ecocodes

D Closed and semi-closed games

Volume D spreads 644 named lines over its 100 codes, from 13 openings. Of these, 636 open with 1.d4, and after that the commonest replies are 1...d5 (461), 1...Nf6 (172), 1...g6 (2). The busiest code is D00 with 72 lines; 18 codes hold a single line. The deepest line in the volume, Semi-Slav Defense: Meran Variation, Rellstab Attack (D49), runs to 15.Bg5.

The hundred codes of volume D

  1. D00Blackmar-Diemer Gambit
  2. D01Richter-Veresov Attack
  3. D02Queen’s Pawn Game
  4. D03Queen’s Pawn Game
  5. D04Queen’s Pawn Game
  6. D05Queen’s Pawn Game
  7. D06Queen’s Gambit
  8. D07Queen’s Gambit
  9. D08Queen’s Gambit
  10. D09Queen’s Gambit
  11. D10Slav Defense
  12. D11Slav Defense
  13. D12Slav Defense
  14. D13Slav Defense
  15. D14Slav Defense
  16. D15Slav Defense
  17. D16Slav Defense
  18. D17Slav Defense
  19. D18Slav Defense
  20. D19Slav Defense
  21. D20Queen’s Gambit
  22. D21Queen’s Gambit
  23. D22Queen’s Gambit
  24. D23Queen’s Gambit
  25. D24Queen’s Gambit
  26. D25Queen’s Gambit
  27. D26Queen’s Gambit
  28. D27Queen’s Gambit
  29. D28Queen’s Gambit
  30. D29Queen’s Gambit
  31. D30Queen’s Gambit
  32. D31Semi-Slav Defense
  33. D32Tarrasch Defense
  34. D33Tarrasch Defense
  35. D34Tarrasch Defense
  36. D35Queen’s Gambit
  37. D36Queen’s Gambit
  38. D37Queen’s Gambit
  39. D38Queen’s Gambit
  40. D39Queen’s Gambit
  41. D40Queen’s Gambit
  42. D41Queen’s Gambit
  43. D42Queen’s Gambit
  44. D43Semi-Slav Defense
  45. D44Semi-Slav Defense
  46. D45Semi-Slav Defense
  47. D46Semi-Slav Defense
  48. D47Semi-Slav Defense
  49. D48Semi-Slav Defense
  50. D49Semi-Slav Defense
  51. D50Queen’s Gambit
  52. D51Queen’s Gambit
  53. D52Queen’s Gambit
  54. D53Queen’s Gambit
  55. D54Queen’s Gambit
  56. D55Queen’s Gambit
  57. D56Queen’s Gambit
  58. D57Queen’s Gambit
  59. D58Queen’s Gambit
  60. D59Queen’s Gambit
  61. D60Queen’s Gambit
  62. D61Queen’s Gambit
  63. D62Queen’s Gambit
  64. D63Queen’s Gambit
  65. D64Queen’s Gambit
  66. D65Queen’s Gambit
  67. D66Queen’s Gambit
  68. D67Queen’s Gambit
  69. D68Queen’s Gambit
  70. D69Queen’s Gambit
  71. D70Neo-Grünfeld Defense
  72. D71Neo-Grünfeld Defense
  73. D72Neo-Grünfeld Defense
  74. D73Neo-Grünfeld Defense
  75. D74Neo-Grünfeld Defense
  76. D75Neo-Grünfeld Defense
  77. D76Neo-Grünfeld Defense
  78. D77Neo-Grünfeld Defense
  79. D78Neo-Grünfeld Defense
  80. D79Neo-Grünfeld Defense
  81. D80Grünfeld Defense
  82. D81Grünfeld Defense
  83. D82Grünfeld Defense
  84. D83Grünfeld Defense
  85. D84Grünfeld Defense
  86. D85Grünfeld Defense
  87. D86Grünfeld Defense
  88. D87Grünfeld Defense
  89. D88Grünfeld Defense
  90. D89Grünfeld Defense
  91. D90Grünfeld Defense
  92. D91Grünfeld Defense
  93. D92Grünfeld Defense
  94. D93Grünfeld Defense
  95. D94Grünfeld Defense
  96. D95Grünfeld Defense
  97. D96Grünfeld Defense
  98. D97Grünfeld Defense
  99. D98Grünfeld Defense
  100. D99Grünfeld Defense

First moves

First moveLinesShare
1.d463699%
1.Nf351%
1.c430%

Openings with most lines here

  1. Queen’s Gambit 275
  2. Semi-Slav Defense 73
  3. Queen’s Pawn Game 66
  4. Grünfeld Defense 57
  5. Slav Defense 52
  6. Blackmar-Diemer Gambit 49
  7. Tarrasch Defense 27
  8. Neo-Grünfeld Defense 25
  9. Richter-Veresov Attack 8
  10. Rubinstein Opening 6
  11. Rapport-Jobava System 4
  12. Amazon Attack 1
  13. London System 1

Every code in volume D

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

CodeReference lineMovesLinesDeepest
D00Queen’s Pawn Game1.d4 d57217
D01Richter-Veresov Attack1.d4 Nf6 2.Nc3 d5 3.Bg51211
D02Queen’s Pawn Game: Zukertort Variation1.d4 d5 2.Nf32011
D03Queen’s Pawn Game: Torre Attack1.d4 d5 2.Nf3 Nf6 3.Bg51412
D04Queen’s Pawn Game: Colle System1.d4 d5 2.Nf3 Nf6 3.e338
D05Queen’s Pawn Game: Colle System1.d4 d5 2.Nf3 Nf6 3.e3 e61516
D06Queen’s Gambit1.d4 d5 2.c41310
D07Queen’s Gambit Declined: Chigorin Defense1.d4 d5 2.c4 Nc61315
D08Queen’s Gambit Declined: Albin Countergambit1.d4 d5 2.c4 e5916
D09Queen’s Gambit Declined: Albin Countergambit, Fianchetto Variation1.d4 d5 2.c4 e5 3.dxe5 d4 4.Nf3 Nc6 5.g3410
D10Slav Defense1.d4 d5 2.c4 c699
D11Slav Defense: Modern Line1.d4 d5 2.c4 c6 3.Nf3811
D12Slav Defense: Quiet Variation, Schallopp Defense1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.e3 Bf5415
D13Slav Defense: Exchange Variation1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.cxd5 cxd5211
D14Slav Defense: Exchange Variation, Symmetrical Line1.d4 d5 2.c4 c6 3.cxd5 cxd5 4.Nc3 Nf6 5.Nf3 Nc6 6.Bf4 Bf5216
D15Slav Defense: Three Knights Variation1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc31011
D16Slav Defense: Alapin Variation1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4410
D17Slav Defense: Czech Variation1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Bf5822
D18Slav Defense: Czech Variation, Classical System1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Bf5 6.e3212
D19Slav Defense: Czech Variation, Dutch Variation1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 dxc4 5.a4 Bf5 6.e3 e6 7.Bxc4 Bb4 8.O-O319
D20Queen’s Gambit Accepted1.d4 d5 2.c4 dxc41711
D21Queen’s Gambit Accepted: Normal Variation1.d4 d5 2.c4 dxc4 3.Nf367
D22Queen’s Gambit Accepted: Alekhine Defense1.d4 d5 2.c4 dxc4 3.Nf3 a6311
D23Queen’s Gambit Accepted1.d4 d5 2.c4 dxc4 3.Nf3 Nf6411
D24Queen’s Gambit Accepted: Showalter Variation1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.Nc3513
D25Queen’s Gambit Accepted: Normal Variation1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e348
D26Queen’s Gambit Accepted: Normal Variation, Traditional System1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e61119
D27Queen’s Gambit Accepted: Classical Defense, Main Line1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 6.O-O a6716
D28Queen’s Gambit Accepted: Classical Defense, Alekhine System1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 6.O-O a6 7.Qe2326
D29Queen’s Gambit Accepted: Classical Defense, Alekhine System, Main Line1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 6.O-O a6 7.Qe2 b5 8.Bb3 Bb7320
D30Queen’s Gambit Declined1.d4 d5 2.c4 e61412
D31Queen’s Gambit Declined: Queen’s Knight Variation1.d4 d5 2.c4 e6 3.Nc32118
D32Tarrasch Defense1.d4 d5 2.c4 e6 3.Nc3 c51314
D33Tarrasch Defense: Rubinstein System1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.Nf3 Nc6 6.g3616
D34Tarrasch Defense: Prague Variation, Main Line1.d4 d5 2.c4 e6 3.Nc3 c5 4.cxd5 exd5 5.Nf3 Nc6 6.g3 Nf6 7.Bg2 Be71324
D35Queen’s Gambit Declined: Normal Defense1.d4 d5 2.c4 e6 3.Nc3 Nf61319
D36Queen’s Gambit Declined: Exchange Variation, Reshevsky Variation1.d4 Nf6 2.c4 e6 3.Nc3 d5 4.cxd5 exd5 5.Bg5 c6 6.Qc21021
D37Queen’s Gambit Declined: Three Knights Variation1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc31519
D38Queen’s Gambit Declined: Ragozin Defense1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 Bb4312
D39Queen’s Gambit Declined: Ragozin Defense, Vienna Variation1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 Bb4 5.Bg5 dxc4110
D40Queen’s Gambit Declined: Semi-Tarrasch Defense1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 c5619
D41Queen’s Gambit Declined: Semi-Tarrasch Defense1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 c5 5.cxd51021
D42Queen’s Gambit Declined: Semi-Tarrasch Defense, Main Line1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 c5 5.cxd5 Nxd5 6.e3 Nc6 7.Bd3113
D43Semi-Slav Defense1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 e6413
D44Semi-Slav Defense Accepted1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 e6 5.Bg5 dxc4721
D45Semi-Slav Defense: Main Line1.d4 d5 2.c4 c6 3.Nc3 Nf6 4.e3 e6 5.Nf31519
D46Semi-Slav Defense: Main Line1.d4 d5 2.c4 c6 3.Nc3 Nf6 4.e3 e6 5.Nf3 Nbd7 6.Bd31221
D47Semi-Slav Defense: Semi-Meran Variation1.d4 d5 2.c4 c6 3.Nc3 Nf6 4.e3 e6 5.Nf3 Nbd7 6.Bd3 dxc4 7.Bxc4625
D48Semi-Slav Defense: Meran Variation1.d4 d5 2.c4 c6 3.Nc3 Nf6 4.e3 e6 5.Nf3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 a6820
D49Semi-Slav Defense: Meran Variation, Blumenfeld Variation1.d4 d5 2.c4 c6 3.Nc3 Nf6 4.e3 e6 5.Nf3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 a6 9.e4 c5 10.e5 cxd4 11.Nxb5629
D50Queen’s Gambit Declined: Modern Variation1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5615
D51Queen’s Gambit Declined: Modern Variation, Knight Defense1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Nbd7713
D52Queen’s Gambit Declined1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 e6 5.Bg5 Nbd7 6.e3817
D53Queen’s Gambit Declined1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7914
D54Queen’s Gambit Declined: Neo-Orthodox Variation1.d4 Nf6 2.c4 e6 3.Nc3 d5 4.Bg5 Be7 5.e3 O-O 6.Rc1111
D55Queen’s Gambit Declined: Modern Variation, Normal Line1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 Be7 5.Bg5 O-O 6.e3621
D56Queen’s Gambit Declined: Lasker Defense1.d4 d5 2.c4 e6 3.Nc3 Be7 4.Nf3 Nf6 5.Bg5 h6 6.Bh4 O-O 7.e3 Ne4526
D57Queen’s Gambit Declined: Lasker Defense, Main Line1.d4 d5 2.c4 e6 3.Nc3 Be7 4.Nf3 Nf6 5.Bg5 h6 6.Bh4 O-O 7.e3 Ne4 8.Bxe7 Qxe7 9.cxd5 Nxc3 10.bxc3324
D58Queen’s Gambit Declined: Tartakower Defense1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 Be7 5.Bg5 h6 6.Bh4 O-O 7.e3 b6216
D59Queen’s Gambit Declined: Tartakower Defense, Makogonov Exchange Variation1.d4 d5 2.c4 e6 3.Nc3 Be7 4.Nf3 Nf6 5.Bg5 h6 6.Bh4 O-O 7.e3 b6 8.cxd5 Nxd5222
D60Queen’s Gambit Declined: Orthodox Defense1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 Be7 5.Bg5 O-O 6.e3 Nbd7414
D61Queen’s Gambit Declined: Orthodox Defense, Rubinstein Variation1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 Nbd7 7.Qc2618
D62Queen’s Gambit Declined: Orthodox Defense, Rubinstein Variation, Flohr Line1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 Be7 5.Bg5 O-O 6.e3 Nbd7 7.Qc2 c5 8.cxd5115
D63Queen’s Gambit Declined: Orthodox Defense, Main Line1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 Be7 5.Bg5 O-O 6.e3 Nbd7 7.Rc11017
D64Queen’s Gambit Declined: Orthodox Defense, Rubinstein Attack1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 Be7 5.Bg5 O-O 6.e3 Nbd7 7.Rc1 c6 8.Qc2417
D65Queen’s Gambit Declined: Orthodox Defense, Rubinstein Attack1.d4 d5 2.Nf3 Nf6 3.c4 e6 4.Nc3 Be7 5.Bg5 O-O 6.e3 Nbd7 7.Rc1 c6 8.Qc2 a6 9.cxd5219
D66Queen’s Gambit Declined: Orthodox Defense, Bd3 Line1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 Nbd7 7.Rc1 c6 8.Bd3318
D67Queen’s Gambit Declined: Orthodox Defense, Capablanca System1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 Nbd7 7.Rc1 c6 8.Bd3 dxc4 9.Bxc4 Nd5521
D68Queen’s Gambit Declined: Orthodox Defense, Classical Variation1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 Nbd7 7.Rc1 c6 8.Bd3 dxc4 9.Bxc4 Nd5 10.Bxe7 Qxe7 11.O-O Nxc3 12.Rxc3 e5325
D69Queen’s Gambit Declined: Orthodox Defense, Classical Variation1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 Nbd7 7.Rc1 c6 8.Bd3 dxc4 9.Bxc4 Nd5 10.Bxe7 Qxe7 11.O-O Nxc3 12.Rxc3 e5 13.dxe5 Nxe5 14.Nxe5 Qxe5128
D70Neo-Grünfeld Defense: Goglidze Attack1.d4 Nf6 2.c4 g6 3.f3 d536
D71Neo-Grünfeld Defense: Exchange Variation1.d4 Nf6 2.c4 g6 3.g3 Bg7 4.Bg2 d5 5.cxd5 Nxd5211
D72Neo-Grünfeld Defense: with g31.d4 Nf6 2.c4 g6 3.g3 d5 4.Bg2 Bg7 5.cxd5 Nxd5 6.e4 Nb6 7.Ne2113
D73Neo-Grünfeld Defense: with g31.d4 Nf6 2.c4 g6 3.g3 d5 4.Bg2 Bg7 5.Nf319
D74Neo-Grünfeld Defense: Delayed Exchange Variation1.d4 Nf6 2.c4 g6 3.Nf3 Bg7 4.g3 O-O 5.Bg2 d5 6.cxd5 Nxd5 7.O-O113
D75Neo-Grünfeld Defense: Delayed Exchange Variation1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 O-O 5.g3 d5 6.cxd5 Nxd5 7.Bg2 c5 8.O-O215
D76Neo-Grünfeld Defense: Delayed Exchange Variation1.d4 Nf6 2.c4 g6 3.Nf3 Bg7 4.g3 O-O 5.Bg2 d5 6.cxd5 Nxd5 7.O-O Nb6114
D77Neo-Grünfeld Defense: Classical Variation1.d4 Nf6 2.Nf3 g6 3.g3 Bg7 4.Bg2 O-O 5.O-O d5 6.c4312
D78Neo-Grünfeld Defense: Classical Variation, Original Defense1.d4 Nf6 2.c4 g6 3.Nf3 Bg7 4.g3 O-O 5.Bg2 c6 6.O-O d5112
D79Neo-Grünfeld Defense: Ultra-Delayed Exchange Variation1.d4 Nf6 2.c4 g6 3.Nf3 Bg7 4.g3 O-O 5.Bg2 c6 6.O-O d5 7.cxd5 cxd51017
D80Grünfeld Defense1.d4 Nf6 2.c4 g6 3.Nc3 d5712
D81Grünfeld Defense: Russian Variation, Accelerated Variation1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Qb317
D82Grünfeld Defense: Brinckmann Attack1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Bf417
D83Grünfeld Defense: Brinckmann Attack, Grünfeld Gambit1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Bf4 Bg7 5.e3 O-O414
D84Grünfeld Defense: Brinckmann Attack, Grünfeld Gambit Accepted1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Bf4 Bg7 5.e3 O-O 6.cxd5 Nxd5 7.Nxd5 Qxd5 8.Bxc7115
D85Grünfeld Defense: Exchange Variation1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5720
D86Grünfeld Defense: Exchange Variation, Classical Variation1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Bc4518
D87Grünfeld Defense: Exchange Variation, Spassky Variation1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Bc4 c5 8.Ne2 O-O223
D88Grünfeld Defense: Exchange Variation, Spassky Variation1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Bc4 c5 8.Ne2 Nc6 9.Be3 O-O 10.O-O cxd4 11.cxd4121
D89Grünfeld Defense: Exchange Variation, Spassky Variation1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Bc4 c5 8.Ne2 Nc6 9.Be3 O-O 10.O-O Bg4 11.f3 Na5 12.Bd3 cxd4 13.cxd4 Be6227
D90Grünfeld Defense: Three Knights Variation1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf339
D91Grünfeld Defense: Three Knights Variation, Petrosian System1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Bg519
D92Grünfeld Defense: Three Knights Variation, Hungarian Attack1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Bf419
D93Grünfeld Defense: Three Knights Variation, Hungarian Variation1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Bf4 O-O 6.e3111
D94Grünfeld Defense: Three Knights Variation, Burille Variation1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.e3614
D95Grünfeld Defense: Three Knights Variation, Vienna Variation1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.e3 O-O 6.Qb3315
D96Grünfeld Defense: Russian Variation1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb319
D97Grünfeld Defense: Russian Variation1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb3 dxc4 6.Qxc4 O-O 7.e4614
D98Grünfeld Defense: Russian Variation, Smyslov Variation1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb3 dxc4 6.Qxc4 O-O 7.e4 Bg4221
D99Grünfeld Defense: Russian Variation, Smyslov Variation1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.Nf3 Bg7 5.Qb3 dxc4 6.Qxc4 O-O 7.e4 Bg4 8.Be3 Nfd7 9.Qb3218