ecocodes
Volume E · Indian defenses‹ E10E12 ›
a1b2c3d4e5f6g7h8
Reference position · White to move

E11 Bogo-Indian Defense

E11 holds 21 named lines, all under the name Bogo-Indian Defense. It leaves E10 (Indian Defense: Anti-Nimzo-Indian) with 3...Bb4+. White, to move in that position, has five legal moves, the second-lowest count of all 500 codes. The reference line ends with a check, 3...Bb4+. Only six of the 500 reference lines end this way. With 21 named lines it is the second-largest code of the 100 codes in volume E.

Score sheet
#WhiteBlack
1d4Nf6
2c4e6
3Nf3Bb4+

Moves only E11 plays

Same as A61 up to 3.Nf3, then:

  1. 3...Bb4+ The bishop leaves f8 for b4, opening a line for the rook on h8, giving check.

Lines filed under E11

All 21 share the start 1.d4 Nf6 2.c4 e6 and then split two ways at White’s move 3.

NameAfter the shared startPliesAt the end
Bogo-Indian Defense3.Nf3 Bb4+6check
Bogo-Indian Defense: Grünfeld Variation3.Nf3 Bb4+ 4.Nbd27
Bogo-Indian Defense: New England Variation3.Nf3 Bb4+ 4.Nfd27
Bogo-Indian Defense: Exchange Variation3.Nf3 Bb4+ 4.Bd2 Bxd2+8Black +3, check
Bogo-Indian Defense: Haiti Variation3.Nf3 Bb4+ 4.Bd2 Nc68
Bogo-Indian Defense: Nimzowitsch Variation3.Nf3 Bb4+ 4.Bd2 Qe78
Bogo-Indian Defense: Retreat Variation3.Nf3 Bb4+ 4.Bd2 Be78
Bogo-Indian Defense: Vitolins Variation3.Nf3 Bb4+ 4.Bd2 c58
Bogo-Indian Defense: Wade-Smyslov Variation3.Nf3 Bb4+ 4.Bd2 a58
Bogo-Indian Defense: Retreat Variation3.g3 Bb4+ 4.Bd2 Be7 5.Bg2 d5 6.Nf311
Bogo-Indian Defense: Retreat Variation3.g3 Bb4+ 4.Bd2 Be7 5.Bg2 d5 6.Nf3 O-O12Black castled
Bogo-Indian Defense: Retreat Variation3.g3 Bb4+ 4.Bd2 Be7 5.Bg2 d5 6.Nf3 O-O 7.O-O13both castled
Bogo-Indian Defense: Retreat Variation3.g3 Bb4+ 4.Bd2 Be7 5.Bg2 d5 6.Nf3 O-O 7.Qc2 c6 8.O-O15both castled
Bogo-Indian Defense: Retreat Variation3.g3 Bb4+ 4.Bd2 Be7 5.Bg2 d5 6.Nf3 Nbd7 7.O-O O-O 8.Qc2 c616both castled
Bogo-Indian Defense: Retreat Variation3.g3 Bb4+ 4.Bd2 Be7 5.Bg2 d5 6.Nf3 Nbd7 7.O-O O-O 8.Qc2 c6 9.b317both castled
Bogo-Indian Defense: Retreat Variation3.g3 Bb4+ 4.Bd2 Be7 5.Bg2 d5 6.Nf3 Nbd7 7.O-O O-O 8.Qc2 c6 9.Rc117both castled
Bogo-Indian Defense: Retreat Variation3.g3 Bb4+ 4.Bd2 Be7 5.Bg2 d5 6.Nf3 Nbd7 7.O-O O-O 8.Qc2 c6 9.Rd117both castled
Bogo-Indian Defense: Retreat Variation3.g3 Bb4+ 4.Bd2 Be7 5.Bg2 d5 6.Nf3 Nbd7 7.O-O O-O 8.Qc2 c6 9.Rd1 h618both castled
Bogo-Indian Defense: Monticelli Trap3.Nf3 b6 4.g3 Bb7 5.Bg2 Bb4+ 6.Bd2 Bxd2+ 7.Qxd2 O-O 8.Nc3 Ne4 9.Qc2 Nxc3 10.Ng519Black +3, Black castled
Bogo-Indian Defense: Retreat Variation3.Nf3 d5 4.g3 Bb4+ 5.Bd2 Be7 6.Bg2 O-O 7.O-O c6 8.Qc2 Nbd7 9.Bf4 b6 10.Nbd219both castled
Bogo-Indian Defense: Retreat Variation3.Nf3 d5 4.g3 Bb4+ 5.Bd2 Be7 6.Bg2 O-O 7.O-O c6 8.Qc2 Nbd7 9.Bf4 b6 10.Nbd2 Ba620both castled

The road to E11

  1. 1.d4 … 1...Nf6two earlier stops: A40, A45
  2. 2.c4A50 Normal Variation
  3. 3.Nf3E10 Anti-Nimzo-Indian
  4. 3...Bb4+E11

The position after 3...Bb4+

White has brought out the knight on f3; Black the knight on f6 and bishop on b4.

WhiteBlackMaterial (pawn units)3939Minor pieces developed12Moves spent on pawns21Pawns on d4, e4, d5, e510Squares attacked in the other half66not castlednot castled

Closest boards in other codes

CodeLineDiffers on
E21Nimzo-Indian Defense: Three Knights Variationtwo squares: b1, c3
D38Queen’s Gambit Declined: Ragozin Defensefour squares: b1, c3, d5, d7
E12Queen’s Indian Defensefour squares: b4, b6, b7, f8
E20Nimzo-Indian Defensefour squares: b1, g1, c3, f3
A32English Opening: Symmetrical Variation, Anti-Benoni Variation, Spielmann Defensefive squares: f3, b4, d4, c7, f8
A31English Opening: Symmetrical Variation, Anti-Benoni Variationsix squares: b4, c5, e6, c7, e7, f8
A46Indian Defense: Knights Variationsix squares: c2, b4, c4, e6, e7, f8

Where lines continue from here

Four named lines filed under other codes pass through the position after 3...Bb4+. They belong to E14, E16, E21.

Volume E

  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

  • Bogo-Indian Defense: Retreat Variation is also reached inside E06 Catalan Opening: Closed, whose order is 1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.g3 Bb4+ 5.Bd2 Be7 6.Bg2.
  • Bogo-Indian Defense: Retreat Variation is also reached inside E06 Catalan Opening: Closed, whose order is 1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.g3 Bb4+ 5.Bd2 Be7 6.Bg2 O-O.
  • Bogo-Indian Defense: Retreat Variation is also reached inside E06 Catalan Opening: Closed, whose order is 1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.g3 Bb4+ 5.Bd2 Be7 6.Bg2 O-O 7.O-O.
  • Bogo-Indian Defense: Retreat Variation is also reached inside E08 Catalan Opening: Closed, whose order is 1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2 Be7 5.Nf3 O-O 6.O-O Nbd7 7.Qc2 c6 8.Bf4 b6 9.Nbd2.
  • Bogo-Indian Defense: Retreat Variation is also reached inside E09 Catalan Opening: Closed, Main Line, whose order is 1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.g3 Be7 5.Bg2 O-O 6.O-O Nbd7 7.Qc2 c6 8.Bf4 b6 9.Nbd2.

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