ecocodes
Volume D · Closed and semi-closed games‹ D40D42 ›
a1b2c3d4e5f6g7h8
Reference position · Black to move

D41 Queen’s Gambit Declined: Semi-Tarrasch Defense

D41 holds ten named lines, all under the name Queen’s Gambit. It leaves D40, a position of the same name, with 5.cxd5. When the reference line ends, White is one pawn up on material. Lines filed under D34 reach one of its named positions by a different move order.

Score sheet
#WhiteBlack
1d4Nf6
2c4e6
3Nf3d5
4Nc3c5
5cxd5

The move that completes D41

The reference line of D42 plays all of these moves and continues beyond them; D41 is the position reached at 5.cxd5.

  1. 5.cxd5 The c-pawn takes the pawn on d5, covering c6 and e6.

Lines filed under D41

They begin with two different first moves.

NameAfter the shared startPliesAt the end
Queen’s Gambit Declined: Semi-Tarrasch Defense1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 c5 5.cxd59White +1
Queen’s Gambit Declined: Semi-Tarrasch Defense1.c4 c5 2.Nf3 Nf6 3.Nc3 Nc6 4.g3 d5 5.d4 e610
Queen’s Gambit Declined: Semi-Tarrasch Defense1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 c5 5.cxd5 Nxd5 6.g311
Queen’s Gambit Declined: Semi-Tarrasch Defense, Exchange Variation1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 c5 5.cxd5 Nxd5 6.e411
Queen’s Gambit Declined: Semi-Tarrasch Defense, Pillsbury Variation1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 c5 5.cxd5 Nxd5 6.e311
Queen’s Gambit Declined: Semi-Tarrasch Defense1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 c5 5.cxd5 Nxd5 6.g3 Nc6 7.Bg213
Queen’s Gambit Declined: Semi-Tarrasch Defense, Exchange Variation1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 c5 5.cxd5 Nxd5 6.e4 Nxc3 7.bxc313
Queen’s Gambit Declined: Semi-Tarrasch Defense, Endgame Variation1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 c5 5.cxd5 cxd4 6.Qxd4 exd5 7.e4 dxe4 8.Qxd8+15White +8, check
Queen’s Gambit Declined: Semi-Tarrasch Defense, San Sebastian Variation1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 c5 7.Nf3 cxd4 8.cxd4 Bb4+ 9.Bd2 Qa518
Queen’s Gambit Declined: Semi-Tarrasch Defense, Kmoch Variation1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c5 5.cxd5 Nxd5 6.e4 Nxc3 7.bxc3 cxd4 8.cxd4 Bb4+ 9.Bd2 Bxd2+ 10.Qxd2 O-O 11.Bb521Black castled

The road to D41

  1. 1.d4 … 3...d5four earlier stops: A40, A45, A50, E10
  2. 4.Nc3D37 Three Knights Variation
  3. 4...c5D40 Semi-Tarrasch Defense
  4. 5.cxd5D41

The position after 5.cxd5

White has brought out the knight on c3 and knight on f3; Black the knight on f6. White has a half-open c-file; Black a half-open d-file. Black could capture with Nxd5, Qxd5, cxd4, exd5. Black is to move and has 34 legal moves.

WhiteBlackMaterial (pawn units)3938Minor pieces developed21Moves spent on pawns33Pawns on d4, e4, d5, e520Squares attacked in the other half84Doubled pawns10not castlednot castled

Codes that branch off from D41

The reference lines of one other code leave D41 from the position after 6.e3, each with its own moves.

CodeMovesReference line
D426...Nc6 7.Bd3Queen’s Gambit Declined: Semi-Tarrasch Defense, Main Line

Closest boards in other codes

CodeLineDiffers on
D37Queen’s Gambit Declined: Three Knights Variationfour squares: c4, c5, d5, c7
D43Semi-Slav Defensefour squares: c4, c5, d5, c6
A61Benoni Defensefive squares: d4, d6, e6, g6, g7
B14Caro-Kann Defense: Panov Attacksix squares: g1, e2, f3, c4, c5, d5
D13Slav Defense: Exchange Variationsix squares: b1, c3, c5, d5, e6, e7
D15Slav Defense: Three Knights Variationsix squares: c4, c5, d5, c6, e6, e7
D24Queen’s Gambit Accepted: Showalter Variationsix squares: c4, c5, d5, e6, c7, e7

Where lines continue from here

Two named lines filed under other codes pass through the position after 5.cxd5. Besides the codes above, they belong to D34.

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: Semi-Tarrasch Defense is also reached inside D34 Tarrasch Defense: Classical Variation, Bogoljubow Variation, whose order is 1.d4 Nf6 2.c4 e6 3.Nc3 c5 4.Nf3 d5 5.cxd5.

Open this line in the finderAll Queen’s Gambit codes