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 1.a4 b6 2.d4 d5 2.Nc3 Nd7
A00 Ware Gambit 1.a4 e5 2.a5 d5 3.e3 f5 4.a6
A00 Polish; Orangutan; Sokolsky; Hunt 1.b4
A00 Birmingham Gambit, Polish 1.b4 c5
A00 Outflank Variation, Polish 1.b4 c6
A00 Schuhler Gambit, Polish 1.b4 c6 2.Bb2 a5 3.b5 cxb5 4.e4
A00 Myers Variation, Polish 1.b4 d5 2.Bb2 c6 3.a4
A00 Bugayev Attack, Polish 1.b4 e5 2.a3
A00 Wolferts Gambit, Polish 1.b4 e5 2.Bb2 c5
A00 Schiffler-Sokolsky; Tartakower Gambit 1.b4 e5 2.Bb2 f6 3.e4 Bxb4
A00 Brinckmann Variation, Polish 1.b4 e5 2.Bb2 f6 3.e4 Bxb4 4.Bc4 Nc6 5.f4 Qe7 6.f5 g6
A00 Bucker Defense, Polish 1.b4 Na6
A00 Grigorian Variation, Polish 1.b4 Nc6
A00 Polish Spike 1.b4 Nf6 2.Bb2 g6 3.g4
A00 Karniewski; Tubingen Variation, Polish 1.b4 Nh6
A00 Saragossa; Hempel's Opening 1.c3
A00 Hanham; Hayward 1.c3 e5 2.Qc2
A00 Mieses; Valencia; Venezuelan Opening 1.d3
A00 Venezolana 1.d3 c5 2.Nc3 Nc6 3.g3
A00 Reversed Rat 1.d3 e5
A00 Spike Deferred; Myers Spike Attack 1.d3 g6 2.g4
A00 Keoni-Hiva Gambit 1.e3 d5 2.Nc3 Nf6 3.a3 e5 4.f4 exf4 5.Nf3
A00 Van't Kruijs Opening 1.e3 e5
A00 Bouncing Bishop Variation 1.e3 e5 2.Bc4 b5 3.Bb3
A00 Amsterdam Attack 1.e3 e5 2.c4 d6 3.Nc3 Nc6 4.b3 Nf6
A00 Ekolu Variation 1.e3 e5 2.Nc3 d5 3.f4 exf4 4.Nf3
A00 Alua Variation 1.e3 e5 2.Nc3 Nc6 3.f4 exf4 4.Nf3
A00 Akahi Variation 1.e3 e5 2.Nc3 Nf6 3.f4 exf4 4.Nf3
A00 Barnes; Gedult-Gunderam; Walkerling 1.f3
A00 King's Head Opening 1.f3 e5 2.e4
A00 Hammerschlag; Pork Chop Opening 1.f3 e5 2.Kf2
A00 Benko; Barczay; Bilek; Hungarian 1.g3
A00 Gambit 59 1.g3 d5 2.Bg2 e5 3.b4
A00 Regan Variation 1.g3 d5 2.Bg2 e5 3.d4
A00 Reversed Alekhine 1.g3 e5 2.Nf3
A00 Lasker Simul Special 1.g3 h5
A00 Grob; Ahlhausen; Colibri; Fric; Genoa; Spike 1.g4
A00 Grob Gambit 1.g4 d5 2.Bg2 Bxg4
A00 Romford Counter-Gambit, Grob 1.g4 d5 2.Bg2 Bxg4 3.c4 d4
A00 Spike, Grob 1.g4 d5 2.Bg2 c6 3.g5
A00 Short Spike, Grob 1.g4 d5 2.Bg2 c6 3.h3
A00 Zilbermints Gambit, Grob 1.g4 d5 2.e4
A00 Keene Defense, Grob 1.g4 d5 2.h3 e5
A00 Hurst Attack, Grob 1.g4 e5 2.Bg2 d5 3.c4
A00 Alessi Gambit, Grob 1.g4 f5
A00 Double Grob 1.g4 g5
A00 Spike Deferred 1.g4 g6 2.d3
A00 Bucker Defense, Grob 1.g4 Nh6
A00 Clemenz Opening 1.h3
A00 Kadas Opening 1.h4
A00 Despres Opening 1.h4
A00 Koola-Koola 1.h4 a5
A00 Wulumulu 1.h4 e5 2.d4
A00 Durkin's Opening; Sodium Attack 1.Na3
A00 Dunst; Heinrichsen; Will Bull; Kotrc 1.Nc3
A00 St. George Defense, Dunst 1.Nc3 a6
A00 Novosibirsk Variation, Dunst 1.Nc3 c5 2.d4 cxd4 3.Qxd4 Nc6 4.Qh4
A00 Twyble Attack, Dunst 1.Nc3 c5 2.Rb1
A00 Dunst Gambit 1.Nc3 d5 2.e4 dxe4 3.d3
A00 Pseudo-Diemer Gambit, Dunst 1.Nc3 d5 2.e4 dxe4 3.f3 exf3 4.Qxf3
A00 Amazon, Dunst 1.Nc3 d5 2.e4 dxe4 3.Nxe4 Qd5
A00 Reversed Nimzovich 1.Nc3 e5
A00 Battambang, Dunst 1.Nc3 e5 2.a3
A00 Irish Attack; Polish Attack 1.Nc3 e5 2.f4
A00 Napoleon Attack, Dunst 1.Nc3 e5 2.Nf3
A00 Glasscoe Gambit, Dunst 1.Nc3 f5 2.g4
A00 Anti-Pirc Variation, Dunst 1.Nc3 g6 2.h4
A00 Tubingen Gambit, Dunst 1.Nc3 Nf6 2.g4
A00 Amar; Paris Opening 1.Nh3
A00 Drunken Knight Opening 1.Nh3
A00 Krazy Kat 1.Nh3 e5 2.f3 d5 3.Nf2
A01 Larsen; Queen's Fianchetto; Nimzo-Larsen Attack A01 1.b3
A01 Symmetrical Variation, Larsen 1.b3 b6
A01 English Variation, Larsen 1.b3 c5
A01 Classical Variation, Larsen 1.b3 d5
A01 Modern Variation, Larsen 1.b3 e5
A01 Ringelbach Gambit, Larsen 1.b3 e5 2.Bb2 f5 3.e4
A01 Paschmann Gambit, Larsen 1.b3 e5 2.Bb2 Nc6 3.f4
A01 Dutch Variation, Larsen 1.b3 f5
A01 Indian Variation, Larsen 1.b3 Nf6
A01 Spike Variation, Larsen 1.b3 Nf6 2.Bb2 g6 3.g4
A02 Bird's Opening; Dutch Attack 1.f4
A02 From's Gambit, Bird 1.f4 e5
A02 Canard Formation; Double Duck 1.f4 f5 2.d4 d5
A02 Pawn Thrust Attack, Bird 1.f4 f5 2.d4 d5
A02 Swiss Gambit, Bird 1.f4 f5 2.e4 fxe4 3.Nc3 Nf6 4.g4
A02 Hobbs Gambit, Bird 1.f4 g5
A02 Batavo Polish Attack, Bird 1.f4 Nf6 2.Nf3 g6 3.b4
A03 A03 1.f4 d5
A03 Sturm; Mujannah 1.f4 d5 2.c4
A03 Prokofiev Gambit, Bird 1.f4 d5 2.e4 dxe4 3.d3
A03 Williams Gambit, Bird 1.f4 d5 2.e4 dxe4 3.Nc3
A03 Horsefly Defense, Bird 1.f4 Nh6
A04 Reti; Zukertort; A04 1.Nf3
A04 Wade Defense 1.Nf3 d6
A04 Lisitsin Gambit; Polish Gambit 1.Nf3 f5 2.e4
A04 Rydel-Bloodgood Gambit 1.Nf3 f5 2.e4 exf4 3.Ne5
A04 Polish G; Dalesio G; Pirc-Lisitsin G 1.Nf3 f5 2.e4 fxe4 3.Ng5
A04 Herrstrom Gambit, Reti 1.Nf3 g5
A04 Oberndorfer Gambit; Reti 1.Nf3 g5
A04 Lessing Defense 1.Nf3 Nc6
A05 King's Indian Attack; Reti; Zukertort; A05 1.Nf3 Nf6
A06 A06 1.Nf3 d5
A06 Nimzovich Opening, Reti 1.Nf3 d5 2.b3
A06 Bloodgood Gambit, Reti 1.Nf3 d5 2.b3 c5 3.e4 dxe4 4.Ne5
A06 Santasiere's Folly, Reti 1.Nf3 d5 2.b4
A06 Old Indian Attack 1.Nf3 d5 2.d3
A06 Tennison G; Lemberg G; Abonyi G 1.Nf3 d5 2.e4
A06 Reversed Mexican Defense, Reti 1.Nf3 d5 2.Nc3
A06 Ampel Variation, Reti 1.Nf3 d5 2.Rg1
A06 Improved Lisitsin G, Reti 1.Nf3 f5 2.d3
A07 Barcza Opening, Reti; A07 1.Nf3 d5 2.g3
A08 A08 1.Nf3 d5 2.g3 c5
A09 Reti; Landstrasser G; Wolf G; A09 1.Nf3 d5 2.c4
A09 London V; New York V, Reti 1.Nf3 d5 2.c4 c6 3.b3 Nf6 4.Bg2 e6 5.Bb2 Nbd7
A09 Benoni Reversed; Wing Blumenfeld 1.Nf3 d5 2.c4 d4
A09 Reti Polonaise 1.Nf3 d5 2.c4 d4 3.b4
A09 Penguin Variation, Reti 1.Nf3 d5 2.c4 d4 3.Rg1
A09 Reti Gambit Accepted 1.Nf3 d5 2.c4 dxc4
A09 Neo-Catalan, Reti 1.Nf3 d5 2.c4 e6 3.g3
A10 English Opening; A10 1.c4
A10 Halibut Gambit, English 1.c4 b5
A10 Anglo Scandanavian Defense, English 1.c4 d5
A10 Loehn Gambit, English 1.c4 d5 2.cxd5 e6
A10 Schulz Gambit, English 1.c4 d5 2.cxd5 Nf6
A10 Malvinas Variation, English 1.c4 d5 2.cxd5 Qxd5 3.Nc3 Qa5
A10 Anglo-Dutch Defense 1.c4 f5
A10 Anglo-Polish Dutch 1.c4 f5 2.b4
A10 Hickmann Gambit, English 1.c4 f5 2.e4
A10 Hickmann Gambit, English 1.c4 f5 2.e4 fxe4 3.d3
A10 Porcupine Variation, English 1.c4 f5 2.e4 fxe4 3.Nc3 Nf6 4.g4
A10 Wade Gambit, English 1.c4 f5 2.g4
A10 English Spike 1.c4 f5 2.g4
A10 Chabanon Gambit, English 1.c4 f5 2.Nf3 d6 3.e4
A10 Myers Defense, English 1.c4 g5 2.d4 Bg7
A10 Zilbermints Gambit, English 1.c4 g5 2.d4 e5
A10 Great Snake, English 1.c4 g6
A10 Adorjan System, English 1.c4 g6 2.e4 e5
A10 Beefeater 1.c4 g6 2.Nc3 Bg7 3.d4 c5 4.d5 Bxc3 5.bxc3 f5
A10 Anglo-Lithuanian Variation, English 1.c4 Nc6
A11 Anglo-Slav, English; A11 1.c4 c6
A12 A12 1.c4 c6 2.Nf3 d5 3.b3
A12 Bled Variation, English 1.c4 c6 2.Nf3 d5 3.b3 Nf6 4.g3 g6
A13 Agincourt; Kurajica Defense, English; A13 1.c4 e6
A13 English Defense 1.c4 e6 2.d4 b6
A13 King's Knight Variation, English 1.c4 e6 2.Nf3 d5
A13 Wimpy System, English 1.c4 e6 2.Nf3 d5 3.b3 Nf6 4.Bb2 c5 e3
A13 Afincourt Variation, English 1.c4 e6 2.Nf3 d5 3.g3
A13 Kurajica Defense, English 1.c4 e6 2.Nf3 d5 3.g3 c6
A13 Neo Catalan, English 1.c4 e6 2.Nf3 d5 3.g3 Nf6
A13 Neo Catalan Accepted, English 1.c4 e6 2.Nf3 d5 3.g3 Nf6 4.Bg2 dxc4
A13 Romanishin Gambit, English 1.c4 e6 2.Nf3 Nf6 3.g3 a6 4.Bg2 b5
A14 A14 1.c4 e6 2.Nf3 d5 3.g3 Nf6 4.Bg2 Be7
A14 Neo Catalan Declined, English 1.c4 e6 2.Nf3 d5 3.g3 Nf6 4.Bg2 Be7 5.O-O
A14 Keres Defense, English 1.c4 e6 2.Nf3 d5 3.g3 Nf6 4.Bg2 Be7 5.O-O c5
6.cxd5 Nxd5 7.Nc3 Nc6
A15 Anglo System, English; A15 1.c4 Nf6
A15 Mikenas-Carls Variation, English 1.c4 Nf6
A15 English Orangutan 1.c4 Nf6 2.b4
A15 Shirazi Shove 1.c4 Nf6 2.g3 h5
A15 King's Knight Variation, English 1.c4 Nf6 2.Nf3
A15 Romanishin Variation, English 1.c4 Nf6 2.Nf3 e6 3.g3 a6
A16 A16 1.c4 Nf6 2.Nc3
A16 Golombek Defense, English; Anti English 1.c4 Nf6 2.Nc3 d5
A16 Czech Variation, English 1.c4 Nf6 2.Nc3 d5 3.cxd5 Nxd5 4.g3 g6 5.Bg2 Nb6
A16 Korchnoi's Variation, English 1.c4 Nf6 2.Nc3 d5 3.cxd5 Nxd5 4.Nf3 g6 5.g3 Bg7 6.Bg2 e5
A16 Stein Attack, English 1.c4 Nf6 2.Nc3 d5 3.cxd5 Nxd5 4.Nf3 g6 5.Qa4+
A16 Anti-anti-grunfeld 1.c4 Nf6 2.Nc3 g6 3.Nf3 Bg7 4.e4
A17 Smyslov Defense, English 1.c4 Nf6 2.Nc3 d5 3.cxd5 Nxd5 4.g3 g6 5.Bg2 Nxc3
A17 Hegehog System, Anglo-Indian English; A17 1.c4 Nf6 2.Nc3 e6
A17 Nimzo-English Opening 1.c4 Nf6 2.Nc3 e6 3.Nf3 Bb4
A17 Zviagintsev-Krasenkov Attack, English 1.c4 Nf6 2.Nc3 e6 3.Nf3 Bb4 4.g4
A18 Flohr-Mikenas-Carls Variation, English; A18 1.c4 Nf6 2.Nc3 e6 3.e4
A18 Kevitz Defense, English 1.c4 Nf6 2.Nc3 e6 3.e4 Nc6
A18 Queen's Indian Formation, English 1.c4 Nf6 2.Nc3 e6 3.Nf3 b6
A19 Floh-Mikenas-Carls Variation, English; A19 1.c4 Nf6 2.Nc3 e6 3.e4 c5
A19 Nei Gambit, English 1.c4 Nf6 2.Nc3 e6 3.e4 c5 4.e5 Ng8
A20 King's English; A20 1.c4 e5
A20 Kahiko-Hula Gambit, English 1.c4 e5 2.e3 Nf6 4.f4 exf4 4.Nf3
A20 Double Whammy, English 1.c4 e5 2.f4
A20 Drill Variation, English 1.c4 e5 2.g3 h5
A20 Nimzovich Variation, English 1.c4 e5 2.Nf3
A20 Nimzovich-Flohr Variation, English 1.c4 e5 2.Nf3 e4
A20 English Queen 1.c4 e5 2.Qa4
A21 Reversed Sicilian, English; A21 1.c4 e5 2.Nc3
A21 Kramnik-Shirov Variation, English 1.c4 e5 2.Nc3 Bb4
A21 Troger Variation, English 1.c4 e5 2.Nc3 d6 3.g3 Be6 4.Bg2 Nc6
A21 Keres Defense, English 1.c4 e5 2.Nc3 d6 3.g3 c6
A21 General Variation, King's English 1.c4 e5 2.Nc3 d6 3.Nf3
A21 Smyslov Variation, English 1.c4 e5 2.Nc3 d6 3.Nf3 Bg4
A21 Anglo-Dutch 1.c4 e5 2.Nc3 f5
A22 Two Knights Variation, English; A22 1.c4 e5 2.Nc3 Nf6
A22 Mazedonisch Variation, English 1.c4 e5 2.Nc3 Nf6 3.f4
A22 Bremen; Carls Variation, English 1.c4 e5 2.Nc3 Nf6 3.g3
A22 Kapengut; Smyslov; Modern V, English 1.c4 e5 2.Nc3 Nf6 3.g3 Bb4
A22 Bellon Gambit, English 1.c4 e5 2.Nc3 Nf6 3.Nf3 e4 4.Ng5 b5
A22 Erbenheimer Gambit, English 1.c4 e5 2.Nc3 Nf6 3.Nf3 e4 4.Ng5 Ng4
A23 Keres Variation, English; A23 1.c4 e5 2.Nc3 Nf6 3.g3 c6
A23 Reversed Dragon, English 1.c4 e5 2.Nc3 Nf6 3.g3 d5
A24 Fianchetto Lines, Two Knights Variation, English; A24 1.c4 e5 2.Nc3 Nf6 3.g3 g6
A24 Prickly Pawn Pass System, English 1.c4 e5 2.Nc3 Nf6 3.g3 g6 4.Bg2 Bg7 5.d3 d6 6.e4 O-O
7.Nge2 c6 8.O-O a6
A25 Reversed Closed Sicilian, English; A25 1.c4 e5 2.Nc3 Nc6
A25 Troger Variation, English 1.c4 e5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Be6
A25 Taimanov Variation, English 1.c4 e5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7
A25 Hungarian Attack, English 1.c4 e5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 4.Rb1
A25 Closed System, Full Symmetry, King's English 1.c4 e5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.d3 d6
A25 Botvinnik System, King's English 1.c4 e5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.d3 d6 6.e4
A25 Bremen-Hort Variation, English 1.c4 e5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.e3 d6 6.Nge2 Be6
A25 Botvinnik Variation, English 1.c4 e5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.e4
A26 Closed System, King's English; A26 1.c4 e5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.d3
A27 Three Knights System, English; A27 1.c4 e5 2.Nc3 Nc6 3.Nf3
A28 Four Knights Variation, English; A28 1.c4 e5 2.Nc3 Nc6 3.Nf3 Nf6
A28 Korchnoi Line, English 1.c4 e5 2.Nc3 Nc6 3.Nf3 Nf6 4.a3
A28 Flexible Line, English 1.c4 e5 2.Nc3 Nc6 3.Nf3 Nf6 4.d3
A28 Bradley Beach Variation, English 1.c4 e5 2.Nc3 Nc6 3.Nf3 Nf6 4.d4 e4
A28 Four Knights Variation, English 1.c4 e5 2.Nc3 Nc6 3.Nf3 Nf6 4.d4 exd4 5.Nxd4Bb4 6.Bg5 h6
7.Bh4 Bxc3+ 8.bxc3 Ne5
A28 Quiet Line, English 1.c4 e5 2.Nc3 Nc6 3.Nf3 Nf6 4.e3
A28 Romanishin Variation, English 1.c4 e5 2.Nc3 Nc6 3.Nf3 Nf6 4.e3 Bb4 5.Qc2 Bxc3
A28 Keene; Stean Variation, English 1.c4 e5 2.Nc3 Nc6 3.Nf3 Nf6 4.e3 Bb4 5.Qc2 O-O 6.Nd5
Re8 7.Qf5
A28 Botvinnik Line, English 1.c4 e5 2.Nc3 Nc6 3.Nf3 Nf6 4.e4
A29 Fianchetto Line, Four Knights English; A29 1.c4 e5 2.Nc3 Nc6 3.Nf3 Nf6 4.g3
A30 Symmetrical Defense, English; A30 1.c4 c5
A30 Wing Variation, English 1.c4 c5 2.b4
A30 Napolitano Gambit, Symmetrical English 1.c4 c5 2.Nf3 Nf6 3.b4
A30 Hedgehog Variation, Symmetrical English 1.c4 c5 2.Nf3 Nf6 3.g3 b6 4.Bg2 Bb7 5.O-O e6 6.Nc3 Be7
A30 Double Fianchetto Defense, English 1.c4 c5 2.Nf3 Nf6 3.g3 b6 4.Bg2 Bb7 5.O-O g6
A31 Anti-Benoni Variation, Symmetrical English; A31 1.c4 c5 2.Nf3 Nf6 3.d4
A31 Two Knights Variation, English 1.c4 c5 2.Nf3 Nf6 3.d4 cxd4 4.Nxd4
A32 Spielmann Defense, Symmetrical English; A32 1.c4 c5 2.Nf3 Nf6 3.d4 cxd4 4.Nxd4 e6
A33 A33 1.c4 c5 2.Nf3 Nf6 3.d4 cxd4 4.Nxd4 e6 5.Nc3 Nc6
A33 Geller Variation, Symmetrical English 1.c4 c5 2.Nf3 Nf6 3.d4 cxd4 4.Nxd4 e6 5.Nc3 Nc6 6.g3 Qb6
A34 Normal Variation, Symmetrical English; A34 1.c4 c5 2.Nc3
A34 Fianchetto Variation, Symmetrical English 1.c4 c5 2.Nc3 Nf6 3.g3
A34 Rubinstein Variation, Symmetrical English 1.c4 c5 2.Nc3 Nf6 3.g3 d5 4.cxd5 Nxd5 5.Bg2 Nc7
A34 Asymmetrical Variation, English 1.c4 c5 2.Nc3 Nf6 3.Nf3 d5 4.cxd5 Nxd5
A34 Keres-Parma System, English 1.c4 c5 2.Nc3 Nf6 3.Nf3 e6 4.g3 Nc6
A34 Four Knights Variation, Symmetrical English 1.c4 c5 2.Nc3 Nf6 3.Nf3 Nf6
A35 Two Knights Variation, Symmetrical English; A35 1.c4 c5 2.Nc3 Nc6
A36 Fianchetto Variation, Symmetrical English; A36 1.c4 c5 2.Nc3 Nc6 3.g3
A36 Symmetrical Variation, Symmetrical English 1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7
A36 Botvinnik System Reversed, Symmetrical English 1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.e3 e5
A36 Botvinnik Variation, Symmetrical English 1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.e4
A37 Two Knights Line, Symmetrical English; A37 1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.Nf3
A38 Full Symmetry Line, Symmetrical English; A38 1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.Nf3 Nf6
A38 Double Fianchetto, Symmetrical English 1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.Nf3 Nf6 6.O-O O-O
7.b3
A38 Duchamp Variation, Symmetrical English 1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.Nf3 Nf6 6.O-O O-O 7.d3
A39 Mecking Variation, Symmetrical English; A39 1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.Nf3 Nf6 6.O-O O-O 7.d4
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 1.a4 b6 2.d4 d5 2.Nc3 Nd7
A00 Ware Gambit 1.a4 e5 2.a5 d5 3.e3 f5 4.a6
A00 Polish; Orangutan; Sokolsky; Hunt 1.b4
A00 Birmingham Gambit, Polish 1.b4 c5
A00 Outflank Variation, Polish 1.b4 c6
A00 Schuhler Gambit, Polish 1.b4 c6 2.Bb2 a5 3.b5 cxb5 4.e4
A00 Myers Variation, Polish 1.b4 d5 2.Bb2 c6 3.a4
A00 Bugayev Attack, Polish 1.b4 e5 2.a3
A00 Wolferts Gambit, Polish 1.b4 e5 2.Bb2 c5
A00 Schiffler-Sokolsky; Tartakower Gambit 1.b4 e5 2.Bb2 f6 3.e4 Bxb4
A00 Brinckmann Variation, Polish 1.b4 e5 2.Bb2 f6 3.e4 Bxb4 4.Bc4 Nc6 5.f4 Qe7 6.f5 g6
A00 Bucker Defense, Polish 1.b4 Na6
A00 Grigorian Variation, Polish 1.b4 Nc6
A00 Polish Spike 1.b4 Nf6 2.Bb2 g6 3.g4
A00 Karniewski; Tubingen Variation, Polish 1.b4 Nh6
A00 Saragossa; Hempel's Opening 1.c3
A00 Hanham; Hayward 1.c3 e5 2.Qc2
A00 Mieses; Valencia; Venezuelan Opening 1.d3
A00 Venezolana 1.d3 c5 2.Nc3 Nc6 3.g3
A00 Reversed Rat 1.d3 e5
A00 Spike Deferred; Myers Spike Attack 1.d3 g6 2.g4
A00 Keoni-Hiva Gambit 1.e3 d5 2.Nc3 Nf6 3.a3 e5 4.f4 exf4 5.Nf3
A00 Van't Kruijs Opening 1.e3 e5
A00 Bouncing Bishop Variation 1.e3 e5 2.Bc4 b5 3.Bb3
A00 Amsterdam Attack 1.e3 e5 2.c4 d6 3.Nc3 Nc6 4.b3 Nf6
A00 Ekolu Variation 1.e3 e5 2.Nc3 d5 3.f4 exf4 4.Nf3
A00 Alua Variation 1.e3 e5 2.Nc3 Nc6 3.f4 exf4 4.Nf3
A00 Akahi Variation 1.e3 e5 2.Nc3 Nf6 3.f4 exf4 4.Nf3
A00 Barnes; Gedult-Gunderam; Walkerling 1.f3
A00 King's Head Opening 1.f3 e5 2.e4
A00 Hammerschlag; Pork Chop Opening 1.f3 e5 2.Kf2
A00 Benko; Barczay; Bilek; Hungarian 1.g3
A00 Gambit 59 1.g3 d5 2.Bg2 e5 3.b4
A00 Regan Variation 1.g3 d5 2.Bg2 e5 3.d4
A00 Reversed Alekhine 1.g3 e5 2.Nf3
A00 Lasker Simul Special 1.g3 h5
A00 Grob; Ahlhausen; Colibri; Fric; Genoa; Spike 1.g4
A00 Grob Gambit 1.g4 d5 2.Bg2 Bxg4
A00 Romford Counter-Gambit, Grob 1.g4 d5 2.Bg2 Bxg4 3.c4 d4
A00 Spike, Grob 1.g4 d5 2.Bg2 c6 3.g5
A00 Short Spike, Grob 1.g4 d5 2.Bg2 c6 3.h3
A00 Zilbermints Gambit, Grob 1.g4 d5 2.e4
A00 Keene Defense, Grob 1.g4 d5 2.h3 e5
A00 Hurst Attack, Grob 1.g4 e5 2.Bg2 d5 3.c4
A00 Alessi Gambit, Grob 1.g4 f5
A00 Double Grob 1.g4 g5
A00 Spike Deferred 1.g4 g6 2.d3
A00 Bucker Defense, Grob 1.g4 Nh6
A00 Clemenz Opening 1.h3
A00 Kadas Opening 1.h4
A00 Despres Opening 1.h4
A00 Koola-Koola 1.h4 a5
A00 Wulumulu 1.h4 e5 2.d4
A00 Durkin's Opening; Sodium Attack 1.Na3
A00 Dunst; Heinrichsen; Will Bull; Kotrc 1.Nc3
A00 St. George Defense, Dunst 1.Nc3 a6
A00 Novosibirsk Variation, Dunst 1.Nc3 c5 2.d4 cxd4 3.Qxd4 Nc6 4.Qh4
A00 Twyble Attack, Dunst 1.Nc3 c5 2.Rb1
A00 Dunst Gambit 1.Nc3 d5 2.e4 dxe4 3.d3
A00 Pseudo-Diemer Gambit, Dunst 1.Nc3 d5 2.e4 dxe4 3.f3 exf3 4.Qxf3
A00 Amazon, Dunst 1.Nc3 d5 2.e4 dxe4 3.Nxe4 Qd5
A00 Reversed Nimzovich 1.Nc3 e5
A00 Battambang, Dunst 1.Nc3 e5 2.a3
A00 Irish Attack; Polish Attack 1.Nc3 e5 2.f4
A00 Napoleon Attack, Dunst 1.Nc3 e5 2.Nf3
A00 Glasscoe Gambit, Dunst 1.Nc3 f5 2.g4
A00 Anti-Pirc Variation, Dunst 1.Nc3 g6 2.h4
A00 Tubingen Gambit, Dunst 1.Nc3 Nf6 2.g4
A00 Amar; Paris Opening 1.Nh3
A00 Drunken Knight Opening 1.Nh3
A00 Krazy Kat 1.Nh3 e5 2.f3 d5 3.Nf2
A01 Larsen; Queen's Fianchetto; Nimzo-Larsen Attack A01 1.b3
A01 Symmetrical Variation, Larsen 1.b3 b6
A01 English Variation, Larsen 1.b3 c5
A01 Classical Variation, Larsen 1.b3 d5
A01 Modern Variation, Larsen 1.b3 e5
A01 Ringelbach Gambit, Larsen 1.b3 e5 2.Bb2 f5 3.e4
A01 Paschmann Gambit, Larsen 1.b3 e5 2.Bb2 Nc6 3.f4
A01 Dutch Variation, Larsen 1.b3 f5
A01 Indian Variation, Larsen 1.b3 Nf6
A01 Spike Variation, Larsen 1.b3 Nf6 2.Bb2 g6 3.g4
A02 Bird's Opening; Dutch Attack 1.f4
A02 From's Gambit, Bird 1.f4 e5
A02 Canard Formation; Double Duck 1.f4 f5 2.d4 d5
A02 Pawn Thrust Attack, Bird 1.f4 f5 2.d4 d5
A02 Swiss Gambit, Bird 1.f4 f5 2.e4 fxe4 3.Nc3 Nf6 4.g4
A02 Hobbs Gambit, Bird 1.f4 g5
A02 Batavo Polish Attack, Bird 1.f4 Nf6 2.Nf3 g6 3.b4
A03 A03 1.f4 d5
A03 Sturm; Mujannah 1.f4 d5 2.c4
A03 Prokofiev Gambit, Bird 1.f4 d5 2.e4 dxe4 3.d3
A03 Williams Gambit, Bird 1.f4 d5 2.e4 dxe4 3.Nc3
A03 Horsefly Defense, Bird 1.f4 Nh6
A04 Reti; Zukertort; A04 1.Nf3
A04 Wade Defense 1.Nf3 d6
A04 Lisitsin Gambit; Polish Gambit 1.Nf3 f5 2.e4
A04 Rydel-Bloodgood Gambit 1.Nf3 f5 2.e4 exf4 3.Ne5
A04 Polish G; Dalesio G; Pirc-Lisitsin G 1.Nf3 f5 2.e4 fxe4 3.Ng5
A04 Herrstrom Gambit, Reti 1.Nf3 g5
A04 Oberndorfer Gambit; Reti 1.Nf3 g5
A04 Lessing Defense 1.Nf3 Nc6
A05 King's Indian Attack; Reti; Zukertort; A05 1.Nf3 Nf6
A06 A06 1.Nf3 d5
A06 Nimzovich Opening, Reti 1.Nf3 d5 2.b3
A06 Bloodgood Gambit, Reti 1.Nf3 d5 2.b3 c5 3.e4 dxe4 4.Ne5
A06 Santasiere's Folly, Reti 1.Nf3 d5 2.b4
A06 Old Indian Attack 1.Nf3 d5 2.d3
A06 Tennison G; Lemberg G; Abonyi G 1.Nf3 d5 2.e4
A06 Reversed Mexican Defense, Reti 1.Nf3 d5 2.Nc3
A06 Ampel Variation, Reti 1.Nf3 d5 2.Rg1
A06 Improved Lisitsin G, Reti 1.Nf3 f5 2.d3
A07 Barcza Opening, Reti; A07 1.Nf3 d5 2.g3
A08 A08 1.Nf3 d5 2.g3 c5
A09 Reti; Landstrasser G; Wolf G; A09 1.Nf3 d5 2.c4
A09 London V; New York V, Reti 1.Nf3 d5 2.c4 c6 3.b3 Nf6 4.Bg2 e6 5.Bb2 Nbd7
A09 Benoni Reversed; Wing Blumenfeld 1.Nf3 d5 2.c4 d4
A09 Reti Polonaise 1.Nf3 d5 2.c4 d4 3.b4
A09 Penguin Variation, Reti 1.Nf3 d5 2.c4 d4 3.Rg1
A09 Reti Gambit Accepted 1.Nf3 d5 2.c4 dxc4
A09 Neo-Catalan, Reti 1.Nf3 d5 2.c4 e6 3.g3
A10 English Opening; A10 1.c4
A10 Halibut Gambit, English 1.c4 b5
A10 Anglo Scandanavian Defense, English 1.c4 d5
A10 Loehn Gambit, English 1.c4 d5 2.cxd5 e6
A10 Schulz Gambit, English 1.c4 d5 2.cxd5 Nf6
A10 Malvinas Variation, English 1.c4 d5 2.cxd5 Qxd5 3.Nc3 Qa5
A10 Anglo-Dutch Defense 1.c4 f5
A10 Anglo-Polish Dutch 1.c4 f5 2.b4
A10 Hickmann Gambit, English 1.c4 f5 2.e4
A10 Hickmann Gambit, English 1.c4 f5 2.e4 fxe4 3.d3
A10 Porcupine Variation, English 1.c4 f5 2.e4 fxe4 3.Nc3 Nf6 4.g4
A10 Wade Gambit, English 1.c4 f5 2.g4
A10 English Spike 1.c4 f5 2.g4
A10 Chabanon Gambit, English 1.c4 f5 2.Nf3 d6 3.e4
A10 Myers Defense, English 1.c4 g5 2.d4 Bg7
A10 Zilbermints Gambit, English 1.c4 g5 2.d4 e5
A10 Great Snake, English 1.c4 g6
A10 Adorjan System, English 1.c4 g6 2.e4 e5
A10 Beefeater 1.c4 g6 2.Nc3 Bg7 3.d4 c5 4.d5 Bxc3 5.bxc3 f5
A10 Anglo-Lithuanian Variation, English 1.c4 Nc6
A11 Anglo-Slav, English; A11 1.c4 c6
A12 A12 1.c4 c6 2.Nf3 d5 3.b3
A12 Bled Variation, English 1.c4 c6 2.Nf3 d5 3.b3 Nf6 4.g3 g6
A13 Agincourt; Kurajica Defense, English; A13 1.c4 e6
A13 English Defense 1.c4 e6 2.d4 b6
A13 King's Knight Variation, English 1.c4 e6 2.Nf3 d5
A13 Wimpy System, English 1.c4 e6 2.Nf3 d5 3.b3 Nf6 4.Bb2 c5 e3
A13 Afincourt Variation, English 1.c4 e6 2.Nf3 d5 3.g3
A13 Kurajica Defense, English 1.c4 e6 2.Nf3 d5 3.g3 c6
A13 Neo Catalan, English 1.c4 e6 2.Nf3 d5 3.g3 Nf6
A13 Neo Catalan Accepted, English 1.c4 e6 2.Nf3 d5 3.g3 Nf6 4.Bg2 dxc4
A13 Romanishin Gambit, English 1.c4 e6 2.Nf3 Nf6 3.g3 a6 4.Bg2 b5
A14 A14 1.c4 e6 2.Nf3 d5 3.g3 Nf6 4.Bg2 Be7
A14 Neo Catalan Declined, English 1.c4 e6 2.Nf3 d5 3.g3 Nf6 4.Bg2 Be7 5.O-O
A14 Keres Defense, English 1.c4 e6 2.Nf3 d5 3.g3 Nf6 4.Bg2 Be7 5.O-O c5
6.cxd5 Nxd5 7.Nc3 Nc6
A15 Anglo System, English; A15 1.c4 Nf6
A15 Mikenas-Carls Variation, English 1.c4 Nf6
A15 English Orangutan 1.c4 Nf6 2.b4
A15 Shirazi Shove 1.c4 Nf6 2.g3 h5
A15 King's Knight Variation, English 1.c4 Nf6 2.Nf3
A15 Romanishin Variation, English 1.c4 Nf6 2.Nf3 e6 3.g3 a6
A16 A16 1.c4 Nf6 2.Nc3
A16 Golombek Defense, English; Anti English 1.c4 Nf6 2.Nc3 d5
A16 Czech Variation, English 1.c4 Nf6 2.Nc3 d5 3.cxd5 Nxd5 4.g3 g6 5.Bg2 Nb6
A16 Korchnoi's Variation, English 1.c4 Nf6 2.Nc3 d5 3.cxd5 Nxd5 4.Nf3 g6 5.g3 Bg7 6.Bg2 e5
A16 Stein Attack, English 1.c4 Nf6 2.Nc3 d5 3.cxd5 Nxd5 4.Nf3 g6 5.Qa4+
A16 Anti-anti-grunfeld 1.c4 Nf6 2.Nc3 g6 3.Nf3 Bg7 4.e4
A17 Smyslov Defense, English 1.c4 Nf6 2.Nc3 d5 3.cxd5 Nxd5 4.g3 g6 5.Bg2 Nxc3
A17 Hegehog System, Anglo-Indian English; A17 1.c4 Nf6 2.Nc3 e6
A17 Nimzo-English Opening 1.c4 Nf6 2.Nc3 e6 3.Nf3 Bb4
A17 Zviagintsev-Krasenkov Attack, English 1.c4 Nf6 2.Nc3 e6 3.Nf3 Bb4 4.g4
A18 Flohr-Mikenas-Carls Variation, English; A18 1.c4 Nf6 2.Nc3 e6 3.e4
A18 Kevitz Defense, English 1.c4 Nf6 2.Nc3 e6 3.e4 Nc6
A18 Queen's Indian Formation, English 1.c4 Nf6 2.Nc3 e6 3.Nf3 b6
A19 Floh-Mikenas-Carls Variation, English; A19 1.c4 Nf6 2.Nc3 e6 3.e4 c5
A19 Nei Gambit, English 1.c4 Nf6 2.Nc3 e6 3.e4 c5 4.e5 Ng8
A20 King's English; A20 1.c4 e5
A20 Kahiko-Hula Gambit, English 1.c4 e5 2.e3 Nf6 4.f4 exf4 4.Nf3
A20 Double Whammy, English 1.c4 e5 2.f4
A20 Drill Variation, English 1.c4 e5 2.g3 h5
A20 Nimzovich Variation, English 1.c4 e5 2.Nf3
A20 Nimzovich-Flohr Variation, English 1.c4 e5 2.Nf3 e4
A20 English Queen 1.c4 e5 2.Qa4
A21 Reversed Sicilian, English; A21 1.c4 e5 2.Nc3
A21 Kramnik-Shirov Variation, English 1.c4 e5 2.Nc3 Bb4
A21 Troger Variation, English 1.c4 e5 2.Nc3 d6 3.g3 Be6 4.Bg2 Nc6
A21 Keres Defense, English 1.c4 e5 2.Nc3 d6 3.g3 c6
A21 General Variation, King's English 1.c4 e5 2.Nc3 d6 3.Nf3
A21 Smyslov Variation, English 1.c4 e5 2.Nc3 d6 3.Nf3 Bg4
A21 Anglo-Dutch 1.c4 e5 2.Nc3 f5
A22 Two Knights Variation, English; A22 1.c4 e5 2.Nc3 Nf6
A22 Mazedonisch Variation, English 1.c4 e5 2.Nc3 Nf6 3.f4
A22 Bremen; Carls Variation, English 1.c4 e5 2.Nc3 Nf6 3.g3
A22 Kapengut; Smyslov; Modern V, English 1.c4 e5 2.Nc3 Nf6 3.g3 Bb4
A22 Bellon Gambit, English 1.c4 e5 2.Nc3 Nf6 3.Nf3 e4 4.Ng5 b5
A22 Erbenheimer Gambit, English 1.c4 e5 2.Nc3 Nf6 3.Nf3 e4 4.Ng5 Ng4
A23 Keres Variation, English; A23 1.c4 e5 2.Nc3 Nf6 3.g3 c6
A23 Reversed Dragon, English 1.c4 e5 2.Nc3 Nf6 3.g3 d5
A24 Fianchetto Lines, Two Knights Variation, English; A24 1.c4 e5 2.Nc3 Nf6 3.g3 g6
A24 Prickly Pawn Pass System, English 1.c4 e5 2.Nc3 Nf6 3.g3 g6 4.Bg2 Bg7 5.d3 d6 6.e4 O-O
7.Nge2 c6 8.O-O a6
A25 Reversed Closed Sicilian, English; A25 1.c4 e5 2.Nc3 Nc6
A25 Troger Variation, English 1.c4 e5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Be6
A25 Taimanov Variation, English 1.c4 e5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7
A25 Hungarian Attack, English 1.c4 e5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 4.Rb1
A25 Closed System, Full Symmetry, King's English 1.c4 e5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.d3 d6
A25 Botvinnik System, King's English 1.c4 e5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.d3 d6 6.e4
A25 Bremen-Hort Variation, English 1.c4 e5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.e3 d6 6.Nge2 Be6
A25 Botvinnik Variation, English 1.c4 e5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.e4
A26 Closed System, King's English; A26 1.c4 e5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.d3
A27 Three Knights System, English; A27 1.c4 e5 2.Nc3 Nc6 3.Nf3
A28 Four Knights Variation, English; A28 1.c4 e5 2.Nc3 Nc6 3.Nf3 Nf6
A28 Korchnoi Line, English 1.c4 e5 2.Nc3 Nc6 3.Nf3 Nf6 4.a3
A28 Flexible Line, English 1.c4 e5 2.Nc3 Nc6 3.Nf3 Nf6 4.d3
A28 Bradley Beach Variation, English 1.c4 e5 2.Nc3 Nc6 3.Nf3 Nf6 4.d4 e4
A28 Four Knights Variation, English 1.c4 e5 2.Nc3 Nc6 3.Nf3 Nf6 4.d4 exd4 5.Nxd4Bb4 6.Bg5 h6
7.Bh4 Bxc3+ 8.bxc3 Ne5
A28 Quiet Line, English 1.c4 e5 2.Nc3 Nc6 3.Nf3 Nf6 4.e3
A28 Romanishin Variation, English 1.c4 e5 2.Nc3 Nc6 3.Nf3 Nf6 4.e3 Bb4 5.Qc2 Bxc3
A28 Keene; Stean Variation, English 1.c4 e5 2.Nc3 Nc6 3.Nf3 Nf6 4.e3 Bb4 5.Qc2 O-O 6.Nd5
Re8 7.Qf5
A28 Botvinnik Line, English 1.c4 e5 2.Nc3 Nc6 3.Nf3 Nf6 4.e4
A29 Fianchetto Line, Four Knights English; A29 1.c4 e5 2.Nc3 Nc6 3.Nf3 Nf6 4.g3
A30 Symmetrical Defense, English; A30 1.c4 c5
A30 Wing Variation, English 1.c4 c5 2.b4
A30 Napolitano Gambit, Symmetrical English 1.c4 c5 2.Nf3 Nf6 3.b4
A30 Hedgehog Variation, Symmetrical English 1.c4 c5 2.Nf3 Nf6 3.g3 b6 4.Bg2 Bb7 5.O-O e6 6.Nc3 Be7
A30 Double Fianchetto Defense, English 1.c4 c5 2.Nf3 Nf6 3.g3 b6 4.Bg2 Bb7 5.O-O g6
A31 Anti-Benoni Variation, Symmetrical English; A31 1.c4 c5 2.Nf3 Nf6 3.d4
A31 Two Knights Variation, English 1.c4 c5 2.Nf3 Nf6 3.d4 cxd4 4.Nxd4
A32 Spielmann Defense, Symmetrical English; A32 1.c4 c5 2.Nf3 Nf6 3.d4 cxd4 4.Nxd4 e6
A33 A33 1.c4 c5 2.Nf3 Nf6 3.d4 cxd4 4.Nxd4 e6 5.Nc3 Nc6
A33 Geller Variation, Symmetrical English 1.c4 c5 2.Nf3 Nf6 3.d4 cxd4 4.Nxd4 e6 5.Nc3 Nc6 6.g3 Qb6
A34 Normal Variation, Symmetrical English; A34 1.c4 c5 2.Nc3
A34 Fianchetto Variation, Symmetrical English 1.c4 c5 2.Nc3 Nf6 3.g3
A34 Rubinstein Variation, Symmetrical English 1.c4 c5 2.Nc3 Nf6 3.g3 d5 4.cxd5 Nxd5 5.Bg2 Nc7
A34 Asymmetrical Variation, English 1.c4 c5 2.Nc3 Nf6 3.Nf3 d5 4.cxd5 Nxd5
A34 Keres-Parma System, English 1.c4 c5 2.Nc3 Nf6 3.Nf3 e6 4.g3 Nc6
A34 Four Knights Variation, Symmetrical English 1.c4 c5 2.Nc3 Nf6 3.Nf3 Nf6
A35 Two Knights Variation, Symmetrical English; A35 1.c4 c5 2.Nc3 Nc6
A36 Fianchetto Variation, Symmetrical English; A36 1.c4 c5 2.Nc3 Nc6 3.g3
A36 Symmetrical Variation, Symmetrical English 1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7
A36 Botvinnik System Reversed, Symmetrical English 1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.e3 e5
A36 Botvinnik Variation, Symmetrical English 1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.e4
A37 Two Knights Line, Symmetrical English; A37 1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.Nf3
A38 Full Symmetry Line, Symmetrical English; A38 1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.Nf3 Nf6
A38 Double Fianchetto, Symmetrical English 1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.Nf3 Nf6 6.O-O O-O
7.b3
A38 Duchamp Variation, Symmetrical English 1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.Nf3 Nf6 6.O-O O-O 7.d3
A39 Mecking Variation, Symmetrical English; A39 1.c4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.Nf3 Nf6 6.O-O O-O 7.d4