ecocodes
Volume A · Flank openings‹ A12A14 ›
a1b2c3d4e5f6g7h8
Reference position · White to move

A13 English Opening: Agincourt Defense

A13 holds 16 named lines, all under the name English Opening. It leaves A10 (English Opening) with 1...e6. Lines of 11 other codes continue from its position, the second-widest spread of the 29 English Opening codes. With 16 named lines it is the second-largest code of the 29 English Opening codes. Lines filed under A04, A14 and E14 reach one of its named positions by a different move order.

Score sheet
#WhiteBlack
1c4e6

The move that completes A13

The reference line of A14 plays all of these moves and continues beyond them; A13 is the position reached at 1...e6.

  1. 1...e6 The e-pawn advances to e6, covering d5 and f5, opening a line for the queen on d8 and the bishop on f8.

Lines filed under A13

All 16 share the start 1.c4 and then split two ways at Black’s move 1.

NameAfter the shared startPliesAt the end
English Opening: Agincourt Defense1...e62
English Opening: Agincourt Defense1...e6 2.Nf33
English Opening: Agincourt Defense1...e6 2.Nf3 d54
English Opening: Agincourt Defense, Catalan Defense1...e6 2.Nf3 d5 3.g3 c56
English Opening: Agincourt Defense, Kurajica Defense1...e6 2.Nf3 d5 3.g3 c66
English Opening: Neo-Catalan1...e6 2.Nf3 d5 3.g3 Nf66
English Opening: Agincourt Defense, Bogoljubow Defense1...e6 2.Nf3 d5 3.g3 Nf6 4.Bg2 Bd68
English Opening: Agincourt Defense, Catalan Defense Accepted1...e6 2.Nf3 Nf6 3.g3 d5 4.Bg2 dxc48Black +1
English Opening: Agincourt Defense, Catalan Defense, Semi-Slav Defense1...e6 2.Nf3 Nf6 3.g3 d5 4.Bg2 c68
English Opening: Neo-Catalan Declined1...e6 2.Nf3 d5 3.g3 Nf6 4.Bg2 Be78
English Opening: Romanishin Gambit1...Nf6 2.Nf3 e6 3.g3 a6 4.Bg2 b58
English Opening: Agincourt Defense, Catalan Defense1...e6 2.Nf3 d5 3.g3 b6 4.Bg2 Bb7 5.O-O9White castled
English Opening: Agincourt Defense, Wimpy System1...e6 2.Nf3 Nf6 3.b3 d5 4.Bb2 c5 5.e39
English Opening: Agincourt Defense1...e6 2.Nf3 d5 3.b3 Nf6 4.Bb2 Be7 5.e3 O-O10Black castled
English Opening: Agincourt Defense1...e6 2.Nf3 d5 3.b3 Nf6 4.Bb2 Be7 5.e3 O-O 6.d411Black castled
English Opening: Agincourt Defense, Tarrasch Defense1...e6 2.Nf3 d5 3.g3 Nf6 4.Bg2 c5 5.b3 Nc6 6.O-O Be712White castled

The road to A13

  1. 1.c4A10 English Opening
  2. 1...e6A13

The position after 1...e6

White is to move and has 22 legal moves.

WhiteBlackMaterial (pawn units)3939Minor pieces developed00Moves spent on pawns11Pawns on d4, e4, d5, e500Squares attacked in the other half23not castlednot castled

Codes that branch off from A13

The reference lines of three other codes leave A13 from three of its named positions; “From” gives the last part of that position’s name.

CodeFromMovesReference line
A14Neo-Catalan Declined5.O-OEnglish Opening: Agincourt Defense, Neo-Catalan Declined
A32Agincourt Defense2.d4 c5 3.Nf3 cxd4 4.Nxd4 Nf6English Opening: Symmetrical Variation, Anti-Benoni Variation, Spielmann Defense
A33Agincourt Defense2...Nf6 3.Nc3 c5 4.d4 cxd4 5.Nxd4 Nc6English Opening: Symmetrical Variation, Anti-Benoni Variation, Spielmann Defense

Closest boards in other codes

CodeLineDiffers on
A20English Opening: King’s English Variationtwo squares: e5, e6
A11English Opening: Caro-Kann Defensive Systemfour squares: c6, e6, c7, e7
A15English Opening: Anglo-Indian Defensefour squares: e6, f6, e7, g8
A17English Opening: Anglo-Indian Defense, Hedgehog Systemfour squares: b1, c3, f6, g8
A21English Opening: King’s English Variation, Reversed Sicilianfour squares: b1, c3, e5, e6
A30English Opening: Symmetrical Variationfour squares: c5, e6, c7, e7
C00French Defensefour squares: c2, e2, c4, e4

Where lines continue from here

Besides the codes above, they belong to A07, A15, A17, A18, A19, A30, A40, 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
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  18. 17
  19. 18
  20. 19
  21. 20
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  25. 24
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  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
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  33. 32
  34. 33
  35. 34
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  47. 46
  48. 47
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  51. 50
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  53. 52
  54. 53
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  96. 95
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  100. 99

Other move orders

  • English Opening: Agincourt Defense is also reached inside A04 Zukertort Opening: Shabalov Gambit, whose order is 1.Nf3 e6 2.c4.
  • English Opening: Agincourt Defense is also reached inside A14 Réti Opening: Anglo-Slav Variation, Bogoljubow Variation, Stonewall Line, whose order is 1.Nf3 d5 2.c4 e6.
  • English Opening: Agincourt Defense is also reached inside E14 Queen’s Indian Defense, with e3, whose order is 1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.e3 Be7 5.b3 O-O 6.Bb2.
  • English Opening: Agincourt Defense, Catalan Defense, Semi-Slav Defense is also reached inside A14 Réti Opening: Anglo-Slav Variation, whose order is 1.Nf3 d5 2.c4 c6 3.g3 Nf6 4.Bg2 e6.
  • English Opening: Neo-Catalan is also reached inside A14 Réti Opening: Anglo-Slav Variation, Bogoljubow Variation, Stonewall Line, whose order is 1.Nf3 d5 2.c4 e6 3.g3 Nf6.
  • English Opening: Neo-Catalan Declined is also reached inside A14 Réti Opening: Anglo-Slav Variation, Bogoljubow Variation, Stonewall Line, whose order is 1.Nf3 d5 2.c4 e6 3.g3 Nf6 4.Bg2 Be7.

Open this line in the finderAll English Opening codes