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)

C — Open games & French

NameECOMoves
Four Knights Game: Spanish Variation, Bardeleben VariationC4818
Four Knights Game: Spanish Variation, Classical VariationC488
Four Knights Game: Spanish Variation, Ranken VariationC489
Four Knights Game: Spanish Variation, Rubinstein VariationC488
Four Knights Game: Spanish Variation, Rubinstein VariationC489
Four Knights Game: Spanish Variation, Rubinstein VariationC4811
Four Knights Game: Spanish Variation, Rubinstein Variation AcceptedC489
Four Knights Game: Spanish Variation, Rubinstein Variation, Henneberger VariationC489
Four Knights Game: Spanish Variation, Rubinstein Variation, Marshall GambitC4812
Four Knights Game: Spanish Variation, Rubinstein Variation, Marshall VariationC4812
Four Knights Game: Spanish Variation, Rubinstein Variation, Maróczy VariationC4818
Four Knights Game: Spanish Variation, Spielmann VariationC4820
Four Knights Game: Spanish VariationC4912
Four Knights Game: Spanish Variation, Alatortsev VariationC4914
Four Knights Game: Spanish Variation, Double SpanishC498
Four Knights Game: Spanish Variation, Double SpanishC4911
Four Knights Game: Spanish Variation, Gunsberg CounterattackC4914
Four Knights Game: Spanish Variation, Janowski VariationC4915
Four Knights Game: Spanish Variation, Nimzowitsch VariationC4911
Four Knights Game: Spanish Variation, Svenonius VariationC4914
Four Knights Game: Spanish Variation, Symmetrical VariationC4912
Four Knights Game: Spanish Variation, Symmetrical VariationC4920
Four Knights Game: Spanish Variation, Symmetrical VariationC4914
Four Knights Game: Spanish Variation, Symmetrical VariationC4913
Four Knights Game: Spanish Variation, Symmetrical Variation, Blake VariationC4920
Four Knights Game: Spanish Variation, Symmetrical Variation, Metger UnpinC4916
Four Knights Game: Spanish Variation, Symmetrical Variation, Tarrasch VariationC4914
Four Knights Game: Italian VariationC508
Italian GameC505
Italian Game: Anti-Fried Liver DefenseC506
Italian Game: Blackburne-Kostić GambitC506
Italian Game: Classical Variation, Albin GambitC509
Italian Game: Deutz GambitC509
Italian Game: Giuoco PianissimoC507
Italian Game: Giuoco PianissimoC5011
Italian Game: Giuoco PianissimoC5010
Italian Game: Giuoco PianissimoC5011
Italian Game: Giuoco Pianissimo, Canal VariationC5011
Italian Game: Giuoco Pianissimo, Dubois VariationC5010
Italian Game: Giuoco Pianissimo, Italian Four Knights VariationC509
Italian Game: Giuoco Pianissimo, Lucchini GambitC508
Italian Game: Giuoco Pianissimo, NormalC508
Italian Game: Giuoco PianoC506
Italian Game: Hungarian DefenseC506
Italian Game: Hungarian Defense, Tartakower VariationC5012
Italian Game: Jerome GambitC507
Italian Game: Paris DefenseC506
Italian Game: Rosentreter GambitC507
Italian Game: Rousseau GambitC506
Italian Game: Evans GambitC517
Italian Game: Evans GambitC5118
Italian Game: Evans Gambit AcceptedC518
Italian Game: Evans Gambit DeclinedC518
Italian Game: Evans Gambit DeclinedC519
Italian Game: Evans Gambit Declined, Cordel VariationC519
Italian Game: Evans Gambit Declined, Hicken VariationC5117
Italian Game: Evans Gambit Declined, Hirschbach VariationC5112
Italian Game: Evans Gambit Declined, Lange VariationC5112
Italian Game: Evans Gambit Declined, Pavlov VariationC5123
Italian Game: Evans Gambit Declined, Showalter VariationC5111
Italian Game: Evans Gambit Declined, Vasquez VariationC5115
Italian Game: Evans Gambit, Anderssen VariationC5110
Italian Game: Evans Gambit, Anderssen Variation, Cordel LineC5112
Italian Game: Evans Gambit, Fontaine CountergambitC518
Italian Game: Evans Gambit, Fraser AttackC5119
Italian Game: Evans Gambit, Fraser-Mortimer AttackC5125
Italian Game: Evans Gambit, Göring AttackC5119
Italian Game: Evans Gambit, Harding VariationC5115
Italian Game: Evans Gambit, Hein CountergambitC518
Italian Game: Evans Gambit, Mayet DefenseC5110
Italian Game: Evans Gambit, McDonnell DefenseC5110
Italian Game: Evans Gambit, McDonnell Defense, Main LineC5116
Italian Game: Evans Gambit, Morphy AttackC5117
Italian Game: Evans Gambit, Mortimer-Evans GambitC5126
Italian Game: Evans Gambit, Paulsen VariationC5120
Italian Game: Evans Gambit, Steinitz VariationC5121
Italian Game: Evans Gambit, Stone-Ware VariationC5110
Italian Game: Evans Gambit, Ulvestad VariationC5119
Italian Game: Evans GambitC5212
Italian Game: Evans Gambit, Alapin-Steinitz VariationC5214
Italian Game: Evans Gambit, Anderssen DefenseC5214
Italian Game: Evans Gambit, Bronstein DefenseC5212
Italian Game: Evans Gambit, Compromised DefenseC5214
Italian Game: Evans Gambit, Compromised Defense, Main LineC5221
Italian Game: Evans Gambit, Compromised Defense, Potter VariationC5221
Italian Game: Evans Gambit, Dufresne DefenseC5214
Italian Game: Evans Gambit, Johner DefenseC5214
Italian Game: Evans Gambit, Laroche VariationC5212
Italian Game: Evans Gambit, Lasker DefenseC5214
Italian Game: Evans Gambit, Leonhardt CountergambitC5212
Italian Game: Evans Gambit, Levenfish VariationC5221
Italian Game: Evans Gambit, Main LineC5210
Italian Game: Evans Gambit, Mieses DefenseC5214
Italian Game: Evans Gambit, Pierce DefenseC5212
Italian Game: Evans Gambit, Richardson AttackC5215
Italian Game: Evans Gambit, Sanders-Alapin VariationC5214
Italian Game: Evans Gambit, Slow VariationC5211
Italian Game: Evans Gambit, Sokolsky VariationC5213
Italian Game: Evans Gambit, Tartakower AttackC5213
Italian Game: Evans Gambit, Waller AttackC5215

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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