ecocodes
Volume A · Flank openings‹ A85A87 ›
a1b2c3d4e5f6g7h8
Reference position · Black to move

A86 Dutch Defense: Fianchetto Variation

A86 holds three named lines, all under the name Dutch Defense. It leaves A84 (Dutch Defense: Normal Variation) with 3.g3. Lines of 11 other codes continue from its position, the third-widest spread of the 20 Dutch Defense codes. Black, to move in that position, has 24 legal moves, the fifth-lowest count of the 20 Dutch Defense codes. At five plies, its reference line is the fifth-shortest of the 20 Dutch Defense codes.

Score sheet
#WhiteBlack
1d4f5
2c4Nf6
3g3

The move that completes A86

The reference line of A87 plays all of these moves and continues beyond them; A86 is the position reached at 3.g3.

  1. 3.g3 The g-pawn advances to g3, covering f4 and h4, opening a line for the bishop on f1.

Lines filed under A86

All three share their first five plies, the whole reference line and then split two ways at Black’s move 3.

NameAfter the shared startPlies
Dutch Defense: Fianchetto Variation(the shared start itself)5
Dutch Defense: Leningrad Variation3...g66
Dutch Defense: Hort-Antoshin System3...d6 4.Bg2 c6 5.Nc3 Qc710

Dutch Defense: Leningrad Variation

  1. 3...g6 The g-pawn advances to g6, covering f5 and h5, opening a line for the bishop on f8.

Dutch Defense: Hort-Antoshin System

  1. 3...d6 The d-pawn advances to d6, covering c5 and e5, opening a line for the bishop on c8 and the queen on d8.
  2. 4.Bg2 The bishop leaves f1 for g2, guarding the rook on h1.
  3. 4...c6 The c-pawn advances to c6, covering b5 and d5, opening a line for the queen on d8.
  4. 5.Nc3 The knight leaves b1 for c3, opening a line for the rook on a1.
  5. 5...Qc7 The queen goes from d8 to c7.

The road to A86

  1. 1.d4 … 1...f5two earlier stops: A40, A80
  2. 2.c4A84 Dutch Defense
  3. 2...Nf6A84 Normal Variation
  4. 3.g3A86

The position after 3.g3

Black has brought out the knight on f6; White has not yet moved a knight or bishop.

WhiteBlackMaterial (pawn units)3939Minor pieces developed01Moves spent on pawns31Pawns on d4, e4, d5, e510Squares attacked in the other half62not castlednot castled

Codes that branch off from A86

The reference lines of two other codes leave A86 from two of its named positions; “From” gives the last part of that position’s name.

CodeFromMovesReference line
A87Leningrad Variation4.Bg2 Bg7 5.Nf3Dutch Defense: Leningrad Variation
A90Fianchetto Variation3...e6 4.Bg2Dutch Defense: Classical Variation

Closest boards in other codes

CodeLineDiffers on
A50Indian Defense: Normal Variationfour squares: g2, g3, f5, f7
A81Dutch Defense: Fianchetto Attackfour squares: c2, c4, f6, g8
A85Dutch Defense: Queen’s Knight Variationfour squares: b1, g2, c3, g3
E00Catalan Openingfour squares: f5, e6, e7, f7
A91Dutch Defense: Classical Variationfive squares: f1, g2, e6, e7, f8
A15English Opening: Anglo-Indian Defensesix squares: d2, g2, g3, d4, f5, f7
A45Indian Defensesix squares: c2, g2, g3, c4, f5, f7

Where lines continue from here

Besides the codes above, they belong to A91, A92, A93, A94, A95, A96, A97, A98, A99.

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
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  79. 78
  80. 79
  81. 80
  82. 81
  83. 82
  84. 83
  85. 84
  86. 85
  87. 86
  88. 87
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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

Open this line in the finderAll Dutch Defense codes