ecocodes
Volume C · Open games and the French Defense‹ C19C21 ›
a1b2c3d4e5f6g7h8
Reference position · White to move

C20 King’s Pawn Game

Also filed here: King’s Pawn Opening, Portuguese Opening, Barnes Opening, Bongcloud Attack, Center Game, English Opening.

C20 holds 30 named lines from seven openings, most of them (20) under King’s Pawn Game. It leaves B00, a position of the same name, with 1...e5. Lines of 79 other codes continue from its position, the widest spread of the 100 codes in volume C. At two plies, its reference line is level for the shortest of the 100 codes in volume C. Material is no longer level at the end of three of its lines; the widest gap, one pawn in White’s favour, comes in King’s Pawn Game: Philidor Gambit.

Score sheet
#WhiteBlack
1e4e5

The move that completes C20

The reference line of C21 plays all of these moves and continues beyond them; C20 is the position reached at 1...e5.

  1. 1...e5 The e-pawn advances two squares to e5, covering d4 and f4, opening a line for the queen on d8 and the bishop on f8.

Lines filed under C20

They begin with two different first moves.

NameAfter the shared startPliesAt the end
King’s Pawn Game1.e4 e52
Bongcloud Attack1.e4 e5 2.Ke23
Center Game1.e4 e5 2.d43
English Opening: The Whale1.e4 e5 2.c43
King’s Pawn Game: Alapin Opening1.e4 e5 2.Ne23
King’s Pawn Game: King’s Head Opening1.e4 e5 2.f33
King’s Pawn Game: Leonardis Variation1.e4 e5 2.d33
King’s Pawn Game: MacLeod Attack1.e4 e5 2.c33
King’s Pawn Game: Mengarini’s Opening1.e4 e5 2.a33
King’s Pawn Game: Napoleon Attack1.e4 e5 2.Qf33
King’s Pawn Game: Tortoise Opening1.e4 e5 2.Bd33
King’s Pawn Game: Wayward Queen Attack1.e4 e5 2.Qh53
King’s Pawn Opening1.e4 e5 2.b33
Portuguese Opening1.e4 e5 2.Bb53
King’s Pawn Game: Bavarian Gambit1.e4 e5 2.c4 d54
King’s Pawn Game: Beyer Gambit1.e4 e5 2.d4 d54
King’s Pawn Game: Clam Variation, King’s Gambit Reversed1.e4 e5 2.d3 f54
King’s Pawn Game: MacLeod Attack, Lasa Gambit1.e4 e5 2.c3 f54
King’s Pawn Game: Wayward Queen Attack, Kiddie Countergambit1.e4 e5 2.Qh5 Nf64
Barnes Opening: Walkerling1.f3 e5 2.e4 Nf6 3.Bc45
King’s Pawn Game: King’s Head Opening1.e4 e5 2.f3 Nf6 3.Nc35
King’s Pawn Opening: Speers1.e4 e5 2.Qg4 Nf6 3.Qf55
Portuguese Opening: Miguel Gambit1.e4 e5 2.Bb5 Bc5 3.b45
Portuguese Opening: Portuguese Gambit1.e4 e5 2.Bb5 Nf6 3.d45
King’s Pawn Game: Clam Variation, Radisch Gambit1.e4 e5 2.d3 Nf6 3.f4 Bc56
King’s Pawn Game: MacLeod Attack, Norwalde Gambit1.e4 e5 2.c3 d5 3.Qh5 Bd66
King’s Pawn Game: Philidor Gambit1.e4 e5 2.d4 d6 3.dxe5 Bd76White +1
King’s Pawn Game: Weber Gambit1.e4 e5 2.d3 d5 3.exd5 c6 4.dxc6 Nxc68White +1
King’s Pawn Game: Wayward Queen Attack, Mellon Gambit1.e4 e5 2.Qh5 Nc6 3.Bc4 Nh6 4.d3 g6 5.Qf3 f6 6.Ne2 d512
King’s Pawn Opening: Van Hooydoon Gambit1.e4 e5 2.Qe2 Nc6 3.c3 Nf6 4.Nf3 Bc5 5.d4 exd4 6.cxd4 Nxd412Black +1

The road to C20

  1. 1.e4B00 King’s Pawn Game
  2. 1...e5C20

The position after 1...e5

White is to move and has 29 legal moves.

WhiteBlackMaterial (pawn units)3939Minor pieces developed00Moves spent on pawns11Pawns on d4, e4, d5, e511Squares attacked in the other half55not castlednot castled

Codes that branch off from C20

The reference lines of five other codes leave C20 from two of its named positions; “From” gives the last part of that position’s name.

CodeFromMovesReference line
C21Center Game2...exd4Center Game Accepted
C23King’s Pawn Game2.Bc4Bishop’s Opening
C25King’s Pawn Game2.Nc3Vienna Game
C30King’s Pawn Game2.f4King’s Gambit
C40King’s Pawn Game2.Nf3King’s Knight Opening

Closest boards in other codes

CodeLineDiffers on
C00French Defensetwo squares: e5, e6
C33King’s Gambit Acceptedthree squares: f2, f4, e5
A20English Opening: King’s English Variationfour squares: c2, e2, c4, e4
B01Scandinavian Defensefour squares: d5, e5, d7, e7
B02Alekhine Defensefour squares: e5, f6, e7, g8
B06Modern Defensefour squares: e5, g6, e7, g7
B07King’s Pawn Game: Maróczy Defensefour squares: d2, d4, d6, d7

Where lines continue from here

Besides the codes above, they belong to C22, C24, C26, C27, C28, C29, C31, C32, C33, C34, C35, C36, C37, C38, C39, C41, C42, C43, C44, C45, C46, C47, C48, C49, C50, C51, C52, C53, C54, C55, C56, C57, C58, C59, C60, C61, C62, C63, C64, C65, C66, C67, C68, C69, C70, C71, C72, C73, C74, C75, C76, C77, C78, C79, C80, C81, C82, C83, C84, C85, C86, C87, C88, C89, C90, C91, C92, C93, C94, C95, C96, C97, C98, C99.

Volume C

  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

  • Barnes Opening: Walkerling is also reached inside C24 Bishop’s Opening: Krejcik Gambit, whose order is 1.e4 e5 2.Bc4 Nf6 3.f3.

Open this line in the finderAll King’s Pawn Game codes