ecocodes
Volume A · Flank openings‹ A36A38 ›
a1b2c3d4e5f6g7h8
Reference position · Black to move

A37 English Opening: Symmetrical Variation, Three Knights, Fianchetto Variation

A37 holds nine named lines, all under the name English Opening. It leaves A36 (English Opening: Symmetrical Variation, Ultra-Symmetrical Variation) with 5.Nf3. At nine plies, its reference line is the fifth-longest of the 29 English Opening codes. None of its nine lines contains a capture.

Score sheet
#WhiteBlack
1c4c5
2Nc3Nc6
3g3g6
4Bg2Bg7
5Nf3

Moves only A37 plays

Same as A36 up to 3.g3, then:

  1. 3...g6 The g-pawn advances to g6, covering f5 and h5, opening a line for the bishop on f8.
  2. 4.Bg2 The bishop leaves f1 for g2, guarding the rook on h1, attacking the knight on c6.
  3. 4...Bg7 The bishop leaves f8 for g7, guarding the rook on h8, attacking the knight on c3.
  4. 5.Nf3 The knight leaves g1 for f3, opening a line for the rook on h1.

Lines filed under A37

All nine share the start 1.c4 c5 and then split two ways at White’s move 2.

NameAfter the shared startPliesAt the end
English Opening: Symmetrical Variation, Three Knights, Fianchetto Variation2.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.Nf39
English Opening: Symmetrical Variation, Botvinnik System Reversed, with Nf32.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.Nf3 e510
English Opening: Symmetrical Variation, Three Knights, Fianchetto Variation2.Nf3 Nc6 3.g3 g6 4.Bg2 Bg7 5.O-O d6 6.Nc311White castled
English Opening: Symmetrical Variation, Three Knights, Fianchetto Variation2.Nf3 Nc6 3.g3 g6 4.Bg2 Bg7 5.O-O e6 6.Nc311White castled
English Opening: Symmetrical Variation, Botvinnik System Reversed, with Nf32.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.Nf3 e5 6.O-O d612White castled
English Opening: Symmetrical Variation, Botvinnik System Reversed, with Nf32.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.Nf3 e5 6.O-O Nge712White castled
English Opening: Symmetrical Variation, Botvinnik System Reversed, with Nf32.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.Nf3 e5 6.O-O Nge7 7.a313White castled
English Opening: Symmetrical Variation, Botvinnik System Reversed, with Nf32.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.Nf3 e5 6.O-O Nge7 7.d313White castled
English Opening: Symmetrical Variation, Botvinnik System Reversed, with Nf32.Nc3 Nc6 3.g3 g6 4.Bg2 Bg7 5.Nf3 e5 6.O-O Nge7 7.d3 d614White castled

The road to A37

One of the six named positions on the way are reached by a move order other than their own.

  1. 1.c4 … 2...Nc6four earlier stops: A10, A30, A34, A35
  2. 3.g3A36 Fianchetto Variation
  3. 4...Bg7A36 Ultra-Symmetrical Variation by another order
  4. 5.Nf3A37

The position after 5.Nf3

White has brought out the knight on c3, knight on f3 and bishop on g2; Black the knight on c6 and bishop on g7. Black could capture with Bxc3. Black is to move and has 31 legal moves.

WhiteBlackMaterial (pawn units)3939Minor pieces developed32Moves spent on pawns22Pawns on d4, e4, d5, e500Squares attacked in the other half43not castlednot castled

Closest boards in other codes

CodeLineDiffers on
A38English Opening: Symmetrical Variation, Full Symmetry Linetwo squares: f6, g8
A35English Opening: Symmetrical Variation, Two Knights Variationeight squares: f1, g1, g2, f3, g3, g6, g7, f8
A26English Opening: King’s English Variation, Closed System, Full Symmetryten squares: g1, d2, d3, f3, c5, e5, d6, c7 …
A27English Opening: King’s English Variation, Three Knights Systemten squares: f1, g2, g3, c5, e5, g6, c7, e7 …
A34English Opening: Symmetrical Variation, Normal Variationten squares: f1, g1, g2, f3, g3, c6, g6, g7 …
B25Sicilian Defense: Closedten squares: g1, c2, d2, e2, d3, f3, c4, e4 …
D34Tarrasch Defense: Prague Variation, Main Lineten squares: d2, c4, d4, d5, f6, g6, d7, e7 …

Where lines continue from here

One named line filed under other codes passes through the position after 5.Nf3. It belongs to A38.

Volume A

  1. 00
  2. 01
  3. 02
  4. 03
  5. 04
  6. 05
  7. 06
  8. 07
  9. 08
  10. 09
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  99. 98
  100. 99

Open this line in the finderAll English Opening codes