ecocodes
Volume A · Flank openings‹ A09A11 ›
a1b2c3d4e5f6g7h8
Reference position · Black to move

A10 English Opening

A10 holds 20 named lines, all under the name English Opening. Its reference line is a single first move, played from the initial position. Lines of 35 other codes continue from its position, the widest spread of the 29 English Opening codes. Black, to move in that position, has 20 legal moves, the fewest of the 29 English Opening codes. With 20 named lines it is the largest code of the 29 English Opening codes.

Score sheet
#WhiteBlack
1c4

What each move does

  1. 1.c4 The c-pawn advances two squares to c4, covering b5 and d5, opening a line for the queen on d1.

Lines filed under A10

All 20 share their first one ply, the whole reference line and then split seven ways at Black’s move 1.

NameAfter the shared startPliesAt the end
English Opening(the shared start itself)1
English Opening: Anglo-Dutch Defense1...f52
English Opening: Anglo-Lithuanian Variation1...Nc62
English Opening: Anglo-Scandinavian Defense1...d52
English Opening: Great Snake Variation1...g62
English Opening: Jaenisch Gambit1...b52
English Opening: Myers Defense1...g52
English Opening: Achilles-Omega Gambit1...Nf6 2.e43
English Opening: Anglo-Dutch Defense, Hickmann Gambit1...f5 2.e43
English Opening: Wade Gambit1...f5 2.g43
English Opening: Adorjan Defense1...g6 2.e4 e54
English Opening: Anglo-Scandinavian Defense, Löhn Gambit1...d5 2.cxd5 e64White +1
English Opening: Anglo-Scandinavian Defense, Schulz Gambit1...d5 2.cxd5 Nf64White +1
English Opening: Myers Gambit1...g5 2.d4 Bg74
English Opening: Zilbermints Gambit1...g5 2.d4 e54
English Opening: Anglo-Dutch Variation, Chabanon Gambit1...f5 2.Nf3 d6 3.e45
English Opening: Anglo-Dutch Variation, Ferenc Gambit1...f5 2.Nc3 Nf6 3.e45
English Opening: Anglo-Scandinavian Defense, Malvinas Variation1...d5 2.cxd5 Qxd5 3.Nc3 Qa56
English Opening: Porcupine Variation1...f5 2.Nc3 Nf6 3.e4 fxe4 4.g47Black +1
English Opening: King’s English Variation, Botvinnik System, Prickly Pawn Pass System1...g6 2.Nc3 Bg7 3.g3 Nf6 4.Bg2 O-O 5.e4 d6 6.Nge2 e5 7.O-O c6 8.d3 a616both castled

The position after 1.c4

WhiteBlackMaterial (pawn units)3939Minor pieces developed00Moves spent on pawns10Pawns on d4, e4, d5, e500Squares attacked in the other half20not castlednot castled

Codes that branch off from A10

The reference lines of five other codes leave A10 from the position after 1.c4, each with its own moves.

CodeMovesReference line
A111...c6English Opening: Caro-Kann Defensive System
A131...e6English Opening: Agincourt Defense
A151...Nf6English Opening: Anglo-Indian Defense
A201...e5English Opening: King’s English Variation
A301...c5English Opening: Symmetrical Variation

Closest boards in other codes

CodeLineDiffers on
A00Van Geet Openingfour squares: b1, c2, c3, c4
A01Nimzo-Larsen Attackfour squares: b2, c2, b3, c4
A02Bird Openingfour squares: c2, f2, c4, f4
A04Zukertort Openingfour squares: g1, c2, f3, c4
A09Réti Openingfour squares: g1, f3, d5, d7
A16English Opening: Anglo-Indian Defense, Queen’s Knight Variationfour squares: b1, c3, f6, g8
A21English Opening: King’s English Variation, Reversed Sicilianfour squares: b1, c3, e5, e7

Where lines continue from here

Besides the codes above, they belong to A07, A12, A14, A16, A17, A18, A19, A21, A22, A23, A24, A25, A26, A27, A28, A29, A31, A32, A33, A34, A35, A36, A37, A38, A39, A40, D32, D41, D71, E06.

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
  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

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
  69. 68
  70. 69
  71. 70
  72. 71
  73. 72
  74. 73
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  90. 89
  91. 90
  92. 91
  93. 92
  94. 93
  95. 94
  96. 95
  97. 96
  98. 97
  99. 98
  100. 99

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

Open this line in the finderAll English Opening codes