ecocodes
Volume B · Semi-open games‹ B32B34 ›
a1b2c3d4e5f6g7h8
Reference position · White to move

B33 Sicilian Defense: Open

B33 holds 11 named lines, all under the name Sicilian Defense. It leaves B32, a position of the same name, with 4...Nf6. Material is no longer level at the end of two of its lines; the widest gap, three pawns in White’s favour, comes in Sicilian Defense: Lasker-Pelikan Variation, Exchange Variation. That final move, by the knight, opens a line for the rook on h8.

Score sheet
#WhiteBlack
1e4c5
2Nf3Nc6
3d4cxd4
4Nxd4Nf6

Lines filed under B33

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

NameAfter the shared startPliesAt the end
Sicilian Defense: Open(the shared start itself)8
Sicilian Defense: Lasker-Pelikan Variation5.Nc3 e510
Sicilian Defense: Lasker-Pelikan Variation, Exchange Variation5.Nc3 e5 6.Nxc611White +3
Sicilian Defense: Lasker-Pelikan Variation, Retreat Variation5.Nc3 e5 6.Nf311
Sicilian Defense: Lasker-Pelikan Variation, Schlechter Variation5.Nc3 e5 6.Nb311
Sicilian Defense: Lasker-Pelikan Variation, Bird Variation5.Nc3 e5 6.Ndb5 d6 7.Bg5 a6 8.Na3 Be616
Sicilian Defense: Lasker-Pelikan Variation, Sveshnikov Variation5.Nc3 e5 6.Ndb5 d6 7.Bg5 a6 8.Na3 b516
Sicilian Defense: Lasker-Pelikan Variation, Sveshnikov Variation, Chelyabinsk Variation5.Nc3 e5 6.Ndb5 d6 7.Bg5 a6 8.Na3 b5 9.Nd517
Sicilian Defense: Lasker-Pelikan Variation, Sveshnikov Variation5.Nc3 e5 6.Ndb5 d6 7.Bg5 a6 8.Na3 b5 9.Bxf6 gxf6 10.Nd5 f520
Sicilian Defense: Lasker-Pelikan Variation, Sveshnikov Variation, Novosibirsk Variation5.Nc3 e5 6.Ndb5 d6 7.Bg5 a6 8.Na3 b5 9.Bxf6 gxf6 10.Nd5 Bg720
Sicilian Defense: Lasker-Pelikan Variation, Sveshnikov Variation, Peresypkin’s Sacrifice5.Nc3 e5 6.Ndb5 d6 7.Bg5 a6 8.Na3 b5 9.Bxf6 gxf6 10.Nd5 f5 11.Bxb521White +1

The road to B33

  1. 1.e4 … 3.d4five earlier stops: B00, B20, B27, B30, B32
  2. 3...cxd4B32 Open
  3. 4.Nxd4B32 Open
  4. 4...Nf6B33

The position after 4...Nf6

White has brought out the knight on d4; Black the knight on c6 and knight on f6. White has a half-open d-file; Black a half-open c-file. White could capture with Nxc6. White is to move and has 42 legal moves.

WhiteBlackMaterial (pawn units)3838Minor pieces developed12Moves spent on pawns22Pawns on d4, e4, d5, e510Squares attacked in the other half94not castlednot castled

Closest boards in other codes

CodeLineDiffers on
B44Sicilian Defense: Taimanov Variationfour squares: e6, f6, e7, g8
B56Sicilian Defense: Classical Variationfour squares: b1, c3, d6, d7
C45Scotch Gamefour squares: f6, c7, e7, g8
B02Alekhine Defensesix squares: g1, d2, d4, c6, c7, b8
B12Caro-Kann Defensesix squares: g1, d4, c6, f6, b8, g8
B29Sicilian Defense: Nimzowitsch Variationsix squares: d2, f3, d4, c5, c6, b8
B30Sicilian Defense: Old Siciliansix squares: d2, f3, d4, c5, f6, g8

Where lines continue from here

Eighteen named lines filed under other codes pass through the position after 4...Nf6. They belong to B56, B57, B58, B59, B60, B61, B62, B64, B67, B68, B69, B72, 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
  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