Chess Openings Lab
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Center Game: Halasz-McDonnell Gambit

The Halasz-McDonnell Gambit is 3.f4, where White leaves the d4 pawn in Black's hands and pushes the f-pawn instead of recapturing. White wants a big center with e5 and quick piece play, but the move weakens the king and is dubious against accurate defense.

Moves
1.e4 e5 2.d4 exd4 3.f4
ECO
C21
Engine
−1.27 · a clear edge for Black (Stockfish 17.1, depth 20)
Played
1,615 games in our lichess sample
White scores
52.8%

Key ideas for both sides

White

  • Push e5 to cramp the f6 square and keep Black's knight out of its best post.
  • Develop with Nf3 and Bd3, then try to win the d4 pawn back with Nd2 and Nb3, as in the engine line.
  • Block a check on b4 with c3 or Bd2. After ...dxc3, Nxc3 gives White a lead in development.
  • Castle short quickly. With the f-pawn gone, the king has weak dark squares.

Black

  • Play 3...Nc6 to support d4, then ...d5 to hit e4 before White builds the center.
  • If White pushes e5, the engine line uses ...Nh6 heading for f5, where the knight hits d4 and e3.
  • Use ...Bb4+ to trade off White's dark bishop or pull a piece to d2.
  • 3...Bc5 also guards the d4 pawn and keeps an eye on g1.

Plans and pawn structure

Black is a pawn up with an extra pawn on d4 that cramps White. The plan is to keep it with ...Nc6 and ...Bc5, then open the center with ...d5. If White pushes e5, Black's knight reroutes ...Nh6 and ...Nf5 to hit d4 and e3. White needs Nd2, Nb3 and Nf3 to win d4 back, but each move is slow. With f4 played, the white king is exposed on the e1-h4 diagonal, so long-term Black has the safer king and the better pawns.

What the engine plays from here

Stockfish 17.1 at depth 20 rates the position −1.27: a clear edge for Black. Its three top choices for Black:

  1. −1.27 3...Nc6 4.Nd2 d5 5.e5 Nh6 6.Nb3
  2. −1.19 3...Bc5 4.Nf3 d5 5.Nbd2 Nh6 6.Bd3
  3. −0.97 3...Bb4+ 4.c3 dxc3 5.Nxc3 Qe7 6.Bd2

Pawns, from White's side.

How it scores on lichess

1,615 rated lichess games reached this position; White scored 52.8%.

under 120048.8%
1200–159955.7%
1600–199952.0%
2000 and up48.4%

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

Where it goes next

  • Halasz-McDonnell Gambit, Crocodile Variation3...Bc5 · rare

How to play against it

As Black, do not take more pawns. Defend d4 with ...Nc6 or ...Bc5, play ...d5 to challenge e4, and develop toward f5 with the g8 knight. White scored about even in our sample, so expect a fight, but sound development refutes the idea.

Questions

What are the moves of the Center Game: Halasz-McDonnell Gambit?

The Center Game: Halasz-McDonnell Gambit starts 1.e4 e5 2.d4 exd4 3.f4. Its ECO code is C21.

Is the Center Game: Halasz-McDonnell Gambit good for White?

Stockfish 17.1 rates the position −1.27 at depth 20, which is a clear edge for Black. In 1,615 lichess games from our sample, White scored 52.8%. A dubious gambit that only works if Black defends passively; it suits White players who want a surprise, not a sound repertoire line.

What is the main idea of the Center Game: Halasz-McDonnell Gambit?

White leaves the d4 pawn alone and pushes f4 to build a center with e4 and e5. The idea is quick space, but it weakens the king and lets Black keep the extra pawn with ...Nc6, ...Bc5 and ...d5.

What should Black play next?

The engine's first choice is Nc6, with Bc5 and Bb4+ close behind. 3...Nc6 protects d4 and prepares ...d5, so Black keeps the pawn and opens lines toward White's weakened king.

Updated October 2026. Sources and method.