ecocodes
Volume A · Flank openings‹ A04A06 ›
a1b2c3d4e5f6g7h8
Reference position · White to move

A05 Zukertort Opening

Also filed here: King’s Indian Attack, Polish Opening.

A05 holds 13 named lines from three openings, most of them (seven) under Zukertort Opening. It leaves A04, a position of the same name, with 1...Nf6. Lines filed under A14 reach one of its named positions by a different move order. None of its 13 lines contains a capture.

Score sheet
#WhiteBlack
1Nf3Nf6

Moves only A05 plays

Same as A04 up to 1.Nf3, then:

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

Lines filed under A05

All 13 share their first two plies, the whole reference line and then split seven ways at White’s move 2.

NameAfter the shared startPliesAt the end
Zukertort Opening(the shared start itself)2
Zukertort Opening: Lemberger Gambit2.e43
Zukertort Opening: Nimzo-Larsen Variation2.b33
Zukertort Opening: Quiet System2.e33
King’s Indian Attack2.g3 d54
King’s Indian Attack: Spassky Variation2.g3 b54
King’s Indian Attack: Symmetrical Defense2.g3 g64
Zukertort Opening2.Nc3 Nc64
King’s Indian Attack: Smyslov Variation2.g3 g6 3.b45
Polish Opening: Zukertort System2.b4 g6 3.Bb25
Zukertort Opening: Myers Polish Attack2.a4 g6 3.b45
King’s Indian Attack: Wahls Defense2.g3 g6 3.Bg2 Bg7 4.O-O O-O 5.d3 d510both castled
Zukertort Opening: Double Fianchetto Attack2.g3 g6 3.b3 Bg7 4.Bb2 O-O 5.Bg2 d6 6.O-O11both castled

The road to A05

  1. 1.Nf3A04 Zukertort Opening
  2. 1...Nf6A05

The position after 1...Nf6

White has brought out the knight on f3; Black the knight on f6. White is to move and has 22 legal moves.

WhiteBlackMaterial (pawn units)3939Minor pieces developed11Moves spent on pawns00Pawns on d4, e4, d5, e500Squares attacked in the other half22not castlednot castled

Closest boards in other codes

CodeLineDiffers on
A46Indian Defense: Knights Variationtwo squares: d2, d4
A06Zukertort Openingfour squares: d5, f6, d7, g8
A15English Opening: Anglo-Indian Defensefour squares: g1, c2, f3, c4
A45Indian Defensefour squares: g1, d2, f3, d4
A47Pseudo Queen’s Indian Defensefour squares: d2, d4, b6, b7
A48East Indian Defensefour squares: d2, d4, g6, g7
B02Alekhine Defensefour squares: g1, e2, f3, e4

Where lines continue from here

Twelve named lines filed under other codes pass through the position after 1...Nf6. They belong to A07, A11, A12.

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

Other move orders

  • King’s Indian Attack is also reached inside A14 English Opening: Agincourt Defense, Neo-Catalan Declined, whose order is 1.Nf3 d5 2.g3 Nf6.

Open this line in the finderAll Zukertort Opening codes