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
Sicilian Defense: O'Kelly Variation, Maróczy Bind, Robatsch LineB286
Sicilian Defense: O'Kelly Variation, Normal SystemB285
Sicilian Defense: O'Kelly Variation, Normal System, Cortlever GambitB287
Sicilian Defense: O'Kelly Variation, Normal System, Smith-Morra LineB287
Sicilian Defense: O'Kelly Variation, Normal System, Taimanov LineB288
Sicilian Defense: O'Kelly Variation, Normal System, Zagorovsky LineB287
Sicilian Defense: O'Kelly Variation, Quiet SystemB285
Sicilian Defense: O'Kelly Variation, Réti SystemB285
Sicilian Defense: O'Kelly Variation, Venice SystemB285
Sicilian Defense: O'Kelly Variation, Venice System, Barcza LineB286
Sicilian Defense: O'Kelly Variation, Venice System, Gambit LineB288
Sicilian Defense: O'Kelly Variation, Venice System, Ljubojevic LineB286
Sicilian Defense: O'Kelly Variation, Venice System, Steiner LineB286
Sicilian Defense: O'Kelly Variation, Wing GambitB285
Sicilian Defense: O'Kelly Variation, Yerevan SystemB285
Sicilian Defense: Nimzowitsch VariationB294
Sicilian Defense: Nimzowitsch Variation, Advance VariationB295
Sicilian Defense: Nimzowitsch Variation, Closed VariationB295
Sicilian Defense: Nimzowitsch Variation, Exchange VariationB298
Sicilian Defense: Nimzowitsch Variation, Main LineB2912
Sicilian Defense: Closed, Anti-Sveshnikov VariationB306
Sicilian Defense: Closed, Anti-Sveshnikov Variation, Kharlov-Kramnik LineB3012
Sicilian Defense: Closed, Anti-Sveshnikov Variation, with Nf6B3010
Sicilian Defense: Closed, Anti-Sveshnikov Variation, with d6B3010
Sicilian Defense: Nyezhmetdinov-Rossolimo AttackB305
Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Brooklyn Retreat DefenseB306
Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, San Francisco GambitB307
Sicilian Defense: Old SicilianB304
Sicilian Defense: Portsmouth GambitB305
Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Fianchetto VariationB316
Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Fianchetto Variation, Gufeld GambitB3111
Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Fianchetto Variation, Lutikov GambitB3111
Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Fianchetto Variation, Totsky AttackB3111
Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Gurgenidze VariationB3111
Sicilian Defense: Accelerated DragonB328
Sicilian Defense: Flohr VariationB328
Sicilian Defense: Franco-Sicilian VariationB326
Sicilian Defense: Godiva VariationB328
Sicilian Defense: Kalashnikov VariationB3210
Sicilian Defense: Löwenthal VariationB328
Sicilian Defense: Nimzo-American VariationB328
Sicilian Defense: O'Kelly Variation, Maróczy Bind, Geller LineB3210
Sicilian Defense: OpenB325
Sicilian Defense: OpenB326
Sicilian Defense: OpenB327
Sicilian Defense: Lasker-Pelikan VariationB3310
Sicilian Defense: Lasker-Pelikan Variation, Bird VariationB3316
Sicilian Defense: Lasker-Pelikan Variation, Exchange VariationB3311
Sicilian Defense: Lasker-Pelikan Variation, Retreat VariationB3311
Sicilian Defense: Lasker-Pelikan Variation, Schlechter VariationB3311
Sicilian Defense: Lasker-Pelikan Variation, Sveshnikov VariationB3316
Sicilian Defense: Lasker-Pelikan Variation, Sveshnikov VariationB3320
Sicilian Defense: Lasker-Pelikan Variation, Sveshnikov Variation, Chelyabinsk VariationB3317
Sicilian Defense: Lasker-Pelikan Variation, Sveshnikov Variation, Novosibirsk VariationB3320
Sicilian Defense: Lasker-Pelikan Variation, Sveshnikov Variation, Peresypkin's SacrificeB3321
Sicilian Defense: OpenB338
Sicilian Defense: Accelerated Dragon, Exchange VariationB349
Sicilian Defense: Accelerated Dragon, Modern VariationB349
Sicilian Defense: Accelerated Dragon, Modern Bc4 VariationB3513
Sicilian Defense: Dragon Variation, Modern Bc4 VariationB3514
Sicilian Defense: Accelerated Dragon, Maróczy BindB369
Sicilian Defense: Accelerated Dragon, Maróczy Bind, Gurgenidze VariationB3614
Sicilian Defense: Accelerated Dragon, Maróczy BindB3710
Sicilian Defense: Accelerated Dragon, Simagin VariationB3714
Sicilian Defense: Accelerated Dragon, Maróczy BindB3811
Sicilian Defense: Accelerated Dragon, Maróczy Bind, Breyer VariationB3914
Sicilian Defense: Alapin Variation, Sherzer VariationB4010
Sicilian Defense: Delayed Alapin Variation, with e6B405
Sicilian Defense: Drazic VariationB406
Sicilian Defense: French VariationB404
Sicilian Defense: French Variation, NormalB408
Sicilian Defense: French Variation, OpenB406
Sicilian Defense: French Variation, Westerinen AttackB405
Sicilian Defense: Gaw-Paw VariationB4010
Sicilian Defense: Kan Variation, Wing Attack, Fianchetto VariationB4011
Sicilian Defense: Kramnik VariationB405
Sicilian Defense: Kveinis VariationB408
Sicilian Defense: Marshall CounterattackB406
Sicilian Defense: Paulsen-Basman DefenseB408
Sicilian Defense: Pin VariationB4010
Sicilian Defense: Pin Variation, Jaffe VariationB4012
Sicilian Defense: Pin Variation, Koch VariationB4011
Sicilian Defense: Smith-Morra Gambit DeferredB407
Sicilian Defense: Wing Gambit DeferredB405
Sicilian Defense: Kan VariationB418
Sicilian Defense: Kan Variation, Maróczy Bind, Bronstein VariationB4114
Sicilian Defense: Kan Variation, Maróczy Bind, Bronstein VariationB4115
Sicilian Defense: Kan Variation, Maróczy Bind, Hedgehog VariationB4110
Sicilian Defense: Kan Variation, Maróczy Bind, Réti VariationB419
Sicilian Defense: Kan Variation, Gipslis VariationB4214
Sicilian Defense: Kan Variation, Modern VariationB429
Sicilian Defense: Kan Variation, Polugaevsky VariationB4210
Sicilian Defense: Kan Variation, Swiss Cheese VariationB4210
Sicilian Defense: Kan Variation, Knight VariationB439
Sicilian Defense: Kan Variation, Wing AttackB4310
Sicilian Defense: Kan Variation, Wing Attack, Christiansen's DreamB4315
Sicilian Defense: Kan Variation, Wing Attack, Spraggett AttackB4313
Sicilian Defense: Taimanov VariationB448
Sicilian Defense: Taimanov Variation, Gary GambitB4416
Sicilian Defense: Taimanov Variation, Modern LineB4420

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