ecocodes
Volume A · Flank openings‹ A19A21 ›
a1b2c3d4e5f6g7h8
Reference position · White to move

A20 English Opening: King’s English Variation

A20 holds five named lines, all under the name English Opening. It leaves A10 (English Opening) with 1...e5. Lines of nine other codes continue from its position, the fourth-widest spread of the 29 English Opening codes. That final move, by the e-pawn, covers d4 and f4 and opens a line for the queen on d8 and the bishop on f8.

Score sheet
#WhiteBlack
1c4e5

Lines filed under A20

All five share their first two plies, the whole reference line and then split three ways at White’s move 2.

NameAfter the shared startPliesAt the end
English Opening: King’s English Variation(the shared start itself)2
English Opening: King’s English Variation, Nimzowitsch Variation2.Nf33
English Opening: Drill Variation2.g3 h54
English Opening: King’s English Variation, Nimzowitsch-Flohr Variation2.Nf3 e44
English Opening: King’s English Variation, Kahiko-Hula Gambit2.e3 Nf6 3.f4 exf4 4.Nf37Black +1

The road to A20

  1. 1.c4A10 English Opening
  2. 1...e5A20

The position after 1...e5

White is to move and has 22 legal moves.

WhiteBlackMaterial (pawn units)3939Minor pieces developed00Moves spent on pawns11Pawns on d4, e4, d5, e501Squares attacked in the other half25not castlednot castled

Codes that branch off from A20

The reference lines of one other code leave A20 from the position after 1...e5, each with its own moves.

CodeMovesReference line
A212.Nc3English Opening: King’s English Variation, Reversed Sicilian

Closest boards in other codes

CodeLineDiffers on
A13English Opening: Agincourt Defensetwo squares: e5, e6
A11English Opening: Caro-Kann Defensive Systemfour squares: e5, c6, c7, e7
A15English Opening: Anglo-Indian Defensefour squares: e5, f6, e7, g8
A22English Opening: King’s English Variation, Two Knights Variationfour squares: b1, c3, f6, g8
A25English Opening: King’s English Variation, Reversed Closed Sicilianfour squares: b1, c3, c6, b8
A30English Opening: Symmetrical Variationfour squares: c5, e5, c7, e7
A51Indian Defense: Budapest Gambitfour squares: d2, d4, f6, g8

Where lines continue from here

Besides the codes above, they belong to A22, A23, A24, A25, A26, A27, A28, A29.

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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  44. 43
  45. 44
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  51. 50
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  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