♞ Chess1

Chess Openings

3810 ECO lines with main-line moves and diagrams. Start with the flagship families, or browse by volume.

Flagship openings

Sicilian Defense B20
2 plies in the main line
French Defense C00
2 plies in the main line
English Opening A10
1 plies in the main line
Caro-Kann Defense B10
2 plies in the main line
Queen's Pawn Game A40
1 plies in the main line
Queen's Pawn Game A41
2 plies in the main line
Queen's Pawn Game D00
2 plies in the main line
Dutch Defense A80
2 plies in the main line
Alekhine Defense B02
2 plies in the main line
Indian Defense A45
2 plies in the main line
Zukertort Opening A04
1 plies in the main line
Zukertort Opening A05
2 plies in the main line
Zukertort Opening A06
2 plies in the main line
Scandinavian Defense B01
2 plies in the main line
Réti Opening A09
3 plies in the main line
Nimzowitsch Defense B00
2 plies in the main line
Modern Defense B06
2 plies in the main line
King's Pawn Game B00
1 plies in the main line
King's Pawn Game C20
2 plies in the main line
Van Geet Opening A00
1 plies in the main line
Bird Opening A02
1 plies in the main line
Pirc Defense B00
2 plies in the main line
Polish Opening A00
1 plies in the main line
King's Indian Attack A07
3 plies in the main line

All lines by ECO volume

A — Flank openings (817)B — Semi-open games (772)C — Open games & French (1250)D — Closed & semi-closed (614)E — Indian defenses (357)

E — Indian defenses

NameECOMoves
Nimzo-Indian Defense: St. Petersburg Variation, with Ne4E4312
Nimzo-Indian Defense: St. Petersburg VariationE449
Nimzo-Indian Defense: St. Petersburg Variation, American VariationE4410
Nimzo-Indian Defense: St. Petersburg Variation, Romanishin-Psakhis VariationE4412
Nimzo-Indian Defense: St. Petersburg Variation, Fischer VariationE4510
Nimzo-Indian Defense: Normal VariationE468
Nimzo-Indian Defense: Reshevsky VariationE469
Nimzo-Indian Defense: Simagin VariationE4612
Nimzo-Indian Defense: Normal VariationE479
Nimzo-Indian Defense: Normal Variation, Classical DefenseE4810
Nimzo-Indian Defense: Ragozin DefenseE4813
Nimzo-Indian Defense: Normal Variation, Botvinnik SystemE4913
Nimzo-Indian DefenseE509
Nimzo-Indian Defense: Normal Variation, Ragozin VariationE5110
Nimzo-Indian Defense: Normal Variation, Sämisch DeferredE5111
Nimzo-Indian Defense: Ragozin VariationE5114
Nimzo-Indian Defense: Normal Variation, Schlechter DefenseE5212
Nimzo-Indian Defense: Normal Variation, Schlechter DefenseE5214
Nimzo-Indian Defense: Normal Variation, Gligoric SystemE5312
Nimzo-Indian Defense: Normal Variation, Gligoric SystemE5314
Nimzo-Indian Defense: Normal Variation, Gligoric System, Keres VariationE5314
Nimzo-Indian Defense: Normal Variation, Gligoric System, Exchange VariationE5415
Nimzo-Indian Defense: Normal Variation, Gligoric System, Exchange VariationE5417
Nimzo-Indian Defense: Normal Variation, Gligoric System, Smyslov VariationE5416
Nimzo-Indian Defense: Normal Variation, Gligoric System, Bronstein VariationE5516
Nimzo-Indian Defense: Normal Variation, Gligoric System, Bernstein DefenseE5614
Nimzo-Indian Defense: Normal Variation, Gligoric System, Bernstein DefenseE5718
Nimzo-Indian Defense: Normal Variation, Bernstein Defense, Exchange LineE5817
Nimzo-Indian Defense: Normal Variation, Bernstein DefenseE5919
Nimzo-Indian Defense: Normal Variation, Bernstein DefenseE5921
Grünfeld Defense: Counterthrust VariationE608
Indian Defense: Anti-Grünfeld, Adorjan GambitE606
Indian Defense: Anti-Grünfeld, Advance VariationE605
Indian Defense: Anti-Grünfeld, Alekhine VariationE605
Indian Defense: Anti-Grünfeld, Alekhine Variation, Leko GambitE606
Indian Defense: Anti-Grünfeld, Basman-Williams AttackE605
Indian Defense: West Indian DefenseE604
King's Indian Defense: Fianchetto VariationE607
King's Indian Defense: Fianchetto Variation, Immediate FianchettoE605
King's Indian Defense: Normal Variation, King's Knight VariationE605
King's Indian Defense: Santasiere VariationE607
King's Indian Defense: Semi-Classical Variation, Benoni VariationE6012
King's Indian Defense: Semi-Classical Variation, Hollywood VariationE6012
Queen's Pawn, Mengarini AttackE605
King's Indian DefenseE615
King's Indian Defense: Fianchetto Variation, Benjamin DefenseE6114
King's Indian Defense: Semi-Classical VariationE6111
King's Indian Defense: Semi-Classical Variation, Exchange VariationE6116
King's Indian Defense: Semi-Classical Variation, Queenside Storm LineE6115
King's Indian Defense: Smyslov VariationE619
King's Indian Defense: Fianchetto Variation, Carlsbad VariationE6212
King's Indian Defense: Fianchetto Variation, Delayed FianchettoE629
King's Indian Defense: Fianchetto Variation, Kavalek DefenseE6214
King's Indian Defense: Fianchetto Variation, Larsen DefenseE6214
King's Indian Defense: Fianchetto Variation, Lesser Simagin (Spassky)E6214
King's Indian Defense: Fianchetto Variation, Simagin VariationE6214
King's Indian Defense: Fianchetto Variation, Uhlmann-Szabo SystemE6214
King's Indian Defense: Fianchetto Variation, Panno VariationE6314
King's Indian Defense: Fianchetto Variation, Panno Variation, Blockade LineE6320
King's Indian Defense: Fianchetto Variation, Panno Variation, Donner LineE6326
King's Indian Defense: Fianchetto Variation, Panno Variation, Korchnoi LineE6319
King's Indian Defense: Fianchetto Variation, Double Fianchetto AttackE6415
King's Indian Defense: Fianchetto Variation, Hungarian VariationE6414
King's Indian Defense: Fianchetto Variation, Pterodactyl VariationE6410
King's Indian Defense: Fianchetto Variation, Yugoslav SystemE6412
King's Indian Defense: Fianchetto Variation, Yugoslav Variation, Rare LineE6412
King's Indian Defense: Fianchetto Variation, Yugoslav VariationE6513
King's Indian Defense: Fianchetto Variation, Yugoslav Variation, Exchange LineE6516
King's Indian Defense: Fianchetto Variation, Yugoslav Variation, Advance LineE6615
King's Indian Defense: Fianchetto Variation, Classical FianchettoE6714
King's Indian Defense: Fianchetto Variation, Debrecen DefenseE6712
King's Indian Defense: Fianchetto Variation, Classical VariationE6815
King's Indian Defense: Fianchetto Variation, Long VariationE6822
King's Indian Defense: Fianchetto Variation, Classical Main LineE6917
King's Indian Defense: Accelerated Averbakh VariationE709
King's Indian Defense: Kramer VariationE709
King's Indian Defense: Normal VariationE707
King's Indian Defense: Normal VariationE708
King's Indian Defense: Karpov SystemE7111
King's Indian Defense: Makogonov VariationE719
King's Indian Defense: Normal Variation, Deferred FianchettoE729
King's Indian Defense: Pomar SystemE7213
King's Indian Defense: Averbakh VariationE7311
King's Indian Defense: Averbakh Variation, Flexible DefenseE7312
King's Indian Defense: Averbakh Variation, Geller DefenseE7312
King's Indian Defense: Averbakh Variation, Modern DefenseE7312
King's Indian Defense: Averbakh Variation, Modern Defense, Burgess LineE7314
King's Indian Defense: Averbakh Variation, Nc6 DefenseE7312
King's Indian Defense: Averbakh Variation, Spanish DefenseE7312
King's Indian Defense: Normal Variation, Standard DevelopmentE739
King's Indian Defense: Semi-Averbakh SystemE7311
King's Indian Defense: Averbakh Variation, Benoni DefenseE7412
King's Indian Defense: Averbakh Variation, Benoni Defense, Advance VariationE7413
King's Indian Defense: Averbakh Variation, Benoni Defense, Exchange VariationE7413
King's Indian Defense: Averbakh Variation, Main LineE7514
King's Indian Defense: Four Pawns AttackE769
King's Indian Defense: Four Pawns Attack, Dynamic AttackE7613
King's Indian Defense: Four Pawns Attack, Modern DefenseE7610
King's Indian Defense: Four Pawns AttackE7711
King's Indian Defense: Four Pawns Attack, Florentine GambitE7717

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Family pages group related lines: the family head with a diagram, main continuations and every catalogued variation.

Volume A Volume B Volume C Volume D Volume E Gambits Defenses