Semi-Slav Defense: Marshall Gambit
The Marshall Gambit is 4.e4 against the Semi-Slav triangle, where White strikes in the center before Black has played ...Nf6. White is willing to give the d4 pawn for dark-square play and fast development, while Black can take material but must keep the king safe.
- Moves
- 1.d4 d5 2.c4 e6 3.Nc3 c6 4.e4
- ECO
- D31
- Engine
- +0.54 · a slight edge for White (Stockfish 17.1, depth 20)
- Played
- 976 games in our lichess sample
- White scores
- 58.8%
Key ideas for both sides
White
- After ...dxe4 Nxe4 Bb4+, block with Bd2 and allow ...Qxd4, then Bxb4 and Be2 give strong dark-square pressure.
- Aim the b4 bishop at d6 and f8, keeping Black's king from castling easily.
- Develop with Nf3, O-O and a rook to d1, using open lines against the black queen.
- If Black declines with ...h6, push e5 and build a space edge before Black finishes development.
Black
- 4...dxe4 is the main reply; after Nxe4 Bb4+, Black can take on d4 and later on e4 with check.
- After the queen grabs on e4, get the queen back to safety and play ...Na6 or ...c5 to fight the b4 bishop.
- Do not leave the king in the center for long; consider ...Ne7 and ...O-O when possible.
- 4...Bb4 transposes to similar ideas; 4...h6 is too slow and lets White play e5 with a clear edge.
Plans and pawn structure
After the gambit, Black has an extra pawn but weak dark squares around d6 and e7. White's bishop on b4 controls those squares, and the queen and rooks join quickly. White wants Nf3, O-O, Qd6 ideas and pressure on the d-file. Black wants to trade queens, untangle with ...Na6 and ...Ne7 and complete castling, then use the extra pawn. If Black survives the first phase, the extra pawn starts to matter.
What the engine plays from here
Stockfish 17.1 at depth 20 rates the position +0.54: a slight edge for White. Its three top choices for Black:
- +0.54 4...dxe4 5.Nxe4 Bb4+ 6.Bd2 Qxd4 7.Bxb4
- +0.62 4...Bb4 5.Bd2 dxe4 6.Nxe4 Qxd4 7.Bxb4
- +0.95 4...h6 5.e5 Ne7 6.Nf3 b6 7.Be2
Pawns, from White's side.
How it scores on lichess
976 rated lichess games reached this position; White scored 58.8%.
Light: White wins. Grey: draws. Dark: Black wins. About the sample.
Where it goes next
- Marshall Gambit, Tolush Variation4...dxe4 · rare
How to play against it
With Black, take on e4 and play the forcing check with ...Bb4+. Know the key line through ...Qxd4 and the capture on e4 with check. Avoid slow moves like 4...h6. Once you have the material, trade queens if possible and get the king safe.
Questions
What are the moves of the Semi-Slav Defense: Marshall Gambit?
The Semi-Slav Defense: Marshall Gambit starts 1.d4 d5 2.c4 e6 3.Nc3 c6 4.e4. Its ECO code is D31.
Is the Semi-Slav Defense: Marshall Gambit good for White?
Stockfish 17.1 rates the position +0.54 at depth 20, which is a slight edge for White. In 976 lichess games from our sample, White scored 58.8%. A dangerous practical weapon for attacking White players, while Black needs to know the forcing line and play precisely to keep the extra pawn.
What is the main idea of the Semi-Slav Defense: Marshall Gambit?
White offers the d4 pawn to open the center and fight for dark squares. After ...dxe4, ...Bb4+ and the queen grabs on d4 and e4, White's b4 bishop and fast development give compensation against Black's uncastled king.
What should Black play next?
The engine's first choice is dxe4, with Bb4 and h6 close behind. 4...dxe4 takes the challenge and leads to the forcing line where Black wins a pawn but must handle weak dark squares.
Related lines
Updated October 2026. Sources and method.