French Defense: Diemer-Duhm Gambit Accepted
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Statistics from Lichess
353,915 games: White 47.5% / Draw 4.1% / Black 48.3%
| Next move | Games | White / Draw / BlackW / D / B |
|---|---|---|
| 269,053269K | ||
| 46,59147K | ||
| 19,38319K | ||
| 4,7224,722 | ||
| 4,3254,325 | ||
| 1,8211,821 | ||
| 1,4121,412 | ||
| 972972 |
Rated Lichess games between players rated 1600 to 2500, from the Lichess opening explorer, updated Oct 20, 2026
Engine evaluation
−0.91 Black is better
Best play: 4. Nc3 f5 5. Be3 Nf6 6. f3 Nc6 7. fxe4 fxe4 8. Nh3 Bb4
Stockfish 19, depth 30, after the line's last move. Scores are in pawns, from White's side.
By rating
The stronger the players, the worse this line does for Black: Black scores 56% under 1400, 50% at 2200 and up (wins plus half the draws).
| Players | Games | White / Draw / BlackW / D / B |
|---|---|---|
| Under 1400 | 74K | |
| 1400–1799 | 152K | |
| 1800–2199 | 226K | |
| 2200 and up | 36K | |
| Masters, over the board | 10 |
Master games
- Orlov, P. – Kostic, V. G.
- Bjeljac, N. – Mihic, B.
- Lloyd, G. – Pommrich, R.
- Ianovsky, A. – Kosikov, A. I.
- Jedryczka, K. – Sieciechowicz, M.
Rated blitz, rapid and classical Lichess games by rating band, and over-the-board games of players rated 2200+ from the Lichess masters database, updated Sep 27, 2026
Overview
French Defense: Diemer-Duhm Gambit Accepted (ECO C00, Open Games) is a gambit in the French Defense: Diemer-Duhm Gambit, reached after 1. e4 e6 2. d4 d5 3. c4 dxe4 (3 moves).
In 353,915 rated Lichess games between players rated 1600 to 2500, White won 47.5%, Black 48.3% and 4.1% were drawn. White's most played move here is 4. Nc3, in 76% of those games.
Written from the Lichess opening list and explorer. Know this line well? Write about it.
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How to play against the French Defense: Diemer-Duhm Gambit Accepted
4. d5 scores best for White: 56.5%, with White winning 54.7% and Black 41.7% of 19K games. The most played answer, 4. Nc3, scores lowest: 49.3% in 269K games. Stockfish's first choice is 4. Nc3.
Main answers: those played in at least 5% of these games. Score: White's wins plus half the draws, in rated Lichess games between players rated 1600 to 2500. How to play against other popular openings
Popularity by year
The French Defense: Diemer-Duhm Gambit Accepted has stayed between 0.012% and 0.016% of Lichess games a year since 2016 (0.014% in 2025).
Numbers by year
| Year | Share of games | Games |
|---|---|---|
| 2016 | 0.016% | 5,668 |
| 2017 | 0.015% | 8,150 |
| 2018 | 0.016% | 12,426 |
| 2019 | 0.016% | 19,500 |
| 2020 | 0.014% | 39,623 |
| 2021 | 0.012% | 48,757 |
| 2022 | 0.013% | 48,605 |
| 2023 | 0.014% | 51,562 |
| 2024 | 0.014% | 49,642 |
| 2025 | 0.014% | 48,764 |
| 2026 (Jan–Apr) | 0.014% | 14,958 |
Share of rated Lichess games between players rated 1600 to 2500 (blitz, rapid and classical) that reach this position, by year; 2026: January to April. Which openings are rising and falling
Cite this page
Caissa Codex. “French Defense: Diemer-Duhm Gambit Accepted (C00)”. Lichess data as of 20 Oct 2026. https://chesscodex.org/openings/french-defense-diemer-duhm-gambit-accepted