ecocodes
Volume D · Closed and semi-closed games‹ D54D56 ›
a1b2c3d4e5f6g7h8
Reference position · Black to move

D55 Queen’s Gambit Declined: Modern Variation, Normal Line

D55 holds six named lines, all under the name Queen’s Gambit. It leaves D53 (Queen’s Gambit Declined) with 5...O-O 6.e3. Lines filed under D56, D57, D60, D63, D64 and D68 reach one of its named positions by a different move order. That final move, by the e-pawn, covers d4 and f4 and opens a line for the queen on d1 and the bishop on f1.

Score sheet
#WhiteBlack
1d4Nf6
2c4e6
3Nf3d5
4Nc3Be7
5Bg5O-O
6e3

Lines filed under D55

All six share the start 1.d4 Nf6 2.c4 e6 3.Nf3 and then split two ways at Black’s move 3.

NameAfter the shared startPliesAt the end
Queen’s Gambit Declined: Modern Variation, Normal Line3...d5 4.Nc3 Be7 5.Bg5 O-O 6.e311Black castled
Queen’s Gambit Declined: Neo-Orthodox Variation3...d5 4.Nc3 Be7 5.Bg5 O-O 6.e3 h612Black castled
Queen’s Gambit Declined: Anti-Tartakower Variation3...d5 4.Nc3 Be7 5.Bg5 O-O 6.e3 h6 7.Bxf613White +3, Black castled
Queen’s Gambit Declined: Neo-Orthodox Variation, Main Line3...d5 4.Nc3 Be7 5.Bg5 h6 6.Bh4 O-O 7.e313Black castled
Queen’s Gambit Declined: Pillsbury Attack3...b6 4.Nc3 d5 5.cxd5 exd5 6.Bg5 Be7 7.e3 O-O 8.Bd3 Bb7 9.Ne517Black castled
Queen’s Gambit Declined: Anti-Tartakower Variation, Petrosian Variation3...d5 4.Nc3 Be7 5.Bg5 h6 6.Bxf6 Bxf6 7.e3 O-O 8.Rc1 c6 9.Bd3 Nd7 10.O-O dxc4 11.Bxc421both castled

The road to D55

One of the six named positions on the way are reached by a move order other than their own.

  1. 1.d4 … 3...d5four earlier stops: A40, A45, A50, E10
  2. 4.Nc3D37 Three Knights Variation
  3. 5.Bg5D53 Queen’s Gambit Declined by another order
  4. 6.e3D55

The position after 6.e3

White has brought out the knight on c3, knight on f3 and bishop on g5; Black the knight on f6 and bishop on e7. Black could capture with dxc4. Black is to move and has 29 legal moves.

WhiteBlackMaterial (pawn units)3939Minor pieces developed32Moves spent on pawns32Pawns on d4, e4, d5, e511Squares attacked in the other half75not castledcastled kingside, move 5

Codes that branch off from D55

The reference lines of three other codes leave D55 from two of its named positions; “From” gives the last part of that position’s name.

CodeFromMovesReference line
D56Main Line7...Ne4Queen’s Gambit Declined: Lasker Defense
D58Main Line7...b6Queen’s Gambit Declined: Tartakower Defense
D60Normal Line6...Nbd7Queen’s Gambit Declined: Orthodox Defense

Closest boards in other codes

CodeLineDiffers on
D54Queen’s Gambit Declined: Neo-Orthodox Variationfour squares: a1, c1, g1, f3
D61Queen’s Gambit Declined: Orthodox Defense, Rubinstein Variationfour squares: d1, c2, d7, b8
D63Queen’s Gambit Declined: Orthodox Defense, Main Linefour squares: a1, c1, d7, b8
E51Nimzo-Indian Defense: Normal Variation, Ragozin Variationfour squares: c1, b4, g5, e7
D93Grünfeld Defense: Three Knights Variation, Hungarian Variationsix squares: f4, g5, e6, g6, e7, g7
E50Nimzo-Indian Defensesix squares: c1, b4, d5, g5, d7, e7
D62Queen’s Gambit Declined: Orthodox Defense, Rubinstein Variation, Flohr Lineeight squares: d1, c2, c4, c5, d5, c7, d7, b8

Where lines continue from here

Thirty-nine named lines filed under other codes pass through the position after 6.e3. Besides the codes above, they belong to D57, D61, D62, D63, D64, D65, D66, D67, D68, D69.

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

  • Queen’s Gambit Declined: Modern Variation, Normal Line is also reached inside D56 Queen’s Gambit Declined: Lasker Defense, Russian Variation, whose order is 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3.
  • Queen’s Gambit Declined: Modern Variation, Normal Line is also reached inside D60 Queen’s Gambit Declined: Orthodox Defense, Rauzer Variation, whose order is 1.d4 d5 2.Nf3 Nf6 3.c4 e6 4.Nc3 Be7 5.Bg5 O-O 6.e3.
  • Queen’s Gambit Declined: Modern Variation, Normal Line is also reached inside D63 Queen’s Gambit Declined: Orthodox Defense, Capablanca Variation, whose order is 1.Nf3 d5 2.d4 Nf6 3.c4 e6 4.Nc3 Be7 5.Bg5 O-O 6.e3.
  • Queen’s Gambit Declined: Modern Variation, Normal Line is also reached inside D64 Queen’s Gambit Declined: Orthodox Defense, Rubinstein Attack, whose order is 1.d4 Nf6 2.c4 e6 3.Nc3 d5 4.Nf3 Be7 5.Bg5 O-O 6.e3.
  • Queen’s Gambit Declined: Modern Variation, Normal Line is also reached inside D68 Queen’s Gambit Declined: Orthodox Defense, Classical Variation, whose order is 1.d4 d5 2.c4 e6 3.Nf3 Nf6 4.Nc3 Be7 5.Bg5 O-O 6.e3.
  • Queen’s Gambit Declined: Neo-Orthodox Variation is also reached inside D56 Queen’s Gambit Declined: Lasker Defense, Russian Variation, whose order is 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Be7 5.e3 O-O 6.Nf3 h6.
  • Queen’s Gambit Declined: Neo-Orthodox Variation, Main Line is also reached inside D56 Queen’s Gambit Declined: Lasker Defense, whose order is 1.d4 d5 2.c4 e6 3.Nc3 Be7 4.Nf3 Nf6 5.Bg5 h6 6.Bh4 O-O 7.e3.
  • Queen’s Gambit Declined: Neo-Orthodox Variation, Main Line is also reached inside D57 Queen’s Gambit Declined: Lasker Defense, Bernstein Variation, whose order is 1.d4 Nf6 2.c4 e6 3.Nc3 d5 4.Bg5 Be7 5.e3 h6 6.Bh4 O-O 7.Nf3.

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