ecocodes
Volume D · Closed and semi-closed games‹ D96D98 ›
a1b2c3d4e5f6g7h8
Reference position · Black to move

D97 Grünfeld Defense: Russian Variation

D97 holds six named lines, all under the name Grünfeld Defense. It leaves D96, a position of the same name, with 5...dxc4 6.Qxc4 O-O 7.e4. With six named lines it is the third-largest code of the 20 Grünfeld Defense codes. That final move, by the e-pawn, covers d5 and f5 and opens a line for the bishop on f1 and the queen on c4.

Score sheet
#WhiteBlack
1d4Nf6
2c4g6
3Nc3d5
4Nf3Bg7
5Qb3dxc4
6Qxc4O-O
7e4

Lines filed under D97

All six share their first 13 plies, the whole reference line and then split five ways at Black’s move 7.

NameAfter the shared startPliesAt the end
Grünfeld Defense: Russian Variation(the shared start itself)13Black castled
Grünfeld Defense: Russian Variation, Byrne Variation7...Nc614Black castled
Grünfeld Defense: Russian Variation, Hungarian Variation7...a614Black castled
Grünfeld Defense: Russian Variation, Levenfish Variation7...b614Black castled
Grünfeld Defense: Russian Variation, Prins Variation7...Na614Black castled
Grünfeld Defense: Russian Variation, Szabo Variation7...c614Black castled

The road to D97

  1. 1.d4 … 4.Nf3seven earlier stops: A40, A45, A50, D80, D90, E60, E61
  2. 4...Bg7D90 Three Knights Variation
  3. 5.Qb3D96 Russian Variation
  4. 7.e4D97

The position after 7.e4

White has brought out the knight on c3 and knight on f3; Black the knight on f6 and bishop on g7. White has a half-open c-file; Black a half-open d-file. Black could capture with Nxe4, Qxd4. Black is to move and has 34 legal moves.

WhiteBlackMaterial (pawn units)3838Minor pieces developed22Moves spent on pawns33Pawns on d4, e4, d5, e520Squares attacked in the other half124not castledcastled kingside, move 6

Codes that branch off from D97

The reference lines of one other code leave D97 from the position after 7.e4, each with its own moves.

CodeMovesReference line
D987...Bg4Grünfeld Defense: Russian Variation, Smyslov Variation

Closest boards in other codes

CodeLineDiffers on
D95Grünfeld Defense: Three Knights Variation, Vienna Variationfive squares: b3, e3, c4, e4, d5
E91King’s Indian Defense: Orthodox Variationfive squares: d1, f1, e2, c4, d6
E81King’s Indian Defense: Sämisch Variation, Normal Defensesix squares: d1, g1, f2, f3, c4, d6
D93Grünfeld Defense: Three Knights Variation, Hungarian Variationseven squares: c1, d1, e3, c4, e4, f4, d5
E90King’s Indian Defense: Normal Variation, Rare Defensesseven squares: d1, c4, d6, e8, f8, g8, h8
E92King’s Indian Defense: Orthodox Variationseven squares: d1, f1, e2, c4, e5, d6, e7
D99Grünfeld Defense: Russian Variation, Smyslov Variationeight squares: c1, b3, e3, c4, g4, f6, d7, c8

Where lines continue from here

Four named lines filed under other codes pass through the position after 7.e4. Besides the codes above, they belong to D99.

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

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