ecocodes
Volume E · Indian defenses‹ E47E49 ›
a1b2c3d4e5f6g7h8
Reference position · White to move

E48 Nimzo-Indian Defense: Normal Variation, Classical Defense

E48 holds two named lines, all under the name Nimzo-Indian Defense. It leaves E47 (Nimzo-Indian Defense: Normal Variation) with 5...d5. Lines of ten other codes continue from its position, the fifth-widest spread of the 40 Nimzo-Indian Defense codes. That final move, by the d-pawn, covers c4 and e4 and opens a line for the bishop on c8 and the queen on d8.

Score sheet
#WhiteBlack
1d4Nf6
2c4e6
3Nc3Bb4
4e3O-O
5Bd3d5

Lines filed under E48

Both share their first ten plies, the whole reference line.

NameAfter the shared startPliesAt the end
Nimzo-Indian Defense: Normal Variation, Classical Defense(the shared start itself)10Black castled
Nimzo-Indian Defense: Ragozin Defense6.Nf3 Nc6 7.O-O13both castled

Nimzo-Indian Defense: Ragozin Defense

  1. 6.Nf3 The knight leaves g1 for f3, opening a line for the rook on h1.
  2. 6...Nc6 The knight leaves b8 for c6, opening a line for the rook on a8, guarding the bishop on b4.
  3. 7.O-O White castles kingside, opening a line for the queen on d1, guarding the pawn on g2.

The road to E48

  1. 1.d4 … 4.e3five earlier stops: A40, A45, A50, E20, E40
  2. 4...O-OE46 Normal Variation
  3. 5.Bd3E47 Normal Variation
  4. 5...d5E48

The position after 5...d5

White has brought out the knight on c3 and bishop on d3; Black the knight on f6 and bishop on b4. White could capture with Bxh7+, cxd5. White is to move and has 36 legal moves.

WhiteBlackMaterial (pawn units)3939Minor pieces developed22Moves spent on pawns32Pawns on d4, e4, d5, e511Squares attacked in the other half85not castledcastled kingside, move 4

Codes that branch off from E48

The reference lines of three other codes leave E48 from the position after 5...d5, each with its own moves.

CodeMovesReference line
E496.a3 Bxc3+ 7.bxc3Nimzo-Indian Defense: Normal Variation, Botvinnik System
E526.Nf3 b6Nimzo-Indian Defense: Normal Variation, Schlechter Defense
E536.Nf3 c5Nimzo-Indian Defense: Normal Variation, Gligoric System

Closest boards in other codes

CodeLineDiffers on
E46Nimzo-Indian Defense: Normal Variationfour squares: f1, d3, d5, d7
E51Nimzo-Indian Defense: Normal Variation, Ragozin Variationfour squares: f1, g1, d3, f3
E50Nimzo-Indian Defensesix squares: f1, g1, d3, f3, d5, d7
D54Queen’s Gambit Declined: Neo-Orthodox Variationseven squares: a1, c1, f1, d3, b4, g5, e7
D55Queen’s Gambit Declined: Modern Variation, Normal Lineeight squares: c1, f1, g1, d3, f3, b4, g5, e7
E40Nimzo-Indian Defense: Rubinstein Systemeight squares: f1, d3, d5, d7, e8, f8, g8, h8
B14Caro-Kann Defense: Panov Attacknine squares: f1, d3, e3, b4, c7, e8, f8, g8 …

Where lines continue from here

Besides the codes above, they belong to E51, E54, E55, E56, E57, E58, E59.

Volume E

  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

Open this line in the finderAll Nimzo-Indian Defense codes