ecocodes
Volume A · Flank openings‹ A60A62 ›
a1b2c3d4e5f6g7h8
Reference position · White to move

A61 Benoni Defense

A61 holds four named lines, all under the name Benoni Defense. It leaves E10 (Indian Defense: Anti-Nimzo-Indian) with 3...c5 4.d5 exd5 5.cxd5 d6 6.Nc3 g6. With four named lines it is the fourth-largest code of the 23 Benoni Defense codes. That final move, by the g-pawn, covers f5 and h5 and opens a line for the bishop on f8.

Score sheet
#WhiteBlack
1d4Nf6
2c4e6
3Nf3c5
4d5exd5
5cxd5d6
6Nc3g6

Lines filed under A61

All four share their first 12 plies, the whole reference line and then split three ways at White’s move 7.

NameAfter the shared startPlies
Benoni Defense(the shared start itself)12
Benoni Defense: Fianchetto Variation7.g313
Benoni Defense: Knight’s Tour Variation7.Nd213
Benoni Defense: Uhlmann Variation7.Bg513

Benoni Defense: Fianchetto Variation

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

Benoni Defense: Knight’s Tour Variation

  1. 7.Nd2 The knight goes from f3 to d2.

Benoni Defense: Uhlmann Variation

  1. 7.Bg5 The bishop leaves c1 for g5, opening a line for the rook on a1 and the queen on d1, attacking the knight on f6.

The road to A61

  1. 1.d4 … 1...Nf6two earlier stops: A40, A45
  2. 2.c4A50 Normal Variation
  3. 3.Nf3E10 Anti-Nimzo-Indian
  4. 6...g6A61

The position after 6...g6

White has brought out the knight on c3 and knight on f3; Black the knight on f6. White has a half-open c-file; Black a half-open e-file. White is to move and has 34 legal moves.

WhiteBlackMaterial (pawn units)3838Minor pieces developed21Moves spent on pawns45Pawns on d4, e4, d5, e510Squares attacked in the other half75not castlednot castled

Codes that branch off from A61

The reference lines of one other code leave A61 from the position after 6...g6, each with its own moves.

CodeMovesReference line
A707.e4Benoni Defense: Classical Variation

Closest boards in other codes

CodeLineDiffers on
D41Queen’s Gambit Declined: Semi-Tarrasch Defensefive squares: d4, d6, e6, g6, g7
A65Benoni Defense: King’s Pawn Linesix squares: g1, e2, f3, e4, g6, g7
A66Benoni Defense: Pawn Storm Variationsix squares: g1, e2, f2, f3, e4, f4
A71Benoni Defense: Classical Variation, Averbakh-Grivas Attacksix squares: c1, e2, e4, g5, g7, f8
D40Queen’s Gambit Declined: Semi-Tarrasch Defenseseven squares: c4, d4, d5, d6, e6, g6, g7
D90Grünfeld Defense: Three Knights Variationseven squares: c4, d4, c5, d5, d6, c7, e7
A62Benoni Defense: Fianchetto Variationeight squares: f1, g2, g3, g7, e8, f8, g8, h8

Where lines continue from here

Six named lines filed under other codes pass through the position after 6...g6. Besides the codes above, they belong to A71, A75, A78.

Volume A

  1. 00
  2. 01
  3. 02
  4. 03
  5. 04
  6. 05
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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 Benoni Defense codes