ecocodes
Volume D · Closed and semi-closed games‹ D73D75 ›
a1b2c3d4e5f6g7h8
Reference position · Black to move

D74 Neo-Grünfeld Defense: Delayed Exchange Variation

D74 holds a single named line. It leaves E60 (King’s Indian Defense: Fianchetto Variation) with 4...O-O 5.Bg2 d5 6.cxd5 Nxd5 7.O-O. Lines of two other codes continue from its position, the widest spread of the 10 Neo-Grünfeld Defense codes. Black, to move in that position, has 37 legal moves, the second-highest count of the 10 Neo-Grünfeld Defense codes. Lines filed under D75 reach its named position by a different move order.

Score sheet
#WhiteBlack
1d4Nf6
2c4g6
3Nf3Bg7
4g3O-O
5Bg2d5
6cxd5Nxd5
7O-O

The move that completes D74

The reference line of D76 plays all of these moves and continues beyond them; D74 is the position reached at 7.O-O.

  1. 7.O-O White castles kingside, opening a line for the queen on d1, guarding the bishop on g2.

The road to D74

One of the six named positions on the way are reached by a move order other than their own.

  1. 1.d4 … 2...g6four earlier stops: A40, A45, A50, E60
  2. 3.Nf3E60 King’s Knight Variation by another order
  3. 4.g3E60 Fianchetto Variation
  4. 7.O-OD74

The position after 7.O-O

White has brought out the knight on f3 and bishop on g2; Black the knight on d5 and bishop on g7. White has a half-open c-file; Black a half-open d-file. Black could capture with Bxd4.

WhiteBlackMaterial (pawn units)3838Minor pieces developed22Moves spent on pawns42Pawns on d4, e4, d5, e510Squares attacked in the other half47castled kingside, move 7castled kingside, move 4

Codes that branch off from D74

The reference lines of one other code leave D74 from the position after 7.O-O, each with its own moves.

CodeMovesReference line
D767...Nb6Neo-Grünfeld Defense: Delayed Exchange Variation

Closest boards in other codes

CodeLineDiffers on
D77Neo-Grünfeld Defense: Classical Variationthree squares: c4, d5, f6
D79Neo-Grünfeld Defense: Ultra-Delayed Exchange Variationthree squares: d5, f6, c7
D75Neo-Grünfeld Defense: Delayed Exchange Variationfour squares: b1, c3, c5, c7
D78Neo-Grünfeld Defense: Classical Variation, Original Defensefive squares: c4, d5, c6, f6, c7
E65King’s Indian Defense: Fianchetto Variation, Yugoslav Variationeight squares: b1, c3, c4, c5, d5, d6, f6, c7
D71Neo-Grünfeld Defense: Exchange Variationnine squares: e1, f1, g1, h1, f3, e8, f8, g8 …
E07Catalan Opening: Closednine squares: c4, d5, e6, f6, g6, d7, e7, g7 …

Where lines continue from here

Besides the codes above, they belong to D75.

Volume D

  1. 00
  2. 01
  3. 02
  4. 03
  5. 04
  6. 05
  7. 06
  8. 07
  9. 08
  10. 09
  11. 10
  12. 11
  13. 12
  14. 13
  15. 14
  16. 15
  17. 16
  18. 17
  19. 18
  20. 19
  21. 20
  22. 21
  23. 22
  24. 23
  25. 24
  26. 25
  27. 26
  28. 27
  29. 28
  30. 29
  31. 30
  32. 31
  33. 32
  34. 33
  35. 34
  36. 35
  37. 36
  38. 37
  39. 38
  40. 39
  41. 40
  42. 41
  43. 42
  44. 43
  45. 44
  46. 45
  47. 46
  48. 47
  49. 48
  50. 49
  51. 50
  52. 51
  53. 52
  54. 53
  55. 54
  56. 55
  57. 56
  58. 57
  59. 58
  60. 59
  61. 60
  62. 61
  63. 62
  64. 63
  65. 64
  66. 65
  67. 66
  68. 67
  69. 68
  70. 69
  71. 70
  72. 71
  73. 72
  74. 73
  75. 74
  76. 75
  77. 76
  78. 77
  79. 78
  80. 79
  81. 80
  82. 81
  83. 82
  84. 83
  85. 84
  86. 85
  87. 86
  88. 87
  89. 88
  90. 89
  91. 90
  92. 91
  93. 92
  94. 93
  95. 94
  96. 95
  97. 96
  98. 97
  99. 98
  100. 99

Other move orders

  • Neo-Grünfeld Defense: Delayed Exchange Variation is also reached inside D75 Neo-Grünfeld Defense: Delayed Exchange Variation, whose order is 1.d4 Nf6 2.Nf3 g6 3.c4 Bg7 4.g3 O-O 5.Bg2 d5 6.cxd5 Nxd5 7.O-O.

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