ecocodes

B Semi-open games

Volume B spreads 781 named lines over its 100 codes, from 25 openings. Of these, 779 open with 1.e4, and after that the commonest replies are 1...c5 (409), 1...c6 (110), 1...Nf6 (56). The busiest code is B00 with 83 lines; 20 codes hold a single line. The deepest line in the volume, Sicilian Defense: Dragon Variation, Classical Variation, Stockholm Attack (B74), runs to 14.g4.

The hundred codes of volume B

  1. B00Nimzowitsch Defense
  2. B01Scandinavian Defense
  3. B02Alekhine Defense
  4. B03Alekhine Defense
  5. B04Alekhine Defense
  6. B05Alekhine Defense
  7. B06Modern Defense
  8. B07Pirc Defense
  9. B08Pirc Defense
  10. B09Pirc Defense
  11. B10Caro-Kann Defense
  12. B11Caro-Kann Defense
  13. B12Caro-Kann Defense
  14. B13Caro-Kann Defense
  15. B14Caro-Kann Defense
  16. B15Caro-Kann Defense
  17. B16Caro-Kann Defense
  18. B17Caro-Kann Defense
  19. B18Caro-Kann Defense
  20. B19Caro-Kann Defense
  21. B20Sicilian Defense
  22. B21Sicilian Defense
  23. B22Sicilian Defense
  24. B23Sicilian Defense
  25. B24Sicilian Defense
  26. B25Sicilian Defense
  27. B26Sicilian Defense
  28. B27Sicilian Defense
  29. B28Sicilian Defense
  30. B29Sicilian Defense
  31. B30Sicilian Defense
  32. B31Sicilian Defense
  33. B32Sicilian Defense
  34. B33Sicilian Defense
  35. B34Sicilian Defense
  36. B35Sicilian Defense
  37. B36Sicilian Defense
  38. B37Sicilian Defense
  39. B38Sicilian Defense
  40. B39Sicilian Defense
  41. B40Sicilian Defense
  42. B41Sicilian Defense
  43. B42Sicilian Defense
  44. B43Sicilian Defense
  45. B44Sicilian Defense
  46. B45Sicilian Defense
  47. B46Sicilian Defense
  48. B47Sicilian Defense
  49. B48Sicilian Defense
  50. B49Sicilian Defense
  51. B50Sicilian Defense
  52. B51Sicilian Defense
  53. B52Sicilian Defense
  54. B53Sicilian Defense
  55. B54Sicilian Defense
  56. B55Sicilian Defense
  57. B56Sicilian Defense
  58. B57Sicilian Defense
  59. B58Sicilian Defense
  60. B59Sicilian Defense
  61. B60Sicilian Defense
  62. B61Sicilian Defense
  63. B62Sicilian Defense
  64. B63Sicilian Defense
  65. B64Sicilian Defense
  66. B65Sicilian Defense
  67. B66Sicilian Defense
  68. B67Sicilian Defense
  69. B68Sicilian Defense
  70. B69Sicilian Defense
  71. B70Sicilian Defense
  72. B71Sicilian Defense
  73. B72Sicilian Defense
  74. B73Sicilian Defense
  75. B74Sicilian Defense
  76. B75Sicilian Defense
  77. B76Sicilian Defense
  78. B77Sicilian Defense
  79. B78Sicilian Defense
  80. B79Sicilian Defense
  81. B80Sicilian Defense
  82. B81Sicilian Defense
  83. B82Sicilian Defense
  84. B83Sicilian Defense
  85. B84Sicilian Defense
  86. B85Sicilian Defense
  87. B86Sicilian Defense
  88. B87Sicilian Defense
  89. B88Sicilian Defense
  90. B89Sicilian Defense
  91. B90Sicilian Defense
  92. B91Sicilian Defense
  93. B92Sicilian Defense
  94. B93Sicilian Defense
  95. B94Sicilian Defense
  96. B95Sicilian Defense
  97. B96Sicilian Defense
  98. B97Sicilian Defense
  99. B98Sicilian Defense
  100. B99Sicilian Defense

First moves

First moveLinesShare
1.e4779100%
1.d420%

Openings with most lines here

  1. Sicilian Defense 400
  2. Caro-Kann Defense 110
  3. Alekhine Defense 56
  4. Scandinavian Defense 45
  5. Nimzowitsch Defense 43
  6. Pirc Defense 28
  7. Modern Defense 28
  8. Pterodactyl Defense 25
  9. Owen Defense 8
  10. Lion Defense 6
  11. Rat Defense 6
  12. Borg Defense 4
  13. St. George Defense 4
  14. Carr Defense 2
  15. Goldsmith Defense 2
  16. Hippopotamus Defense 2
  17. King’s Pawn Game 2
  18. Van Geet Opening 2
  19. Ware Defense 2
  20. Barnes Defense 1
  21. Duras Gambit 1
  22. Fried Fox Defense 1
  23. Lemming Defense 1
  24. Czech Defense 1
  25. Bird Opening 1

Every code in volume B

Each code’s reference line is its shortest named line; “Deepest” is the length in plies of its longest.

CodeReference lineMovesLinesDeepest
B00King’s Pawn Game1.e48312
B01Scandinavian Defense1.e4 d54614
B02Alekhine Defense1.e4 Nf62715
B03Alekhine Defense1.e4 Nf6 2.e5 Nd5 3.d41822
B04Alekhine Defense: Modern Variation1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Nf3613
B05Alekhine Defense: Modern Variation, Main Line1.e4 Nf6 2.e5 Nd5 3.d4 d6 4.Nf3 Bg4511
B06Modern Defense1.e4 g64512
B07King’s Pawn Game: Maróczy Defense1.e4 d6 2.d4 e51714
B08Pirc Defense: Classical Variation1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.Nf3712
B09Pirc Defense: Austrian Attack1.e4 d6 2.d4 Nf6 3.Nc3 g6 4.f4813
B10Caro-Kann Defense1.e4 c62915
B11Caro-Kann Defense: Two Knights Attack, Mindeno Variation1.e4 c6 2.Nc3 d5 3.Nf3 Bg438
B12Caro-Kann Defense1.e4 c6 2.d42413
B13Caro-Kann Defense: Exchange Variation1.e4 c6 2.d4 d5 3.exd51514
B14Caro-Kann Defense: Panov Attack1.e4 c6 2.d4 d5 3.exd5 cxd5 4.c4 Nf6 5.Nc3 e6719
B15Caro-Kann Defense1.e4 c6 2.d4 d5 3.Nc31316
B16Caro-Kann Defense: Finnish Variation1.e4 c6 2.d4 d5 3.Nd2 dxe4 4.Nxe4 h6210
B17Caro-Kann Defense: Karpov Variation1.e4 c6 2.d4 d5 3.Nd2 dxe4 4.Nxe4 Nd7819
B18Caro-Kann Defense: Classical Variation1.e4 c6 2.d4 d5 3.Nd2 dxe4 4.Nxe4 Bf5513
B19Caro-Kann Defense: Classical Variation1.e4 c6 2.d4 d5 3.Nd2 dxe4 4.Nxe4 Bf5 5.Ng3 Bg6 6.h4 h6 7.Nf3 Nd7424
B20Sicilian Defense1.e4 c52714
B21Sicilian Defense: McDonnell Attack1.e4 c5 2.f44218
B22Sicilian Defense: Alapin Variation1.e4 c5 2.c31518
B23Sicilian Defense: Closed1.e4 c5 2.Nc31411
B24Sicilian Defense: Closed, Fianchetto Variation1.e4 c5 2.Nc3 Nc6 3.g3413
B25Sicilian Defense: Closed1.e4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.d3 d6514
B26Sicilian Defense: Closed1.e4 c5 2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.d3 d6 6.Be3111
B27Sicilian Defense1.e4 c5 2.Nf32312
B28Sicilian Defense: O’Kelly Variation1.e4 c5 2.Nf3 a6208
B29Sicilian Defense: Nimzowitsch Variation1.e4 c5 2.Nf3 Nf6512
B30Sicilian Defense: Old Sicilian1.e4 c5 2.Nf3 Nc6912
B31Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Fianchetto Variation1.e4 c5 2.Nf3 Nc6 3.Bb5 g6511
B32Sicilian Defense: Open1.e4 c5 2.Nf3 Nc6 3.d41110
B33Sicilian Defense: Open1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf61121
B34Sicilian Defense: Accelerated Dragon, Exchange Variation1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6 5.Nxc629
B35Sicilian Defense: Accelerated Dragon, Modern Bc4 Variation1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6 5.Nc3 Bg7 6.Be3 Nf6 7.Bc4214
B36Sicilian Defense: Accelerated Dragon, Maróczy Bind1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6 5.c4214
B37Sicilian Defense: Accelerated Dragon, Maróczy Bind1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6 5.c4 Bg7214
B38Sicilian Defense: Accelerated Dragon, Maróczy Bind1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6 5.c4 Bg7 6.Be3111
B39Sicilian Defense: Accelerated Dragon, Maróczy Bind, Breyer Variation1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 g6 5.c4 Bg7 6.Be3 Nf6 7.Nc3 Ng4114
B40Sicilian Defense: French Variation1.e4 c5 2.Nf3 e61812
B41Sicilian Defense: Kan Variation1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6515
B42Sicilian Defense: Kan Variation, Modern Variation1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.Bd3414
B43Sicilian Defense: Kan Variation, Knight Variation1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 a6 5.Nc3515
B44Sicilian Defense: Taimanov Variation1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6420
B45Sicilian Defense: Taimanov Variation1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3613
B46Sicilian Defense: Taimanov Variation1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 a6110
B47Sicilian Defense: Taimanov Variation, Bastrikov Variation1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 Qc7215
B48Sicilian Defense: Taimanov Variation, Bastrikov Variation, English Attack1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 Qc7 6.Be3111
B49Sicilian Defense: Taimanov Variation, Bastrikov Variation1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nc6 5.Nc3 Qc7 6.Be3 a6 7.Be2113
B50Sicilian Defense: Modern Variations1.e4 c5 2.Nf3 d61217
B51Sicilian Defense: Moscow Variation1.e4 c5 2.Nf3 d6 3.Bb5+317
B52Sicilian Defense: Moscow Variation, Main Line1.e4 c5 2.Nf3 d6 3.Bb5+ Bd7313
B53Sicilian Defense: Chekhover Variation1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Qxd4210
B54Sicilian Defense: Dragon Variation, Accelerated Dragon1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 g649
B55Sicilian Defense: Prins Variation, Venice Attack1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.f3 e5 6.Bb5+111
B56Sicilian Defense: Classical Variation1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6511
B57Sicilian Defense: Classical Variation, Sozin Attack1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bc4315
B58Sicilian Defense: Classical Variation1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Be2414
B59Sicilian Defense: Boleslavsky Variation1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 d6 6.Be2 e5 7.Nb3113
B60Sicilian Defense: Richter-Rauzer Variation1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5312
B61Sicilian Defense: Richter-Rauzer Variation, Modern Variation1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 d6 6.Bg5 Bd7 7.Qd2113
B62Sicilian Defense: Richter-Rauzer Variation1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 e6513
B63Sicilian Defense: Richter-Rauzer Variation, Traditional Variation1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Qd2420
B64Sicilian Defense: Richter-Rauzer Variation, Classical Variation1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Qd2 Be7 8.O-O-O O-O 9.f4218
B65Sicilian Defense: Richter-Rauzer Variation, Rauzer Attack1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Qd2 Be7 8.O-O-O O-O 9.f4 Nxd4219
B66Sicilian Defense: Richter-Rauzer Variation, Neo-Modern Variation, Early Deviations1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 Nc6 6.Bg5 e6 7.Qd2 a6114
B67Sicilian Defense: Richter-Rauzer Variation, Neo-Modern Variation1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 d6 6.Bg5 e6 7.Qd2 a6 8.O-O-O Bd7116
B68Sicilian Defense: Richter-Rauzer Variation, Neo-Modern Variation1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 d6 6.Bg5 e6 7.Qd2 a6 8.O-O-O Bd7 9.f4 Be7118
B69Sicilian Defense: Richter-Rauzer Variation, Neo-Modern Variation, Nyezhmetdinov Attack1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 d6 6.Bg5 e6 7.Qd2 a6 8.O-O-O Bd7 9.f4 Be7 10.Nf3 b5 11.Bxf6121
B70Sicilian Defense: Dragon Variation1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6311
B71Sicilian Defense: Dragon Variation, Levenfish Variation1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.f4212
B72Sicilian Defense: Dragon Variation1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3617
B73Sicilian Defense: Dragon Variation, Classical Variation1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be2 Bg7 7.O-O Nc6 8.Be3319
B74Sicilian Defense: Dragon Variation, Classical Variation, Normal Line1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be2 Bg7 7.O-O O-O 8.Be3 Nc6 9.Nb3727
B75Sicilian Defense: Dragon Variation, Yugoslav Attack, Early Deviations1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.f3314
B76Sicilian Defense: Dragon Variation, Yugoslav Attack1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.f3 O-O417
B77Sicilian Defense: Dragon Variation, Yugoslav Attack, Main Line1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.f3 O-O 8.Qd2 Nc6 9.Bc4722
B78Sicilian Defense: Dragon Variation, Yugoslav Attack1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.f3 O-O 8.Qd2 Nc6 9.Bc4 Bd7 10.O-O-O423
B79Sicilian Defense: Dragon Variation, Yugoslav Attack1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 g6 6.Be3 Bg7 7.f3 O-O 8.Qd2 Nc6 9.Bc4 Bd7 10.h4 Qa5 11.O-O-O Rfc8 12.Bb3224
B80Sicilian Defense: Scheveningen Variation1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 d6413
B81Sicilian Defense: Scheveningen Variation, Keres Attack1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 d6 6.g4111
B82Sicilian Defense: Scheveningen Variation, Matanovic Attack1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 d6 6.f4215
B83Sicilian Defense: Scheveningen Variation, Classical Variation1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 d6 6.Be2419
B84Sicilian Defense: Scheveningen Variation, Classical Variation1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Be2 e6314
B85Sicilian Defense: Scheveningen Variation, Classical Variation, Paulsen Variation1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.f4 e6 7.Be2 Qc7 8.O-O Nc6420
B86Sicilian Defense: Sozin Attack1.e4 c5 2.Nf3 e6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 d6 6.Bc4111
B87Sicilian Defense: Sozin Attack, Flank Variation1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bc4 e6 7.Bb3 b5114
B88Sicilian Defense: Sozin Attack, Leonhardt Variation1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 d6 6.Bc4 e6217
B89Sicilian Defense: Sozin Attack, Main Line1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 d6 6.Bc4 e6 7.Be3320
B90Sicilian Defense: Najdorf Variation1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a61517
B91Sicilian Defense: Najdorf Variation, Zagreb Variation1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.g3111
B92Sicilian Defense: Najdorf Variation, Opocensky Variation1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Be2416
B93Sicilian Defense: Najdorf Variation, Amsterdam Variation1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.f4111
B94Sicilian Defense: Najdorf Variation1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5223
B95Sicilian Defense: Najdorf Variation1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6112
B96Sicilian Defense: Najdorf Variation1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.f4419
B97Sicilian Defense: Najdorf Variation, Poisoned Pawn Variation1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.f4 Qb6218
B98Sicilian Defense: Najdorf Variation1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.f4 Be7418
B99Sicilian Defense: Najdorf Variation, Main Line1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.f4 Be7 8.Qf3 Qc7 9.O-O-O Nbd7118