ECO C00 · French Defense

French Defense: Diemer-Duhm Gambit

1. e4 e6 2. d4 d5 3. c4

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Black to move. The arrow shows Stockfish’s best move.
Best move

3… dxe4−0.64

Black is slightly better. Stockfish 18, depth 18.

Analyze this position

In the French Defense: Diemer-Duhm Gambit (C00), reached after 1. e4 e6 2. d4 d5 3. c4, Stockfish 18 recommends 3… dxe4 for Black. Black is slightly better (−0.64).

Top engine moves

  1. −0.643… dxe4 4. Nc3 f5 5. Be2 Nc6 6. Be3 Nf6 7. Nh3 Be7 8. d5
  2. −0.153… Nc6 4. cxd5 exd5 5. e5 f6 6. Nf3 fxe5 7. Nxe5 Nxe5 8. dxe5
  3. +0.023… Bb4+ 4. Bd2 Bxd2+ 5. Nxd2 Ne7 6. Qc2 O-O 7. Ngf3 Nbc6 8. Rd1

Frequently asked questions

What is the best move in the French Defense: Diemer-Duhm Gambit?
After 1. e4 e6 2. d4 d5 3. c4, Stockfish 18 at depth 18 recommends 3… dxe4 for Black, continuing 4. Nc3 f5 5. Be2 Nc6 6. Be3 Nf6 7. Nh3 Be7 8. d5. Black is slightly better (−0.64). The next best moves are 3… Nc6 (−0.15) and 3… Bb4+ (+0.02).
Is the French Defense: Diemer-Duhm Gambit a good opening?
Stockfish rates the position at −0.64: black is slightly better. Evaluations this early in the game are small, so practical results depend far more on knowing the plans and typical structures than on the engine's number.
What is the ECO code of the French Defense: Diemer-Duhm Gambit?
C00. ECO codes classify chess openings from A00 to E99; C is the volume for open games and the French Defense.

Opening names from the Lichess opening book (CC0). Pieces by Colin M.L. Burnett (GPLv2+).