ecocodes
Volume D · Closed and semi-closed games‹ D46D48 ›
a1b2c3d4e5f6g7h8
Reference position · Black to move

D47 Semi-Slav Defense: Semi-Meran Variation

D47 holds six named lines, all under the name Semi-Slav Defense. It leaves D46 (Semi-Slav Defense: Main Line) with 6...dxc4 7.Bxc4. Black’s pieces and pawns attack four squares in White’s half, the fewest of the 7 Semi-Slav Defense codes. Its deepest line, Semi-Slav Defense: Meran Variation, Wade Variation, Kaidanov Gambit, runs to 13.Nxd4, the second-longest of the 7 Semi-Slav Defense codes. Two captures are made along the reference line, the second-highest count of the 7 Semi-Slav Defense codes.

Score sheet
#WhiteBlack
1d4d5
2c4c6
3Nc3Nf6
4e3e6
5Nf3Nbd7
6Bd3dxc4
7Bxc4

The move that completes D47

The reference line of D48 plays all of these moves and continues beyond them; D47 is the position reached at 7.Bxc4.

  1. 7.Bxc4 The bishop on d3 takes the pawn on c4, opening a line for the queen on d1.

Lines filed under D47

All six share the start 1.d4 d5 2.c4 c6 and then split two ways at White’s move 3.

NameAfter the shared startPliesAt the end
Semi-Slav Defense: Semi-Meran Variation3.Nc3 Nf6 4.e3 e6 5.Nf3 Nbd7 6.Bd3 dxc4 7.Bxc413
Semi-Slav Defense: Meran Variation3.Nc3 Nf6 4.e3 e6 5.Nf3 Nbd7 6.Bd3 dxc4 7.Bxc4 b514
Semi-Slav Defense: Meran Variation, Lundin Variation3.Nf3 Nf6 4.Nc3 e6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 b416
Semi-Slav Defense: Meran Variation, Wade Variation3.Nc3 Nf6 4.e3 e6 5.Nf3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 Bb716
Semi-Slav Defense: Meran Variation, Wade Variation, Larsen Variation3.Nc3 Nf6 4.e3 e6 5.Nf3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 Bb7 9.e4 b4 10.Na4 c5 11.e5 Nd522
Semi-Slav Defense: Meran Variation, Wade Variation, Kaidanov Gambit3.Nc3 Nf6 4.e3 e6 5.Nf3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5 8.Bd3 Bb7 9.e4 b4 10.Na4 c5 11.e5 Nd5 12.O-O cxd4 13.Nxd425White castled

The road to D47

  1. 1.d4 … 5.Nf3six earlier stops: A40, D00, D06, D10, D45
  2. 5...Nbd7D45 Normal Variation
  3. 6.Bd3D46 Main Line
  4. 7.Bxc4D47

The position after 7.Bxc4

White has brought out the knight on c3, knight on f3 and bishop on c4; Black the knight on d7 and knight on f6. White has a half-open c-file; Black a half-open d-file. Black is to move and has 31 legal moves.

WhiteBlackMaterial (pawn units)3838Minor pieces developed32Moves spent on pawns34Pawns on d4, e4, d5, e510Squares attacked in the other half74not castlednot castled

Codes that branch off from D47

The reference lines of one other code leave D47 from the position after 7...b5, each with its own moves.

CodeMovesReference line
D488.Bd3 a6Semi-Slav Defense: Meran Variation

Closest boards in other codes

CodeLineDiffers on
D45Semi-Slav Defense: Main Linefive squares: f1, c4, d5, d7, b8
D52Queen’s Gambit Declinedfive squares: c1, f1, c4, d5, g5
D42Queen’s Gambit Declined: Semi-Tarrasch Defense, Main Lineseven squares: d3, c4, c5, d5, c6, f6, d7
D43Semi-Slav Defenseseven squares: f1, e2, e3, c4, d5, d7, b8
A33English Opening: Symmetrical Variation, Anti-Benoni Variation, Spielmann Defenseeight squares: f1, e2, e3, f3, c4, d4, c6, d7
B88Sicilian Defense: Sozin Attack, Leonhardt Variationeight squares: c2, e3, f3, d4, e4, c6, d6, d7
D26Queen’s Gambit Accepted: Normal Variation, Traditional Systemeight squares: b1, f1, c3, c4, c6, c7, d7, b8

Where lines continue from here

Twelve named lines filed under other codes pass through the position after 7.Bxc4. Besides the codes above, they belong to D46, D49.

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

  • Semi-Slav Defense: Meran Variation is also reached inside D48 Semi-Slav Defense: Meran Variation, Pirc Variation, whose order is 1.d4 d5 2.c4 e6 3.Nc3 c6 4.e3 Nf6 5.Nf3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5.
  • Semi-Slav Defense: Meran Variation is also reached inside D49 Semi-Slav Defense: Meran Variation, Rellstab Attack, whose order is 1.d4 d5 2.c4 c6 3.Nc3 Nf6 4.Nf3 e6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4 b5.
  • Semi-Slav Defense: Semi-Meran Variation is also reached inside D48 Semi-Slav Defense: Meran Variation, Pirc Variation, whose order is 1.d4 d5 2.c4 e6 3.Nc3 c6 4.e3 Nf6 5.Nf3 Nbd7 6.Bd3 dxc4 7.Bxc4.
  • Semi-Slav Defense: Semi-Meran Variation is also reached inside D49 Semi-Slav Defense: Meran Variation, Rellstab Attack, whose order is 1.d4 d5 2.c4 c6 3.Nc3 Nf6 4.Nf3 e6 5.e3 Nbd7 6.Bd3 dxc4 7.Bxc4.

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