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ECO Volume B: Semi-Open Games (other than the French Defense)

100 ECO codes, 772 named lines. Linked names have their own family guide on this site; unlinked names are listed for reference only.

What sets this volume apart

Volume B covers the semi-open games: most mainstream replies to 1.e4 other than 1...e5 (Volume C) - the Sicilian, Caro-Kann, Pirc, Modern, Scandinavian, Alekhine, and Nimzowitsch Defenses among them. What they share is asymmetry: rather than mirror White’s central pawn move, Black picks a different one on purpose, trading a level, drawish structure for real fighting chances on both sides.

All codes in Volume B

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ECO Volume B codes
CodeName(s)Lines
B00Barnes DefenseBorg DefenseCarr DefenseDuras GambitFried Fox DefenseGoldsmith DefenseHippopotamus DefenseKing’s Pawn GameLemming DefenseLion Defense: Lion’s JawNimzowitsch DefenseOwen DefensePirc DefenseRat DefenseSt. George DefenseVan Geet Opening: Berlin GambitWare Defense83
B01Scandinavian DefenseVan Geet Opening: Grünfeld Defense46
B02Alekhine Defense27
B03Alekhine Defense18
B04Alekhine Defense: Modern Variation6
B05Alekhine Defense: Modern Variation5
B06Modern DefensePterodactyl DefenseRat Defense: Accelerated Gurgenidze45
B07Czech DefenseKing’s Pawn Game: Maróczy DefenseLion Defense: Anti-PhilidorModern Defense: Geller’s SystemPirc Defense17
B08Pirc Defense: Classical Variation7
B09Pirc Defense: Austrian Attack8
B10Caro-Kann Defense29
B11Caro-Kann Defense: Two Knights Attack3
B12Caro-Kann Defense24
B13Caro-Kann Defense: Panov Attack15
B14Caro-Kann Defense: Panov Attack7
B15Caro-Kann Defense13
B16Caro-Kann Defense2
B17Caro-Kann Defense: Karpov Variation8
B18Caro-Kann Defense: Classical Variation5
B19Caro-Kann Defense: Classical Variation4
B20Sicilian Defense27
B21Bird Opening: Dutch VariationSicilian Defense: Smith-Morra Gambit Accepted37
B22Sicilian Defense: Alapin Variation15
B23Sicilian Defense: Closed11
B24Sicilian Defense: Closed4
B25Sicilian Defense: Closed5
B26Sicilian Defense: Closed1
B27Modern Defense: Pterodactyl VariationPterodactyl Defense: SicilianSicilian Defense23
B28Sicilian Defense: O’Kelly Variation20
B29Sicilian Defense: Nimzowitsch Variation5
B30Sicilian Defense9
B31Sicilian Defense: Nyezhmetdinov-Rossolimo Attack5
B32Sicilian Defense11
B33Sicilian Defense: Lasker-Pelikan Variation11
B34Sicilian Defense: Accelerated Dragon2
B35Sicilian Defense2
B36Sicilian Defense: Accelerated Dragon2
B37Sicilian Defense: Accelerated Dragon2
B38Sicilian Defense: Accelerated Dragon1
B39Sicilian Defense: Accelerated Dragon1
B40Sicilian Defense18
B41Sicilian Defense: Kan Variation5
B42Sicilian Defense: Kan Variation4
B43Sicilian Defense: Kan Variation4
B44Sicilian Defense: Taimanov Variation4
B45Sicilian Defense: Four Knights Variation6
B46Sicilian Defense: Taimanov Variation1
B47Sicilian Defense: Taimanov Variation2
B48Sicilian Defense: Taimanov Variation1
B49Sicilian Defense: Taimanov Variation1
B50Sicilian Defense12
B51Sicilian Defense: Moscow Variation3
B52Sicilian Defense: Moscow Variation3
B53Sicilian Defense: Chekhover Variation2
B54Sicilian Defense4
B55Sicilian Defense: Prins Variation1
B56Sicilian Defense5
B57Sicilian Defense: Classical Variation3
B58Sicilian Defense4
B59Sicilian Defense: Boleslavsky Variation1
B60Sicilian Defense: Richter-Rauzer Variation3
B61Sicilian Defense: Richter-Rauzer Variation1
B62Sicilian Defense: Richter-Rauzer Variation5
B63Sicilian Defense: Richter-Rauzer Variation4
B64Sicilian Defense: Richter-Rauzer Variation2
B65Sicilian Defense: Richter-Rauzer Variation2
B66Sicilian Defense: Richter-Rauzer Variation1
B67Sicilian Defense: Richter-Rauzer Variation1
B68Sicilian Defense: Richter-Rauzer Variation1
B69Sicilian Defense: Richter-Rauzer Variation1
B70Sicilian Defense: Dragon Variation3
B71Sicilian Defense: Dragon Variation2
B72Sicilian Defense: Dragon Variation6
B73Sicilian Defense: Dragon Variation3
B74Sicilian Defense: Dragon Variation7
B75Sicilian Defense: Dragon Variation3
B76Sicilian Defense: Dragon Variation4
B77Sicilian Defense: Dragon Variation7
B78Sicilian Defense: Dragon Variation4
B79Sicilian Defense: Dragon Variation2
B80Sicilian Defense: Scheveningen Variation4
B81Sicilian Defense: Scheveningen Variation1
B82Sicilian Defense: Scheveningen Variation2
B83Sicilian Defense: Scheveningen Variation4
B84Sicilian Defense: Scheveningen Variation3
B85Sicilian Defense: Scheveningen Variation4
B86Sicilian Defense: Sozin Attack1
B87Sicilian Defense: Sozin Attack1
B88Sicilian Defense: Sozin Attack2
B89Sicilian Defense: Sozin Attack3
B90Sicilian Defense: Najdorf Variation15
B91Sicilian Defense: Najdorf Variation1
B92Sicilian Defense: Najdorf Variation4
B93Sicilian Defense: Najdorf Variation1
B94Sicilian Defense: Najdorf Variation2
B95Sicilian Defense: Najdorf Variation1
B96Sicilian Defense: Najdorf Variation4
B97Sicilian Defense: Najdorf Variation2
B98Sicilian Defense: Najdorf Variation4
B99Sicilian Defense: Najdorf Variation1

Other volumes

Volume A · Volume C · Volume D · Volume E · All ECO families →