ecocodes
Volume A · Flank openings‹ A14A16 ›
a1b2c3d4e5f6g7h8
Reference position · White to move

A15 English Opening: Anglo-Indian Defense

Also filed here: English Orangutan.

A15 holds 15 named lines from two openings, most of them (13) under English Opening. It leaves A10 (English Opening) with 1...Nf6. Lines of ten other codes continue from its position, the third-widest spread of the 29 English Opening codes. With 15 named lines it is the third-largest code of the 29 English Opening codes. Lines filed under A12 and A13 reach one of its named positions by a different move order.

Score sheet
#WhiteBlack
1c4Nf6

The move that completes A15

The reference line of A16 plays all of these moves and continues beyond them; A15 is the position reached at 1...Nf6.

  1. 1...Nf6 The knight leaves g8 for f6, opening a line for the rook on h8.

Lines filed under A15

All 15 share the start 1.c4 and then split two ways at Black’s move 1.

NameAfter the shared startPlies
English Opening: Anglo-Indian Defense1...Nf62
English Opening: Anglo-Indian Defense, King’s Knight Variation1...Nf6 2.Nf33
English Orangutan1...Nf6 2.b43
English Opening: Anglo-Indian Defense, King’s Indian Formation1...Nf6 2.Nf3 g64
English Opening: Anglo-Indian Defense, Old Indian Formation1...Nf6 2.Nf3 d64
English Opening: Anglo-Indian Defense, Queen’s Indian Formation1...Nf6 2.Nf3 b64
English Opening: Anglo-Indian Defense, Scandinavian Defense1...Nf6 2.Nf3 d54
English Orangutan1...Nf6 2.Nf3 g6 3.b45
English Opening: Anglo-Indian Defense, Grünfeld Formation1...Nf6 2.Nf3 g6 3.g3 d56
English Opening: Anglo-Indian Defense, Romanishin Variation1...e6 2.Nf3 Nf6 3.g3 a66
English Opening: Anglo-Indian Defense, Scandinavian Defense, Exchange Variation1...Nf6 2.Nf3 d5 3.cxd5 Nxd56
English Opening: Anglo-Indian Defense, Slav Formation1...Nf6 2.Nf3 g6 3.g3 c66
English Opening: Anglo-Indian Defense, Anti-Anti-Grünfeld1...Nf6 2.Nc3 g6 3.Nf3 Bg7 4.e47
English Opening: Anglo-Indian Defense, King’s Indian Formation, Double Fianchetto1...Nf6 2.Nf3 g6 3.g3 b6 4.Bg2 Bb78
English Opening: Anglo-Indian Defense, Queen’s Indian Formation1...e6 2.Nf3 Nf6 3.g3 b6 4.Bg2 Bb78

The road to A15

  1. 1.c4A10 English Opening
  2. 1...Nf6A15

The position after 1...Nf6

Black has brought out the knight on f6; White has not yet moved a knight or bishop. White is to move and has 22 legal moves.

WhiteBlackMaterial (pawn units)3939Minor pieces developed01Moves spent on pawns10Pawns on d4, e4, d5, e500Squares attacked in the other half22not castlednot castled

Codes that branch off from A15

The reference lines of one other code leave A15 from the position after 1...Nf6, each with its own moves.

CodeMovesReference line
A162.Nc3English Opening: Anglo-Indian Defense, Queen’s Knight Variation

Closest boards in other codes

CodeLineDiffers on
A50Indian Defense: Normal Variationtwo squares: d2, d4
A05Zukertort Openingfour squares: g1, c2, f3, c4
A11English Opening: Caro-Kann Defensive Systemfour squares: c6, f6, c7, g8
A13English Opening: Agincourt Defensefour squares: e6, f6, e7, g8
A17English Opening: Anglo-Indian Defense, Hedgehog Systemfour squares: b1, c3, e6, e7
A20English Opening: King’s English Variationfour squares: e5, f6, e7, g8
A22English Opening: King’s English Variation, Two Knights Variationfour squares: b1, c3, e5, e7

Where lines continue from here

Besides the codes above, they belong to A10, A12, A13, A17, A31, A34, A38, A39, D71.

Volume A

  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
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  98. 97
  99. 98
  100. 99

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
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  70. 69
  71. 70
  72. 71
  73. 72
  74. 73
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  90. 89
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  92. 91
  93. 92
  94. 93
  95. 94
  96. 95
  97. 96
  98. 97
  99. 98
  100. 99

Other move orders

  • English Opening: Anglo-Indian Defense, King’s Knight Variation is also reached inside A12 Réti Opening: Anglo-Slav Variation, New York System, whose order is 1.Nf3 Nf6 2.c4.
  • English Opening: Anglo-Indian Defense, Romanishin Variation is also reached inside A13 English Opening: Romanishin Gambit, whose order is 1.c4 Nf6 2.Nf3 e6 3.g3 a6.

Open this line in the finderAll English Opening codes