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)

B — Semi-open games

NameECOMoves
Scandinavian Defense: Lasker VariationB0111
Scandinavian Defense: Main LineB016
Scandinavian Defense: Main Line, Leonhardt GambitB017
Scandinavian Defense: Main Line, Mieses VariationB018
Scandinavian Defense: Marshall VariationB016
Scandinavian Defense: Mieses-Kotroc VariationB014
Scandinavian Defense: Modern VariationB014
Scandinavian Defense: Modern VariationB015
Scandinavian Defense: Modern Variation, Gipslis VariationB018
Scandinavian Defense: Modern Variation, Wing GambitB018
Scandinavian Defense: Panov TransferB016
Scandinavian Defense: Portuguese GambitB016
Scandinavian Defense: Portuguese Gambit, Banker VariationB019
Scandinavian Defense: Portuguese Gambit, Classical VariationB017
Scandinavian Defense: Portuguese Gambit, Correspondence RefutationB019
Scandinavian Defense: Portuguese Gambit, Elbow VariationB018
Scandinavian Defense: Portuguese Gambit, Jadoul VariationB0111
Scandinavian Defense: Portuguese Gambit, Lusophobe VariationB019
Scandinavian Defense: Portuguese Gambit, Melbourne Shuffle VariationB0111
Scandinavian Defense: Portuguese Gambit, Wuss VariationB017
Scandinavian Defense: Richter VariationB018
Scandinavian Defense: Richter VariationB016
Scandinavian Defense: Schiller-Pytel VariationB018
Scandinavian Defense: Schiller-Pytel Variation, Modern VariationB0114
Scandinavian Defense: Valencian VariationB016
Scandinavian Defense: Valencian Variation, Ilundain VariationB0110
Scandinavian Defense: Valencian Variation, Main LineB0110
Scandinavian Defense: Zilbermints GambitB013
Van Geet Opening: Grünfeld DefenseB016
Alekhine DefenseB022
Alekhine Defense: Brooklyn VariationB024
Alekhine Defense: Brooklyn Variation, Everglades VariationB026
Alekhine Defense: Buckley AttackB025
Alekhine Defense: Hunt Variation, Lasker Simul GambitB0211
Alekhine Defense: Hunt Variation, Matsukevich GambitB0213
Alekhine Defense: Hunt Variation, Mikenas GambitB0215
Alekhine Defense: Kmoch VariationB029
Alekhine Defense: Krejcik VariationB023
Alekhine Defense: Krejcik Variation, Krejcik GambitB025
Alekhine Defense: Maróczy VariationB023
Alekhine Defense: Mokele MbembeB024
Alekhine Defense: Mokele Mbembe, Modern LineB026
Alekhine Defense: Mokele Mbembe, Vavra DefenseB026
Alekhine Defense: Normal VariationB024
Alekhine Defense: Scandinavian VariationB024
Alekhine Defense: Scandinavian Variation, Geschev GambitB026
Alekhine Defense: Scandinavian Variation, Myers GambitB027
Alekhine Defense: Spielmann GambitB027
Alekhine Defense: Steiner VariationB027
Alekhine Defense: Sämisch AttackB025
Alekhine Defense: The SquirrelB026
Alekhine Defense: Two Pawns AttackB025
Alekhine Defense: Two Pawns Attack, Lasker VariationB027
Alekhine Defense: Two Pawns Attack, Mikenas VariationB0212
Alekhine Defense: Two Pawns Attack, Tate VariationB027
Alekhine Defense: Welling VariationB025
Alekhine DefenseB035
Alekhine DefenseB036
Alekhine DefenseB037
Alekhine Defense: Balogh VariationB037
Alekhine Defense: Exchange VariationB039
Alekhine Defense: Exchange Variation, Karpov VariationB0321
Alekhine Defense: Exchange Variation, Voronezh VariationB0317
Alekhine Defense: Four Pawns AttackB039
Alekhine Defense: Four Pawns Attack, Cambridge GambitB0310
Alekhine Defense: Four Pawns Attack, Fianchetto VariationB0310
Alekhine Defense: Four Pawns Attack, Ilyin-Zhenevsky VariationB0317
Alekhine Defense: Four Pawns Attack, Korchnoi VariationB0320
Alekhine Defense: Four Pawns Attack, Main LineB0313
Alekhine Defense: Four Pawns Attack, Tartakower VariationB0322
Alekhine Defense: Four Pawns Attack, Trifunovic VariationB0310
Alekhine Defense: Hunt VariationB039
Alekhine Defense: Modern Variation, Alekhine GambitB0311
Alekhine Defense: O'Sullivan GambitB036
Alekhine Defense: Modern VariationB047
Alekhine Defense: Modern Variation, Alburt VariationB048
Alekhine Defense: Modern Variation, Keres VariationB0413
Alekhine Defense: Modern Variation, Larsen VariationB048
Alekhine Defense: Modern Variation, Larsen-Haakert VariationB048
Alekhine Defense: Modern Variation, Schmid VariationB048
Alekhine Defense: Modern Variation, Alekhine VariationB059
Alekhine Defense: Modern Variation, Flohr VariationB0510
Alekhine Defense: Modern Variation, Main LineB058
Alekhine Defense: Modern Variation, Panov VariationB059
Alekhine Defense: Modern Variation, Vitolins AttackB0511
Modern DefenseB062
Modern DefenseB064
Modern Defense: Anti-ModernB069
Modern Defense: Bishop AttackB065
Modern Defense: Bishop Attack, Bücker GambitB066
Modern Defense: Bishop Attack, Monkey's BumB068
Modern Defense: Dunworthy VariationB0610
Modern Defense: Fianchetto GambitB064
Modern Defense: Gurgenidze DefenseB0610
Modern Defense: Lizard Defense, Mittenberger GambitB066
Modern Defense: Masur GambitB0610
Modern Defense: Modern PterodactylB066
Modern Defense: Mongredien Defense, with Nc3B066
Modern Defense: Mongredien Defense, with Nf3B066
Modern Defense: Norwegian DefenseB064

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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