ecocodes
Volume B · Semi-open games‹ B24B26 ›
a1b2c3d4e5f6g7h8
Reference position · White to move

B25 Sicilian Defense: Closed

B25 holds five named lines, all under the name Sicilian Defense. It leaves B24, a position of the same name, with 5.d3 d6. None of its five lines contains a capture. That final move, by the d-pawn, covers c5 and e5 and opens a line for the bishop on c8 and the queen on d8.

Score sheet
#WhiteBlack
1e4c5
2Nc3Nc6
3g3g6
4Bg2Bg7
5d3d6

Lines filed under B25

All five share their first ten plies, the whole reference line and then split two ways at White’s move 6.

NameAfter the shared startPlies
Sicilian Defense: Closed(the shared start itself)10
Sicilian Defense: Closed6.f411
Sicilian Defense: Closed, Botvinnik Defense, with Nge26.Nge2 e512
Sicilian Defense: Closed, Botvinnik Defense, with f46.f4 e512
Sicilian Defense: Closed, Botvinnik Defense, Edge Variation6.f4 e5 7.Nh3 Nge714

The road to B25

  1. 1.e4 … 3.g3five earlier stops: B00, B20, B23, B24
  2. 3...g6B24 Closed
  3. 4...Bg7B24 Closed
  4. 5...d6B25

The position after 5...d6

White has brought out the knight on c3 and bishop on g2; Black the knight on c6 and bishop on g7. White is to move and has 36 legal moves.

WhiteBlackMaterial (pawn units)3939Minor pieces developed22Moves spent on pawns33Pawns on d4, e4, d5, e510Squares attacked in the other half65not castlednot castled

Codes that branch off from B25

The reference lines of one other code leave B25 from the position after 5...d6, each with its own moves.

CodeMovesReference line
B266.Be3Sicilian Defense: Closed

Closest boards in other codes

CodeLineDiffers on
A26English Opening: King’s English Variation, Closed System, Full Symmetryeight squares: c2, e2, c4, e4, c5, e5, c7, e7
A37English Opening: Symmetrical Variation, Three Knights, Fianchetto Variationten squares: g1, c2, d2, e2, d3, f3, c4, e4 …
A42Modern Defense: Averbakh System11 squares: f1, c2, g2, d3, g3, c4, d4, c5 …
A38English Opening: Symmetrical Variation, Full Symmetry Line12 squares: g1, c2, d2, e2, d3, f3, c4, e4 …
B23Sicilian Defense: Closed12 squares: f1, d2, g2, d3, g3, c6, d6, g6 …
B56Sicilian Defense: Classical Variation12 squares: f1, g1, g2, d3, g3, d4, c5, f6 …
B57Sicilian Defense: Classical Variation, Sozin Attack12 squares: g1, g2, d3, g3, c4, d4, c5, f6 …

Where lines continue from here

One named line filed under other codes passes through the position after 5...d6. It belongs to the code listed above.

Volume B

  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 Sicilian Defense codes