ecocodes
Volume D · Closed and semi-closed games‹ D25D27 ›
a1b2c3d4e5f6g7h8
Reference position · White to move

D26 Queen’s Gambit Accepted: Normal Variation, Traditional System

D26 holds 11 named lines, all under the name Queen’s Gambit. It leaves D25 (Queen’s Gambit Accepted: Normal Variation) with 4...e6. When the reference line ends, Black is one pawn up on material. White’s pieces and pawns attack three squares in Black’s half, level for the fewest of the 44 Queen’s Gambit codes. Lines filed under D27 reach one of its named positions by a different move order.

Score sheet
#WhiteBlack
1d4d5
2c4dxc4
3Nf3Nf6
4e3e6

The move that completes D26

The reference line of D27 plays all of these moves and continues beyond them; D26 is the position reached at 4...e6.

  1. 4...e6 The e-pawn advances to e6, covering d5 and f5, opening a line for the queen on d8 and the bishop on f8.

Lines filed under D26

All 11 share their first eight plies, the whole reference line.

NameAfter the shared startPliesAt the end
Queen’s Gambit Accepted: Normal Variation, Traditional System(the shared start itself)8Black +1
Queen’s Gambit Accepted: Classical Defense5.Bxc4 c510
Queen’s Gambit Accepted: Classical Defense, Normal Line5.Bxc4 c5 6.O-O11White castled
Queen’s Gambit Accepted: Classical Defense, Steinitz Variation, Development Variation5.Bxc4 c5 6.O-O Nc612White castled
Queen’s Gambit Accepted: Classical Defense, Steinitz Variation, Exchange Variation5.Bxc4 c5 6.O-O cxd412Black +1, White castled
Queen’s Gambit Accepted: Normal Variation, .. a6 Sideline5.Bxc4 a6 6.Nc3 b512
Queen’s Gambit Accepted: Normal Variation, Traditional System5.Bxc4 Be7 6.O-O a612White castled
Queen’s Gambit Accepted: Normal Variation, Traditional System5.Bxc4 Be7 6.O-O O-O12both castled
Queen’s Gambit Accepted: Normal Variation, Traditional System5.Bxc4 Be7 6.O-O O-O 7.Nc313both castled
Queen’s Gambit Accepted: Normal Variation, .. a6 Sideline5.Bxc4 a6 6.Nc3 b5 7.Bb3 Bb7 8.O-O15White castled
Queen’s Gambit Accepted: Classical, Furman Variation5.Bxc4 c5 6.Qe2 a6 7.dxc5 Bxc5 8.O-O Nc6 9.e4 b5 10.e519White castled

The road to D26

  1. 1.d4 … 3.Nf3five earlier stops: A40, D00, D06, D20, D21
  2. 3...Nf6D23 Queen’s Gambit Accepted
  3. 4.e3D25 Normal Variation
  4. 4...e6D26

The position after 4...e6

White has brought out the knight on f3; Black the knight on f6. White has a half-open c-file; Black a half-open d-file. White could capture with Bxc4. Undefended and attacked: the pawn on c4. White is to move and has 31 legal moves.

WhiteBlackMaterial (pawn units)3839Minor pieces developed11Moves spent on pawns33Pawns on d4, e4, d5, e510Squares attacked in the other half37Doubled pawns01not castlednot castled

Codes that branch off from D26

The reference lines of one other code leave D26 from the position after 6.O-O, each with its own moves.

CodeMovesReference line
D276...a6Queen’s Gambit Accepted: Classical Defense, Main Line

Closest boards in other codes

CodeLineDiffers on
D05Queen’s Pawn Game: Colle Systemthree squares: c2, c4, d5
D23Queen’s Gambit Acceptedfour squares: e2, e3, e6, e7
E10Indian Defense: Anti-Nimzo-Indianfour squares: e2, e3, c4, d7
E14Queen’s Indian Defense: Spassky Systemfour squares: c4, b6, b7, d7
D04Queen’s Pawn Game: Colle Systemfive squares: c2, c4, d5, e6, e7
E04Catalan Opening: Open Defensefive squares: f1, e2, g2, e3, g3
D21Queen’s Gambit Accepted: Normal Variationsix squares: e2, e3, e6, f6, e7, g8

Where lines continue from here

Twelve named lines filed under other codes pass through the position after 4...e6. Besides the codes above, they belong to D28, D29.

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 Accepted: Classical Defense is also reached inside D27 Queen’s Gambit Accepted: Classical Defense, Russian Gambit, whose order is 1.d4 d5 2.c4 dxc4 3.e3 Nf6 4.Bxc4 e6 5.Nf3 c5.
  • Queen’s Gambit Accepted: Classical Defense, Normal Line is also reached inside D27 Queen’s Gambit Accepted: Classical Defense, Russian Gambit, whose order is 1.d4 d5 2.c4 dxc4 3.e3 Nf6 4.Bxc4 e6 5.Nf3 c5 6.O-O.
  • Queen’s Gambit Accepted: Normal Variation, Traditional System is also reached inside D27 Queen’s Gambit Accepted: Classical Defense, Rubinstein Variation, whose order is 1.d4 d5 2.c4 dxc4 3.Nf3 e6 4.e3 Nf6.
  • Queen’s Gambit Accepted: Normal Variation, Traditional System is also reached inside D27 Queen’s Gambit Accepted: Classical Defense, Rubinstein Variation, whose order is 1.d4 d5 2.c4 dxc4 3.Nf3 e6 4.e3 Nf6 5.Bxc4 Be7 6.O-O O-O.
  • Queen’s Gambit Accepted: Normal Variation, Traditional System is also reached inside D27 Queen’s Gambit Accepted: Classical Defense, Rubinstein Variation, whose order is 1.d4 d5 2.c4 dxc4 3.Nf3 e6 4.e3 Nf6 5.Bxc4 Be7 6.O-O O-O 7.Nc3.

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