e4 c5 Nf3 e6 d4 cxd4 Nxd4 Nc6 Nc3 Nf6 Ndb5 Bb4 Nd6+
B47 Bastrikov Variation, Sicilian; B47 e4 c5 Nf3 e6 d4 cxd4 Nxd4 Nc6 Nc3 Qc7
B48 B48 e4 c5 Nf3 e6 d4 cxd4 Nxd4 Nc6 Nc3 Qc7 Be3
B49 B49 e4 c5 Nf3 e6 d4 cxd4 Nxd4 Nc6 Nc3 Qc7 Be3 a6 Be2
B47 Ponomariov Gambit, Sicilian e4 c5 Nf3 e6 d4 cxd4 Nxd4 Nc6 Nc3 Qc7 Ndb5 Qb8 Be3 a6 Bb6
B41 Anderssen; Counterattack Var, Sic e4 c5 Nf3 e6 d4 cxd4 Nxd4 Nf6
B41 Pin Variation; Sicilian CounterAttack e4 c5 Nf3 e6 d4 cxd4 Nxd4 Nf6 Nc3 Bb4
B41 Jaffe Variation, Sicilian e4 c5 Nf3 e6 d4 cxd4 Nxd4 Nf6 Nc3 Bb4 Bd3 e5
B41 Koch Variation, Sicilian e4 c5 Nf3 e6 d4 cxd4 Nxd4 Nf6 Nc3 Bb4 e5
B45 Four Knights Variation, Sicilian e4 c5 Nf3 e6 d4 cxd4 Nxd4 Nf6 Nc3 Nc6
B45 Cobra Variation, Sicilian e4 c5 Nf3 e6 d4 cxd4 Nxd4 Nf6 Nc3 Nc6 Ndb5 Bc5
B40 Gaw-Paw Variation, Sicilian e4 c5 Nf3 e6 d4 cxd4 Nxd4 Nf6 Nc3 Qb6
B40 Kveinis Variation, Sicilian e4 c5 Nf3 e6 d4 cxd4 Nxd4 Qb6
B41 Marshall Variation, Sicilian e4 c5 Nf3 e6 d4 d5
B27 Brussels Gambit, Sicilian e4 c5 Nf3 f5
B27 Double-Dutch Gambit, Sicilian e4 c5 Nf3 f5 exf5 Nh6
B27 Hyperaccelerated Dragon, Sicilian e4 c5 Nf3 g6
B27 Action Extension, Sicilian e4 c5 Nf3 g6 c4 Bh6
B27 Hyperaccelerated Pterodactyl, Sic e4 c5 Nf3 g6 d4 Bg7
B27 Frederico Variation, Sicilian e4 c5 Nf3 g6 d4 f5
B27 Sicilian Fred e4 c5 Nf3 g6 d4 f5
B27 Buecker Variation, Sicilian e4 c5 Nf3 h6
B30 Old Sicilian e4 c5 Nf3 Nc6
B30 Rossolimo (Nezmetdinov) Variation, Sicilian; B30 e4 c5 Nf3 Nc6 Bb5
B31 B31 e4 c5 Nf3 Nc6 Bb5 g6
B31 Gufeld Gambit, Sicilian e4 c5 Nf3 Nc6 Bb5 g6 O-O Bg7 c3 e5 d4
B31 Lutikov Gambit, Sicilian e4 c5 Nf3 Nc6 Bb5 g6 O-O Bg7 c3 Nf6 d4
B31 Gurgenidze Variation, Sicilian e4 c5 Nf3 Nc6 Bb5 g6 O-O Bg7 Re1 e5 b4
B31 San Francisco Gambit, Sicilian e4 c5 Nf3 Nc6 Bb5 Na5 b4
B32 B32 e4 c5 Nf3 Nc6 d4
B32 Nimzovich Variation, Sicilian; Nimzo-American Variation e4 c5 Nf3 Nc6 d4 cxd4 Nxd4 d5
B32 Bourdonnais; Lowenthal Var, Sic e4 c5 Nf3 Nc6 d4 cxd4 Nxd4 e5
B32 Kalashnikov Variation, Sicilian e4 c5 Nf3 Nc6 d4 cxd4 Nxd4 e5 Nb5 d6
B34 Accelerated Dragon; Fianchetto Var; B34 e4 c5 Nf3 Nc6 d4 cxd4 Nxd4 g6
B36 Maroczy Bind, Sicilian; B36 e4 c5 Nf3 Nc6 d4 cxd4 Nxd4 g6 c4
B37 B37 e4 c5 Nf3 Nc6 d4 cxd4 Nxd4 g6 c4 Bg7
B38 B38 e4 c5 Nf3 Nc6 d4 cxd4 Nxd4 g6 c4 Bg7 Be3
B39 Breyer Variation, Sicilian; B39 e4 c5 Nf3 Nc6 d4 cxd4 Nxd4 g6 c4 Bg7 Be3 Nf6 Nc3 Ng4
B36 Gurgenidze Variation, Sicilian e4 c5 Nf3 Nc6 d4 cxd4 Nxd4 g6 c4 Nf6 Nc3 Nxd4 Qxd4 d6
B35 B35 e4 c5 Nf3 Nc6 d4 cxd4 Nxd4 g6 Nc3 Bg7 Be3 Nf6 Bc4
B33 B33 e4 c5 Nf3 Nc6 d4 cxd4 Nxd4 Nf6
B33 Four Knights Variation, Sicilian e4 c5 Nf3 Nc6 d4 cxd4 Nxd4 Nf6 Nc3
B33 Lasker-Pelikan Variation, Sicilian e4 c5 Nf3 Nc6 d4 cxd4 Nxd4 Nf6 Nc3 e5
B33 Pelikan Variation, Sicilian e4 c5 Nf3 Nc6 d4 cxd4 Nxd4 Nf6 Nc3 e5 Ndb5 d6
B33 Chelyabinsk Variation, Sicilian e4 c5 Nf3 Nc6 d4 cxd4 Nxd4 Nf6 Nc3 e5 Ndb5 d6 Bg5 a6 Na3 b5
B33 Sveshnikov Variation, Sicilian e4 c5 Nf3 Nc6 d4 cxd4 Nxd4 Nf6 Nc3 e5 Ndb5 d6 Bg5 a6 Na3 b5 Bxf6 gxf6 Nd5 f5
B33 Bird Variation, Siclian e4 c5 Nf3 Nc6 d4 cxd4 Nxd4 Nf6 Nc3 e5 Ndb5 d6 Bg5 a6 Na3 Be6
B32 Retreat Variation, Sicilian e4 c5 Nf3 Nc6 d4 cxd4 Nxd4 Nf6 Nc3 e5 Nf3
B32 Godiva Variation, Sicilian e4 c5 Nf3 Nc6 d4 cxd4 Nxd4 Qb6
B32 Flohr Variation, Sicilian e4 c5 Nf3 Nc6 d4 cxd4 Nxd4 Qc7
B29 Nimzovich; Rubinstein Var, Sicilian; B29 e4 c5 Nf3 Nf6
B29 Advance Variation, Sicilian e4 c5 Nf3 Nf6 e5
B27 Mongoose Variation, Sicilian e4 c5 Nf3 Qa5
B27 Althouse; Stiletto Variation, Sicilian e4 c5 Nf3 Qa5
B27 Accelerated Paulsen, Sicilian e4 c5 Nf3 Qc7
B27 Quinteros Variation, Sicilian e4 c5 Nf3 Qc7
B20 Brick Variation, Sicilian e4 c5 Nh3
B10 Caro-Kann Defense; B10 e4 c6
B10 Hillbilly Attack, Caro-Kann e4 c6 Bc4
B10 Modern; English Variation, Accelerated Panov; Caro-Kann e4 c6 c4
B10 Breyer Variation, Caro-Kann e4 c6 d3
B10 Stein Attack, Caro-Kann e4 c6 d3 d5 Nd2 g6 g3 Bg7 Bg2 e5 Ngf3 Ne7 O-O O-O b4
B12 B12 e4 c6 d4
B12 Landau Gambit, Caro-Kann e4 c6 d4 d5 Bd3 Nf6 e5 Nfd7 e6
B12 Mieses Gambit, Caro e4 c6 d4 d5 Be3
B12 Diemer-Duhm Gambit, Caro e4 c6 d4 d5 c4
B12 Advance Variation, Caro e4 c6 d4 d5 e5
B12 Prins Attack, Caro-Kann e4 c6 d4 d5 e5 Bf5 b4
B12 Bayonet Variation, Caro e4 c6 d4 d5 e5 Bf5 g4
B12 Tal Variation, Caro-Kann e4 c6 d4 d5 e5 Bf5 h4
B12 Van der Wiel Attack, Caro-Kann e4 c6 d4 d5 e5 Bf5 Nc3
B12 Dreyev Defense, Caro-Kann e4 c6 d4 d5 e5 Bf5 Nc3 Qb6
B12 Bronstein Variation, Caro-Kann e4 c6 d4 d5 e5 Bf5 Ne2
B12 Short Variation, Caro-Kann e4 c6 d4 d5 e5 Bf5 Nf3
B12 Botvinnik-Carls Defense, Caro-Kann e4 c6 d4 d5 e5 c5
B13 Exchange Variation, Caro; B13 e4 c6 d4 d5 exd5
B13 Rubinstein Variation, Caro-Kann e4 c6 d4 d5 exd5 cxd3 Bd3 Nc6 c3 Nf6 Bf4
B13 Panov-Botvinnik; Gunderam Attack e4 c6 d4 d5 exd5 cxd5 c4
B14 B14 e4 c6 d4 d5 exd5 cxd5 c4 Nf6 Nc3
B14 Carlsbad Line, Caro-Kann e4 c6 d4 d5 exd5 cxd5 c4 Nf6 Nc3 Nc6 Bg5 e6
B14 Czerniak Line, Caro-Kann e4 c6 d4 d5 exd5 cxd5 c4 Nf6 Nc3 Nc6 Bg5 Qa5
B14 Reifir-Spielmann Line, Caro-Kann e4 c6 d4 d5 exd5 cxd5 c4 Nf6 Nc3 Nc6 Bg5 Qb6
B12 Maroczy Variation, Caro e4 c6 d4 d5 f3
B12 Fantasy; Lilienfisch Variation, Caro e4 c6 d4 d5 f3
B12 Maroczy Gambit, Caro-Kann e4 c6 d4 d5 f3 dxe4 fxe4 e5 Nf3 exd4 Bc4
B15 B15 e4 c6 d4 d5 Nc3
B15 Gurgenidze Variation, Caro e4 c6 d4 d5 Nc3 b5
B15 Von Hennig Gambit, Caro e4 c6 d4 d5 Nc3 dxe4 Bc4
B15 Milner-Barry Gambit, Caro; Rasa-Studier Gambit e4 c6 d4 d5 Nc3 dxe4 f3
B18 Classical Variation, Caro; B18 e4 c6 d4 d5 Nc3 dxe4 Nxe4 Bf5
B19 B19 e4 c6 d4 d5 Nc3 dxe4 Nxe4 Bf5 Ng3 Bg6 h4 h6 Nf3
B19 Seirawan Variation, Caro-Kann e4 c6 d4 d5 Nc3 dxe4 Nxe4 Bf5 Ng3 Bg6 h4 h6 Nf3 Nd7 e5 Bh7 Bd3 Bxd3 Qxd3
B18 Flohr Variation, Caro-Kann e4 c6 d4 d5 Nc3 dxe4 Nxe4 Bf5 Ng3 Bg6 Nh3
B16 Finnish Variation, Caro-Kann e4 c6 d4 d5 Nc3 dxe4 Nxe4 h6
B17 Karpov Variation, Caro-Kann; B17 e4 c6 d4 d5 Nc3 dxe4 Nxe4 Nd7
B17 Smyslov Variation, Caro-Kann e4 c6 d4 d5 Nc3 dxe4 Nxe4 Nd7 Bc4 Ngf6 Ng5 e6 Qe2 Nb6
B17 Tiviakov-Fischer Attack, Caro-Kann e4 c6 d4 d5 Nc3 dxe4 Nxe4 Nd7 Bc4 Ngf6 Nxf6+ Nxf6
B17 Kasparov Attack, Caro-Kann e4 c6 d4 d5 Nc3 dxe4 Nxe4 Nd7 Nf3 Ngf6 Ng3
B17 Ivanchuk Defense, Caro Kann e4 c6 d4 d5 Nc3 dxe4 Nxe4 Nd7 Ng5 Ndf6
B15 Knight Variation, Caro e4 c6 d4 d5 Nc3 dxe4 Nxe4 Nf6
B15 Tarrasch (Alekhine) Gambit, Caro e4 c6 d4 d5 Nc3 dxe4 Nxe4 Nf6 Bd3
B15 Tartakower Variation, Caro e4 c6 d4 d5 Nc3 dxe4 Nxe4 Nf6 Nxf6+ exf6
B15 Forgacs Variation, Caro Kann e4 c6 d4 d5 Nc3 dxe4 Nxe4 Nf6 Nxf6+ exf6 Bc4
B16 Nimzovich; Bronstein-Larsen, Caro; B16 e4 c6 d4 d5 Nc3 dxe4 Nxe4 Nf6 Nxf6+ gxf6
B15 Gurgenidze System, Caro-Kann e4 c6 d4 d5 Nc3 g6
B15 Gurgenidze Variation, Caro e4 c6 d4 d5 Nc3 g6 e5 Bg7 f4 h5
B15 Campomanes Attack, Caro e4 c6 d4 d5 Nc3 Nf6
B12 Modern Variation, Caro-Kann e4 c6 d4 d5 Nd2
B12 New Caro-Kann e4 c6 d4 d5 Nd2 g6
B12 Edinburgh Variation, Caro e4 c6 d4 d5 Nd2 Qb6
B12 Ulysses Gambit, Caro e4 c6 d4 d5 Nf3 dxe4 Ng5
B10 Massachussets Defense, Caro-Kann e4 c6 d4 f5
B12 De Bruycker Defense, Caro e4 c6 d4 Na6
B10 Masi Variation, Caro-Kann e4 c6 d4 Nf6
B11 B11 e4 c6 Nc3
B10 Scorpion-Horus Gambit, Caro-Kann e4 c6 Nc3 d5 d3 dxe4 Bg5
B11 Two Knights Attack, Caro Kann e4 c6 Nc3 d5 Nf3
B11 Mindeno Variation, Caro-Kann e4 c6 Nc3 d5 Nf3 Bg4
B11 Retreat Line, Mindeno Variation, Caro-Kann e4 c6 Nc3 d5 Nf3 Bg4 h3 Bh5
B12 Hector Gambit, Caro e4 c6 Nc3 d5 Nf3 dxe4 Ng5
B10 Goldman Variation, Caro e4 c6 Nc3 d5 Qf3
B10 Two Knights Variation, Caro e4 c6 Nf3 d5 Nc3
B01 Center Counter; Scandanavian; B01 e4 d5
B01 Zilbermints Gambit, Center Counter e4 d5 b4
B01 Blackbunre-Kloosterboer Gambit, Center Counter e4 d5 exd5 c6 dxc6 e5
B01 Atkinson (Kloosterboer) Variation, Center Counter e4 d5 exd5 c6 dxc6 e5
B01 Blackburne Gambit, Center Counter e4 d5 exd5 c6 dxc6 Nxc6
B01 Boehnke Gambit, Center Counter e4 d5 exd5 e5
B01 Boehnke Gambit Accepted, Center Counter e4 d5 exd5 e5 dxe6 Bxe6
B01 Marshall Gambit, Scandanavian G; Modern Variation, CC e4 d5 exd5 Nf6
B01 Panov Transfer, Center Counter e4 d5 exd5 Nf6 c4 c6
B01 Icelandic-Palme Gambit, CC e4 d5 exd5 Nf6 c4 e6
B01 Portuguese Variation, Center Counter e4 d5 exd5 Nf6 d4 Bg4
B01 Portuguese Gambit, Center Counter e4 d5 exd5 Nf6 d4 Bg4 f3 Bf5 Bb5+ Nbd7
B01 Kadas Gambit, Center Counter e4 d5 exd5 Nf6 d4 c6 dxc6 e5
B01 Wing Gambit, Center Counter e4 d5 exd5 Nf6 d4 g6 c4 b5
B01 Marshall Variation, Center Counter e4 d5 exd5 Nf6 d4 Nxd5
B01 Kiel Variation, Center Counter e4 d5 exd5 Nf6 d4 Nxd5 c4 Nb4
B01 Tomalty Gambit, Center Counter e4 d5 exd5 Nf6 d4 Nxd5 c4 Nf6 Nc3 c5
B01 Gipslis Variation, Center Counter e4 d5 exd5 Nf6 d4 Nxd5 Nf3 Bg4
B01 Richter Variation, Center Counter e4 d5 exd5 Nf6 d4 Nxd5 Nf3 g6
B01 Mieses-Kotroc Variation, Center Counter e4 d5 exd5 Qxd5
B01 Leonhardt (Rosen) Gambit, Center Counter e4 d5 exd5 Qxd5 Nc3 Qa5 b4
B01 Anderssen Variation, Center Counter e4 d5 exd5 Qxd5 Nc3 Qa5 d4 e5
B01 Collijn Variation, Center Counter e4 d5 exd5 Qxd5 Nc3 Qa5 d4 e5 Nf3 Bg4
B01 Mieses Variation, Center Counter e4 d5 exd5 Qxd5 Nc3 Qa5 d4 Nf6
B01 Gruenfeld Variation, Center Counter e4 d5 exd5 Qxd5 Nc3 Qa5 d4 Nf6 Nf3 Bf5 Ne5 c6 g4
B01 Lasker Variation, Center Counter e4 d5 exd5 Qxd5 Nc3 Qa5 d4 Nf6 Nf3 Bg4 h3
B01 Gubinsky-Melts Defense, Center Counter e4 d5 exd5 Qxd5 Nc3 Qd6
B01 Schiller-Pytel Variation, Center Counter e4 d5 exd5 Qxd5 Nc3 Qd6 d4 c6
B01 Bronstein Variation, Center Counter e4 d5 exd5 Qxd5 Nc3 Qd6 d4 Nf6 Nf3 a6
B01 Closed Scandavian e4 d5 Nc3
B07 B07 e4 d6
B07 Maroczy Defense, Pirc e4 d6 d4 e5
B07 Philidor Gambit, Pirc e4 d6 d4 e5 dxe5 Bd7
B07 Small Center Defense e4 d6 d4 e6
B07 Balogh Defense, Pirc e4 d6 d4 f5
B07 Pirc Defense e4 d6 d4 Nf6
B07 Lion’s Jaw, Pirc e4 d6 d4 Nf6 f3
B07 Czech Defense e4 d6 d4 Nf6 Nc3 c6
B07 Pirc; Ufimtsev; Antal Defense e4 d6 d4 Nf6 Nc3 g6
B07 Kholmov System, Pirc e4 d6 d4 Nf6 Nc3 g6 Bc4
B07 Classical System, Pirc e4 d6 d4 Nf6 Nc3 g6 Be2
B07 Chinese Variation, Pirc e4 d6 d4 Nf6 Nc3 g6 Be2 Bg7 g4
B07 Bayonet Attack, Pirc e4 d6 d4 Nf6 Nc3 g6 Be2 Bg7 h4
B07 Sveshnikov-Jansa Attack, Pirc e4 d6 d4 Nf6 Nc3 g6 Be3 c6 h3
B07 150 Attack e4 d6 d4 Nf6 Nc3 g6 Be3 c6 Qd2
B07 Panov; Opatijav; Byrne Variation, Pirc e4 d6 d4 Nf6 Nc3 g6 Bg5
B09 Austrian Attack, Pirc; B09 e4 d6 d4 Nf6 Nc3 g6 f4
B09 Ljubojevic Variation, Pirc e4 d6 d4 Nf6 Nc3 g6 f4 Bg7 Bc4
B09 Austrian; Yugoslav Defense, Pirc e4 d6 d4 Nf6 Nc3 g6 f4 Bg7 Nf3
B09 Dragon Formation, Pirc e4 d6 d4 Nf6 Nc3 g6 f4 Bg7 Nf3 c5
B09 Weiss Variation, Pirc e4 d6 d4 Nf6 Nc3 g6 f4 Bg7 Nf3 O-O Bd3
B09 Kurajica Variation, Pirc e4 d6 d4 Nf6 Nc3 g6 f4 Bg7 Nf3 O-O Be3
B09 Unzicker Attack, Pirc e4 d6 d4 Nf6 Nc3 g6 f4 Bg7 Nf3 O-O e5
B08 B08 e4 d6 d4 Nf6 Nc3 g6 Nf3
B08 Two Knights System, Pirc e4 d6 d4 Nf6 Nc3 g6 Nf3 Bg7
B08 Quiet System, Pirc e4 d6 d4 Nf6 Nc3 g6 Nf3 Bg7 Be2
B08 Parma Defense, Pirc e4 d6 d4 Nf6 Nc3 g6 Nf3 Bg7 Be2 O-O O-O Bg4
B08 Czech Defense, Pirc e4 d6 d4 Nf6 Nc3 g6 Nf3 Bg7 Be2 O-O O-O c6
B08 Chigorin Line, Pirc e4 d6 d4 Nf6 Nc3 g6 Nf3 Bg7 Be2 O-O O-O Nc6
B08 Schlechter Variation, Pirc e4 d6 d4 Nf6 Nc3 g6 Nf3 Bg7 h3
B07 Anti-Philidor e4 d6 d4 Nf6 Nc3 Nbd7 f4
B07 Roscher Gambit, Pirc e4 d6 d4 Nf6 Nf3
C20 King Pawn Game; C20 e4 e5
C20 Mengarini Opening e4 e5 a3
C20 Portuguese Opening e4 e5 Bb5
C20 Miguel Gambit e4 e5 Bb5 Bc5 b4
C23 Bishop’s Opening; C23 e4 e5 Bc4
C23 Anderssen Gambit e4 e5 Bc4 b5 Bxb5 c6
C23 Thorold Gambit e4 e5 Bc4 b5 Bxb5 f5
C23 Classical Variation, Bishop; Boi Variation e4 e5 Bc4 Bc5
C23 MacDonnell Gambit, Bishop e4 e5 Bc4 Bc5 b4
C23 Labourdonnais-Denker Gambit, Bishop e4 e5 Bc4 Bc5 b4 Bxb4 c3
C23 McDonnell Double Gambit, Bishop e4 e5 Bc4 Bc5 b4 Bxb4 f4
C23 Philidor Variation, Bishop e4 e5 Bc4 Bc5 c3
C23 Lewis Counter-Gambit, Bishop e4 e5 Bc4 Bc5 c3 d5
C23 Lewis Countergambit, Bishop e4 e5 Bc4 Bc5 c3 d5 Bxd5 Nf6
C23 Walker Variation, Bishop e4 e5 Bc4 Bc5 c3 d5 Bxd5 Nf6 d4
C23 Lewis Gambit, Bishop e4 e5 Bc4 Bc5 d4
C23 Stein Gambit, Bishop e4 e5 Bc4 Bc5 f4
C23 Lopez Variation, Bishop e4 e5 Bc4 Bc5 Qe2
C23 Lopez Gambit, Bishop e4 e5 Bc4 Bc5 Qe2 Nf6 f4
C23 Khan Gambit, Bishop e4 e5 Bc4 d5
C23 King’s Gambit Reversed, Bishop e4 e5 Bc4 f5
C23 Calabrese Counter-Gambit e4 e5 Bc4 f5
C24 Berlin Defense, Bishop; C24 e4 e5 Bc4 Nf6
C24 Spielmann Attack, Bishop e4 e5 Bc4 Nf6 d3 Bc5 Nc3
C24 Kitchner Folly, Bishop e4 e5 Bc4 Nf6 d3 Be7 Nf3 O-O
C24 Vienna Hybrid, Bishop e4 e5 Bc4 Nf6 d3 Nc6 Nc3
C24 Hromadka Variation, Bishop e4 e5 Bc4 Nf6 d3 Nc6 Nc3 Bb4 Ne2
C24 Ponziani Center Gambit, Bishop e4 e5 Bc4 Nf6 d4
C24 Warsaw Gambit, Bishop e4 e5 Bc4 Nf6 d4 exd4 c3
C24 Urusov; Ouroussoff; Keidansky G e4 e5 Bc4 Nf6 d4 exd4 Nf3
C24 Keidansky Gambit, Bishop e4 e5 Bc4 Nf6 d4 exd4 Nf3 Nxe4 Qxd4
C23 Kreijcik Gambit, Bishop e4 e5 Bc4 Nf6 f3 Bc5 Ne2 Nc6 b4
C23 Greco Gambit, Bishop e4 e5 Bc4 Nf6 f4
C23 Horwitz Gambit, Bishop e4 e5 Bc4 Nf6 Nc3 b5
C23 Blanel Gambit, Bishop e4 e5 Bc4 Nf6 Nc3 Nxe4
C23 Paschmann Gambit, Bishop e4 e5 Bc4 Nf6 Ne2 Nxe4 Nec3
C20 Tortoise Opening e4 e5 Bd3
C20 Macleod Attack e4 e5 c3
C20 Norwalder Gambit e4 e5 c3 d5 Qh5 Bd6
C20 Lasa Gambit e4 e5 c3 f5
C20 Whale Opening e4 e5 c4
C20 Bavarian Gambit e4 e5 c4 d5
C20 Clam Variation; Leonardis Variation e4 e5 d3
C20 Indian Opening e4 e5 d3
C20 Weber Gambit e4 e5 d3 d5 exd5 c6 dxc6 Nxc6
C20 King’s Gambit Reversed e4 e5 d3 f5
C20 Radisch Gambit e4 e5 d3 Nf6 f4 Bc5
C21 Center Game; C21 e4 e5 d4
C21 Beyer Gambit e4 e5 d4 d5
C21 Philidor Gambit e4 e5 d4 d6 dxe5 Bd7
C21 Center Game Accepted e4 e5 d4 exd4
C21 Von der Lasa Gambit e4 e5 d4 exd4 Bc4
C21 Ross Gambit, Center e4 e5 d4 exd4 Bd3
C21 Danish Gambit e4 e5 d4 exd4 c3
C21 Sorensen Defense, Center e4 e5 d4 exd4 c3 d5
C21 Danish Gambit Accepted e4 e5 d4 exd4 c3 dxc3 Bc4 cxb2 Bxb2
C21 Copenhagen Defense, Danish Gambit e4 e5 d4 exd4 c3 dxc3 Bc4 cxb2 Bxb2 Bb4+
C21 Schlechter Defense, Center e4 e5 d4 exd4 c3 dxc3 Bc4 cxb2 Bxb2 d5
C21 Classical Defense, Danish Gambit e4 e5 d4 exd4 c3 dxc3 Bc4 cxb2 Bxb2 Nf6
C21 Chigorin Defense, Danish Gambit e4 e5 d4 exd4 c3 dxc3 Bc4 cxb2 Bxb2 Qe7
C21 Svenonius Defense, Center e4 e5 d4 exd4 c3 Ne7
C21 Halasz-McDonnell Gambit e4 e5 d4 exd4 f4
C21 Crocodile Variation, Center Game e4 e5 d4 exd4 f4 Bc5 Nf3 Nc6 c3
C21 Lanc-Arnold Gambit, Center e4 e5 d4 exd4 Nf3 Bc5 c3
C21 Scippler Gambit, Center e4 e5 d4 exd4 Nf3 Bc5 c3 dxc3 Bc4
C22 C22 e4 e5 d4 exd4 Qxd4
C22 Hall Variation, Center e4 e5 d4 exd4 Qxd4 Nc6 Qc4
C22 Paulsen Attack Variation, Center e4 e5 d4 exd4 Qxd4 Nc6 Qe3
C22 Berger Variation, Center e4 e5 d4 exd4 Qxd4 Nc6 Qe3 Nf6
C22 Kupreichik Variation, Center e4 e5 d4 exd4 Qxd4 Nc6 Qe3 Nf6 Nc3 Bb4 Bd2 O-O O-O-O Re8 Bc4
C20 King’s Head e4 e5 f3
C20 Walkerling e4 e5 f3 Nf6
C20 Krejcik Gambit e4 e5 f3 Nf6 Bc4 Bc5 Ne2 Nc6 b4
C20 King’s Head Opening e4 e5 f3 Nf6 Nc3
C30 King’s Gambit; C30 e4 e5 f4
C30 Classical Defense, KGD e4 e5 f4 Bc5
C30 Heath Variation, KGD; Rotlewi Countergambit e4 e5 f4 Bc5 Nf3 d6 b4
C30 Marshall (Euwe) Attack, KGD e4 e5 f4 Bc5 Nf3 d6 c3 Bg4 fxe5 dxe5 Qa4+
C30 Rubinstein Countergambit, KGD e4 e5 f4 Bc5 Nf3 d6 c3 f5
C30 Svenonius Variation, KGD e4 e5 f4 Bc5 Nf3 d6 Nc3 Nf6 Bc4 Nc6 d3 Bg4
C30 Senechaud Counter-Gambit, KGD e4 e5 f4 Bc5 Nf3 g5
C30 Mafia Defense, KGD e4 e5 f4 c5
C31 Falkbeer Counter-Gambit, KGD; C31 e4 e5 f4 d5
C31 Hinrichsen Gambit, KGD e4 e5 f4 d5 d4
C31 Falkbeer Countergambit Accepted, KGD e4 e5 f4 d5 exd5
C31 Miles Gambit, KGD e4 e5 f4 d5 exd5 Bc5
C31 Nimzovich-Marshall Variation, KGD e4 e5 f4 d5 exd5 c6
C31 Marshall C-G, KGD e4 e5 f4 d5 exd5 c6
C31 Pickler Gambit, KGD e4 e5 f4 d5 exd5 c6 dxc6 Bc5
C32 Staunton Line, KGD; C32 e4 e5 f4 d5 exd5 e4
C31 Nimzovich Variation, KGD; Anderssen Attack e4 e5 f4 d5 exd5 e4 Bb5+
C32 Reti (Charousek) Variation, KGD e4 e5 f4 d5 exd5 e4 d3
C32 Morphy Defense, KGD e4 e5 f4 d5 exd5 e4 d3 Nf6 Nc3 Bb4 Bd2 e3
C32 Keres Variation, KGD e4 e5 f4 d5 exd5 e4 d3 Nf6 Nd2
C32 Old Line, Falkbeer Countergambit, KGD e4 e5 f4 d5 exd5 e4 d3 Nf6 Qe2
C32 Modern Transfer, Falkbeer Countergambit, KGD e4 e5 f4 d5 exd5 exf4
C31 Blackbunre Attack, KGD e4 e5 f4 d5 Nf3
C33 King’s Gambit Accepted; C33 e4 e5 f4 exf4
C33 Orsini Gambit, KGA e4 e5 f4 exf4 b3
C33 Schurig Gambit, KGA e4 e5 f4 exf4 Bb5
C33 Bishop’s Gambit, KGA e4 e5 f4 exf4 Bc4
C33 Kieseritzky Gambit, Bishop’s Gambit, KGA e4 e5 f4 exf4 Bc4 b5
C33 Lopez Defense, KGA e4 e5 f4 exf4 Bc4 c6
C33 Bledow; Morphy Defense, KGA e4 e5 f4 exf4 Bc4 d5
C33 Bledow Countergambit, KGA e4 e5 f4 exf4 Bc4 d5 Bxd5 Nf6
C33 Gianutio Counter-Gambit, KGA e4 e5 f4 exf4 Bc4 f5
C33 Anderssen Defense, KGA e4 e5 f4 exf4 Bc4 g5
C33 Maurian Defense, KGA e4 e5 f4 exf4 Bc4 Nc6
C33 Cozio; Hanneken; Prussian; Lichtenhein e4 e5 f4 exf4 Bc4 Nf6
C33 Bogoljubow Variation, KGA e4 e5 f4 exf4 Bc4 Nf6 Nc3
C33 Bogoljubov; Jaenisch Variation, KGA e4 e5 f4 exf4 Bc4 Nf6 Nc3 c6
C33 Bryan; Kieseritzky Gambit, KGA e4 e5 f4 exf4 Bc4 Qh4+ Kf1 b5
C33 Greco Variation, KGA e4 e5 f4 exf4 Bc4 Qh4+ Kf1 Bc5
C33 Cozio Variation, KGA e4 e5 f4 exf4 Bc4 Qh4+ Kf1 d6
C33 Classical Defense, KGA; Lopez Variation e4 e5 f4 exf4 Bc4 Qh4+ Kf1 g5
C33 Grimm Attack, KGA e4 e5 f4 exf4 Bc4 Qh4+ Kf1 g5 Nc3 Bg7 d4 d6 e5
C33 MacDonnell Attack, KGA e4 e5 f4 exf4 Bc4 Qh4+ Kf1 g5 Nc3 Bg7 d4 Ne7 g3
C33 McDonnell Attack, KGA e4 e5 f4 exf4 Bc4 Qh4+ Kf1 g5 Nc3 Bg7 g3
C33 Fraser Variation, KGA e4 e5 f4 exf4 Bc4 Qh4+ Kf1 g5 Nc3 Bg7 g3 fxg3 Qf3
C33 Cozio Attack, KGA e4 e5 f4 exf4 Bc4 Qh4+ Kf1 g5 Qf3
C33 Boden Variation, KGA e4 e5 f4 exf4 Bc4 Qh4+ Kf1 Nc6
C33 Jaenisch Variation, KGA e4 e5 f4 exf4 Bc4 Qh4+ Kf1 Nf6
C33 Jaenisch Variation, KGA e4 e5 f4 exf4 Bc4 Qh4+ Kf1 Qf6
C33 Lesser Bishop; Tartakower e4 e5 f4 exf4 Be2
C33 Weiss Defense, KGA e4 e5 f4 exf4 Be2 f5 exf5 d6
C33 Central; Polerio; Willemson, Steinitz e4 e5 f4 exf4 d4
C33 Gaga Gambit, KGA e4 e5 f4 exf4 g3
C33 Gama Gambit, KGA e4 e5 f4 exf4 g3 fxg3 Nf3
C33 Leonardo (Stamma) Gambit, KGA e4 e5 f4 exf4 h4
C33 Drunken King, KGA e4 e5 f4 exf4 Kf2
C33 Tumbleweed; King’s Own, KGA e4 e5 f4 exf4 Kf2
C33 Keres, Mason, Parnu, Requena e4 e5 f4 exf4 Nc3
C33 Requena Gambit, KGA e4 e5 f4 exf4 Nc3 Qh4+
C33 Paris Gambit, KGA e4 e5 f4 exf4 Ne2
C34 King’s Knight Gambit, KGA; C34 e4 e5 f4 exf4 Nf3
C35 Cunningham Gambit, KGA; C35 e4 e5 f4 exf4 Nf3 Be7
C35 Wild Cunningham Gambit, KGA e4 e5 f4 exf4 Nf3 Be7 Bc4 Bh4+
C35 Bertin; Three Pawns Gambit, KGA e4 e5 f4 exf4 Nf3 Be7 Bc4 Bh4+ g3
C35 Neo-Cunningham Gambit, KGA; McCormick Defense e4 e5 f4 exf4 Nf3 Be7 Bc4 Nf6
C36 Scandinavian Variation, KGA; Modern Defense, KGA; C36 e4 e5 f4 exf4 Nf3 d5
C36 Abbazia Defense, KGA e4 e5 f4 exf4 Nf3 d5 exd5 Nf6
C34 Fischer Defense, KGA e4 e5 f4 exf4 Nf3 d6
C34 Schulder Gambit, KGA e4 e5 f4 exf4 Nf3 d6 b4
C34 Gianutio Countergambit, KGA e4 e5 f4 exf4 Nf3 f5
C37 C37 e4 e5 f4 exf4 Nf3 g5
C37 Ghulam Kassim; Koch Gambit, KGA e4 e5 f4 exf4 Nf3 g5 Bc4
C38 Traditional Variation, KGA; C38 e4 e5 f4 exf4 Nf3 g5 Bc4 Bg7
C38 Mayet Gambit, KGA e4 e5 f4 exf4 Nf3 g5 Bc4 Bg7 d4 d6 c3
C38 Philidor Gambit, KGA e4 e5 f4 exf4 Nf3 g5 Bc4 Bg7 h4
C38 Greco Gambit, KGA e4 e5 f4 exf4 Nf3 g5 Bc4 Bg7 h4 h6 d4 d6
C38 Greco; Calabrian Gambit, KGA e4 e5 f4 exf4 Nf3 g5 Bc4 Bg7 h4 h6 d4 d6 hxg5 hxg5 Rxh8 Rxh8 Nc3
C38 Schultz Variation, KGA e4 e5 f4 exf4 Nf3 g5 Bc4 Bg7 h4 h6 d4 d6 Qd3
C38 Hanstein Gambit, KGA e4 e5 f4 exf4 Nf3 g5 Bc4 Bg7 O-O
C37 Middleton Counter-Gambit, KGA e4 e5 f4 exf4 Nf3 g5 Bc4 d6 O-O Bg4 h3 h5 hxg4
C37 Greco-Lolli; Wild Muzio Gambit, KGA e4 e5 f4 exf4 Nf3 g5 Bc4 g4 Bxf7+
C37 Young Variation, KGA e4 e5 f4 exf4 Nf3 g5 Bc4 g4 Bxf7+ Kxf7 O-O gxf3 Qxf3 Qf6 d4 Qxd4+ Be3
C37 Koch; Ghulam Kassim Gambit, KGA e4 e5 f4 exf4 Nf3 g5 Bc4 g4 d4
C37 Kotov Gambit e4 e5 f4 exf4 Nf3 g5 Bc4 g4 d4 gxf3 Bxf4
C37 Ghulam-Kassim Gambit, KGA e4 e5 f4 exf4 Nf3 g5 Bc4 g4 d4 gxf3 Qxf3
C37 Australian Gambit, KGA e4 e5 f4 exf4 Nf3 g5 Bc4 g4 h4
C37 MacDonnell Gambit, KGA e4 e5 f4 exf4 Nf3 g5 Bc4 g4 Nc3
C37 Salvio Gambit, KGA e4 e5 f4 exf4 Nf3 g5 Bc4 g4 Ne5
C37 Cochrane Variation, KGA e4 e5 f4 exf4 Nf3 g5 Bc4 g4 Ne5  Qh4+ Kf1 f3
C37 Herzfeld; Portuguese; Vienna, KGA e4 e5 f4 exf4 Nf3 g5 Bc4 g4 Ne5  Qh4+ Kf1 Nc6
C37 Santa Maria Defense, KGA e4 e5 f4 exf4 Nf3 g5 Bc4 g4 Ne5  Qh4+ Kf1 Nf6
C37 Silberschmidt Variation, KGA e4 e5 f4 exf4 Nf3 g5 Bc4 g4 Ne5  Qh4+ Kf1 Nh6
C37 Anderssen Counter-Attack, KGA e4 e5 f4 exf4 Nf3 g5 Bc4 g4 Ne5 Qh4+ Kf1 Nh6 d4 d6
C37 Muzio-Polerio Gambit, KGA; Wild Muzio e4 e5 f4 exf4 Nf3 g5 Bc4 g4 O-O
C37 Brentano Defense, KGA e4 e5 f4 exf4 Nf3 g5 Bc4 g4 O-O d5
C37 Holloway Defense, KGA e4 e5 f4 exf4 Nf3 g5 Bc4 g4 O-O gxf3 Qxf3 Nc6
C37 From Defense, KGA e4 e5 f4 exf4 Nf3 g5 Bc4 g4 O-O gxf3 Qxf3 Qe7
C37 Sarratt Defense, KGA e4 e5 f4 exf4 Nf3 g5 Bc4 g4 O-O gxf3 Qxf3 Qf6
C37 Young Gambit, KGA e4 e5 f4 exf4 Nf3 g5 Bc4 g4 O-O gxf3 Qxf3 Qf6 Bxf7+ Kxf7 d4 Qxd4+ Be3 Qf6
C37 Double Muzio Gambit, KGA e4 e5 f4 exf4 Nf3 g5 Bc4 g4 O-O gxf3 Qxf3 Qf6 e5 Qxe5 Bxf7+
C37 Paulsen Defense, KGA e4 e5 f4 exf4 Nf3 g5 Bc4 g4 O-O gxf3 Qxf3 Qf6 e5 Qxe5 d3 Bh6 Nc3 Ne7 Bd2
C37 Bello Gambit, KGA e4 e5 f4 exf4 Nf3 g5 Bc4 g4 O-O gxf3 Qxf3 Qf6 Nc3
C37 Baldwin Gambit, KGA e4 e5 f4 exf4 Nf3 g5 Bc4 g4 O-O gxf3 Qxf3 Qf6 Nc3 Qd4+ Kh1 Qxc4 Nd5
C37 Kling & Horwitz Counter-Attack, KGA e4 e5 f4 exf4 Nf3 g5 Bc4 g4 O-O Qe7
C37 Blachy Gambit, KGA e4 e5 f4 exf4 Nf3 g5 Bc4 Nc6
C37 Rosentreter Gambit, KGA e4 e5 f4 exf4 Nf3 g5 d4
C37 Soerensen Gambit, KGA e4 e5 f4 exf4 Nf3 g5 d4 Bg4 Nc3
C37 Sorensen Gambit, KGA e4 e5 f4 exf4 Nf3 g5 d4 Bg4 Ne5
C37 Bird Gambit, KGA e4 e5 f4 exf4 Nf3 g5 d4 Bg4 Ne5 Qh4+ g3
C37 Rosentreter-Testa Gambit, KGA e4 e5 f4 exf4 Nf3 g5 d4 g4 Bxf4
C39 C39 e4 e5 f4 exf4 Nf3 g5 h4
C39 Kieseritzky Gambit, KGA e4 e5 f4 exf4 Nf3 g5 h4 g4 Ne5
C39 Paulsen Defense, KGA e4 e5 f4 exf4 Nf3 g5 h4 g4 Ne5 Bg7
C39 Campbell; Brentano; Morphy Var, KGA e4 e5 f4 exf4 Nf3 g5 h4 g4 Ne5 d5
C39 Green; Kolisch Variation, KGA e4 e5 f4 exf4 Nf3 g5 h4 g4 Ne5 d6
C39 Long Whip Variation, KGA e4 e5 f4 exf4 Nf3 g5 h4 g4 Ne5 h5
C39 Cotter Gambit, KGA e4 e5 f4 exf4 Nf3 g5 h4 g4 Ne5 h6 Nxf7
C39 Neumann Defense, KGA e4 e5 f4 exf4 Nf3 g5 h4 g4 Ne5 Nc6
C39 Berlin Defense, KGA e4 e5 f4 exf4 Nf3 g5 h4 g4 Ne5 Nf6
C39 Anderssen Defense, Kieseritsky Gambit, KGA e4 e5 f4 exf4 Nf3 g5 h4 g4 Ne5 Nf6 Bc4 d5 exd5 Bd6
C39 Anderssen-Cordel Gambit, KGA e4 e5 f4 exf4 Nf3 g5 h4 g4 Ne5 Nf6 Bc4 d5 exd5 Bd6 d4 Nh5 Bxf4 Nxf4
C39 Rice Gambit, KGA e4 e5 f4 exf4 Nf3 g5 h4 g4 Ne5 Nf6 Bc4 d5 exd5 Bd6 O-O
C39 Rice Gambit Accepted, KGA e4 e5 f4 exf4 Nf3 g5 h4 g4 Ne5 Nf6 Bc4 d5 exd5 Bd6 O-O Bxe5
C39 Paulsen Defense Deferred, KGA e4 e5 f4 exf4 Nf3 g5 h4 g4 Ne5 Nf6 Bc4 d5 exd5 Bg7
C39 Rubinstein Variation, KGA e4 e5 f4 exf4 Nf3 g5 h4 g4 Ne5 Nf6 d4
C39 Riviere Variation, KGA e4 e5 f4 exf4 Nf3 g5 h4 g4 Ne5 Nf6 Nxg4 d5
C39 Rosenthal; Stockwhip Var, KGA e4 e5 f4 exf4 Nf3 g5 h4 g4 Ne5 Qe7
C39 Allgaier; Cotter Cambit, KGA e4 e5 f4 exf4 Nf3 g5 h4 g4 Ng5
C39 Walker (Urusov) Attack, KGA e4 e5 f4 exf4 Nf3 g5 h4 g4 Ng5 h6 Nxf7 Kxf7 Bc4+
C39 Urusov Attack, KGA e4 e5 f4 exf4 Nf3 g5 h4 g4 Ng5 h6 Nxf7 Kxf7 Bc4+ d5 Bxd5+ Ke8 d4
C39 Thorold Attack, KGA e4 e5 f4 exf4 Nf3 g5 h4 g4 Ng5 h6 Nxf7 Kxf7 d4
C39 Horny Defense, KGA e4 e5 f4 exf4 Nf3 g5 h4 g4 Ng5 h6 Nxf7 Kxf7 Qxg4 Nf6 Qxf4
C37 Quaade; Taylor Variation, KGA e4 e5 f4 exf4 Nf3 g5 Nc3
C34 Becker; Anti-Kieseritzky Var, KGA e4 e5 f4 exf4 Nf3 h6
C34 MacLeod Defense, KGA e4 e5 f4 exf4 Nf3 Nc6
C34 Bonsch-Osmolovsky Variation, KGA e4 e5 f4 exf4 Nf3 Ne7
C34 Schallop Defense, KGA e4 e5 f4 exf4 Nf3 Nf6
C34 Tashkent Attack, KGA e4 e5 f4 exf4 Nf3 Nf6 e5 Nh5 g4
C33 Eisenberg Variation, KGA e4 e5 f4 exf4 Nh3
C33 Basman Gambit, KGA e4 e5 f4 exf4 Qe2
C33 Bilguer-Mirage Variation, KGA e4 e5 f4 exf4 Qe2
C33 Breyer; Hungarian; Carrera, KGA e4 e5 f4 exf4 Qf3
C33 Dodo Gambit, KGA e4 e5 f4 exf4 Qg4
C33 Carrera Gambit, KGA e4 e5 f4 exf4 Qh5
C30 Panteldakis Countergambit, KGD e4 e5 f4 f5
C30 Soller-Zilbermints Gambit, KGD e4 e5 f4 f6 fxe5 Nc6
C30 Zilbermints Double Countergambit; KGD e4 e5 f4 g5
C30 Queen’s Knight Defense, KGD e4 e5 f4 Nc6
C30 Miles Defense, KGD e4 e5 f4 Nc6 Nf3 f5
C30 Zilbermints Double Gambit I, KGD e4 e5 f4 Nc6 Nf3 g5
C30 Petrov’s Defense, KGD e4 e5 f4 Nf6
C30 Norwalde (Norwalder) Variation, KGD e4 e5 f4 Qf6
C30 Schubert Variation, KGD e4 e5 f4 Qf6 Nc3 Qxf4 d4
C30 Keene Defense, KGD e4 e5 f4 Qh4+ g3 Qe7
C25 Vienna; Hamppe Opening; C25 e4 e5 Nc3
C25 Zhuravlev Counter-Gambit, Vienna e4 e5 Nc3 Bb4 Qg4
C25 Zhuraviev Countergambit, Vienna e4 e5 Nc3 Bb4 Qg4 Nf6
C25 Anderssen Defense, Vienna e4 e5 Nc3 Bc5
C25 Hamppe-Mietner Variation, Vienna e4 e5 Nc3 Bc5 Na4
C25 Giraffe Attack, Vienna e4 e5 Nc3 Bc5 Qg4
C25 Omaha Gambit, Vienna e4 e5 Nc3 d6 f4
C23 Meitner-Mieses Gambit, Vienna e4 e5 Nc3 Nc6 Bc4 Bc5 Qg4 Qf6 Nd5
C23 Bronstein Gambit, Vienna e4 e5 Nc3 Nc6 Bc4 Nf6 f4 Nxe4 Nf3
C25 Fyfe Gambit, Vienna e4 e5 Nc3 Nc6 d4
C25 Philidor Countergambit, Vienna e4 e5 Nc3 Nc6 d4 f5
C25 Alapin Variation, Vienna e4 e5 Nc3 Nc6 f4
C25 Vienna Gambit e4 e5 Nc3 Nc6 f4
C25 Quelle Gambit, Vienna e4 e5 Nc3 Nc6 f4 Bc5 fxe5 d6
C25 Steinitz Gambit, Vienna e4 e5 Nc3 Nc6 f4 exf4 d4
C25 Fraser-Minckwitz Variation, Vienna e4 e5 Nc3 Nc6 f4 exf4 d4 Qh4+ Ke2 b6
C25 Zukertort Defense, Vienna e4 e5 Nc3 Nc6 f4 exf4 d4 Qh4+ Ke2 d5
C25 Paulsen Defense, Vienna e4 e5 Nc3 Nc6 f4 exf4 d4 Qh4+ Ke2 d6
C25 Soerensen Defense, Vienna e4 e5 Nc3 Nc6 f4 exf4 d4 Qh4+ Ke2 g5
C25 Knight Variation, Vienna e4 e5 Nc3 Nc6 f4 exf4 Nf3
C25 Cunningham Defense, Vienna e4 e5 Nc3 Nc6 f4 exf4 Nf3 Be7
C25 Hamppe-Muzio Gambit, Vienna e4 e5 Nc3 Nc6 f4 exf4 Nf3 g5 Bc4 g4 O-O
C25 Pierce Gambit, Vienna e4 e5 Nc3 Nc6 f4 exf4 Nf3 g5 d4
C25 Hamppe-Allgaier Gambit, Vienna e4 e5 Nc3 Nc6 f4 exf4 Nf3 g5 h4 g4 Ng5
C25 Hamppe-Allgaier-Thorold Gambit e4 e5 Nc3 Nc6 f4 exf4 Nf3 g5 h4 g4 Ng5 h6 Nxf7 Kxf7 d4
C25 Paulsen Variation, Vienna e4 e5 Nc3 Nc6 g3
C25 Mariotti Gambit e4 e5 Nc3 Nc6 g3 Bc5 Bg2 h5 Nf3 h4
C26 Falkbeer Variation, Vienna; C26 e4 e5 Nc3 Nf6
C26 Mengarini Variation, Vienna e4 e5 Nc3 Nf6 a3
C27 Stanley Variation, Vienna; C27 e4 e5 Nc3 Nf6 Bc4
C27 Reversed Spanish, Vienna e4 e5 Nc3 Nf6 Bc4 Bb4
C27 Bishop Variation, Vienna e4 e5 Nc3 Nf6 Bc4 Bc5
C27 Eifel Gambit, Vienna e4 e5 Nc3 Nf6 Bc4 Bc5 Nge2 b5
C28 Three Knights Variation, Vienna; C28 e4 e5 Nc3 Nf6 Bc4 Nc6
C27 Modern Variation, Vienna e4 e5 Nc3 Nf6 Bc4 Nxe4
C27 Boden-Kieseritzky Gambit, Vienna e4 e5 Nc3 Nf6 Bc4 Nxe4 Nf3
C27 Monster Variation, Vienna e4 e5 Nc3 Nf6 Bc4 Nxe4 Qh5 Nd6 Bb3 Be7
C27 Alekhine Variation, Vienna e4 e5 Nc3 Nf6 Bc4 Nxe4 Qh5 Nd6 Bb3 Be7 Nf3 Nc6 Nxe5
C27 Adams Gambit, Vienna e4 e5 Nc3 Nf6 Bc4 Nxe4 Qh5 Nd6 Bb3 Nc6 d4
C27 Frankenstein-Dracula Var, Vienna e4 e5 Nc3 Nf6 Bc4 Nxe4 Qh5 Nd6 Bb3 Nc6 Nb5 g6 Qf3 f5 Qd5 Qe7
C29 Vienna Gambit, Vienna; C29 e4 e5 Nc3 Nf6 f4
C29 Steinitz Variation, Vienna e4 e5 Nc3 Nf6 f4 d5 d3
C26 Oxford Variation, Vienna e4 e5 Nc3 Nf6 f4 d5 fxe5 Nxe4 d3
C29 Wurzburger Trap, Vienna e4 e5 Nc3 Nf6 f4 d5 fxe5 Nxe4 d3 Qh4 g3 Nxg3 Nf3 Qh5 Nd5 Bxd5 Nf4
C29 Breyer Variation, Vienna e4 e5 Nc3 Nf6 f4 d5 fxe5 Nxe4 Nf3 Be7
C29 Kaufmann Variation, Vienna e4 e5 Nc3 Nf6 f4 d5 fxe5 Nxe4 Nf3 Bg4 Qe2
C29 Paulsen Attack, Vienna e4 e5 Nc3 Nf6 f4 d5 fxe5 Nxe4 Qf3
C29 Bardeleben Variation, Vienna e4 e5 Nc3 Nf6 f4 d5 fxe5 Nxe4 Qf3 f5
C26 Mieses Variation, Vienna e4 e5 Nc3 Nf6 g3
C25 Polluck Gambit, Vienna e4 e5 Nc3 Nf6 g3 Bc5 Bg2 Nc6 Nge2 d5 exd5
C25 Erben Gambit, Vienna e4 e5 Nc3 Nf6 g3 d5 exd5 c6
C20 Alapin Opening e4 e5 Ne2
C40 King’s Knight Opening; C40 e4 e5 Nf3
C40 Glatz Gambit; Busch-Gass Gambit e4 e5 Nf3 Bc5
C25 Hamppe Meitner, Vienna e4 e5 Nf3 Bc5 Na4
C40 Chiodini Gambit e4 e5 Nf3 Bc5 Nxe5 Nc6
C40 Jalalabad Defense e4 e5 Nf3 c5
C40 Gunderam Gambit e4 e5 Nf3 c6
C40 Queen’s Pawn Counter-Gambit; Elephant Gambit e4 e5 Nf3 d5
C40 Maroczy; Elephant Gambit e4 e5 Nf3 d5 exd5 Bd6
C40 Halasz-Jacobsen Gambit e4 e5 Nf3 d5 exd5 Bd6
C40 Maroczy Gambit e4 e5 Nf3 d5 exd5 Bd6
C40 Paulsen Counter-Gambit e4 e5 Nf3 d5 exd5 e4
C40 Wasp Variation e4 e5 Nf3 d5 Nxe5 dxe4 Bc4 Qg5
C41 Philidor Defense; C41 e4 e5 Nf3 d6
C41 Lopez Counter-Gambit, Philidor e4 e5 Nf3 d6 Bc4 f5
C41 Philidor Gambit e4 e5 Nf3 d6 d4 Bd7
C41 Alapin-Blackburne Gambit, Philidor e4 e5 Nf3 d6 d4 Bg4 dxe5 Nd7
C41 Exchange Variation, Philidor e4 e5 Nf3 d6 d4 exd4
C41 Morphy Gambit, Philidor e4 e5 Nf3 d6 d4 exd4 Bc4
C41 Bird Gambit, Philidor e4 e5 Nf3 d6 d4 exd4 c3
C41 Paulsen Attack, Philidor e4 e5 Nf3 d6 d4 exd4 Nxd4 d5 exd5
C41 Larsen Variation, Philidor e4 e5 Nf3 d6 d4 exd4 Nxd4 g6
C41 Boden Variation, Philidor e4 e5 Nf3 d6 d4 exd4 Qxd4 Bd7
C41 Philidor Counter Attack e4 e5 Nf3 d6 d4 f5
C41 Zukertort Variation, Philidor e4 e5 Nf3 d6 d4 f5 Nc3
C41 Hanham; Lord Variation, Philidor e4 e5 Nf3 d6 d4 Nd7
C41 Delmar Variation, Philidor e4 e5 Nf3 d6 d4 Nd7 Bc4 c6 c3
C41 Schlechter Variation, Philidor e4 e5 Nf3 d6 d4 Nd7 Bc4 c6 Nc3
C41 Krause Variation, Philidor e4 e5 Nf3 d6 d4 Nd7 Bc4 c6 O-O
C41 Steiner Variation, Philidor e4 e5 Nf3 d6 d4 Nd7 Bc4 c6 O-O Be7 dxe5
C41 Sharp Variation, Philidor e4 e5 Nf3 d6 d4 Nd7 Bc4 Nb6
C41 Lion Variation, Philidor e4 e5 Nf3 d6 d4 Nd7 Nc3 Nf6
C41 Jaenisch Counter-Attack, Philidor; Nimzovich Variation e4 e5 Nf3 d6 d4 Nf6
C41 Klein Variation, Philidor e4 e5 Nf3 d6 d4 Nf6 Bc4
C41 Sokolsky Variation, Philidor e4 e5 Nf3 d6 d4 Nf6 dxe5 Nxe4 Nbd2
C41 Rellstab Variation, Philidor e4 e5 Nf3 d6 d4 Nf6 dxe5 Nxe4 Qd5
C41 Larobok Variation, Philidor e4 e5 Nf3 d6 d4 Nf6 Nc3 Nbd7
C41 Locock Variation, Philidor e4 e5 Nf3 d6 d4 Nf6 Ng5 h6 Nxf7
C40 Latvian; Greco Counter-Gambit e4 e5 Nf3 f5
C40 Senechaud Gambit, Latvian e4 e5 Nf3 f5 b4
C40 Mayet Attack, Latvian e4 e5 Nf3 f5 Bc4
C40 Strautins Gambit, Latvian e4 e5 Nf3 f5 Bc4 b5
C40 Polerio-Svedenborg Variation, Latvian e4 e5 Nf3 f5 Bc4 fxe4 Nxe5 d5
C40 Poisoned Pawn Variation, Latvian e4 e5 Nf3 f5 Bc4 fxe4 Nxe5 Qg5 d4 Qxg2
C40 Duke of Courland Variation, Latvian e4 e5 Nf3 f5 Bc4 fxe4 Nxe5 Qg5 d4 Qxg2 Qh5 g6 Bf7 Kd8 Bg6 Qh1
C40 Morgado Defense, Latvian e4 e5 Nf3 f5 Bc4 Nf6
C40 Diepstraten Countergambit, Latvian e4 e5 Nf3 f5 c4
C40 Clam Gambit, Latvian e4 e5 Nf3 f5 d3 Nc6 exf5
C40 Mason Countergambit, Latvian e4 e5 Nf3 f5 d4
C40 Latvian Gambit Accepted e4 e5 Nf3 f5 exf5
C40 Lobster Gambit, Latvian e4 e5 Nf3 f5 g4
C40 Mlotkowski Variation, Latvian e4 e5 Nf3 f5 Nc3
C40 Fraser Defense, Latvian e4 e5 Nf3 f5 Nxe5 Nc6
C40 Corkscrew Counter-Gambit, Latvian e4 e5 Nf3 f5 Nxe5 Nf6 Bc4 fxe4 Nf7 Qe7 Nxh8 d5
C40 Greco Variation, Latvian e4 e5 Nf3 f5 Nxe5 Qe7
C40 Mail Line, Latvian Gambit Accepted e4 e5 Nf3 f5 Nxe5 Qf6 d4
C40 Bilguer Variation, Latvian e4 e5 Nf3 f5 Nxe5 Qf6 d4 d6 Nc4
C40 Bronstein Attack, Latvian e4 e5 Nf3 f5 Nxe5 Qf6 d4 d6 Nc4 fxe4 Be2
C40 Nimzovich Attack, Latvian e4 e5 Nf3 f5 Nxe5 Qf6 d4 d6 Nc4 fxe4 Ne3
C40 Bronstein Gambit, Latvian e4 e5 Nf3 f5 Nxe5 Qf6 d4 d6 Nc4 fxe4 Qh5+ g6 Qe2
C40 Foltys-Leonhardt Variation, Latvian Gambit e4 e5 Nf3 f5 Nxe5 Qf6 Nc4
C40 Foltys Variation, Latvian e4 e5 Nf3 f5 Nxe5 Qf6 Nc4 fxe4 d3
C40 Leonhardt Variation, Latvian e4 e5 Nf3 f5 Nxe5 Qf6 Nc4 fxe4 Nc3
C40 Damiano Defense e4 e5 Nf3 f6
C40 Damiano Gambit e4 e5 Nf3 f6 Nxe5 fxe5 Qh5+ g6 Qxe5+ Qe7 Qxh8
C40 Chigorin Gambit, Damiano e4 e5 Nf3 f6 Nxe5 Qe7 Nf3 d5
C44 C44 e4 e5 Nf3 Nc6
C44 Paschman Wing Gambit e4 e5 Nf3 Nc6 b4
C60 Ruy Lopez; Spanish Opening; C60 e4 e5 Nf3 Nc6 Bb5
C60 Bulgarian Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a5
C68 Morphy Defense, Ruy Lopez; C68 e4 e5 Nf3 Nc6 Bb5 a6
C70 Morphy Defense, Ruy Lopez; C70 e4 e5 Nf3 Nc6 Bb5 a6 Ba4
C70 Caro Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 b5
C70 Graz Variation, Ruy e4 e5 Nf3 Nc6 Bb5 a6 Ba4 b5 Bb3 Bc5
C70 Furman-Taimanov; Wing Var, Ruy; Norwegian Variation e4 e5 Nf3 Nc6 Bb5 a6 Ba4 b5 Bb3 Na5
C70 Nightingale Gambit, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 b5 Bb3 Na5 Bxf7+
C70 Alapin’s Defense Deferred, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Bb4
C70 Classical Defense Deferred, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Bc5
C71 Steinitz Defense Deferred; Ruy Lopez; C71 e4 e5 Nf3 Nc6 Bb5 a6 Ba4 d6
C71 Modern Steinitz Defense, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 d6
C73 C73 e4 e5 Nf3 Nc6 Bb5 a6 Ba4 d6 Bxc6+ bxc6
C73 Richter Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 d6 Bxc6+ bxc6 d4
C73 Alapin Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 d6 Bxc6+ bxc6 d4 f6
C74 C74 e4 e5 Nf3 Nc6 Bb5 a6 Ba4 d6 c3
C75 C75 e4 e5 Nf3 Nc6 Bb5 a6 Ba4 d6 c3 Bd7
C76 C76 e4 e5 Nf3 Nc6 Bb5 a6 Ba4 d6 c3 Bd7 d4 g6
C74 Siesta Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 d6 c3 f5
C74 Kopaiev Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 d6 c3 f5 exf5 Bxf5 O-O
C71 Keres Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 d6 c4
C71 Noah’s Ark Trap, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 d6 d4 b5 Bb3 exd4 Nxd4 Nxd4 Qxd4 c5 Qd5 Be6 Qc6+ Bd7
C72 C72 e4 e5 Nf3 Nc6 Bb5 a6 Ba4 d6 O-O
C70 Schliemann Defense Deferred, Ruy e4 e5 Nf3 Nc6 Bb5 a6 Ba4 f5
C70 Jaenisch Gambit Deferred, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 f5 exf5
C77 C77 e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6
C77 Treybel; Flohr; Exchange Var Deferred e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 Bxc6
C77 Bayreuth Variation, ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 Bxc6
C77 Jaffe Gambit, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 c3
C77 Anderssen Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 d3
C77 Duras Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 d3 d6 c4
C77 Mackenzie Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 d4
C77 Center Attack, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 d4 exd4
C77 Nimzovich; Tarrasch Var, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 Nc3
C78 Normal Variation, Ruy Lopez; C78 e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O
C78 Arkangelsk; Counterthrust Var, Ruy e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O b5
C78 Shannon Gambit, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O b5 Bb3 Bb7 Ng5 d5
C78 Wing Attack, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O b5 Bb3 Be7 a4
C78 Neo-Steinitz Defense, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O b5 Bb3 d6
C78 Moeller Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Bc5
C84 Closed Defense, Ruy Lopez; C84 e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7
C85 Delayed Exchange Ruy Lopez Deferred; C85 e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Bxc6
C84 Center Attack, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 d4
C84 Basque Gambit, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 d4 exd4 e5 Ne4 c3
C84 Lopez Four Knights, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Nc3
C86 Worrall Attack, Ruy Lopez; C86 e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Qe2
C86 Schlechter Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Qe2 b5 Bb3 O-O c3 d5
C86 English Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Qe2 b5 Bb3 O-O c3 d6 d4 Bg4
C87 C87 e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1
C88 C88 e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3
C88 Trajkovic Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 Bb7
C88 Pseudo-Marshall Var, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 Bb7 c3 d5 exd5 Nxd5 Nxe5 Nxe5
C90 C90 e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 d6
C90 Balla Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 d6 c3 Na5 Bc2 c5 d4 Qc7
C90 Suetin Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 d6 c3 O-O a3
C90 Lutikov Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 d6 c3 O-O Bc2
C90 Pilnik Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 d6 c3 O-O d3
C91 Yates Variation, Ruy; C91 e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 d6 c3 O-O d4
C91 Bogoljubow; Counterthrust Var, Ruy e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 d6 c3 O-O d4 Bg4
C92 C92 e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 d6 c3 O-O h3
C92 Keres Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 d6 c3 O-O h3 a5
C92 Flohr; Zaitsev; Lenzerheide Var, Ruy e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 d6 c3 O-O h3 Bb7
C92 Kholmov Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 d6 c3 O-O h3 Be6
C93 Smyslov Variation, Ruy Lopez; C93 e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 d6 c3 O-O h3 h6
C96 C96 e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 d6 c3 O-O h3 Na5
C96 Borisenko Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 d6 c3 O-O h3 Na5 Bc2 c5 d4 Nc6
C96 Keres Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 d6 c3 O-O h3 Na5 Bc2 c5 d4 Nd7
C97 Chigorin Variation, Ruy Lopez; C97 e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 d6 c3 O-O h3 Na5 Bc2 c5 d4 Qc7
C92 Spanish Benoni, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 d6 c3 O-O h3 Na5 Bc2 c5 d4 Qc7 1d5
C97 Classical Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 d6 c3 O-O h3 Na5 Bc2 c5 d4 Qc7 1Nbd2
C99 C99 e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 d6 c3 O-O h3 Na5 Bc2 c5 d4 Qc7 1Nbd2 cxd4
C98 C98 e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 d6 c3 O-O h3 Na5 Bc2 c5 d4 Qc7 1Nbd2 Nc6
C98 Rauzer Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 d6 c3 O-O h3 Na5 Bc2 c5 d4 Qc7 1Nbd2 Nc6 1dxe5 dxe5 1a4
C94 Breyer; Retreat Variation, Ruy Lopez; C94 e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 d6 c3 O-O h3 Nb8
C95 C95 e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 d6 c3 O-O h3 Nb8 d4
C95 Borisenko Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 d6 c3 O-O h3 Nb8 d4 Nbd7
C95 Arseniev Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 d6 c3 O-O h3 Nb8 d4 Nbd7 c4
C95 Romanishin Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 d6 c3 O-O h3 Nb8 d4 Nbd7 Nbd2 Bb7 1Bc2 Re8 1Nf1 Bf8 1Bg5
C95 Simagin Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 d6 c3 O-O h3 Nb8 d4 Nbd7 Nh4
C92 Keres Defense, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 d6 c3 O-O h3 Nd7
C92 Zaitsev System, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 d6 c3 O-O h3 Re8
C88 Rosen Attack, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 d6 d4
C88 Anti-Marshall Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 O-O a4
C89 C89 e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 O-O c3
C89 Marshall Attack, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 O-O c3 d5
C89 Marshall Counter-Attack, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 O-O c3 d5 d4
C89 Steiner Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 O-O c3 d5 exd5 e4
C89 Kevitz Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 O-O c3 d5 exd5 Nxd5 Nxe5 Nxe5 Rxe5 c6 1Bxd5 cxd5 1d4 Bd6 1Re3
C89 Geller Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 O-O c3 d5 exd5 Nxd5 Nxe5 Nxe5 Rxe5 c6 1d4 Bd6 1Re1 Qh4 1g3 Qh3
C89 Fischer Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 O-O c3 d5 exd5 Nxd5 Nxe5 Nxe5 Rxe5 c6 1g3
C90 Suetin Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 O-O c3 d6 a3
C90 Lutikov Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 O-O c3 d6 Bd2
C90 Leonhardt Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 b5 Bb3 O-O c3 Na5 Bc2 c5 d4 Qc7 h3 Nc6 1d5 Nd8 1Nbd2 g5
C87 Averbakh Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 d6
C87 Kecskemet; Timbuktu Var, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 d6 c3 O-O d4 Bd7 Nbd2 Be8
C87 Romanovsky Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Be7 Re1 d6 c3 O-O d4 Bd7 Nbd2 exd4 cxd4 Nb4
C79 Central Countergambit, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O d5
C79 Russian Defense, Ruy Lopez; C79; Lasker Defense e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O d6
C79 Brix Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O g6
C80 Tarrasch; Open Variation, Ruy Lopez; C80 e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Nxe4
C80 Schlechter Defense, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Nxe4 d4 b5 Bb3 d5 a4 Nxd4
C80 Berger Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Nxe4 d4 b5 Bb3 d5 a4 Nxd4 Nxd4 exd4 Nc3
C80 Harksen Gambit, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Nxe4 d4 b5 Bb3 d5 c4
C83 Malkin Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Nxe4 d4 b5 Bb3 d5 dxe5
C81 Keres; Estonian; Howell; Moscow Var e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Nxe4 d4 b5 Bb3 d5 dxe5 Be6
C82 C82 e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Nxe4 d4 b5 Bb3 d5 dxe5 Be6 c3
C82 Italian Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Nxe4 d4 b5 Bb3 d5 dxe5 Be6 c3 Bc5
C82 St Petersburg Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Nxe4 d4 b5 Bb3 d5 dxe5 Be6 c3 Bc5 Nbd2
C82 Dilworth; Kleczynski Var, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Nxe4 d4 b5 Bb3 d5 dxe5 Be6 c3 Bc5 Nbd2 O-O Bc2
C82 Motzko Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Nxe4 d4 b5 Bb3 d5 dxe5 Be6 c3 Bc5 Qd3
C82 Nenarokov Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Nxe4 d4 b5 Bb3 d5 dxe5 Be6 c3 Bc5 Qd3 Ne7
C83 C83 e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Nxe4 d4 b5 Bb3 d5 dxe5 Be6 c3 Be7
C83 Breslau Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Nxe4 d4 b5 Bb3 d5 dxe5 Be6 c3 Be7 Re1 O-O Nd4
C82 Berlin Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Nxe4 d4 b5 Bb3 d5 dxe5 Be6 c3 Nc5
C80 Bernstein Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Nxe4 d4 b5 Bb3 d5 dxe5 Be6 Nbd2
C80 Karpov Gambit, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Nxe4 d4 b5 Bb3 d5 dxe5 Be6 Nbd2 Nc5 c3 d4
C81 Howell Attack, Ruy Lopez; C81 e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Nxe4 d4 b5 Bb3 d5 dxe5 Be6 Qe2
C81 Adam Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Nxe4 d4 b5 Bb3 d5 dxe5 Be6 Qe2 Be7 c4
C81 Ekstrom Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Nxe4 d4 b5 Bb3 d5 dxe5 Be6 Qe2 Be7 Rd1 O-O c4
C80 Zukertort Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Nxe4 d4 b5 Bb3 d5 dxe5 Ne7
C80 Richter Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Nxe4 d4 b5 d5
C80 Friess Attack, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Nxe4 d4 b5 Nxe5
C80 Riga Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Nxe4 d4 exd4
C80 Knoore Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Nxe4 Nc3
C80 Tartakower Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Nxe4 Qe2
C80 Skipworth Gambit, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 O-O Nxe4 Re1 d5
C77 Wormald Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nf6 Qe2
C70 Cozio Defense Deferred, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Ba4 Nge7
C68 Exchange Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Bxc6
C68 Lutikov Variation, Ruy Lopez Exchange e4 e5 Nf3 Nc6 Bb5 a6 Bxc6 bxc6
C68 Keres Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Bxc6 bxc6 Nc3
C68 Romanovsky Variation, Ruy Lopez Exchange e4 e5 Nf3 Nc6 Bb5 a6 Bxc6 bxc6 Nc3 f6 d3
C68 Alekhjne Variation, Ruy Lopez Exchange e4 e5 Nf3 Nc6 Bb5 a6 Bxc6 dxc6 d4 exd4 Qxd4 Qxd4 Nxd4 Bd6
C68 Barendregt-Fischer Var, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Bxc6 dxc6 O-O
C68 King’s Bishop Variation, Ruy Lopez Exchange e4 e5 Nf3 Nc6 Bb5 a6 Bxc6 dxc6 O-O Bd6
C68 Alapin Gambit, Ruy Lopez Exchange e4 e5 Nf3 Nc6 Bb5 a6 Bxc6 dxc6 O-O Bg4 h3 h5
C69 Gligoric Variation, Ruy Lopez; C69 e4 e5 Nf3 Nc6 Bb5 a6 Bxc6 dxc6 O-O f6
C69 Bronstein Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 a6 Bxc6 dxc6 O-O Qd6
C60 Rotary-Albany Gambit, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 b6
C60 Alapin Defense, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 Bb4
C60 Alapin Gambit, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 Bb4 c3 Ba5 Bxc6 dxc6
C64 Classical; Cordel Var, Ruy Lopez; C64 e4 e5 Nf3 Nc6 Bb5 Bc5
C64 Spanish Wing Gambit, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 Bc5 b4
C64 Charousek Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 Bc5 c3 Bb6
C64 Konikowski Gambit, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 Bc5 c3 d5
C64 Cordel Gambit, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 Bc5 c3 f5
C64 Benelux Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 Bc5 c3 Nf6 d4 Bb6 O-O O-O
C64 Boden Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 Bc5 c3 Qe7
C64 Zaitsev Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 Bc5 O-O Nd4 b4
C64 Zukertort Gambit, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 Bc5 O-O Nf6 c3
C60 Lucena Defense, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 Be7
C60 Sawyer’s Gambit, Ruy Lopez; Spanish Countergambit e4 e5 Nf3 Nc6 Bb5 d5
C60 Harding Gambit, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 d5 Nxe5 Qg5 Nxc6
C60 Fricke Gambit, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 d5 Nxe5 Qg5 O-O
C62 Steinitz Defense, Ruy Lopez; C62 e4 e5 Nf3 Nc6 Bb5 d6
C62 Nimzovich Attack, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 d6 d4 Bd7 Nc3 Nf6 Bxc6
C62 Center Gambit, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 d6 d4 exd4 O-O
C63 Schliemann; Jaenisch Var, Ruy Lopez; C63 e4 e5 Nf3 Nc6 Bb5 f5
C63 Exchange Variation, Schliemann Ruy Lopez e4 e5 Nf3 Nc6 Bb5 f5 Bxc6
C63 Schoenemann Attack, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 f5 d4
C63 Jaenisch Gambit Accepted, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 f5 exf5
C63 Berger (Dyckhoff) Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 f5 Nc3
C63 Kostic Defense, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 f5 Nc3 fxe4 Nxe4 Be7
C63 Moehring Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 f5 Nc3 fxe4 Nxe4 d5 Nxe5 dxe4 Nxc6 Qd5
C63 Tartakower Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 f5 Nc3 fxe4 Nxe4 Nf6
C63 Soviet Youth Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 f5 Nc3 Nd4 O-O
C63 Kostic Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 f5 Nc3 Nf6 exf5 Bc5
C60 Nuremberg Defense, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 f6
C60 Brentano Defense, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 g5
C60 Barnes; Smyslov; Fianchetto Var, Ruy e4 e5 Nf3 Nc6 Bb5 g6
C60 Retreat Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 Nc8
C61 Bird Defense, Ruy Lopez; C61 e4 e5 Nf3 Nc6 Bb5 Nd4
C61 Paulsen Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 Nd4 Nxd4 exd4 O-O Ne7
C65 Berlin Defense, Ruy Lopez; C65 e4 e5 Nf3 Nc6 Bb5 Nf6
C65 Kaufmann Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 Nf6 d3 Bc5 Be3
C65 Anderssen Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 Nf6 d3 d6 Bxc6+
C65 Duras Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 Nf6 d3 d6 c4
C65 Mortimer Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 Nf6 d3 Ne7
C65 Mortimer Trap, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 Nf6 d3 Ne7 Nxe5 c6
C65 Nyholm Attack, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 Nf6 d4 exd4 O-O
C65 Beverwijk Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 Nf6 O-O Bc5
C66 Improved Steinitz Defense, Ruy Lopez; C66 e4 e5 Nf3 Nc6 Bb5 Nf6 O-O d6
C66 Hedgehog Defense, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 Nf6 O-O d6 d4 Bd7 Nc3 Be7
C66 Closed Bernstein Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 Nf6 O-O d6 d4 Bd7 Nc3 Be7 Bg5
C66 Closed Showalter Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 Nf6 O-O d6 d4 Bd7 Nc3 Be7 Bxc6
C66 Tarrasch Trap, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 Nf6 O-O d6 d4 Bd7 Nc3 Be7 Re1 O-O
C66 Closed Wolf Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 Nf6 O-O d6 d4 Bd7 Nc3 exd4
C66 Fishing Pole Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 Nf6 O-O Ng4
C67 Rio Gambit Accepted, Ruy Lopez; C67 e4 e5 Nf3 Nc6 Bb5 Nf6 O-O Nxe4
C67 Rosenthal Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 Nf6 O-O Nxe4 d4 a6
C67 Rio de Janeiro Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 Nf6 O-O Nxe4 d4 Be7
C67 Minckwitz Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 Nf6 O-O Nxe4 d4 Be7 dxe5
C67 Trifunovic Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 Nf6 O-O Nxe4 d4 Be7 Qe2 d5
C67 Pillsbury Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 Nf6 O-O Nxe4 d4 Be7 Qe2 Nd6 Bxc6+ bxc6 dxe5 Nb7 b3
C67 Zukertort Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 Nf6 O-O Nxe4 d4 Be7 Qe2 Nd6 Bxc6+ bxc6 dxe5 Nb7 c4
C67 Berlin; Rio de Janerio Var, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 Nf6 O-O Nxe4 d4 Be7 Qe2 Nd6 Bxc6+ bxc6 dxe5 Nb7 Nc3 O-O Re1
C67 Winawer Attack, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 Nf6 O-O Nxe4 d4 Be7 Qe2 Nd6 Bxc6+ bxc6 dxe5 Nb7 Nd4 O-O
C67 Cordel Defense, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 Nf6 O-O Nxe4 d4 Be7 Qe2 Nd6 Bxc6+ bxc6 dxe5 Nf5
C67 L’Hermet Variation, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 Nf6 O-O Nxe4 d4 Nd6
C67 Westerinen Line, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 Nf6 O-O Nxe4 d4 Nd6 Bxc6 dxc6 dxe5 Ne4
C60 Cozio Defense, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 Nge7
C60 Tartakower Gambit, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 Nge7 d4 exd4 Nxd4 g6 Nc3 Bg7 Be3 O-O Qd2 d5
C60 Paulsen Variation, Cozio Defense, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 Nge7 Nc3 g6
C60 Vinogradov Var, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 Qe7
C60 Frankfort; Gunderam Var, Ruy Lopez e4 e5 Nf3 Nc6 Bb5 Qf6
C50 Italian Game; C50 e4 e5 Nf3 Nc6 Bc4
C50 Giuoco Piano; Italian Opening e4 e5 Nf3 Nc6 Bc4 Bc5
C51 Evans Gambit; C51 e4 e5 Nf3 Nc6 Bc4 Bc5 b4
C51 Lange Variation, Evans Gambit e4 e5 Nf3 Nc6 Bc4 Bc5 b4 Bb6 b5 Na5 Nxe5 Nh6
C51 Evans Gambit Accepted e4 e5 Nf3 Nc6 Bc4 Bc5 b4 Bxb4
C52 Main Line, Evans Gambit; C52 e4 e5 Nf3 Nc6 Bc4 Bc5 b4 Bxb4 c3 Ba5
C52 Leonhardt Variation, Evans e4 e5 Nf3 Nc6 Bc4 Bc5 b4 Bxb4 c3 Ba5 d4 b5
C52 Sokolsky Variation, Evans e4 e5 Nf3 Nc6 Bc4 Bc5 b4 Bxb4 c3 Ba5 d4 d6 Bg5
C52 Lasker Defense, Evans e4 e5 Nf3 Nc6 Bc4 Bc5 b4 Bxb4 c3 Ba5 d4 d6 O-O Bb6
C52 Tartakower Attack, Evans e4 e5 Nf3 Nc6 Bc4 Bc5 b4 Bxb4 c3 Ba5 d4 d6 Qb3
C52 Pierce Defense, Evans e4 e5 Nf3 Nc6 Bc4 Bc5 b4 Bxb4 c3 Ba5 d4 exd4
C52 Schulen Defense, Evans e4 e5 Nf3 Nc6 Bc4 Bc5 b4 Bxb4 c3 Ba5 d4 exd4 O-O b5
C52 Waller Attack, Evans e4 e5 Nf3 Nc6 Bc4 Bc5 b4 Bxb4 c3 Ba5 d4 exd4 O-O d6 Qb3
C52 Compromised Defense, Evans e4 e5 Nf3 Nc6 Bc4 Bc5 b4 Bxb4 c3 Ba5 d4 exd4 O-O dxc3
C52 Mieses Defense, Evans e4 e5 Nf3 Nc6 Bc4 Bc5 b4 Bxb4 c3 Ba5 d4 exd4 O-O Nge7
C52 Slow Variation, Evans e4 e5 Nf3 Nc6 Bc4 Bc5 b4 Bxb4 c3 Ba5 O-O
C52 Richardson Attack, Evans e4 e5 Nf3 Nc6 Bc4 Bc5 b4 Bxb4 c3 Ba5 O-O Nf6 d4 O-O Nxe5
C51 Normal Position, Evans Gambit e4 e5 Nf3 Nc6 Bc4 Bc5 b4 Bxb4 c3 Bc5 d4 exd4 O-O d6 cxd4 Bb6
C51 Ulvestad Variation, Evans e4 e5 Nf3 Nc6 Bc4 Bc5 b4 Bxb4 c3 Bc5 d4 exd4 O-O d6 cxd4 Bb6 d5 Na5 Bb2
C51 Paulsen Variation, Evans e4 e5 Nf3 Nc6 Bc4 Bc5 b4 Bxb4 c3 Bc5 d4 exd4 O-O d6 cxd4 Bb6 d5 Na5 Bb2 Ne7
C51 Morphy Attack, Evans e4 e5 Nf3 Nc6 Bc4 Bc5 b4 Bxb4 c3 Bc5 d4 exd4 O-O d6 cxd4 Bb6 Nc3
C51 Fraser Attack; Mortimer, Evans e4 e5 Nf3 Nc6 Bc4 Bc5 b4 Bxb4 c3 Bc5 d4 exd4 O-O d6 cxd4 Bb6 Nc3 Bg4 Qa4
C51 Goering Attack, Evans e4 e5 Nf3 Nc6 Bc4 Bc5 b4 Bxb4 c3 Bc5 d4 exd4 O-O d6 cxd4 Bb6 Nc3 Na5 Bg5
C51 Stone-Ware Defense, Evans Gambit e4 e5 Nf3 Nc6 Bc4 Bc5 b4 Bxb4 c3 Bd6
C51 Anderssen Variation, Evans e4 e5 Nf3 Nc6 Bc4 Bc5 b4 Bxb4 c3 Be7
C51 Cordel Line, Evans e4 e5 Nf3 Nc6 Bc4 Bc5 b4 Bxb4 c3 Be7 d4 Na5
C51 Hein Countergambit, Evans e4 e5 Nf3 Nc6 Bc4 Bc5 b4 d5
C50 Jerome Gambit; Kentucky Opening e4 e5 Nf3 Nc6 Bc4 Bc5 Bxf7+
C53 Classical Variation, Italian; C53 e4 e5 Nf3 Nc6 Bc4 Bc5 c3
C53 Labourdonnais Variation, Italian e4 e5 Nf3 Nc6 Bc4 Bc5 c3 d6 d4 exd4 cxd4 Bb6
C53 Alexandre Gambit, Italian e4 e5 Nf3 Nc6 Bc4 Bc5 c3 f5
C54 C54 e4 e5 Nf3 Nc6 Bc4 Bc5 c3 Nf6
C54 Bird Attack, Italian e4 e5 Nf3 Nc6 Bc4 Bc5 c3 Nf6 b4
C53 Giuoco Pianissimo e4 e5 Nf3 Nc6 Bc4 Bc5 c3 Nf6 d3
C53 Center Attack, Italian e4 e5 Nf3 Nc6 Bc4 Bc5 c3 Nf6 d4
C53 Grevo Gambit, Italian e4 e5 Nf3 Nc6 Bc4 Bc5 c3 Nf6 d4 exd4 cxd4
C54 Cracow Variation, Italian e4 e5 Nf3 Nc6 Bc4 Bc5 c3 Nf6 d4 exd4 cxd4 Bb4+ Kf1
C54 Moeller (Therkatz) Attack, Italian e4 e5 Nf3 Nc6 Bc4 Bc5 c3 Nf6 d4 exd4 cxd4 Bb4+ Nc3 Nxe4 O-O Bxc3 d5
C54 Therkatz-Herzog, Italian e4 e5 Nf3 Nc6 Bc4 Bc5 c3 Nf6 d4 exd4 cxd4 Bb4+ Nc3 Nxe4 O-O Bxc3 d5 Bf6 Re1 Ne7
C54 Greco Variation, Italian e4 e5 Nf3 Nc6 Bc4 Bc5 c3 Nf6 d4 exd4 cxd4 Bb4+ Nc3 Nxe4 O-O Nxc3
C54 Mason Gambit, Italian e4 e5 Nf3 Nc6 Bc4 Bc5 c3 Nf6 d4 exd4 O-O
C53 Albin Gambit, Italian e4 e5 Nf3 Nc6 Bc4 Bc5 c3 Nf6 O-O
C53 Lewis Defense, Italian; Closed Variation e4 e5 Nf3 Nc6 Bc4 Bc5 c3 Qe7
C53 Center Holding Variation, Italian e4 e5 Nf3 Nc6 Bc4 Bc5 c3 Qe7 d4 Bb6
C53 Mestel Variation, Italian e4 e5 Nf3 Nc6 Bc4 Bc5 c3 Qe7 d4 Bb6 Bg5
C50 Giuoco Pianissimo e4 e5 Nf3 Nc6 Bc4 Bc5 d3
C50 Lucchini Gambit; Italian e4 e5 Nf3 Nc6 Bc4 Bc5 d3 f5
C50 Italian Four Knights Variation e4 e5 Nf3 Nc6 Bc4 Bc5 d3 Nf6 Nc3
C50 Canal Variation, Italian e4 e5 Nf3 Nc6 Bc4 Bc5 d3 Nf6 Nc3 d6 Bg5
C50 Rosentreter Gambit, Italian e4 e5 Nf3 Nc6 Bc4 Bc5 d4
C50 Italian Variation, Four Knights Game e4 e5 Nf3 Nc6 Bc4 Bc5 Nc3 Nf6
C50 Deutz Gambit, Italian e4 e5 Nf3 Nc6 Bc4 Bc5 O-O Nf6 d4
C50 Hungarian Defense e4 e5 Nf3 Nc6 Bc4 Be7
C50 Tartakower Variation, Hungarian e4 e5 Nf3 Nc6 Bc4 Be7 d4 exd4 c3 Nf6 e4 Ne4
C50 Half Giuoco Piano; Semi-Italian Opening e4 e5 Nf3 Nc6 Bc4 d6
C50 Rousseau Gambit e4 e5 Nf3 Nc6 Bc4 f5
C50 Shilling (Kostic) Gambit, Italian e4 e5 Nf3 Nc6 Bc4 Nd4
C55 Two Knights Defense; C55 e4 e5 Nf3 Nc6 Bc4 Nf6
C55 De Riviere Gambit e4 e5 Nf3 Nc6 Bc4 Nf6 c3
C55 Modern Bishop’s Opening e4 e5 Nf3 Nc6 Bc4 Nf6 d3
C56 Open Variation, Two Knights Defense; C56 e4 e5 Nf3 Nc6 Bc4 Nf6 d4
C56 Perreux Variation, Two Knights Defense e4 e5 Nf3 Nc6 Bc4 Nf6 d4 exd4 Ng5
C56 Scotch Gambit e4 e5 Nf3 Nc6 Bc4 Nf6 d4 exd4 O-O
C56 Max Lange Attack e4 e5 Nf3 Nc6 Bc4 Nf6 d4 exd4 O-O Bc5 e5
C56 Loman Defense, 2 Knights e4 e5 Nf3 Nc6 Bc4 Nf6 d4 exd4 O-O Bc5 e5 d5 exf6 dxc4 Re1+ Be6 Ng5 g6
C56 Marshall Variation, 2 Knights e4 e5 Nf3 Nc6 Bc4 Nf6 d4 exd4 O-O Bc5 e5 d5 exf6 dxc4 Re1+ Be7 Ng5 Qd5 Nc3 Qf5
C56 Double Gambit Accepted, Two Knights e4 e5 Nf3 Nc6 Bc4 Nf6 d4 exd4 O-O Nxe4
C56 Nachmanson Gambit, 2 Knights e4 e5 Nf3 Nc6 Bc4 Nf6 d4 exd4 O-O Nxe4 Nc3
C56 Jordansky Attack, 2 Knights e4 e5 Nf3 Nc6 Bc4 Nf6 d4 exd4 O-O Nxe4 Re1 d5 Bxd5 Qxd5 Nc3 Qa5 Ne4 Be6 Bg5
C57 Prussian Game; Knight Attack, Two Knights; C57 e4 e5 Nf3 Nc6 Bc4 Nf6 Ng5
C57 Traxler; Wilkes-Barre Var, 2 Knights e4 e5 Nf3 Nc6 Bc4 Nf6 Ng5 Bc5
C57 Trencianske-Teplice Gambit, Two Knights e4 e5 Nf3 Nc6 Bc4 Nf6 Ng5 Bc5 Bxf7+ Ke7 d4
C57 Ulvestad Variation, 2 Knights e4 e5 Nf3 Nc6 Bc4 Nf6 Ng5 d5 exd5 b5
C57 Kurkin Gambit, Two Knights e4 e5 Nf3 Nc6 Bc4 Nf6 Ng5 d5 exd5 b5 Bf1 h6 Nxf7
C58 Polerio Defense, Two Knights; C58 e4 e5 Nf3 Nc6 Bc4 Nf6 Ng5 d5 exd5 Na5
C59 C59 e4 e5 Nf3 Nc6 Bc4 Nf6 Ng5 d5 exd5 Na5 Bb5+ c6 dxc6 bxc6 Be2
C59 Suhle Defense, Two Knights e4 e5 Nf3 Nc6 Bc4 Nf6 Ng5 d5 exd5 Na5 Bb5+ c6 dxc6 bxc6 Be2 h6
C59 Goering Variation, Two Knights e4 e5 Nf3 Nc6 Bc4 Nf6 Ng5 d5 exd5 Na5 Bb5+ c6 dxc6 bxc6 Be2 h6 Nf3 e4 Ne5
C58 Bogoljubow Variation, Two Knights e4 e5 Nf3 Nc6 Bc4 Nf6 Ng5 d5 exd5 Na5 Bb5+ c6 dxc6 bxc6 Qf3
C58 Colman Variation, 2 Knights e4 e5 Nf3 Nc6 Bc4 Nf6 Ng5 d5 exd5 Na5 Bb5+ c6 dxc6 bxc6 Qf3 Rb8
C58 Kieseritzky; Morphy Var, 2 Knights e4 e5 Nf3 Nc6 Bc4 Nf6 Ng5 d5 exd5 Na5 d3
C58 Yankovich Variation, Two Knights e4 e5 Nf3 Nc6 Bc4 Nf6 Ng5 d5 exd5 Na5 d3 h6 Nf3 e4 Qe2 Nxc4 dxc4 Bc5 Nfd2
C57 Kloss Gambit, Two Knights e4 e5 Nf3 Nc6 Bc4 Nf6 Ng5 d5 exd5 Nb4
C57 Fritz Variation, 2 Knights e4 e5 Nf3 Nc6 Bc4 Nf6 Ng5 d5 exd5 Nd4
C57 Berliner Variation, 2 Knights e4 e5 Nf3 Nc6 Bc4 Nf6 Ng5 d5 exd5 Nd4 c3 b5 Bf1 Nxd5 Ne4 Qh4
C57 Lolli Attack, 2 Knights e4 e5 Nf3 Nc6 Bc4 Nf6 Ng5 d5 exd5 Nxd5 d4
C57 Fried Liver; Fegatello Attack, 2 Knights e4 e5 Nf3 Nc6 Bc4 Nf6 Ng5 d5 exd5 Nxd5 Nxf7
C57 Ponziani-Steintz Gambit, Two Knights e4 e5 Nf3 Nc6 Bc4 Nf6 Ng5 Nxe4
C44 Taylor Opening; Inverted Hungarian e4 e5 Nf3 Nc6 Be2
C44 Inverted Hanham Opening e4 e5 Nf3 Nc6 Be2 Nf6 d3 d5 Nbd2
C44 Basman Gambit e4 e5 Nf3 Nc6 Be2 Nf6 d4 exd4 e5
C44 Ponziani; Staunton; English Knights e4 e5 Nf3 Nc6 c3
C44 Spanish Variation, Ponziani e4 e5 Nf3 Nc6 c3 d5 Bb5
C44 Nikitin Gambit, Ponziani e4 e5 Nf3 Nc6 c3 d5 Bb5 dxe4 Nxe5 Qd5 Qa4
C44 Caro Variation, Ponziani e4 e5 Nf3 Nc6 c3 d5 Qa4 Bd7
C44 Steinitz Variation, Ponziani e4 e5 Nf3 Nc6 c3 d5 Qa4 f6
C44 Leonhardt Variation, Ponziani e4 e5 Nf3 Nc6 c3 d5 Qa4 Nf6
C44 Ponziani Counter-Gambit e4 e5 Nf3 Nc6 c3 f5
C44 Schmidt Attack, Ponziani e4 e5 Nf3 Nc6 c3 f5 d4 d6 d5
C44 Jaenisch Counterattack, Ponziani e4 e5 Nf3 Nc6 c3 Nf6
C44 Neumann Gambit, Ponziani e4 e5 Nf3 Nc6 c3 Nf6 Bc4
C44 Breyer Opening, Ponziani e4 e5 Nf3 Nc6 c3 Nf6 d3 Be7 b4
C44 Vukovic Gambit, Ponziani e4 e5 Nf3 Nc6 c3 Nf6 d4 Nxe4 d5 Bc5
C44 Dresden Opening e4 e5 Nf3 Nc6 c4
C44 Scotch Game e4 e5 Nf3 Nc6 d4
C44 MacLopez; Relfsson Gambit, Scotch e4 e5 Nf3 Nc6 d4 exd4 Bb5
C44 Scotch Gambit e4 e5 Nf3 Nc6 d4 exd4 Bc4
C44 London Defense, Scotch e4 e5 Nf3 Nc6 d4 exd4 Bc4 Bb4+
C44 Vitzhum Attack, Scotch e4 e5 Nf3 Nc6 d4 exd4 Bc4 Bc5 Ng5 Nh6 Qh5
C44 Paulsen; Anderssen C-A, Scotch e4 e5 Nf3 Nc6 d4 exd4 Bc4 Bc5 O-O d6 c3 Bg4
C44 Benima Defense, Scotch e4 e5 Nf3 Nc6 d4 exd4 Bc4 Be7
C44 Goering Gambit, Scotch e4 e5 Nf3 Nc6 d4 exd4 c3
C44 Goering Gambit Declined, Scotch e4 e5 Nf3 Nc6 d4 exd4 c3 d5
C44 Double Pawn Sacrifice, Goering Gambit e4 e5 Nf3 Nc6 d4 exd4 c3 dxc3 Bc4
C44 Bardeleben Variation, Scotch e4 e5 Nf3 Nc6 d4 exd4 c3 dxc3 Nxc3 Bb4 Bc4 Nf6
C45 C45 e4 e5 Nf3 Nc6 d4 exd4 Nxd4
C45 Malaniuk Variation, Scotch e4 e5 Nf3 Nc6 d4 exd4 Nxd4 Bb4+
C45 Classical Variation, Scotch e4 e5 Nf3 Nc6 d4 exd4 Nxd4 Bc5
C45` Paulsen Attack, Scotch e4 e5 Nf3 Nc6 d4 exd4 Nxd4 Bc5 Be3 Qf6 c3 Nge7 Bb5
C45 Gunsberg Defense, Scotch e4 e5 Nf3 Nc6 d4 exd4 Nxd4 Bc5 Be3 Qf6 c3 Nge7 Bb5 Nd8
C45 Fleissig; Meitner Variation, Scotch e4 e5 Nf3 Nc6 d4 exd4 Nxd4 Bc5 Be3 Qf6 c3 Nge7 Nc2
C45 Blackburne Attack, Scotch e4 e5 Nf3 Nc6 d4 exd4 Nxd4 Bc5 Be3 Qf6 c3 Nge7 Qd2
C45 Millennium Variation, Scotch e4 e5 Nf3 Nc6 d4 exd4 Nxd4 Bc5 Be3 Qf6 c3 Qg6
C45 Blumenfeld Variation, Scotch e4 e5 Nf3 Nc6 d4 exd4 Nxd4 Bc5 Be3 Qf6 Nb5
C45 Potter Variation, Scotch e4 e5 Nf3 Nc6 d4 exd4 Nxd4 Bc5 Nb3
C45 Romanishin Variation, Scotch e4 e5 Nf3 Nc6 d4 exd4 Nxd4 Bc5 Nb3 Bb4+
C45 Geller Variation, Scotch e4 e5 Nf3 Nc6 d4 exd4 Nxd4 Bc5 Nb3 Bb6 a4 a6 Nc3 Nf6
C45 Intermezzo Variation, Scotch e4 e5 Nf3 Nc6 d4 exd4 Nxd4 Bc5 Nxc6 Qf6
C45 Alekhine Gambit, Scotch e4 e5 Nf3 Nc6 d4 exd4 Nxd4 Nf6 e5
C45 Schmidt Var; Scotch Four Knights e4 e5 Nf3 Nc6 d4 exd4 Nxd4 Nf6 Nc3
C45 Mieses Variation, Scotch e4 e5 Nf3 Nc6 d4 exd4 Nxd4 Nf6 Nxc6
C45 Tartakower Variation, Scotch e4 e5 Nf3 Nc6 d4 exd4 Nxd4 Nf6 Nxc6 bxc6 Nd2
C45 Steinitz; Pulling Variation, Scotch e4 e5 Nf3 Nc6 d4 exd4 Nxd4 Qh4
C45 Braune Variation, Scotch e4 e5 Nf3 Nc6 d4 exd4 Nxd4 Qh4 Be3
C45 Horwitz Attack, Scotch e4 e5 Nf3 Nc6 d4 exd4 Nxd4 Qh4 Nb5
C45 Steinitz Variation, Scotch e4 e5 Nf3 Nc6 d4 exd4 Nxd4 Qh4 Nc3
C45 Modern Defesne, Scotch e4 e5 Nf3 Nc6 d4 exd4 Nxd4 Qh4 Nc3 Bb4
C45 Fraser Attack, Scotch e4 e5 Nf3 Nc6 d4 exd4 Nxd4 Qh4 Nf3
C45 Paulsen Variation, Scotch e4 e5 Nf3 Nc6 d4 exd4 Nxd4 Qh4 Nf5
C44 Lolli Attack, Scotch e4 e5 Nf3 Nc6 d4 Nxd4
C44 Napoleon Gambit, Scotch e4 e5 Nf3 Nc6 d4 Nxd4 Nxd4 exd4 Bc4
C44 Konstantinopolsky Opening e4 e5 Nf3 Nc6 g3
C46 Three Knights Opening; C46 e4 e5 Nf3 Nc6 Nc3
C46 Schlechter Variation, Three Knights e4 e5 Nf3 Nc6 Nc3 Bb4 Nd5 Nf6
C46 Winawer Defense, Three Knights e4 e5 Nf3 Nc6 Nc3 f5
C46 Steinitz Defense, Three Knights e4 e5 Nf3 Nc6 Nc3 g6
C46 Rosenthal Variation, Three Knights e4 e5 Nf3 Nc6 Nc3 g6 d4 exd4 Nd5
C47 Four Knights Openng; C47 e4 e5 Nf3 Nc6 Nc3 Nf6
C47 Gunsberg Variation, Four Kngiths e4 e5 Nf3 Nc6 Nc3 Nf6 a3
C47 Provincial Opening, 4 Knights e4 e5 Nf3 Nc6 Nc3 Nf6 a3 d6 h3
C48 Spanish Four Knights Game; C48 e4 e5 Nf3 Nc6 Nc3 Nf6 Bb5
C48 Ranken Variation, 4 Knights e4 e5 Nf3 Nc6 Nc3 Nf6 Bb5 a6 Bxc6
C49 Double Ruy Lopez Opening, 4 Knights; C49 e4 e5 Nf3 Nc6 Nc3 Nf6 Bb5 Bb4
C49 Paulsen Variation, 4 Knights e4 e5 Nf3 Nc6 Nc3 Nf6 Bb5 Bb4 O-O O-O Bxc6
C49 Svenonius Variation, 4 Knights e4 e5 Nf3 Nc6 Nc3 Nf6 Bb5 Bb4 O-O O-O d3 Bxc3 bxc3 d5
C49 Janowski Variation, Four Knights e4 e5 Nf3 Nc6 Nc3 Nf6 Bb5 Bb4 O-O O-O d3 Bxc3 bxc3 d6 Re1
C49 Symmetrical Variation, 4 Knights e4 e5 Nf3 Nc6 Nc3 Nf6 Bb5 Bb4 O-O O-O d3 d6
C49 Bernstein Variation, 4 Knights e4 e5 Nf3 Nc6 Nc3 Nf6 Bb5 Bb4 O-O O-O d3 d6 Bg5 Bxc3 bxc3 Ne7
C49 Metger Unpin Variation, 4 Knights e4 e5 Nf3 Nc6 Nc3 Nf6 Bb5 Bb4 O-O O-O d3 d6 Bg5 Bxc3 bxc3 Qe7 Re1 Nd8
C49 Pillsbury Variation, 4 Knights e4 e5 Nf3 Nc6 Nc3 Nf6 Bb5 Bb4 O-O O-O d3 d6 Bg5 Ne7
C49 Maroczy Variation, 4 Knights e4 e5 Nf3 Nc6 Nc3 Nf6 Bb5 Bb4 O-O O-O d3 d6 Ne2
C49 Blackburne Attack, 4 Knights e4 e5 Nf3 Nc6 Nc3 Nf6 Bb5 Bb4 O-O O-O Nd5 Bc5 d4
C48 Classical Variation, Four Knights e4 e5 Nf3 Nc6 Nc3 Nf6 Bb5 Bc5
C48 Marshall Gambit, Four Knights e4 e5 Nf3 Nc6 Nc3 Nf6 Bb5 Bc5 Nxe5 Nd4 Ba4 O-O
C48 Rubinstein Variation, 4 Knights e4 e5 Nf3 Nc6 Nc3 Nf6 Bb5 Nd4
C46 Italian Variation, Four Knights e4 e5 Nf3 Nc6 Nc3 Nf6 Bc4
C47 Noa Gambit, Four Knights e4 e5 Nf3 Nc6 Nc3 Nf6 Bc4 Nxe4 Bxf7+
C47 Bogoljubow (Scotch) Variation, 4 Knights e4 e5 Nf3 Nc6 Nc3 Nf6 d4
C47 Oxford Gambit, Four Kngihts e4 e5 Nf3 Nc6 Nc3 Nf6 d4 Bb4 d5 Nd4
C47 Krause Gambit, Four Knights e4 e5 Nf3 Nc6 Nc3 Nf6 d4 Bb4 Nxe5
C47 Leonhardt Defense, Four Knights e4 e5 Nf3 Nc6 Nc3 Nf6 d4 Bb4 Nxe5 Qe7
C47 Belgrade Gambit, 4 Knights e4 e5 Nf3 Nc6 Nc3 Nf6 d4 exd4 Nd5
C47 Schmid Gambit, Four Knights e4 e5 Nf3 Nc6 Nc3 Nf6 d4 exd4 Nxd4 Nxe4
C46 Halloween Gambit, Four Knights e4 e5 Nf3 Nc6 Nc3 Nf6 Nxe5
C44 Chicago; Irish; Schulze-Muller Gambit e4 e5 Nf3 Nc6 Nxe5 Nxe5 d4
C42 Petroff Defense; Russian Defense; C42 e4 e5 Nf3 Nf6
C42 Urosov Gambit, Petroff e4 e5 Nf3 Nf6 Bc4
C42 Boden-Kieseritzky Gambit, Petroff e4 e5 Nf3 Nf6 Bc4 Nxe4 Nc3
C42 Lichtenhein Defense, Petroff e4 e5 Nf3 Nf6 Bc4 Nxe4 Nc3 d5
C43 Modern Attack, Petroff e4 e5 Nf3 Nf6 d4
C43 Symmetrical Variation, Petroff e4 e5 Nf3 Nf6 d4 d5
C43 Suchting Gambit, Petroff e4 e5 Nf3 Nf6 d4 exd4 Bc4
C43 Tal Gambit, Petroff e4 e5 Nf3 Nf6 d4 exd4 e5 Ne4 Bb5
C43 Center Attack, Petroff e4 e5 Nf3 Nf6 d4 exd4 e5 Ne4 Qxd4
C43 Trifunovic Variation, Petroff e4 e5 Nf3 Nf6 d4 Nxe4 Bd3 d5 Nxe5 Bd6 O-O O-O c4 Bxe5
C43 Murret Variation, Petroff e4 e5 Nf3 Nf6 d4 Nxe4 Bd3 Nc6
C42 Russian Three Knights Var, Petroff e4 e5 Nf3 Nf6 Nc3
C43 Steinitz Variation, Petoff; C43 e4 e5 Nf3 Nf6 Nxe5 d6 d4
C43 Urusov Gambit, Petroff e4 e5 Nf3 Nf6 Nxe5 d6 d4 exd4 Bc4
C42 Paulsen Attack, Petroff e4 e5 Nf3 Nf6 Nxe5 d6 Nc4
C42 Karklins-Martinovsky Variation, Petroff e4 e5 Nf3 Nf6 Nxe5 d6 Nd3
C42 Millenium Attack, Petroff e4 e5 Nf3 Nf6 Nxe5 d6 Nf3 Nxe4 Bd3
C42 Kaufmann Variation, Petroff e4 e5 Nf3 Nf6 Nxe5 d6 Nf3 Nxe4 c4
C42 French Attack, Petroff e4 e5 Nf3 Nf6 Nxe5 d6 Nf3 Nxe4 d3
C42 Classical Attack, Petroff e4 e5 Nf3 Nf6 Nxe5 d6 Nf3 Nxe4 d4
C42 Marshall Variation, Petroff e4 e5 Nf3 Nf6 Nxe5 d6 Nf3 Nxe4 d4 d5 Bd3 Bd6
C42 Tarrasch Variation, Petroff e4 e5 Nf3 Nf6 Nxe5 d6 Nf3 Nxe4 d4 d5 Bd3 Bd6 O-O O-O c4 Bg4
C42 Staunton Variation, Petroff e4 e5 Nf3 Nf6 Nxe5 d6 Nf3 Nxe4 d4 d5 Bd3 Bd6 O-O O-O c4 c6
C42 Jaenisch Variation, Petroff e4 e5 Nf3 Nf6 Nxe5 d6 Nf3 Nxe4 d4 d5 Bd3 Be7 O-O Nc6 c4
C42 Browne Attack, Petroff e4 e5 Nf3 Nf6 Nxe5 d6 Nf3 Nxe4 d4 d5 Bd3 Be7 O-O Nc6 c4 Nb4 cxd5
C42 Chigorin Variation, Petroff e4 e5 Nf3 Nf6 Nxe5 d6 Nf3 Nxe4 d4 d5 Bd3 Be7 O-O Nc6 Re1
C42 Berger Variation, Petroff e4 e5 Nf3 Nf6 Nxe5 d6 Nf3 Nxe4 d4 d5 Bd3 Be7 O-O Nc6 Re1 Bg4 c3 f5 Nbd2
C42 Mason Variation, Petroff e4 e5 Nf3 Nf6 Nxe5 d6 Nf3 Nxe4 d4 d5 Bd3 Be7 O-O O-O
C42 Mason-Showalter Variation, Petroff e4 e5 Nf3 Nf6 Nxe5 d6 Nf3 Nxe4 d4 d5 Bd3 Nc6
C42 Nimzovich Attack, Petroff e4 e5 Nf3 Nf6 Nxe5 d6 Nf3 Nxe4 Nc3
C42 Lasker Variation, Petroff e4 e5 Nf3 Nf6 Nxe5 d6 Nf3 Nxe4 Qe2
C42 Cozio (Lasker) Attack, Petroff e4 e5 Nf3 Nf6 Nxe5 d6 Nf3 Nxe4 Qe2
C42 Cochrane Gambit, Petroff e4 e5 Nf3 Nf6 Nxe5 d6 Nxf7
C42 Stafford Gambit, Petroff e4 e5 Nf3 Nf6 Nxe5 Nc6
C42 Damiano Variation, Petroff e4 e5 Nf3 Nf6 Nxe5 Nxe4
C42 Kholmov Gambit, Petroff e4 e5 Nf3 Nf6 Nxe5 Nxe4 Qe2 Qe7
C42 Moody Gambit, Petroff e4 e5 Nf3 Nf6 Qe2 Nc6 d4
C40 Levenstein; Queen’s Defense; Brazilian; Gunderam e4 e5 Nf3 Qe7
C40 Gunderam Gambit e4 e5 Nf3 Qe7 Bc4 f5
C40 McConnell Defense e4 e5 Nf3 Qf6
C40 Greco Defense e4 e5 Nf3 Qf6
C40 Labourdonnais Gambit e4 e5 Nf3 Qf6 Bc4 Qg6 O-O
C20 Napoleon Attack e4 e5 Qf3
C20 Wayward Queen; Danvers; Parnham e4 e5 Qh5
C20 Mellon Gambit e4 e5 Qh5 Nc6 Bc4 Nh6 d3 g6 Qf3 f6 Ne2 d5
C20 Kiddie Countergambit e4 e5 Qh5 Nf6
C00 French Defense; C00 e4 e6
C00 Reti (Horwitz) Variation, French e4 e6 b3
C00 Papa-Ticulat Gambit, French e4 e6 b3 d5 Bb2
C00 Banzai-Leong Gambit, French e4 e6 b4
C00 Pinova Gambit e4 e6 b4 Bxb4 e5
C00 Bird Invitation, French e4 e6 Bb5
C00 Orthoschapp Variation, French e4 e6 c4 d5 cxd5 exd5 Qb3
C00 King”s Indian Attack e4 e6 d3
C00 Reversed Philidor, French e4 e6 d3 d5 Nd2 Nf6 Ngf3 Nc6 Be2
C00 Franco-Hiva Gambit, French e4 e6 d3 f5
C01 C01 e4 e6 d4
C01 Baeuerle Gambit, French e4 e6 d4 b5
C01 Schlechter Variation, French e4 e6 d4 d5 Bd3
C00 Alapin; Witaker Gambit, French e4 e6 d4 d5 Be3
C00 Alapin-Diemer Gambit, French e4 e6 d4 d5 Be3 dxe4 f3
C00 Diemer-Duhm Gambit, French e4 e6 d4 d5 c4
C02 Advance Variation, French; C02 e4 e6 d4 d5 e5
C02 Extended Bishop Swap, French e4 e6 d4 d5 e5 Bd7
C02 Advance; Nimzovich; Steinitz Var, Fr e4 e6 d4 d5 e5 Bd7
C02 Frenkel Gambit, French e4 e6 d4 d5 e5 c5 b4
C02 Paulsen Attack, French e4 e6 d4 d5 e5 c5 c3 Nc6 Nf3
C02 Euwe Variation, French e4 e6 d4 d5 e5 c5 c3 Nc6 Nf3 Bd7
C02 Lputian Variation, French e4 e6 d4 d5 e5 c5 c3 Nc6 Nf3 Qb6 a3 Nh6
C02 Milner-Barry Gambit, French e4 e6 d4 d5 e5 c5 c3 Nc6 Nf3 Qb6 Bd3
C02 Milner-Barry Gambit, French e4 e6 d4 d5 e5 c5 c3 Nc6 Nf3 Qb6 Bd3 cxd3 cxd3 Bd7 O-O Nxd4 Nxd4
C02 Wade Variation, French e4 e6 d4 d5 e5 c5 c3 Qb6 Nf3 Bd7
C02 Nimzovich Variation, French e4 e6 d4 d5 e5 c5 Nf3
C02 Ruisdonk Gambit, French e4 e6 d4 d5 e5 c5 Nf3 cxd4 Bd3
C02 Nimzovich Attack, French e4 e6 d4 d5 e5 c5 Qg4
C01 Exchange Variation, French e4 e6 d4 d5 exd5 exd5
C01 Monte Carlo Variation, French e4 e6 d4 d5 exd5 exd5 c4
C01 Svenius Variation, French e4 e6 d4 d5 exd5 exd5 Nc3 Nf6 Bg5
C10 Normal Variation, French; C10 e4 e6 d4 d5 Nc3
C15 Winawer Variation, French; C15 e4 e6 d4 d5 Nc3 Bb4
C15 Winckelmann-Riemer Gambit, French e4 e6 d4 d5 Nc3 Bb4 a3
C15 Fingerslip Variation, French e4 e6 d4 d5 Nc3 Bb4 Bd2
C15 Kunin Double Gambit, French e4 e6 d4 d5 Nc3 Bb4 Bd2 dxe4 Qg4 Qxd4
C15 Schwarz’s Line, French e4 e6 d4 d5 Nc3 Bb4 Bd2 Ne7 Nb1
C15 Kondratiyev Variation, French e4 e6 d4 d5 Nc3 Bb4 Bd3 c5 exd5 Qxd5 Bd2
C16 C16 e4 e6 d4 d5 Nc3 Bb4 e5
C17 C17 e4 e6 d4 d5 Nc3 Bb4 e5 c5
C18 C18 e4 e6 d4 d5 Nc3 Bb4 e5 c5 a3
C18 Swiss (Retreat) Variation, French e4 e6 d4 d5 Nc3 Bb4 e5 c5 a3 Ba5
C18 Armenian Line, French e4 e6 d4 d5 Nc3 Bb4 e5 c5 a3 Ba5 b4 cxd4
C19 C19 e4 e6 d4 d5 Nc3 Bb4 e5 c5 a3 Bxc3+ bxc3 Ne7
C19 Poisoned Pawn Variation, French Winawer e4 e6 d4 d5 Nc3 Bb4 e5 c5 a3 Bxc3+ bxc3 Ne7 Qg4
C18 Maroczy-Willis Variation, French e4 e6 d4 d5 Nc3 Bb4 e5 c5 a3 cxd4 axb4 dxc3
C17 Bogoljubow Variation, French e4 e6 d4 d5 Nc3 Bb4 e5 c5 Bd2
C17 Icelandic Defense, French e4 e6 d4 d5 Nc3 Bb4 e5 c5 Bd2 Ne7 f4
C17 Moscow Variation, French e4 e6 d4 d5 Nc3 Bb4 e5 c5 Qg4
C16 Petrosian Variation, French e4 e6 d4 d5 Nc3 Bb4 e5 Qd7
C15 Delayed Exchange Variation, French e4 e6 d4 d5 Nc3 Bb4 exd5
C01 Canal Attack, French e4 e6 d4 d5 Nc3 Bb4 exd5 exd5 Bd3 Ne7 Qh5
C15 Alekhine (Maroczy) Variation, French e4 e6 d4 d5 Nc3 Bb4 Ne2
C15 Kan Variation, French e4 e6 d4 d5 Nc3 Bb4 Ne2 dxe4 a3 Bxc3+ Nxc3 Nc6
C10 Marshall Variation, French e4 e6 d4 d5 Nc3 c5
C10 Rubinstein Variation, French e4 e6 d4 d5 Nc3 dxe4
C10 Fort Knox Variation, French e4 e6 d4 d5 Nc3 dxe4 Bd7 Nf3 Bc6
C10 Rasa-Studier Gambit, French e4 e6 d4 d5 Nc3 dxe4 Be3
C10 Ellis Gambit, French e4 e6 d4 d5 Nc3 dxe4 Nxe4 e5
C10 Blackburne Defense, French e4 e6 d4 d5 Nc3 dxe4 Nxe4 Nd7
C10 Capablanca Line, French e4 e6 d4 d5 Nc3 dxe4 Nxe4 Nd7 Nf3 Ngf6 Nxf6+ Nxf6 Ne5
C10 Frere; Becker; Katilimov, Maric Var, French e4 e6 d4 d5 Nc3 dxe4 Nxe4 Qd5
C11 Classical Variation, French; C11 e4 e6 d4 d5 Nc3 Nf6
C11 Swiss Variation, French e4 e6 d4 d5 Nc3 Nf6 Bd3
C11 Henneberger Variation, French e4 e6 d4 d5 Nc3 Nf6 Be3
C12 C12 e4 e6 d4 d5 Nc3 Nf6 Bg5
C12 McCutcheon Variation, French e4 e6 d4 d5 Nc3 Nf6 Bg5 Bb4
C12 Olland (Dutch) Variation, French e4 e6 d4 d5 Nc3 Nf6 Bg5 Bb4 e5 h6 Bc1
C12 Lasker Variation, French e4 e6 d4 d5 Nc3 Nf6 Bg5 Bb4 e5 h6 Bd2 Bxc3
C12 Duras Variation, French e4 e6 d4 d5 Nc3 Nf6 Bg5 Bb4 e5 h6 Bd2 Bxc3 bxc3 Ne4 Qg4 Kf8 Bc1
C12 Tartakower Variation, French e4 e6 d4 d5 Nc3 Nf6 Bg5 Bb4 e5 h6 Bd2 Nfd7
C12 Janowski Variation, French e4 e6 d4 d5 Nc3 Nf6 Bg5 Bb4 e5 h6 Be3
C12 Bernstein Variation, French e4 e6 d4 d5 Nc3 Nf6 Bg5 Bb4 e5 h6 Bh4
C12 Chigorin Variation, French e4 e6 d4 d5 Nc3 Nf6 Bg5 Bb4 e5 h6 exf6
C12 Grigoriev Variation, French e4 e6 d4 d5 Nc3 Nf6 Bg5 Bb4 e5 h6 exf6 hxg5 fxg7 Rg8 h4 gxh4 Qg4
C12 Wolf Gambit, French e4 e6 d4 d5 Nc3 Nf6 Bg5 Bb4 Nge2
C14 C14 e4 e6 d4 d5 Nc3 Nf6 Bg5 Be7
C14 Anderssen (Richter) Attack, French e4 e6 d4 d5 Nc3 Nf6 Bg5 Be7 Bxf6
C14 Tartakower Variation, French e4 e6 d4 d5 Nc3 Nf6 Bg5 Be7 e5 Ne4
C14 Classical Variation, French e4 e6 d4 d5 Nc3 Nf6 Bg5 Be7 e5 Nfd7 Bxe7 Qxe7
C14 Tarrasch Variation, French e4 e6 d4 d5 Nc3 Nf6 Bg5 Be7 e5 Nfd7 Bxe7 Qxe7 Bd3
C14 Steinitz Variation, French e4 e6 d4 d5 Nc3 Nf6 Bg5 Be7 e5 Nfd7 Bxe7 Qxe7 f4
C14 Alapin Variation, French e4 e6 d4 d5 Nc3 Nf6 Bg5 Be7 e5 Nfd7 Bxe7 Qxe7 Nb5
C14 Rubinstein Variation, French e4 e6 d4 d5 Nc3 Nf6 Bg5 Be7 e5 Nfd7 Bxe7 Qxe7 Qd2
C14 Pollock Variation, French e4 e6 d4 d5 Nc3 Nf6 Bg5 Be7 e5 Nfd7 Bxe7 Qxe7 Qg4
C14 Chatard-Alekhine; Albin Attack, Fr e4 e6 d4 d5 Nc3 Nf6 Bg5 Be7 e5 Nfd7 h4
C14 Maroczy Variation, French e4 e6 d4 d5 Nc3 Nf6 Bg5 Be7 e5 Nfd7 h4 a6
C14 Albin-Chatard Gambit, French e4 e6 d4 d5 Nc3 Nf6 Bg5 Be7 e5 Nfd7 h4 Bxg5 hxg5 Qxg5
C14 Breyer Variation, French e4 e6 d4 d5 Nc3 Nf6 Bg5 Be7 e5 Nfd7 h4 c5
C14 Teichmann Variation, French e4 e6 d4 d5 Nc3 Nf6 Bg5 Be7 e5 Nfd7 h4 f6
C14 Spielmann Variation, French e4 e6 d4 d5 Nc3 Nf6 Bg5 Be7 e5 Nfd7 h4 O-O
C13 Vistaneckis (Nimzovich) Variation, French e4 e6 d4 d5 Nc3 Nf6 Bg5 Be7 e5 Ng8
C13 Frankfurt Variation, French e4 e6 d4 d5 Nc3 Nf6 Bg5 Be7 e5 Ng8 Be3 b6
C11 Burn Variation, French e4 e6 d4 d5 Nc3 Nf6 Bg5 dxe4
C13 C13 e4 e6 d4 d5 Nc3 Nf6 Bg5 dxe4
C11 Steinitz Variation, French e4 e6 d4 d5 Nc3 Nf6 e5
C11 Bradford Attack, French e4 e6 d4 d5 Nc3 Nf6 e5 Nfd7 f4 c5 dxc5 Bxc5 Qg4
C11 Brodsky-Jones Variation, French e4 e6 d4 d5 Nc3 Nf6 e5 Nfd7 f4 c5 dxc5 Nc6 a3 Bxc5 Qg4 O-O Nf3 f6
C11 Boleslavsky Variation, French e4 e6 d4 d5 Nc3 Nf6 e5 Nfd7 f4 c5 Nf3 Nc6 Be3
C11 Gledhill Attack, French e4 e6 d4 d5 Nc3 Nf6 e5 Nfd7 Qg4
C10 Svenonius Variation, French e4 e6 d4 d5 Nc3 Nf6 exd5
C03 Tarrasch Variation, French; C03 e4 e6 d4 d5 Nd2
C03 Morozevich Variation, French e4 e6 d4 d5 Nd2 Be7
C07 Open System Tarrasch French; C07 e4 e6 d4 d5 Nd2 c5
C08 C08 e4 e6 d4 d5 Nd2 c5 exd5 exd5
C09 C09 e4 e6 d4 d5 Nd2 c5 exd5 exd5 Ngf3 Nc6
C07 Shaposhnikov Gambit, French e4 e6 d4 d5 Nd2 c5 exd5 Nf6
C07 Chistiakov Defense, French e4 e6 d4 d5 Nd2 c5 exd5 Qxd5
C03 Haberditz Variation, French e4 e6 d4 d5 Nd2 f5
C04 C04 e4 e6 d4 d5 Nd2 Nc6
C06 Botvinnik Variation, French e4 e6 d4 d5 Nd2 Nc6 e4 Nfd7 Bd3 c5 c3 b6
C04 Guimard Variation, French e4 e6 d4 d5 Nd2 Nc6 Ngf3 Nf6 e5 Nfd7
C04 Leningrad Variation, French e4 e6 d4 d5 Nd2 Nc6 Ngf3 Nf6 e5 Nfd7 f4 c5 c3 Nc6 Ndf3 cxd4 cxd4
C05 C05 e4 e6 d4 d5 Nd2 Nf6
C06 C06 e4 e6 d4 d5 Nd2 Nf6 e5 Nfd7 Bd3
C01 Perseus Gambit, French e4 e6 d4 d5 Nf3
C01 Carlson Gambit, French e4 e6 d4 d5 Nf3 dxe4 Ne5
C01 Morphy Gambit, French e4 e6 d4 d5 Nh3
C01 Hoffman Gambit e4 e6 d4 d5 Qe2 e5 f4 exf4
C01 Franco-Hiva Gambit I, French e4 e6 d4 f5
C01 Mediterranean Defense, French e4 e6 d4 Nf6
C00 Steinitz Attack, French e4 e6 e5
C00 Bourdonnais (La Bourdonnais) Variation, French e4 e6 f4
C00 Reuter Gambit, French e4 e6 f4 d5 Nf3 dxe4 Ng5
C00 Reti-Spielmann Attack, French e4 e6 g3
C00 Queen’s Knight, French e4 e6 Nc3
C00 Pelikan Variation, French e4 e6 Nc3 d5 f4
C00 Two Knight Variation, French e4 e6 Nc3 d5 Nf3
C00 Knight Variation, French e4 e6 Nf3
C00 Wing Gambit, French e4 e6 Nf3 d5 e5 c5 b4
C00 Two Knights Variation, French e4 e6 Nf3 d5 Nc3
C00 Chigorin Variation, French e4 e6 Qe2
B00 Mao Tse Tung; Duras e4 f5
B00 Fred; From Reversed e4 f5
B00 Tiers Counter-Gambit e4 f5
B00 Barnes Defense e4 f6
B00 Basman Defense; Macho Grob e4 g5
B00 Basman; Macho Grob; Borg e4 g5
B00 Borg Gambit e4 g5 d4 Bg7
B00 Zilbermints Gambit, Borg e4 g5 d4 e5
B00 Borg Defense; Troon Gambit e4 g5 d4 h6 h4 g4
B06 Pirc; Robatsch; Modern; King Pawn Fianchetto; B06 e4 g6
B06 Monkey’s Bum, Pirc e4 g6 Bc4 Bg7 Qf3 e6 d4
B06 Bishop Attack e4 g6 d4 Bg7 Bc4
B06 Buecker Gambit e4 g6 d4 Bg7 Bc4 b5
B06 Westermann Gambit e4 g6 d4 Bg7 Bd2
B06 Wind Gambit e4 g6 d4 Bg7 Bd3
A40 Polish Variation e4 g6 d4 Bg7 c4 c5 Nf3 Qb6
A40 Dunworth Variation, Modern Defense e4 g6 d4 Bg7 c4 d5 exd5 c6 dxc6 Bxd4
B06 Three Pawns Attack e4 g6 d4 Bg7 f4
B06 Pterodactyl, Pirc e4 g6 d4 Bg7 Nc3 c5
B06 Gurgenidze Defense, Modern Defense e4 g6 d4 Bg7 Nc3 c6 f4 d5 e5 h5
B06 Mittenberger Gambit, Modern Defense e4 g6 d4 Bg7 Nc3 d5
B06 Anti-Modern e4 g6 d4 Bg7 Nc3 d6 Bc4 c6 Qe2
B06 Pseudo-Austrian Attack e4 g6 d4 Bg7 Nc3 d6 f4
B06 Two Knight Variation, Modern Defense e4 g6 d4 Bg7 Nc3 d6 Nf3
B06 Suttles Variation, Modern Defense e4 g6 d4 Bg7 Nc3 d6 Nf3 c6
B06 Mongredien Defense, Pirc e4 g6 d4 Bg7 Nf3 b6
B06 Geller’s System, Modern Defense e4 g6 d4 Bg7 Nf3 d6 c3
B06 Rossolimo Variation, Modern Defense e4 g6 d4 Bg7 Nf3 d6 c4 Bg4
B06 Accelerated Gurgenidze e4 g6 d4 Bg7 Nf3 d6 Nc3 c6
B06 Small Center Variation, Pirc e4 g6 d4 Bg7 Nf3 d6 Nc3 e6
B06 Fianchetto Gambit, Modern Defense e4 g6 d4 f5
B06 Norwegian Defense e4 g6 d4 Nf6
B06 Masur Gambit e4 g6 d4 Nh6 Nc3 f5 Bxh6 Bxh6 exf5 O-O
B00 Pickering (Goldsmith) Defense e4 h5
B00 Picklepuss Defense e4 h5 d4 Nf6
B00 Carr Defense e4 h6
B00 Zilbermints Gambit, Carr Defense e4 h6 d4 e5
B00 Lemming Defense e4 Na6
B00 Nimzovich Defense e4 Nc6
B00 Wheeler Gambit, Nimzovich Defense e4 Nc6 b4 Nxb4 c3 Nc6 d4
B00 Pseudo-Spanish Variation e4 Nc6 Bb5
B00 Scandanavian Variation, Nimzovich Defense e4 Nc6 d4 d5
B00 Hornung Gambit, Nimzovich Defense e4 Nc6 d4 d5 Be3
B00 Aachen Gambit, Nimzovich Defense e4 Nc6 d4 d5 exd5 Nb4
B00 Marshall Gambit, Nimzovich e4 Nc6 d4 d5 exd5 Qxd5 Nc3
B00 Bogoljubow Variation, Nizovich Defense e4 Nc6 d4 d5 Nc3
B00 Brandics Gambit, Nimzovich Defense e4 Nc6 d4 d5 Nc3 a6
B00 Richter Gambit, Nimzovich Defense e4 Nc6 d4 d5 Nc3 dxe4 d5 Nb8 f3
B00 Nimzovich Gambit, Nimzovich Defense e4 Nc6 d4 d5 Nc3 dxe4 d5 Ne5
B00 Alekseev Variation, Nimzovich; Heinola-Deppe Gambit e4 Nc6 d4 d5 Nc3 e5
B00 Erben Gambit, Nimzovich Defense e4 Nc6 d4 d5 Nc3 g6
B00 Vehre Variation, Nimzovich Defense e4 Nc6 d4 d5 Nc3 Nf6
B00 Mikenas Variation, Nimzovich Defense e4 Nc6 d4 d6
B00 Kennedy Variation, Nimzovich e4 Nc6 d4 e5
B00 Linksspringer Variation, Nimzovich Defense e4 Nc6 d4 e5 d5
B00 Bileefelder Gambit, Nimzovich Defense e4 Nc6 d4 e5 dxe5 Bc5
B00 Burgar Gambit, Nimzovich Defense e4 Nc6 d4 e5 dxe5 d6
B00 Hammer Gambit, Nimzovich Defense e4 Nc6 d4 e5 dxe5 f6
B00 Riemann Defense, Nimzovich Defense e4 Nc6 d4 e5 dxe5 Nxe5 f4 Nc6
B00 Keres Attack, Nimzovich Defense e4 Nc6 d4 e5 dxe5 Nxe5 Nc3
B00 Paulsen Attack, Nimzovich Defense e4 Nc6 d4 e5 dxe5 Nxe5 Nf3
B00 Herford Gambit, Nimzovich Defense e4 Nc6 d4 e5 dxe5 Qh4
B00 French Connection, Nimzovich Defense e4 Nc6 d4 e6
B00 Neo-Mongoloid Defense, Nimzovich e4 Nc6 d4 f6
B00 Pirc Connection, Nimzovich Defense e4 Nc6 d4 g6
B00 Breyer Defense, Nimzovich e4 Nc6 Nc3 Nf6
B00 Williams Variation, Nimzovich e4 Nc6 Nf3 d6
B00 Franco-Nimzovich Variation e4 Nc6 Nf3 e6
B00 Colorado Defense, Nimzovich; Lean Variation e4 Nc6 Nf3 f5
B00 Colorado Counter Accepted, Nimzovich Defense e4 Nc6 Nf3 f5 exf5
B00 El Columpio Defense, Nimzovich Defense e4 Nc6 Nf3 Nf6 e5 Ng4
B02 Alekhine’s Defense; B02 e4 Nf6
B02 Krejcik Variation, Alekhine e4 Nf6 Bc4
B02 Fried Fox, Alekhine; Krejcik Gambit e4 Nf6 Bc4 Nxe4 Bxf7+
B02 Maroczy Variation, Alekhine e4 Nf6 d3
B02 Welling Variation, Alekhine e4 Nf6 e5 Nd5 b3
B02 Kmoch Variation, Alekhine e4 Nf6 e5 Nd5 Bc4 Nb6 Bb3 c5 d3
B02 Hunt Gambit, Alekhine; Two Pawn Attack e4 Nf6 e5 Nd5 c4
B02 Steiner Variation, Alekhine e4 Nf6 e5 Nd5 c4 Nb6 b3
B02 Lasker Variation, Alekhine e4 Nf6 e5 Nd5 c4 Nb6 c5
B02 Mikenas Gambit, Alekhine e4 Nf6 e5 Nd5 c4 Nb6 c5 Nd5 Bc4 e6 Nc3 d6 Nxd5 exd5 Bxd5
B02 Matsukevich Gambit, Alekhine e4 Nf6 e5 Nd5 c4 Nb6 c5 Nd5 Nc3 Nxc3 dxc3 d6 Bg5
B03 B03 e4 Nf6 e5 Nd5 d4
B03 Wall Variation, Alekhine e4 Nf6 e5 Nd5 d4 c5
B03 Balogh Variation, Alekhine e4 Nf6 e5 Nd5 d4 d6 Bc4
B03 Hunt Variation, Alekhine e4 Nf6 e5 Nd5 d4 d6 c4 Nb6 c5
B03 Four Pawns Attack; Chase V e4 Nf6 e5 Nd5 d4 d6 c4 Nb6 f4
B03 Trifunovic Variation, Alekhine e4 Nf6 e5 Nd5 d4 d6 c4 Nb6 f4 Bf5
B03 Cambridge Gambit, Alekhine e4 Nf6 e5 Nd5 d4 d6 c4 Nb6 f4 g5
B04 B04 e4 Nf6 e5 Nd5 d4 d6 Nf3
B05 B05 e4 Nf6 e5 Nd5 d4 d6 Nf3 Bg4
B05 Flohr Variation, Alekhine e4 Nf6 e5 Nd5 d4 d6 Nf3 Bg4 Be2 c6
B05 Alekhine Variation, Alekhine e4 Nf6 e5 Nd5 d4 d6 Nf3 Bg4 c4
B04 Panov Variation, Alekhine e4 Nf6 e5 Nd5 d4 d6 Nf3 Bg4 h3
B04 Larsen Variation, Alekhine e4 Nf6 e5 Nd5 d4 d6 Nf3 dxe5
B04 Alburt Variation, Alekhine e4 Nf6 e5 Nd5 d4 d6 Nf3 g6
B04 Keres Variation, Alekhine e4 Nf6 e5 Nd5 d4 d6 Nf3 g6 Bc4 Nb6 Bb3 Bg7 a4
B04 Karpov Variation, Alekhine e4 Nf6 e5 Nd5 d4 d6 Nf3 g6 c4 Nb6 h3 Bg7 Be2
B04 Schmid Variation, Alekhine e4 Nf6 e5 Nd5 d4 d6 Nf3 Nb6
B02 Buntin Gambit, Alekhine e4 Nf6 e5 Nd5 e6
B02 Buckley Attack, Alekhine e4 Nf6 e5 Nd5 Na3
B02 Saemisch Attack, Alekhine e4 Nf6 e5 Nd5 Nc3
B02 Mokele Mbembe; Knight’s Tour e4 Nf6 e5 Ne4
B02 Retreat; Brooklyn Variation, Alekhine e4 Nf6 e5 Ng8
B02 Everglades Defense, Alekhine e4 Nf6 e5 Ng8 d4 f5
B02 Scandanavian Variation, Alekhine e4 Nf6 Nc3 d5
B02 Myers Gambit, Alekhine e4 Nf6 Nc3 d5 d3 dxe4 Bg5
B02 Spielmann Variation, Alekhine e4 Nf6 Nc3 d5 e5 Nfd7 e6
B02 Noch Gambit, Alekhine e4 Nf6 Nc3 d5 exd5
B02 Geschev Gambit, Alekhine e4 Nf6 Nc3 d5 exd5 c6
B02 John Tracy Gambit, Alekhine e4 Nf6 Nf3
B00 Adams Defense e4 Nh6
B00 Wild Bull Defense e4 Nh6
A02 Bird’s Opening; Dutch Attack f4
A03 A03 f4 d5
A03 Sturm; Mujannah f4 d5 c4
A03 Prokofiev Gambit, Bird f4 d5 e4 dxe4 d3
A03 Williams Gambit, Bird f4 d5 e4 dxe4 Nc3
A02 From’s Gambit, Bird f4 e5
A02 Canard Formation; Double Duck f4 f5 d4 d5
A02 Pawn Thrust Attack, Bird f4 f5 d4 d5
A02 Swiss Gambit, Bird f4 f5 e4 fxe4 Nc3 Nf6 g4
A02 Hobbs Gambit, Bird f4 g5
A02 Batavo Polish Attack, Bird f4 Nf6 Nf3 g6 b4
A03 Horsefly Defense, Bird f4 Nh6
A04 Reti; Zukertort; A04 Nf3
A06 A06 Nf3 d5
A06 Nimzovich Opening, Reti Nf3 d5 b3
A06 Bloodgood Gambit, Reti Nf3 d5 b3 c5 e4 dxe4 Ne5
A06 Santasiere’s Folly, Reti Nf3 d5 b4
A09 Reti; Landstrasser G; Wolf G; A09 Nf3 d5 c4
A09 London V; New York V, Reti Nf3 d5 c4 c6 b3 Nf6 Bg2 e6 Bb2 Nbd7
A09 Benoni Reversed; Wing Blumenfeld Nf3 d5 c4 d4
A09 Reti Polonaise Nf3 d5 c4 d4 b4
A09 Penguin Variation, Reti Nf3 d5 c4 d4 Rg1
A09 Reti Gambit Accepted Nf3 d5 c4 dxc4
A09 Neo-Catalan, Reti Nf3 d5 c4 e6 g3
A06 Old Indian Attack Nf3 d5 d3
A06 Tennison G; Lemberg G; Abonyi G Nf3 d5 e4
A07 Barcza Opening, Reti; A07 Nf3 d5 g3
A08 A08 Nf3 d5 g3 c5
A06 Reversed Mexican Defense, Reti Nf3 d5 Nc3
A06 Ampel Variation, Reti Nf3 d5 Rg1
A04 Wade Defense Nf3 d6
A06 Improved Lisitsin G, Reti Nf3 f5 d3
A04 Lisitsin Gambit; Polish Gambit Nf3 f5 e4
A04 Rydel-Bloodgood Gambit Nf3 f5 e4 exf4 Ne5
A04 Polish G; Dalesio G; Pirc-Lisitsin G Nf3 f5 e4 fxe4 Ng5
A04 Herrstrom Gambit, Reti Nf3 g5
A04 Oberndorfer Gambit; Reti Nf3 g5
A04 Lessing Defense Nf3 Nc6
A05 King’s Indian Attack; Reti; Zukertort; A05 Nf3 Nf6

We will continue to update this page so it’s as accurate as possible.


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  1. ^ The Swedish company called Chess Informant.
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