ecocodes
Volume D · Closed and semi-closed games‹ D77D79 ›
a1b2c3d4e5f6g7h8
Reference position · White to move

D78 Neo-Grünfeld Defense: Classical Variation, Original Defense

D78 holds a single named line. It leaves E60 (King’s Indian Defense: Fianchetto Variation) with 4...O-O 5.Bg2 c6 6.O-O d5. At 12 plies, its reference line is the fifth-shortest of the 10 Neo-Grünfeld Defense codes. Lines filed under D79 reach its named position by a different move order. White, to move in that position, has 34 legal moves, the fourth-highest count of the 10 Neo-Grünfeld Defense codes.

Score sheet
#WhiteBlack
1d4Nf6
2c4g6
3Nf3Bg7
4g3O-O
5Bg2c6
6O-Od5

The move that completes D78

The reference line of D79 plays all of these moves and continues beyond them; D78 is the position reached at 6...d5.

  1. 6...d5 The d-pawn advances two squares to d5, covering c4 and e4, opening a line for the bishop on c8 and the queen on d8.

The road to D78

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. 6...d5D78

The position after 6...d5

White has brought out the knight on f3 and bishop on g2; Black the knight on f6 and bishop on g7. White could capture with cxd5.

WhiteBlackMaterial (pawn units)3939Minor pieces developed22Moves spent on pawns33Pawns on d4, e4, d5, e511Squares attacked in the other half64castled kingside, move 6castled kingside, move 4

Codes that branch off from D78

The reference lines of one other code leave D78 from the position after 6...d5, each with its own moves.

CodeMovesReference line
D797.cxd5 cxd5Neo-Grünfeld Defense: Ultra-Delayed Exchange Variation

Closest boards in other codes

CodeLineDiffers on
D77Neo-Grünfeld Defense: Classical Variationtwo squares: c6, c7
D74Neo-Grünfeld Defense: Delayed Exchange Variationfive squares: c4, d5, c6, f6, c7
A88Dutch Defense: Leningrad Variation, Warsaw Variationsix squares: b1, c3, d5, f5, d6, f7
D76Neo-Grünfeld Defense: Delayed Exchange Variationsix squares: c4, d5, b6, c6, f6, c7
E65King’s Indian Defense: Fianchetto Variation, Yugoslav Variationsix squares: b1, c3, c5, d5, c6, d6
A39English Opening: Symmetrical Variation, Mecking Variationseven squares: b1, c3, c5, d5, c6, d7, b8
D75Neo-Grünfeld Defense: Delayed Exchange Variationseven squares: b1, c3, c4, c5, d5, c6, f6

Where lines continue from here

Ten named lines filed under other codes pass through the position after 6...d5. All of them belong to the codes listed above.

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: Classical Variation, Original Defense is also reached inside D79 Neo-Grünfeld Defense: Ultra-Delayed Exchange Variation, whose order is 1.d4 Nf6 2.c4 g6 3.g3 d5 4.Bg2 Bg7 5.Nf3 O-O 6.O-O c6.

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