ecocodes
Volume A · Flank openings‹ A89A91 ›
a1b2c3d4e5f6g7h8
Reference position · Black to move

A90 Dutch Defense: Classical Variation

A90 holds five named lines, all under the name Dutch Defense. It leaves A86 (Dutch Defense: Fianchetto Variation) with 3...e6 4.Bg2. Lines of nine other codes continue from its position, the fourth-widest spread of the 20 Dutch Defense codes. None of its five lines contains a capture.

Score sheet
#WhiteBlack
1d4f5
2c4Nf6
3g3e6
4Bg2

The move that completes A90

The reference line of A91 plays all of these moves and continues beyond them; A90 is the position reached at 4.Bg2.

  1. 4.Bg2 The bishop leaves f1 for g2, guarding the rook on h1.

Lines filed under A90

All five share the start 1.d4 f5 2.c4 and then split two ways at Black’s move 2.

NameAfter the shared startPliesAt the end
Dutch Defense: Classical Variation2...Nf6 3.g3 e6 4.Bg27
Dutch Defense: Nimzo-Dutch Variation2...Nf6 3.g3 e6 4.Bg2 Bb4+8check
Dutch Defense: Classical Variation2...Nf6 3.g3 e6 4.Bg2 d5 5.Nf39
Dutch Defense: Nimzo-Dutch Variation, Alekhine Variation2...Nf6 3.g3 e6 4.Bg2 Bb4+ 5.Bd2 Be710
Dutch Defense: Stonewall Variation, Modern Variation2...e6 3.Nf3 Nf6 4.g3 c6 5.Bg2 d5 6.O-O Bd612White castled

The road to A90

  1. 1.d4 … 2.c4three earlier stops: A40, A80, A84
  2. 2...Nf6A84 Normal Variation
  3. 3.g3A86 Fianchetto Variation
  4. 4.Bg2A90

The position after 4.Bg2

White has brought out the bishop on g2; Black the knight on f6. Black is to move and has 30 legal moves.

WhiteBlackMaterial (pawn units)3939Minor pieces developed11Moves spent on pawns32Pawns on d4, e4, d5, e510Squares attacked in the other half84not castlednot castled

Codes that branch off from A90

The reference lines of one other code leave A90 from the position after 4.Bg2, each with its own moves.

CodeMovesReference line
A914...Be7Dutch Defense: Classical Variation

Closest boards in other codes

CodeLineDiffers on
E00Catalan Openingfour squares: f1, g2, f5, f7
E01Catalan Opening: Open Defensefour squares: d5, f5, d7, f7
E02Catalan Opening: Open Defensefour squares: c4, f5, d7, f7
E03Catalan Opening: Open Defensesix squares: d1, c4, f5, d7, f7, b8
E04Catalan Opening: Open Defensesix squares: g1, f3, c4, f5, d7, f7
A50Indian Defense: Normal Variationseven squares: f1, g2, g3, f5, e6, e7, f7
A51Indian Defense: Budapest Gambitseven squares: f1, g2, g3, e5, f5, e6, f7

Where lines continue from here

Besides the codes above, they belong to A92, A93, A94, A95, A96, A97, A98, A99.

Volume A

  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 Dutch Defense codes