ChessAlgo Opening Library

Chess Openings

Explore ChessAlgo opening guides by family. Each card links to a full page with board replay, move order, ideas, and FAQs.

All Openings A Flank Openings B Semi-Open Games C Open Games D Closed & Semi-Closed Games E Indian Defenses
ECO C20 Array King's Pawn Game Open Games Moves: 1. e4 e5 2 moves Open guide → ECO C50 Array Italian Game Open Games Moves: 1. e4 e5 2. Nf3 Nc6 3. Bc4 5 moves Open guide → ECO C60 Array Ruy Lopez Open Games Moves: 1. e4 e5 2. Nf3 Nc6 3. Bb5 5 moves Open guide → ECO C65 Array Ruy Lopez: Berlin Defense Open Games Moves: 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 6 moves Open guide → ECO C80 Array Ruy Lopez: Open Defense Open Games Moves: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 10 moves Open guide → ECO C84 Array Ruy Lopez: Closed Defense Open Games Moves: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 10 moves Open guide → ECO C89 Array Ruy Lopez: Marshall Attack Open Games Moves: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3 d5 16 moves Open guide → ECO C44 Array Scotch Game Open Games Moves: 1. e4 e5 2. Nf3 Nc6 3. d4 5 moves Open guide → ECO C45 Array Scotch Game: Classical Variation Open Games Moves: 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Bc5 8 moves Open guide → ECO C41 Array Philidor Defense Open Games Moves: 1. e4 e5 2. Nf3 d6 4 moves Open guide → ECO C42 Array Petrov Defense Open Games Moves: 1. e4 e5 2. Nf3 Nf6 4 moves Open guide → ECO C30 Array King's Gambit Open Games Moves: 1. e4 e5 2. f4 3 moves Open guide → ECO C33 Array King's Gambit Accepted Open Games Moves: 1. e4 e5 2. f4 exf4 4 moves Open guide → ECO C24 Array Bishop's Opening Open Games Moves: 1. e4 e5 2. Bc4 3 moves Open guide → ECO C25 Array Vienna Game Open Games Moves: 1. e4 e5 2. Nc3 3 moves Open guide → ECO C46 Array Three Knights Game Open Games Moves: 1. e4 e5 2. Nf3 Nc6 3. Nc3 5 moves Open guide → ECO C55 Array Italian: Two Knights Defense Open Games Moves: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 6 moves Open guide → ECO C57 Array Italian: Fried Liver Attack Open Games Moves: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Nxd5 6. Nxf7 11 moves Open guide → ECO C51 Array Italian: Evans Gambit Open Games Moves: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. b4 7 moves Open guide → ECO C00 Array French Defense Open Games Moves: 1. e4 e6 2 moves Open guide → ECO C02 Array French Defense: Advance Variation Open Games Moves: 1. e4 e6 2. d4 d5 3. e5 5 moves Open guide → ECO C11 Array French Defense: Classical Variation Open Games Moves: 1. e4 e6 2. d4 d5 3. Nc3 Nf6 6 moves Open guide → ECO C14 Array French Defense: Classical, Steinitz Open Games Moves: 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. e5 9 moves Open guide → ECO B20 Array Sicilian Defense Semi-Open Games Moves: 1. e4 c5 2 moves Open guide → ECO B22 Array Sicilian Defense: Alapin Variation Semi-Open Games Moves: 1. e4 c5 2. c3 3 moves Open guide → ECO B23 Array Sicilian Defense: Closed Variation Semi-Open Games Moves: 1. e4 c5 2. Nc3 3 moves Open guide → ECO B21 Array Sicilian: Grand Prix Attack Semi-Open Games Moves: 1. e4 c5 2. Nc3 Nc6 3. f4 5 moves Open guide → ECO B70 Array Sicilian: Dragon Variation Semi-Open Games Moves: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 10 moves Open guide → ECO B90 Array Sicilian: Najdorf Variation Semi-Open Games Moves: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 10 moves Open guide → ECO B80 Array Sicilian: Scheveningen Variation Semi-Open Games Moves: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 10 moves Open guide → ECO B96 Array Sicilian: Najdorf, Poisoned Pawn Semi-Open Games Moves: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Qb6 14 moves Open guide → ECO B10 Array Caro-Kann Defense Semi-Open Games Moves: 1. e4 c6 2 moves Open guide → ECO B12 Array Caro-Kann: Advance Variation Semi-Open Games Moves: 1. e4 c6 2. d4 d5 3. e5 5 moves Open guide → ECO B13 Array Caro-Kann: Exchange Variation Semi-Open Games Moves: 1. e4 c6 2. d4 d5 3. exd5 cxd5 6 moves Open guide → ECO B17 Array Caro-Kann: Steinitz Variation Semi-Open Games Moves: 1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nd7 8 moves Open guide → ECO B01 Array Scandinavian Defense Semi-Open Games Moves: 1. e4 d5 2 moves Open guide → ECO B06 Array Modern Defense Semi-Open Games Moves: 1. e4 g6 2 moves Open guide → ECO B07 Array Pirc Defense Semi-Open Games Moves: 1. e4 d6 2. d4 Nf6 3. Nc3 g6 6 moves Open guide → ECO B09 Array Pirc Defense: Austrian Attack Semi-Open Games Moves: 1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. f4 7 moves Open guide → ECO B00 Array Nimzowitsch Defense Semi-Open Games Moves: 1. e4 Nc6 2 moves Open guide → ECO D00 Array Queen's Pawn Game Closed & Semi-Closed Games Moves: 1. d4 d5 2 moves Open guide → ECO D02 Array London System Closed & Semi-Closed Games Moves: 1. d4 d5 2. Nf3 Nf6 3. Bf4 5 moves Open guide → ECO D05 Array Colle System Closed & Semi-Closed Games Moves: 1. d4 d5 2. Nf3 Nf6 3. e3 5 moves Open guide → ECO D01 Array Richter-Veresov Attack Closed & Semi-Closed Games Moves: 1. d4 d5 2. Nc3 Nf6 3. Bg5 5 moves Open guide → ECO D00 Array Blackmar-Diemer Gambit Closed & Semi-Closed Games Moves: 1. d4 d5 2. e4 dxe4 3. Nc3 Nf6 4. f3 7 moves Open guide → ECO D06 Array Queen's Gambit Closed & Semi-Closed Games Moves: 1. d4 d5 2. c4 3 moves Open guide → ECO D20 Array Queen's Gambit Accepted Closed & Semi-Closed Games Moves: 1. d4 d5 2. c4 dxc4 4 moves Open guide → ECO D30 Array Queen's Gambit Declined Closed & Semi-Closed Games Moves: 1. d4 d5 2. c4 e6 4 moves Open guide → ECO D35 Array QGD: Exchange Variation Closed & Semi-Closed Games Moves: 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. cxd5 exd5 8 moves Open guide → ECO D10 Array Slav Defense Closed & Semi-Closed Games Moves: 1. d4 d5 2. c4 c6 4 moves Open guide → ECO D43 Array Semi-Slav Defense Closed & Semi-Closed Games Moves: 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 8 moves Open guide → ECO D44 Array Semi-Slav: Anti-Meran Gambit Closed & Semi-Closed Games Moves: 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. Bg5 dxc4 10 moves Open guide → ECO D70 Array Grünfeld Defense Closed & Semi-Closed Games Moves: 1. d4 Nf6 2. c4 g6 3. Nc3 d5 6 moves Open guide → ECO D85 Array Grünfeld: Exchange Variation Closed & Semi-Closed Games Moves: 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 11 moves Open guide → ECO A45 Array Trompowsky Attack Flank Openings Moves: 1. d4 Nf6 2. Bg5 3 moves Open guide → ECO A46 Array Torre Attack Flank Openings Moves: 1. d4 Nf6 2. Nf3 e6 3. Bg5 5 moves Open guide → ECO E10 Array Indian Game Indian Defenses Moves: 1. d4 Nf6 2 moves Open guide → ECO E00 Array Catalan Opening Indian Defenses Moves: 1. d4 Nf6 2. c4 e6 3. g3 5 moves Open guide → ECO E20 Array Nimzo-Indian Defense Indian Defenses Moves: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 6 moves Open guide → ECO E32 Array Nimzo-Indian: Classical Variation Indian Defenses Moves: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 7 moves Open guide → ECO E43 Array Nimzo-Indian: Fischer Variation Indian Defenses Moves: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 b6 8 moves Open guide → ECO E12 Array Queen's Indian Defense Indian Defenses Moves: 1. d4 Nf6 2. c4 e6 3. Nf3 b6 6 moves Open guide → ECO E60 Array King's Indian Defense Indian Defenses Moves: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 6 moves Open guide → ECO E62 Array King's Indian: Fianchetto Variation Indian Defenses Moves: 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 7 moves Open guide → ECO E70 Array King's Indian: Four Pawns Attack Indian Defenses Moves: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f4 9 moves Open guide → ECO E80 Array King's Indian: Sämisch Variation Indian Defenses Moves: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. f3 9 moves Open guide → ECO E90 Array King's Indian: Orthodox Variation Indian Defenses Moves: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 11 moves Open guide → ECO A40 Array Dutch Defense Flank Openings Moves: 1. d4 f5 2 moves Open guide → ECO A51 Array Budapest Gambit Flank Openings Moves: 1. d4 Nf6 2. c4 e5 4 moves Open guide → ECO A57 Array Benko Gambit Flank Openings Moves: 1. d4 Nf6 2. c4 c5 3. d5 b5 6 moves Open guide → ECO A10 Array English Opening Flank Openings Moves: 1. c4 1 moves Open guide → ECO A20 Array English Opening: King's English Flank Openings Moves: 1. c4 e5 2 moves Open guide → ECO A13 Array English Opening: Agincourt Defense Flank Openings Moves: 1. c4 e6 2. Nf3 d5 4 moves Open guide → ECO A04 Array Reti Opening Flank Openings Moves: 1. Nf3 1 moves Open guide → ECO A00 Array Bird Opening Flank Openings Moves: 1. f4 1 moves Open guide → ECO A00 Array Polish Opening Flank Openings Moves: 1. b4 1 moves Open guide → ECO C40 Array Latvian Gambit Open Games Moves: 1. e4 e5 2. Nf3 f5 4 moves Open guide → ECO C78 Array Ruy Lopez: Arkhangelsk Variation Open Games Moves: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Bc5 10 moves Open guide → ECO D37 Array QGD: Four Knights Variation Closed & Semi-Closed Games Moves: 1. d4 d5 2. c4 e6 3. Nf3 Nf6 4. Nc3 Nbd7 8 moves Open guide → ECO E46 Array Nimzo-Indian: Reshevsky Variation Indian Defenses Moves: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Nge2 9 moves Open guide → ECO B32 Array Sicilian: Löwenthal Variation Semi-Open Games Moves: 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 e5 8 moves Open guide → ECO E15 Array Queen's Indian: Nimzowitsch Var. Indian Defenses Moves: 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 7 moves Open guide → ECO B02 Array Alekhine Defense Semi-Open Games Moves: 1. e4 Nf6 2 moves Open guide → ECO B04 Array Alekhine Defense: Modern Variation Semi-Open Games Moves: 1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3 7 moves Open guide → ECO B03 Array Alekhine Defense: Four Pawns Attack Semi-Open Games Moves: 1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. c4 Nb6 5. f4 9 moves Open guide → ECO B03 Array Alekhine Defense: Exchange Variation Semi-Open Games Moves: 1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. c4 Nb6 5. exd6 9 moves Open guide → ECO A56 Array Benoni Defense Flank Openings Moves: 1. d4 Nf6 2. c4 c5 4 moves Open guide → ECO A60 Array Modern Benoni Flank Openings Moves: 1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 9 moves Open guide → ECO C47 Array Four Knights Game Open Games Moves: 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 6 moves Open guide → ECO C48 Array Four Knights Game: Spanish Variation Open Games Moves: 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 7 moves Open guide → ECO C47 Array Four Knights Game: Scotch Variation Open Games Moves: 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. d4 7 moves Open guide → ECO D32 Array Tarrasch Defense Closed & Semi-Closed Games Moves: 1. d4 d5 2. c4 e6 3. Nc3 c5 6 moves Open guide → ECO E11 Array Bogo-Indian Defense Indian Defenses Moves: 1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ 6 moves Open guide → ECO A05 Array King's Indian Attack Flank Openings Moves: 1. Nf3 Nf6 2. g3 3 moves Open guide → ECO C20 Array Center Game Open Games Moves: 1. e4 e5 2. d4 3 moves Open guide → ECO C44 Array Ponziani Opening Open Games Moves: 1. e4 e5 2. Nf3 Nc6 3. c3 5 moves Open guide → ECO C50 Array Italian Game: Giuoco Piano Open Games Moves: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 6 moves Open guide → ECO C50 Array Italian Game: Giuoco Pianissimo Open Games Moves: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. d3 7 moves Open guide → ECO C50 Array Italian Game: Hungarian Defense Open Games Moves: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Be7 6 moves Open guide → ECO A01 Array Nimzo-Larsen Attack Flank Openings Moves: 1. b3 1 moves Open guide → ECO A00 Array Van Geet Opening Flank Openings Moves: 1. Nc3 1 moves Open guide → ECO A41 Array Old Indian Defense Flank Openings Moves: 1. d4 d6 2. c4 3 moves Open guide → ECO A54 Array Old Indian Defense: Ukrainian Variation Flank Openings Moves: 1. d4 Nf6 2. c4 d6 3. Nc3 e5 6 moves Open guide → ECO A30 Array English Opening: Symmetrical Variation Flank Openings Moves: 1. c4 c5 2 moves Open guide → ECO A28 Array English Opening: Four Knights System Flank Openings Moves: 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 6 moves Open guide → ECO A22 Array English Opening: Carls-Bremen System Flank Openings Moves: 1. c4 e5 2. Nc3 Nf6 3. g3 5 moves Open guide → ECO B21 Array Sicilian Defense: Smith-Morra Gambit Semi-Open Games Moves: 1. e4 c5 2. d4 cxd4 3. c3 5 moves Open guide → ECO B45 Array Sicilian Defense: Four Knights Variation Semi-Open Games Moves: 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Nf6 10 moves Open guide → ECO B30 Array Sicilian Defense: Old Sicilian Semi-Open Games Moves: 1. e4 c5 2. Nf3 Nc6 4 moves Open guide → ECO C03 Array French Defense: Tarrasch Variation Open Games Moves: 1. e4 e6 2. d4 d5 3. Nd2 5 moves Open guide → ECO C15 Array French Defense: Winawer Variation Open Games Moves: 1. e4 e6 2. d4 d5 3. Nc3 Bb4 6 moves Open guide → ECO C01 Array French Defense: Exchange Variation Open Games Moves: 1. e4 e6 2. d4 d5 3. exd5 exd5 6 moves Open guide → ECO B18 Array Caro-Kann Defense: Classical Variation Semi-Open Games Moves: 1. e4 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Bf5 8 moves Open guide → ECO B10 Array Caro-Kann Defense: Two Knights Attack Semi-Open Games Moves: 1. e4 c6 2. Nc3 d5 3. Nf3 5 moves Open guide → ECO C68 Array Ruy Lopez: Exchange Variation Open Games Moves: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6 5. O-O 9 moves Open guide → ECO C62 Array Ruy Lopez: Steinitz Defense Open Games Moves: 1. e4 e5 2. Nf3 Nc6 3. Bb5 d6 6 moves Open guide → ECO D30 Array Queen's Gambit Declined: Vienna Variation Closed & Semi-Closed Games Moves: 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Bg5 Bb4+ 8 moves Open guide → ECO D35 Array Queen's Gambit Declined: Harrwitz Attack Closed & Semi-Closed Games Moves: 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bf4 7 moves Open guide → ECO D10 Array Slav Defense: Exchange Variation Closed & Semi-Closed Games Moves: 1. d4 d5 2. c4 c6 3. cxd5 cxd5 6 moves Open guide → ECO D15 Array Slav Defense: Three Knights Variation Closed & Semi-Closed Games Moves: 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 7 moves Open guide → ECO E73 Array King's Indian Defense: Averbakh Variation Indian Defenses Moves: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. Bg5 11 moves Open guide → ECO E92 Array King's Indian Defense: Petrosian Variation Indian Defenses Moves: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. d5 13 moves Open guide → ECO E94 Array King's Indian Defense: Classical Variation Indian Defenses Moves: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O 13 moves Open guide → ECO E12 Array Queen's Indian Defense: Kasparov Variation Indian Defenses Moves: 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. Nc3 7 moves Open guide → ECO E15 Array Queen's Indian Defense: Fianchetto Variation Indian Defenses Moves: 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Ba6 5. b3 9 moves Open guide → ECO E30 Array Nimzo-Indian Defense: Leningrad Variation Indian Defenses Moves: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Bg5 7 moves Open guide → ECO E18 Array Nimzo-Indian Defense: Saemisch Variation Indian Defenses Moves: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. f3 7 moves Open guide → ECO D90 Array Grünfeld Defense: Three Knights Variation Closed & Semi-Closed Games Moves: 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 7 moves Open guide → ECO D96 Array Grünfeld Defense: Russian Variation Closed & Semi-Closed Games Moves: 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qb3 9 moves Open guide → ECO E02 Array Catalan Opening: Open Defense Indian Defenses Moves: 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 dxc4 8 moves Open guide → ECO A86 Array Dutch Defense: Leningrad Variation Flank Openings Moves: 1. d4 f5 2. c4 Nf6 3. g3 g6 6 moves Open guide → ECO A92 Array Dutch Defense: Stonewall Variation Flank Openings Moves: 1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 6. O-O d5 12 moves Open guide → ECO C29 Array Vienna Game: Vienna Gambit Open Games Moves: 1. e4 e5 2. Nc3 Nf6 3. f4 5 moves Open guide → ECO C44 Array Scotch Game: Göring Gambit Open Games Moves: 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. c3 7 moves Open guide → ECO C45 Array Scotch Game: Mieses Variation Open Games Moves: 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Nf6 5. Nxc6 bxc6 6. e5 11 moves Open guide → ECO B08 Array Pirc Defense: Classical Variation Semi-Open Games Moves: 1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Nf3 7 moves Open guide → ECO B07 Array Pirc Defense: Byrne Variation Semi-Open Games Moves: 1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Bg5 7 moves Open guide → ECO B01 Array Scandinavian Defense: Mieses-Kotroc Variation Semi-Open Games Moves: 1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 6 moves Open guide → ECO B01 Array Scandinavian Defense: Modern Variation Semi-Open Games Moves: 1. e4 d5 2. exd5 Nf6 3. d4 Nxd5 6 moves Open guide → ECO C43 Array Petrov Defense: Modern Attack Open Games Moves: 1. e4 e5 2. Nf3 Nf6 3. d4 5 moves Open guide → ECO C67 Array Ruy Lopez: Berlin, Rio de Janeiro Variation Open Games Moves: 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. Re1 9 moves Open guide → ECO C54 Array Italian Game: Classical Variation Open Games Moves: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d4 9 moves Open guide → ECO C53 Array Italian Game: Classical, Giuoco Pianissimo Open Games Moves: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d3 9 moves Open guide → ECO C58 Array Italian: Two Knights, Polerio Defense Open Games Moves: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Na5 10 moves Open guide → ECO B97 Array Sicilian: Najdorf, English Attack Semi-Open Games Moves: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 11 moves Open guide → ECO B85 Array Sicilian: Scheveningen, Classical Variation Semi-Open Games Moves: 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 11 moves Open guide → ECO B76 Array Sicilian: Dragon, Yugoslav Attack Semi-Open Games Moves: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 O-O 8. Qd2 15 moves Open guide → ECO B72 Array Sicilian: Dragon, Classical Variation Semi-Open Games Moves: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be2 11 moves Open guide → ECO C07 Array French Defense: Tarrasch, Open Variation Open Games Moves: 1. e4 e6 2. d4 d5 3. Nd2 c5 4. exd5 exd5 8 moves Open guide → ECO C18 Array French Defense: Winawer, Advance Variation Open Games Moves: 1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 9 moves Open guide → ECO C12 Array French Defense: MacCutcheon Variation Open Games Moves: 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Bb4 8 moves Open guide → ECO D41 Array Semi-Tarrasch Defense Closed & Semi-Closed Games Moves: 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c5 5. cxd5 Nxd5 10 moves Open guide → ECO D53 Array Queen's Gambit Declined: Lasker Defense Closed & Semi-Closed Games Moves: 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Ne4 12 moves Open guide → ECO D25 Array Queen's Gambit Accepted: Classical Defense Closed & Semi-Closed Games Moves: 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 9 moves Open guide → ECO D17 Array Slav Defense: Czech Variation Closed & Semi-Closed Games Moves: 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 10 moves Open guide → ECO D58 Array Queen's Gambit Declined: Tartakower Defense Closed & Semi-Closed Games Moves: 1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. Bg5 Be7 5. e3 O-O 6. Nf3 h6 7. Bh4 b6 14 moves Open guide → ECO E21 Array Nimzo-Indian Defense: Three Knights Indian Defenses Moves: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Nf3 7 moves Open guide → ECO E41 Array Nimzo-Indian Defense: Huebner Variation Indian Defenses Moves: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Bd3 Nc6 10 moves Open guide → ECO E63 Array King's Indian: Fianchetto, Panno Variation Indian Defenses Moves: 1. d4 Nf6 2. c4 g6 3. Nf3 Bg7 4. g3 O-O 5. Bg2 d6 6. O-O Nc6 7. Nc3 a6 14 moves Open guide → ECO E97 Array King's Indian: Orthodox, Bayonet Attack Indian Defenses Moves: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O Nc6 8. d5 Ne7 9. b4 17 moves Open guide → ECO A48 Array London System: King's Indian Setup Flank Openings Moves: 1. d4 Nf6 2. Nf3 g6 3. Bf4 5 moves Open guide → ECO A59 Array Benko Gambit: Fully Accepted Flank Openings Moves: 1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. bxa6 Bxa6 10 moves Open guide → ECO A62 Array Benoni Defense: Fianchetto Variation Flank Openings Moves: 1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. g3 11 moves Open guide → ECO A65 Array Benoni Defense: King Pawn Line Flank Openings Moves: 1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 11 moves Open guide → ECO A13 Array English Opening: Neo-Catalan Declined Flank Openings Moves: 1. c4 Nf6 2. g3 e6 3. Bg2 d5 6 moves Open guide → ECO A09 Array Reti Opening: Advance Variation Flank Openings Moves: 1. Nf3 d5 2. c4 3 moves Open guide → ECO A07 Array Reti Opening: King's Indian Attack Flank Openings Moves: 1. Nf3 d5 2. g3 c5 3. Bg2 Nc6 6 moves Open guide → ECO B00 Array Owen Defense Semi-Open Games Moves: 1. e4 b6 2 moves Open guide → ECO D00 Array Stonewall Attack Closed & Semi-Closed Games Moves: 1. d4 d5 2. e3 Nf6 3. Bd3 e6 4. f4 7 moves Open guide → ECO A00 Array Sokolsky Opening Flank Openings Moves: 1. b4 e5 2. Bb2 3 moves Open guide → ECO A00 Array Hungarian Opening Flank Openings Moves: 1. g3 1 moves Open guide → ECO C35 Array King's Gambit Accepted: Cunningham Defense Open Games Moves: 1. e4 e5 2. f4 exf4 3. Nf3 Be7 6 moves Open guide → ECO C36 Array King's Gambit Accepted: Abbazia Defense Open Games Moves: 1. e4 e5 2. f4 exf4 3. Nf3 d5 6 moves Open guide → ECO C37 Array King's Gambit Accepted: Quaade Gambit Open Games Moves: 1. e4 e5 2. f4 exf4 3. Nf3 g5 4. Nc3 7 moves Open guide → ECO B15 Array Caro-Kann: Forgacs Variation Semi-Open Games Moves: 1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nf6 8 moves Open guide → ECO B16 Array Caro-Kann: Bronstein-Larsen Variation Semi-Open Games Moves: 1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nf6 5. Nxf6+ gxf6 10 moves Open guide → ECO B14 Array Caro-Kann: Panov-Botvinnik Attack Semi-Open Games Moves: 1. e4 c6 2. d4 d5 3. exd5 cxd5 4. c4 Nf6 5. Nc3 9 moves Open guide → ECO C26 Array Vienna Game: Falkbeer Variation Open Games Moves: 1. e4 e5 2. Nc3 Nf6 3. Bc4 5 moves Open guide → ECO C27 Array Vienna Game: Max Lange Defense Open Games Moves: 1. e4 e5 2. Nc3 Nf6 3. Bc4 Nxe4 6 moves Open guide → ECO C49 Array Four Knights Game: Double Ruy Lopez Open Games Moves: 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 8 moves Open guide → ECO D07 Array Queen's Gambit: Chigorin Defense Closed & Semi-Closed Games Moves: 1. d4 d5 2. c4 Nc6 4 moves Open guide → ECO D09 Array Queen's Gambit: Albin Counter-Gambit Closed & Semi-Closed Games Moves: 1. d4 d5 2. c4 e5 3. dxe5 d4 6 moves Open guide → ECO E05 Array Catalan Opening: Open, Classical Line Indian Defenses Moves: 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Be7 5. Nf3 O-O 6. O-O dxc4 7. Qc2 13 moves Open guide → ECO A90 Array Dutch Defense: Classical Variation Flank Openings Moves: 1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 10 moves Open guide → ECO A80 Array Dutch Defense: Raphael Variation Flank Openings Moves: 1. d4 f5 2. Nc3 3 moves Open guide → ECO E14 Array Queen's Indian Defense: Hungarian Variation Indian Defenses Moves: 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. e3 7 moves Open guide → ECO B41 Array Sicilian Defense: Kan Variation Semi-Open Games Moves: 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 8 moves Open guide → ECO B46 Array Sicilian Defense: Taimanov Variation Semi-Open Games Moves: 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 a6 10 moves Open guide → ECO B32 Array Sicilian Defense: Accelerated Dragon Semi-Open Games Moves: 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 8 moves Open guide → ECO B59 Array Sicilian Defense: Boleslavsky Variation Semi-Open Games Moves: 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. Be2 e5 7. Nb3 13 moves Open guide → ECO B58 Array Sicilian Defense: Classical Variation Semi-Open Games Moves: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Be2 11 moves Open guide → ECO B60 Array Sicilian Defense: Richter-Rauzer Variation Semi-Open Games Moves: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 11 moves Open guide → ECO B33 Array Sicilian Defense: Sveshnikov Variation Semi-Open Games Moves: 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 10 moves Open guide → ECO B81 Array Sicilian Defense: Scheveningen, Keres Attack Semi-Open Games Moves: 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. g4 11 moves Open guide → ECO B29 Array Sicilian Defense: Nimzowitsch Variation Semi-Open Games Moves: 1. e4 c5 2. Nf3 Nf6 4 moves Open guide → ECO B28 Array Sicilian Defense: O'Kelly Variation Semi-Open Games Moves: 1. e4 c5 2. Nf3 a6 4 moves Open guide → ECO B20 Array Sicilian Defense: Wing Gambit Semi-Open Games Moves: 1. e4 c5 2. b4 3 moves Open guide → ECO B27 Array Sicilian Defense: Hyperaccelerated Dragon Semi-Open Games Moves: 1. e4 c5 2. Nf3 g6 3. d4 5 moves Open guide → ECO B53 Array Sicilian Defense: Chekhover Variation Semi-Open Games Moves: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Qxd4 7 moves Open guide → ECO B54 Array Sicilian Defense: Prins Variation Semi-Open Games Moves: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. f3 9 moves Open guide → ECO C94 Array Ruy Lopez: Closed, Breyer Defense Open Games Moves: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Nb8 18 moves Open guide → ECO C96 Array Ruy Lopez: Closed, Chigorin Defense Open Games Moves: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 10. Bc2 19 moves Open guide → ECO C88 Array Ruy Lopez: Closed, Anti-Marshall Open Games Moves: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. a4 15 moves Open guide → ECO C86 Array Ruy Lopez: Closed, Worrall Attack Open Games Moves: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Qe2 11 moves Open guide → ECO C70 Array Ruy Lopez: Morphy Defense, Norwegian Variation Open Games Moves: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 b5 5. Bb3 Na5 10 moves Open guide → ECO C63 Array Ruy Lopez: Schliemann Defense Open Games Moves: 1. e4 e5 2. Nf3 Nc6 3. Bb5 f5 6 moves Open guide → ECO C61 Array Ruy Lopez: Bird Variation Open Games Moves: 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nd4 6 moves Open guide → ECO C60 Array Ruy Lopez: Cozio Defense Open Games Moves: 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nge7 6 moves Open guide → ECO C60 Array Ruy Lopez: Fianchetto Defense Open Games Moves: 1. e4 e5 2. Nf3 Nc6 3. Bb5 g6 6 moves Open guide → ECO C78 Array Ruy Lopez: Morphy Defense Open Games Moves: 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 d6 12 moves Open guide → ECO C10 Array French Defense: Rubinstein Variation Open Games Moves: 1. e4 e6 2. d4 d5 3. Nc3 dxe4 6 moves Open guide → ECO C11 Array French Defense: Burn Variation Open Games Moves: 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 dxe4 8 moves Open guide → ECO C00 Array French Defense: King's Indian Attack Open Games Moves: 1. e4 e6 2. d3 3 moves Open guide → ECO C00 Array French Defense: Normal Variation Open Games Moves: 1. e4 e6 2. d4 3 moves Open guide → ECO C00 Array French Defense: Alapin Gambit Open Games Moves: 1. e4 e6 2. d4 d5 3. Be3 5 moves Open guide → ECO C00 Array French Defense: Two Knights Variation Open Games Moves: 1. e4 e6 2. Nf3 d5 3. Nc3 5 moves Open guide → ECO C02 Array French Defense: Nimzowitsch Attack Open Games Moves: 1. e4 e6 2. d4 d5 3. e5 c5 4. Qg4 7 moves Open guide → ECO B17 Array Caro-Kann Defense: Karpov Variation Semi-Open Games Moves: 1. e4 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Nd7 8 moves Open guide → ECO B15 Array Caro-Kann Defense: Gurgenidze System Semi-Open Games Moves: 1. e4 c6 2. d4 d5 3. Nc3 g6 6 moves Open guide → ECO B15 Array Caro-Kann Defense: Tartakower Variation Semi-Open Games Moves: 1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nf6 5. Nxf6+ exf6 10 moves Open guide → ECO B10 Array Caro-Kann Defense: Breyer Variation Semi-Open Games Moves: 1. e4 c6 2. d3 3 moves Open guide → ECO B12 Array Caro-Kann Defense: Modern Variation Semi-Open Games Moves: 1. e4 c6 2. d4 d5 3. Nd2 5 moves Open guide → ECO B15 Array Caro-Kann Defense: Main Line Semi-Open Games Moves: 1. e4 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 7 moves Open guide → ECO C50 Array Italian Game: Rousseau Gambit Open Games Moves: 1. e4 e5 2. Nf3 Nc6 3. Bc4 f5 6 moves Open guide → ECO C56 Array Italian Game: Scotch Gambit Open Games Moves: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d4 exd4 5. O-O 9 moves Open guide → ECO C56 Array Italian Game: Scotch Gambit, Max Lange Attack Open Games Moves: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d4 exd4 5. e5 d5 6. Bb5 Ne4 12 moves Open guide → ECO C50 Array Italian Game: Anti-Fried Liver Defense Open Games Moves: 1. e4 e5 2. Nf3 Nc6 3. Bc4 h6 6 moves Open guide → ECO E92 Array King's Indian Defense: Gligoric-Taimanov System Indian Defenses Moves: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. Be3 13 moves Open guide → ECO E71 Array King's Indian Defense: Makogonov Variation Indian Defenses Moves: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. h3 9 moves Open guide → ECO E61 Array King's Indian Defense: Smyslov Variation Indian Defenses Moves: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. Nf3 d6 5. Bg5 9 moves Open guide → ECO E70 Array King's Indian Defense: Normal Variation Indian Defenses Moves: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 8 moves Open guide → ECO E90 Array King's Indian Defense: Larsen Variation Indian Defenses Moves: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be3 11 moves Open guide → ECO E90 Array King's Indian Defense: Zinnowitz Variation Indian Defenses Moves: 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Bg5 11 moves Open guide → ECO D38 Array Queen's Gambit Declined: Ragozin Defense Closed & Semi-Closed Games Moves: 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Bb4 8 moves Open guide → ECO D60 Array Queen's Gambit Declined: Orthodox Defense Closed & Semi-Closed Games Moves: 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bg5 O-O 6. e3 Nbd7 12 moves Open guide → ECO D41 Array Queen's Gambit Declined: Semi-Tarrasch Defense Closed & Semi-Closed Games Moves: 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c5 5. cxd5 9 moves Open guide → ECO D55 Array Queen's Gambit Declined: Neo-Orthodox Variation Closed & Semi-Closed Games Moves: 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bg5 O-O 6. e3 h6 12 moves Open guide → ECO D31 Array Queen's Gambit Declined: Charousek Variation Closed & Semi-Closed Games Moves: 1. d4 d5 2. c4 e6 3. Nc3 Be7 6 moves Open guide → ECO D38 Array Queen's Gambit Declined: Westphalian Variation Closed & Semi-Closed Games Moves: 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Bb4 5. Bg5 Nbd7 6. e3 c5 12 moves Open guide → ECO E47 Array Nimzo-Indian Defense: Normal Variation Indian Defenses Moves: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 9 moves Open guide → ECO E20 Array Nimzo-Indian Defense: Kmoch Variation Indian Defenses Moves: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. f3 7 moves Open guide → ECO E22 Array Nimzo-Indian Defense: Spielmann Variation Indian Defenses Moves: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qb3 7 moves Open guide → ECO E44 Array Nimzo-Indian Defense: St. Petersburg Variation Indian Defenses Moves: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 b6 5. Ne2 9 moves Open guide → ECO A15 Array English Opening: Anglo-Indian Defense, King's Knight Variation Flank Openings Moves: 1. c4 Nf6 2. Nf3 3 moves Open guide → ECO A10 Array English Opening: Great Snake Variation Flank Openings Moves: 1. c4 g6 2 moves Open guide → ECO A13 Array English Opening: Romanishin Gambit Flank Openings Moves: 1. c4 Nf6 2. Nf3 e6 3. g3 a6 4. Bg2 b5 8 moves Open guide → ECO A10 Array English Opening: Anglo-Dutch Defense Flank Openings Moves: 1. c4 f5 2 moves Open guide → ECO D48 Array Semi-Slav Defense: Meran Variation Closed & Semi-Closed Games Moves: 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 a6 9. e4 c5 18 moves Open guide → ECO D31 Array Semi-Slav Defense: Noteboom Variation Closed & Semi-Closed Games Moves: 1. d4 d5 2. c4 e6 3. Nc3 c6 4. Nf3 dxc4 8 moves Open guide → ECO D45 Array Semi-Slav Defense: Stoltz Variation Closed & Semi-Closed Games Moves: 1. d4 d5 2. Nf3 Nf6 3. c4 c6 4. e3 e6 5. Nc3 Nbd7 6. Qc2 Bd6 7. b3 O-O 8. Bb2 15 moves Open guide → ECO D46 Array Semi-Slav Defense: Romih Variation Closed & Semi-Closed Games Moves: 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7 6. Bd3 Bb4 12 moves Open guide → ECO D10 Array Slav Defense: Winawer Countergambit Closed & Semi-Closed Games Moves: 1. d4 d5 2. c4 c6 3. Nc3 e5 6 moves Open guide → ECO D16 Array Slav Defense: Soultanbeieff Variation Closed & Semi-Closed Games Moves: 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 e6 10 moves Open guide → ECO D11 Array Slav Defense: Quiet Variation Closed & Semi-Closed Games Moves: 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. e3 7 moves Open guide → ECO D80 Array Grünfeld Defense: Stockholm Variation Closed & Semi-Closed Games Moves: 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Bg5 7 moves Open guide → ECO D90 Array Grünfeld Defense: Flohr Variation Closed & Semi-Closed Games Moves: 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qa4+ 9 moves Open guide → ECO E14 Array Queen's Indian Defense: Spassky System Indian Defenses Moves: 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. e3 Bb7 5. Bd3 d5 10 moves Open guide → ECO E17 Array Queen's Indian Defense: Classical Variation Indian Defenses Moves: 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O 11 moves Open guide → ECO E12 Array Queen's Indian Defense: Miles Variation Indian Defenses Moves: 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. Bf4 7 moves Open guide → ECO A80 Array Dutch Defense: Hopton Attack Flank Openings Moves: 1. d4 f5 2. Bg5 3 moves Open guide → ECO A80 Array Dutch Defense: Korchnoi Attack Flank Openings Moves: 1. d4 f5 2. h3 3 moves Open guide → ECO A85 Array Dutch Defense: Queen's Knight Variation Flank Openings Moves: 1. d4 f5 2. c4 Nf6 3. Nc3 5 moves Open guide → ECO A84 Array Dutch Defense: Rubinstein Variation Flank Openings Moves: 1. d4 f5 2. c4 e6 3. Nc3 5 moves Open guide → ECO A90 Array Dutch Defense: Classical Variation Flank Openings Moves: 1. d4 f5 2. c4 Nf6 3. g3 e6 4. Bg2 Be7 5. Nf3 O-O 10 moves Open guide → ECO A67 Array Benoni Defense: Taimanov Variation Flank Openings Moves: 1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. f4 Bg7 8. Bb5+ 15 moves Open guide → ECO A68 Array Benoni Defense: Four Pawns Attack Flank Openings Moves: 1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. f4 Bg7 8. Nf3 O-O 16 moves Open guide → ECO A72 Array Benoni Defense: Classical Variation Flank Openings Moves: 1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. Nf3 Bg7 8. Be2 O-O 16 moves Open guide → ECO C30 Array King's Gambit Declined: Classical Variation Open Games Moves: 1. e4 e5 2. f4 Bc5 3. Nf3 d6 4. c3 7 moves Open guide → ECO C31 Array King's Gambit Declined: Falkbeer Countergambit Open Games Moves: 1. e4 e5 2. f4 d5 4 moves Open guide → ECO C33 Array King's Gambit Accepted: Bishop's Gambit Open Games Moves: 1. e4 e5 2. f4 exf4 3. Bc4 5 moves Open guide → ECO C39 Array King's Gambit Accepted: Kieseritzky Gambit Open Games Moves: 1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ne5 9 moves Open guide → ECO C39 Array King's Gambit Accepted: Allgaier Gambit Open Games Moves: 1. e4 e5 2. f4 exf4 3. Nf3 g5 4. h4 g4 5. Ng5 9 moves Open guide → ECO C30 Array King's Gambit Declined: Miles Defense Open Games Moves: 1. e4 e5 2. f4 Nc6 3. Nf3 f5 6 moves Open guide → ECO C47 Array Four Knights Game: Halloween Gambit Open Games Moves: 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Nxe5 7 moves Open guide → ECO C47 Array Four Knights Game: Belgrade Gambit Open Games Moves: 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. d4 exd4 5. Nd5 9 moves Open guide → ECO C44 Array Scotch Game: Haxo Gambit Open Games Moves: 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Bc4 Bc5 8 moves Open guide → ECO C44 Array Scotch Game: Lolli Variation Open Games Moves: 1. e4 e5 2. Nf3 Nc6 3. d4 Nxd4 4. Nxd4 exd4 5. Qxd4 9 moves Open guide → ECO C45 Array Scotch Game: Blumenfeld Attack Open Games Moves: 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Bc5 5. Be3 Qf6 6. Nb5 11 moves Open guide → ECO C42 Array Petrov's Defense: Classical Attack Open Games Moves: 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 9 moves Open guide → ECO C42 Array Petrov's Defense: Kaufmann Attack Open Games Moves: 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. c4 9 moves Open guide → ECO C42 Array Petrov's Defense: Nimzowitsch Attack Open Games Moves: 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. Nc3 9 moves Open guide → ECO E00 Array Catalan Opening: Hungarian Gambit Indian Defenses Moves: 1. d4 Nf6 2. c4 e6 3. g3 e5 6 moves Open guide → ECO B07 Array Pirc Defense: 150 Attack Semi-Open Games Moves: 1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Be3 c6 5. Qd2 9 moves Open guide → ECO B07 Array Pirc Defense: Kholmov System Semi-Open Games Moves: 1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Bc4 7 moves Open guide → ECO B07 Array Pirc Defense: Czech Defense Semi-Open Games Moves: 1. e4 d6 2. d4 Nf6 3. Nc3 c6 6 moves Open guide → ECO B06 Array Modern Defense: Standard Line Semi-Open Games Moves: 1. e4 g6 2. d4 Bg7 3. Nc3 5 moves Open guide → ECO A42 Array Modern Defense: Averbakh System Flank Openings Moves: 1. d4 g6 2. c4 Bg7 3. Nc3 d6 4. e4 7 moves Open guide → ECO B06 Array Modern Defense: Two Knights Variation Semi-Open Games Moves: 1. e4 g6 2. d4 Bg7 3. Nc3 d6 4. Nf3 7 moves Open guide → ECO B07 Array Modern Defense: Geller's System Semi-Open Games Moves: 1. e4 g6 2. d4 Bg7 3. Nf3 d6 4. c3 7 moves Open guide → ECO A45 Array Trompowsky Attack: Classical Defense Flank Openings Moves: 1. d4 Nf6 2. Bg5 e6 4 moves Open guide → ECO A45 Array Trompowsky Attack: Raptor Variation Flank Openings Moves: 1. d4 Nf6 2. Bg5 Ne4 3. h4 5 moves Open guide → ECO A45 Array Trompowsky Attack: Edge Variation Flank Openings Moves: 1. d4 Nf6 2. Bg5 Ne4 3. Bh4 5 moves Open guide → ECO B01 Array Scandinavian Defense: Icelandic-Palme Gambit Semi-Open Games Moves: 1. e4 d5 2. exd5 Nf6 3. c4 e6 6 moves Open guide → ECO B01 Array Scandinavian Defense: Qd6 Variation Semi-Open Games Moves: 1. e4 d5 2. exd5 Qxd5 3. Nc3 Qd6 6 moves Open guide → ECO C24 Array Bishop's Opening: Ponziani Gambit Open Games Moves: 1. e4 e5 2. Bc4 Nf6 3. d4 5 moves Open guide → ECO C23 Array Bishop's Opening: Calabrese Countergambit Open Games Moves: 1. e4 e5 2. Bc4 f5 4 moves Open guide → ECO C23 Array Bishop's Opening: Khan Gambit Open Games Moves: 1. e4 e5 2. Bc4 d5 4 moves Open guide → ECO C26 Array Vienna Game: Mieses Variation Open Games Moves: 1. e4 e5 2. Nc3 Nf6 3. g3 5 moves Open guide → ECO C25 Array Vienna Game: Anderssen Defense Open Games Moves: 1. e4 e5 2. Nc3 Bc5 4 moves Open guide → ECO C26 Array Vienna Game: Stanley Variation Open Games Moves: 1. e4 e5 2. Nc3 Nf6 3. Bc4 5 moves Open guide → ECO E11 Array Bogo-Indian Defense: Grünfeld Variation Indian Defenses Moves: 1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ 4. Nbd2 7 moves Open guide → ECO E11 Array Bogo-Indian Defense: Wade-Smyslov Variation Indian Defenses Moves: 1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ 4. Bd2 a5 8 moves Open guide → ECO B03 Array Alekhine Defense: Balogh Variation Semi-Open Games Moves: 1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Bc4 7 moves Open guide → ECO B02 Array Alekhine Defense: Spielmann Gambit Semi-Open Games Moves: 1. e4 Nf6 2. Nc3 d5 3. e5 Nfd7 4. e6 7 moves Open guide → ECO B02 Array Alekhine Defense: Brooklyn Variation Semi-Open Games Moves: 1. e4 Nf6 2. e5 Ng8 4 moves Open guide → ECO D20 Array Queen's Gambit Accepted: Saduleto Variation Closed & Semi-Closed Games Moves: 1. d4 d5 2. c4 dxc4 3. e4 5 moves Open guide → ECO D21 Array Queen's Gambit Accepted: Godes Variation Closed & Semi-Closed Games Moves: 1. d4 d5 2. c4 dxc4 3. Nf3 Nd7 6 moves Open guide → ECO A55 Array Old Indian Defense: Normal Variation Flank Openings Moves: 1. d4 Nf6 2. c4 d6 3. Nc3 Nbd7 4. e4 e5 5. Nf3 9 moves Open guide → ECO A48 Array London System: King's Indian Variation Flank Openings Moves: 1. d4 Nf6 2. Nf3 g6 3. Bf4 5 moves Open guide →