Chess Openings Lab
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Hungarian Opening: Catalan Formation

The Catalan Formation of the Hungarian Opening comes after 1.g3 d5 2.Bg2 e6, with Black building a solid d5 and e6 pawn pair in front of the g2 bishop. White wants d4 or c4 to make the fianchetto bite, while Black plans ...c5 and ...Nf6 for a broad center.

Moves
1.g3 d5 2.Bg2 e6
ECO
A00
Engine
+0.30 · a slight edge for White (Stockfish 17.1, depth 20)
Played
3,011 games in our lichess sample
White scores
53.2%

Key ideas for both sides

White

  • Play 3.d4 to stop Black from setting up ...c5 and ...d4; after ...cxd4 recapture with the knight on d4.
  • Follow with Nf3, c4 and short castling, so the g2 bishop and the c4 pawn both lean on d5.
  • The c4 push at once invites ...d4, giving Black space; answer with Nf3, d3 and e3 to chip away at that pawn.

Black

  • Claim space with ...c5, then ...Nf6 and ...Nc6, a Queen's Gambit shape with colors reversed where you control the center squares.
  • After cxd4 and Nxd4, look for ...e5 to gain time on the knight, as both top engine lines show.
  • Mind the c8 bishop: with ...e6 played it may need ...b6 and a fianchetto on b7 to find a good diagonal.

Plans and pawn structure

The fight is over d5 and the long diagonal. White's bishop on g2 already eyes b7, so c4 and Nf3 add pressure until Black must give up the center or defend it with ...c6. If Black gets ...c5 and ...Nc6 in, Black has a wide center and White plays against it with d4 trades and piece pressure. After the engine sequence with ...e5, Black owns the central pawns and White targets d5 and e5 with c4, Nc3 and the g2 bishop.

What the engine plays from here

Stockfish 17.1 at depth 20 rates the position +0.30: a slight edge for White. Its three top choices for White:

  1. +0.30 3.d4 c5 4.Nf3 cxd4 5.Nxd4 Nf6
  2. +0.25 3.Nf3 c5 4.d4 cxd4 5.Nxd4 Nf6
  3. +0.15 3.c4 d4 4.Nf3 c5 5.d3 Nc6

Pawns, from White's side.

How it scores on lichess

3,011 rated lichess games reached this position; White scored 53.2%.

under 120050.6%
1200–159952.4%
1600–199954.4%
2000 and up53.6%

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

How to play against it

As White, don't hand Black a free center: play 3.d4 or Nf3 first, then c4 once the knight covers d4. If Black plays ...c5 and ...cxd4, take back with the knight and be ready for ...e5 kicking it. Avoid an early e4, which leaves the g2 bishop staring at its own pawn.

Questions

What are the moves of the Hungarian Opening: Catalan Formation?

The Hungarian Opening: Catalan Formation starts 1.g3 d5 2.Bg2 e6. Its ECO code is A00.

Is the Hungarian Opening: Catalan Formation good for Black?

Stockfish 17.1 rates the position +0.30 at depth 20, which is a slight edge for White. In 3,011 lichess games from our sample, White scored 53.2%. A calm, flexible setup that suits positional players on both sides and rewards knowing standard d4 and c4 pawn structures.

What is the main idea of the Hungarian Opening: Catalan Formation?

Black builds a solid d5 and e6 center that the g2 bishop cannot easily crack. White adds d4, Nf3 and c4 to press on d5, while Black answers with ...c5 and ...Nf6 for a broad center.

What should White play next?

The engine's first choice is d4, with Nf3 and c4 close behind. 3.d4 grabs central space right away and meets ...c5 with an exchange and a knight recapture on d4.

Updated October 2026. Sources and method.