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)

A — Flank openings

NameECOMoves
Queen's Pawn Game: Chigorin VariationA454
Queen's Pawn Game: Veresov, Richter AttackA455
Trompowsky AttackA453
Trompowsky Attack: Borg VariationA456
Trompowsky Attack: Classical DefenseA454
Trompowsky Attack: Classical Defense, Big Center VariationA455
Trompowsky Attack: Edge VariationA455
Trompowsky Attack: Edge Variation, Hergert GambitA4513
Trompowsky Attack: Edge Variation, Hergert GambitA4511
Trompowsky Attack: Poisoned Pawn VariationA457
Trompowsky Attack: Raptor VariationA455
Trompowsky Attack: Raptor Variation, Hergert GambitA458
Döry DefenseA464
Indian Defense: Czech-IndianA464
Indian Defense: Knights VariationA463
Indian Defense: Knights Variation, Alburt-Miles VariationA464
Indian Defense: London SystemA465
Indian Defense: Polish VariationA464
Indian Defense: Spielmann-IndianA464
Indian Defense: Wade-Tartakower DefenseA464
Queen's Pawn Game: Torre Attack, Breyer VariationA4610
Queen's Pawn Game: Veresov Attack, Classical DefenseA467
Torre Attack: Classical DefenseA465
Torre Attack: Classical Defense, Nimzowitsch VariationA466
Torre Attack: Classical Defense, Petrosian GambitA469
Torre Attack: Wagner GambitA467
Yusupov-Rubinstein SystemA465
Indian Defense: Schnepper GambitA476
Marienbad SystemA478
Marienbad System: Berg VariationA4711
Pseudo Queen's Indian DefenseA474
Pseudo Queen's Indian DefenseA4712
East Indian DefenseA484
Indian Defense: Colle System, King's Indian VariationA488
London SystemA485
London SystemA487
London SystemA488
London System, with Bd3A489
London System, with Be2A489
London System, with Be2A4810
London System, with Be2A4811
Queen's Pawn Game: Barry AttackA487
Queen's Pawn Game: Barry AttackA488
Queen's Pawn Game: Barry Attack, Grünfeld VariationA4811
Queen's Pawn Game: Barry Attack, Tarzan AttackA489
Queen's Pawn Game: Torre Attack, Grünfeld Variation, Main LineA4810
Torre Attack: Fianchetto DefenseA485
Torre Attack: Fianchetto Defense, Euwe VariationA488
Indian Defense: Przepiorka VariationA495
Indian Defense: Medusa GambitA504
Indian Defense: Normal VariationA503
Indian Defense: Pyrenees GambitA504
Mexican DefenseA504
Mexican Defense: Horsefly GambitA507
Queen's Indian AcceleratedA504
Slav IndianA504
Indian Defense: Budapest GambitA514
Indian Defense: Budapest Gambit AcceptedA515
Indian Defense: Budapest Gambit Accepted, Fajarowicz DefenseA516
Indian Defense: Budapest Gambit Accepted, Fajarowicz Defense, Bonsdorf VariationA517
Indian Defense: Budapest Gambit Accepted, Fajarowicz Defense, Steiner VariationA517
Indian Defense: Budapest Gambit Accepted, Main LineA526
Indian Defense: Budapest Gambit Accepted, Main Line, Adler VariationA527
Indian Defense: Budapest Gambit Accepted, Main Line, Alekhine VariationA527
Indian Defense: Budapest Gambit Accepted, Main Line, Alekhine Variation, Abonyi VariationA528
Indian Defense: Budapest Gambit Accepted, Main Line, Alekhine Variation, Tartakower DefenseA528
Indian Defense: Budapest Gambit Accepted, Main Line, Rubinstein VariationA527
Old Indian DefenseA534
Old Indian Defense: Aged Gibbon GambitA535
Old Indian Defense: Czech Variation, with Nc3A536
Old Indian Defense: Czech Variation, with Nf3A536
Old Indian Defense: Janowski VariationA536
Old Indian Defense: Janowski Variation, Fianchetto VariationA537
Old Indian Defense: Janowski Variation, Grinberg GambitA537
Old Indian Defense: Janowski Variation, Main LineA537
Old Indian Defense: Duz-Khotimirsky VariationA549
Old Indian Defense: Tartakower-IndianA546
Old Indian Defense: Two Knights VariationA547
Old Indian Defense: Ukrainian VariationA546
Old Indian Defense: Normal VariationA559
Benoni DefenseA564
Benoni Defense: Czech Benoni DefenseA566
Benoni Defense: Hromádka SystemA566
Benoni Defense: King's Indian SystemA5610
Benoni Defense: Weenink VariationA566
Grünfeld Defense: Three Knights Variation, Burille Variation, Reversed TarraschA5616
Vulture DefenseA566
Benko GambitA576
Benko Gambit AcceptedA578
Benko Gambit Accepted: Dlugy VariationA579
Benko Gambit Accepted: Modern VariationA579
Benko Gambit Accepted: Pawn Return VariationA579
Benko Gambit Declined: Bishop AttackA577
Benko Gambit Declined: Hjørring CountergambitA577
Benko Gambit Declined: Main LineA577
Benko Gambit Declined: Pseudo-SämischA577
Benko Gambit Declined: Quiet LineA577
Benko Gambit Declined: Sosonko VariationA577
Benko Gambit: Mutkin CountergambitA577
Benko Gambit: Nescafe Frappe AttackA5715

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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