ecocodes
Volume D · Closed and semi-closed games‹ D76D78 ›
a1b2c3d4e5f6g7h8
Reference position · Black to move

D77 Neo-Grünfeld Defense: Classical Variation

D77 holds three named lines, all under the name Neo-Grünfeld Defense. It leaves A49 (Indian Defense: Przepiorka Variation) with 3...Bg7 4.Bg2 O-O 5.O-O d5 6.c4. Black, to move in that position, has 32 legal moves, the second-lowest count of the 10 Neo-Grünfeld Defense codes. With three named lines it is the second-largest code of the 10 Neo-Grünfeld Defense codes. At 11 plies, its reference line is the fourth-shortest of the 10 Neo-Grünfeld Defense codes.

Score sheet
#WhiteBlack
1d4Nf6
2Nf3g6
3g3Bg7
4Bg2O-O
5O-Od5
6c4

Moves only D77 plays

Same as A49 up to 3.g3, then:

  1. 3...Bg7 The bishop leaves f8 for g7, opening a line for the rook on h8, guarding the rook on h8.
  2. 4.Bg2 The bishop leaves f1 for g2, opening a line for the rook on h1, guarding the rook on h1.
  3. 4...O-O Black castles kingside, opening a line for the queen on d8, guarding the bishop on g7.
  4. 5.O-O White castles kingside, opening a line for the queen on d1, guarding the bishop on g2.
  5. 5...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.
  6. 6.c4 The c-pawn advances two squares to c4, covering b5 and d5, opening a line for the queen on d1.

Lines filed under D77

All three share their first 11 plies, the whole reference line and then split two ways at Black’s move 6.

NameAfter the shared startPliesAt the end
Neo-Grünfeld Defense: Classical Variation(the shared start itself)11both castled
Neo-Grünfeld Defense: Classical Variation, Modern Defense6...dxc412Black +1, both castled
Neo-Grünfeld Defense: Classical Variation, Polgar Variation6...Nc612both castled

Neo-Grünfeld Defense: Classical Variation, Modern Defense

  1. 6...dxc4 The d-pawn takes the pawn on c4, covering b3 and d3, opening a line for the queen on d8.

Neo-Grünfeld Defense: Classical Variation, Polgar Variation

  1. 6...Nc6 The knight leaves b8 for c6, opening a line for the rook on a8.

The road to D77

  1. 1.d4 … 2.Nf3three earlier stops: A40, A45, A46
  2. 2...g6A48 East Indian Defense
  3. 3.g3A49 Przepiorka Variation
  4. 6.c4D77

The position after 6.c4

White has brought out the knight on f3 and bishop on g2; Black the knight on f6 and bishop on g7. Black could capture with dxc4. Undefended and attacked: the pawn on c4.

WhiteBlackMaterial (pawn units)3939Minor pieces developed22Moves spent on pawns32Pawns on d4, e4, d5, e511Squares attacked in the other half64castled kingside, move 5castled kingside, move 4

Closest boards in other codes

CodeLineDiffers on
D78Neo-Grünfeld Defense: Classical Variation, Original Defensetwo squares: c6, c7
D79Neo-Grünfeld Defense: Ultra-Delayed Exchange Variationtwo squares: c4, c7
D74Neo-Grünfeld Defense: Delayed Exchange Variationthree squares: c4, d5, f6
D76Neo-Grünfeld Defense: Delayed Exchange Variationfour squares: c4, d5, b6, f6
E07Catalan Opening: Closedsix squares: e6, g6, d7, e7, g7, b8
E65King’s Indian Defense: Fianchetto Variation, Yugoslav Variationsix squares: b1, c3, c5, d5, d6, c7
D75Neo-Grünfeld Defense: Delayed Exchange Variationseven squares: b1, c3, c4, c5, d5, f6, c7

Where lines continue from here

Five named lines filed under other codes pass through the position after 6.c4. They belong to D79.

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 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.

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