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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.

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 DefenseNimzowitsch DefenseOwen DefensePirc DefenseRat DefenseSt. George DefenseVan Geet OpeningWare Defense83
B01Scandinavian DefenseVan Geet Opening46
B02Alekhine Defense27
B03Alekhine Defense18
B04Alekhine Defense6
B05Alekhine Defense5
B06Modern DefensePterodactyl DefenseRat Defense45
B07Czech DefenseKing's Pawn GameLion DefenseModern DefensePirc Defense17
B08Pirc Defense7
B09Pirc Defense8
B10Caro-Kann Defense29
B11Caro-Kann Defense3
B12Caro-Kann Defense24
B13Caro-Kann Defense15
B14Caro-Kann Defense7
B15Caro-Kann Defense13
B16Caro-Kann Defense2
B17Caro-Kann Defense8
B18Caro-Kann Defense5
B19Caro-Kann Defense4
B20Sicilian Defense27
B21Bird OpeningSicilian Defense37
B22Sicilian Defense15
B23Sicilian Defense11
B24Sicilian Defense4
B25Sicilian Defense5
B26Sicilian Defense1
B27Modern DefensePterodactyl DefenseSicilian Defense23
B28Sicilian Defense20
B29Sicilian Defense5
B30Sicilian Defense9
B31Sicilian Defense5
B32Sicilian Defense11
B33Sicilian Defense11
B34Sicilian Defense2
B35Sicilian Defense2
B36Sicilian Defense2
B37Sicilian Defense2
B38Sicilian Defense1
B39Sicilian Defense1
B40Sicilian Defense18
B41Sicilian Defense5
B42Sicilian Defense4
B43Sicilian Defense4
B44Sicilian Defense4
B45Sicilian Defense6
B46Sicilian Defense1
B47Sicilian Defense2
B48Sicilian Defense1
B49Sicilian Defense1
B50Sicilian Defense12
B51Sicilian Defense3
B52Sicilian Defense3
B53Sicilian Defense2
B54Sicilian Defense4
B55Sicilian Defense1
B56Sicilian Defense5
B57Sicilian Defense3
B58Sicilian Defense4
B59Sicilian Defense1
B60Sicilian Defense3
B61Sicilian Defense1
B62Sicilian Defense5
B63Sicilian Defense4
B64Sicilian Defense2
B65Sicilian Defense2
B66Sicilian Defense1
B67Sicilian Defense1
B68Sicilian Defense1
B69Sicilian Defense1
B70Sicilian Defense3
B71Sicilian Defense2
B72Sicilian Defense6
B73Sicilian Defense3
B74Sicilian Defense7
B75Sicilian Defense3
B76Sicilian Defense4
B77Sicilian Defense7
B78Sicilian Defense4
B79Sicilian Defense2
B80Sicilian Defense4
B81Sicilian Defense1
B82Sicilian Defense2
B83Sicilian Defense4
B84Sicilian Defense3
B85Sicilian Defense4
B86Sicilian Defense1
B87Sicilian Defense1
B88Sicilian Defense2
B89Sicilian Defense3
B90Sicilian Defense15
B91Sicilian Defense1
B92Sicilian Defense4
B93Sicilian Defense1
B94Sicilian Defense2
B95Sicilian Defense1
B96Sicilian Defense4
B97Sicilian Defense2
B98Sicilian Defense4
B99Sicilian Defense1

Other volumes

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