Chess Openings Lab
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King's Gambit Accepted: MacLeod Defense

The MacLeod Defense is 2...exf4 3.Nf3 Nc6, where Black develops the queen's knight instead of holding the pawn with ...g5 or ...d6. Black wants to answer d4 with ...g5 and ...g4 tricks, while White aims to seize the center at once.

Moves
1.e4 e5 2.f4 exf4 3.Nf3 Nc6
ECO
C34
Engine
+0.10 · level (Stockfish 17.1, depth 20)
Played
7,057 games in our lichess sample
White scores
55.5%

Key ideas for both sides

White

  • 4.d4 is the engine's choice and the only move that keeps level play: it takes the center and prepares d5.
  • After 4...g5, push 5.d5 to hit the c6 knight before Black's ...g4 lands.
  • In the sharp line 6.dxc6 gxf3 7.Qxf3, accept doubled c-pawns for open lines and quick development.
  • Avoid slow moves like Nc3 or Bc4 that let Black hold f4 with ...g5 and ...Bg7.

Black

  • Answer 4.d4 with ...g5 and meet 5.d5 with ...g4, attacking the f3 knight in return.
  • After 7.Qxf3, check with ...Qh4+ to keep White's king from castling easily.
  • The c6 knight pressures d4 and e5, so ...g5 and ...Bg7 form a natural pair.
  • If White plays quietly, keep the pawn with ...g5, ...Bg7 and ...d6.

Plans and pawn structure

This is a race between two attacks on knights. White's d4-d5 kicks the c6 knight, while Black's ...g5-g4 kicks the f3 knight. In the main line both knights fall and the structure changes: White gets doubled c-pawns, Black loses the g-pawn cover around the king. The position becomes very open. Whoever brings the queen and rooks into play faster wins the fight, and Black's ...Qh4+ check is a key resource against White's uncastled king.

Where the engine's main line heads: White has doubled c-pawns. White's c-pawns are doubled, usually after ...Bxc3 bxc3. In return White keeps the bishop pair and a solid center.

What the engine plays from here

Stockfish 17.1 at depth 20 rates the position +0.10: level. Its three top choices for White:

  1. +0.10 4.d4 g5 5.d5 g4 6.dxc6 gxf3
  2. −0.53 4.Nc3 g5 5.g3 d6 6.d4 Bg7
  3. −0.59 4.Bc4 g5 5.d4 Bg7 6.h4 h6

Pawns, from White's side.

How it scores on lichess

7,057 rated lichess games reached this position; White scored 55.5%.

under 120052.7%
1200–159955.2%
1600–199956.8%
2000 and up50.9%

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

Where it goes next

  • Blachly Gambit4.Bc4 · 431 games
  • Hamppe-Allgaier Gambit, Thorold Variation4.Nc3 · rare

How to play against it

As White, play 4.d4 and be ready for the forcing line. Do not let Black set up ...g5 and ...Bg7 for free with a slow move. After the trades, castle or tuck the king away quickly and use the open f-file with the queen on f3 and the bishop on f4.

Questions

What are the moves of the King's Gambit Accepted: MacLeod Defense?

The King's Gambit Accepted: MacLeod Defense starts 1.e4 e5 2.f4 exf4 3.Nf3 Nc6. Its ECO code is C34.

Is the King's Gambit Accepted: MacLeod Defense good for Black?

Stockfish 17.1 rates the position +0.10 at depth 20, which is level. In 7,057 lichess games from our sample, White scored 55.5%. A tricky, rare-looking choice that suits Black players who enjoy tactics, but White is fine with 4.d4 and accurate follow-up.

What is the main idea of the King's Gambit Accepted: MacLeod Defense?

Black develops ...Nc6 first and keeps ...g5 and ...g4 tricks in reserve. White must react with 4.d4 and d5, which leads to a forcing line where both sides lose a knight and the board opens.

What should White play next?

The engine's first choice is d4, with Nc3 and Bc4 close behind. 4.d4 grabs the center and sets up d5, the only way to stop Black from keeping f4 for free.

Updated October 2026. Sources and method.