Chess Openings Lab
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English Opening: Symmetrical Variation, Fianchetto Variation

The Fianchetto Variation arises after 1.c4 Nf6 2.Nc3 c5 3.g3, where White chooses a kingside fianchetto before deciding on Nf3. White wants Bg2 pressure on the long diagonal; Black can strike with ...d5 or build with ...Nc6 and ...e6.

Moves
1.c4 Nf6 2.Nc3 c5 3.g3
ECO
A34
Engine
+0.13 · level (Stockfish 17.1, depth 20)
Played
587 games in our lichess sample
White scores
52.9%

Key ideas for both sides

White

  • After ...d5 cxd5 Nxd5, play Bg2 at once so the bishop hits the d5 knight and the b7 pawn.
  • Use d3 and Be3 against a Black setup with ...Nc7 and ...e5, targeting the c5 pawn.
  • Against ...e6 and ...d5, push d4 to give Black an isolated pawn on d5 after exchanges.

Black

  • Go for ...d5, then retreat the knight to c7 and play ...e5 for a Rubinstein-style central grip.
  • Develop ...Nc6 and ...e6, then ...d5, aiming for a Tarrasch-type pawn structure.
  • Keep the c5 pawn as a guard on d4 so that White's central breaks cost time.

Plans and pawn structure

The early g3 tells Black the bishop will come to g2, so Black has to decide how to meet it. With ...d5 and ...Nc7, Black sets up a bind with c5 and e5, and White aims at the c5 pawn and d4 square. With ...e6 and ...d5, White plays cxd5 and d4 to create an isolated pawn structure in which the g2 bishop is strong. Either way, the center is the main battleground.

What the engine plays from here

Stockfish 17.1 at depth 20 rates the position +0.13: level. Its three top choices for Black:

  1. +0.13 3...d5 4.cxd5 Nxd5 5.Bg2 Nc7 6.d3
  2. +0.29 3...Nc6 4.Bg2 e6 5.Nf3 d5 6.cxd5
  3. +0.31 3...e6 4.Nf3 d5 5.cxd5 exd5 6.d4

Pawns, from White's side.

How it scores on lichess

587 rated lichess games reached this position; White scored 52.9%.

1200–159954.7%
1600–199953.3%
2000 and up51.2%

Light: White wins. Grey: draws. Dark: Black wins. About the sample.

Where it goes next

  • Symmetrical Variation, Rubinstein Variation3...d5 · rare

How to play against it

For Black: play ...d5 or ...Nc6 with ...e6, rather than slow moves. After cxd5 Nxd5, retreat the knight to c7 so it is not exposed on the long diagonal. Avoid leaving b7 undefended while the g2 bishop is aiming at it.

Questions

What are the moves of the English Opening: Symmetrical Variation, Fianchetto Variation?

The English Opening: Symmetrical Variation, Fianchetto Variation starts 1.c4 Nf6 2.Nc3 c5 3.g3. Its ECO code is A34.

Is the English Opening: Symmetrical Variation, Fianchetto Variation good for White?

Stockfish 17.1 rates the position +0.13 at depth 20, which is level. In 587 lichess games from our sample, White scored 52.9%. Solid for White players who like the long diagonal; Black gets good play with either main setup.

What is the main idea of the English Opening: Symmetrical Variation, Fianchetto Variation?

White commits to a fianchetto early, so the bishop on g2 pressures Black's center. Black can respond with ...d5 and ...Nc7 for a bind, or ...e6 and ...d5 for a classical center.

What should Black play next?

The engine's first choice is d5, with Nc6 and e6 close behind. ...d5 takes the center before White can add Nf3 and d4.

Updated October 2026. Sources and method.