ChessAlgo Opening Library

Open Games

ChessAlgo opening guides for the Open Games family — move order, learning level, and direct opening links.

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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 →