ecocodes
Volume B · Semi-open games‹ B29B31 ›
a1b2c3d4e5f6g7h8
Reference position · White to move

B30 Sicilian Defense: Old Sicilian

B30 holds nine named lines, all under the name Sicilian Defense. It leaves B27 (Sicilian Defense) with 2...Nc6. Lines of 25 other codes continue from its position, the fourth-widest spread of the 80 Sicilian Defense codes. None of its nine lines contains a capture.

Score sheet
#WhiteBlack
1e4c5
2Nf3Nc6

The move that completes B30

The reference line of B31 plays all of these moves and continues beyond them; B30 is the position reached at 2...Nc6.

  1. 2...Nc6 The knight leaves b8 for c6, opening a line for the rook on a8.

Lines filed under B30

All nine share their first four plies, the whole reference line and then split three ways at White’s move 3.

NameAfter the shared startPlies
Sicilian Defense: Old Sicilian(the shared start itself)4
Sicilian Defense: Nyezhmetdinov-Rossolimo Attack3.Bb55
Sicilian Defense: Portsmouth Gambit3.b45
Sicilian Defense: Closed, Anti-Sveshnikov Variation3.Nc3 e56
Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Brooklyn Retreat Defense3.Bb5 Nb86
Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, San Francisco Gambit3.Bb5 Na5 4.b47
Sicilian Defense: Closed, Anti-Sveshnikov Variation, with Nf63.Nc3 e5 4.Bc4 Be7 5.d3 Nf610
Sicilian Defense: Closed, Anti-Sveshnikov Variation, with d63.Nc3 e5 4.Bc4 Be7 5.d3 d610
Sicilian Defense: Closed, Anti-Sveshnikov Variation, Kharlov-Kramnik Line3.Nc3 e5 4.Bc4 Be7 5.d3 d6 6.Nd2 Bg512

The road to B30

  1. 1.e4one earlier stop: B00
  2. 1...c5B20 Sicilian Defense
  3. 2.Nf3B27 Sicilian Defense
  4. 2...Nc6B30

The position after 2...Nc6

White has brought out the knight on f3; Black the knight on c6. White is to move and has 28 legal moves.

WhiteBlackMaterial (pawn units)3939Minor pieces developed11Moves spent on pawns11Pawns on d4, e4, d5, e510Squares attacked in the other half62not castlednot castled

Codes that branch off from B30

The reference lines of two other codes leave B30 from two of its named positions; “From” gives the last part of that position’s name.

CodeFromMovesReference line
B31Nyezhmetdinov-Rossolimo Attack3...g6Sicilian Defense: Nyezhmetdinov-Rossolimo Attack, Fianchetto Variation
B32Old Sicilian3.d4Sicilian Defense: Open

Closest boards in other codes

CodeLineDiffers on
B20Sicilian Defensefour squares: g1, f3, c6, b8
B28Sicilian Defense: O’Kelly Variationfour squares: a6, c6, a7, b8
B29Sicilian Defense: Nimzowitsch Variationfour squares: c6, f6, b8, g8
B40Sicilian Defense: French Variationfour squares: c6, e6, e7, b8
B50Sicilian Defense: Modern Variationsfour squares: c6, d6, d7, b8
C44King’s Knight Opening: Normal Variationfour squares: c5, e5, c7, e7
B10Caro-Kann Defensefive squares: g1, f3, c5, c6, b8

Where lines continue from here

Besides the codes above, they belong to B33, B34, B35, B36, B37, B38, B39, B56, B57, B58, B59, B60, B61, B62, B64, B67, B68, B69, B72, B73, B74, B88, B89.

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
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  60. 59
  61. 60
  62. 61
  63. 62
  64. 63
  65. 64
  66. 65
  67. 66
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  69. 68
  70. 69
  71. 70
  72. 71
  73. 72
  74. 73
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  83. 82
  84. 83
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  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