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French Defense: Diemer-Duhm Gambit

119K games from Lichess · Updated January 2026

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Analyze this line move by move

White expected score · All ratings · All speeds

52.1%

45%60%
Floor51.8%

the worst score you would still get, 90% confident. At best 52.3%.

Measured over 119K games at this level and clock.

Playablewins about as often as it loses at this level

A strong choice for White at this level and clock.

Outcomes for White

Draw 3.3 · Score = win + ½ of the draws · 119K games

Rank among the families White can choose here
not ranked — this is a variation, not a family
Games in this context
119K
Best context
55.7% at 2200-2499 Blitz
Worst context
46.1% at 0-999 Rapid
Average game length
31 moves
Games that end decisively
96.7%
Draws
3.3%

Best and worst are the strongest and weakest squares with at least 500 games behind them. The table further down shows every square, including thinner ones.

Extra Analysis

Deep-dive datasets for this opening

Gambit BreakpointWhite

Peak: +5.7% · Breakpoint: 0-999

Where it holds · White score by rating × clock

Green is clearly ahead for White, grey is around even, red is behind. Tap a cell to measure there, and again to clear. It gets better as the rating rises: 47.2% at 0-999, 64.8% at 2500+.

RatingUBBulleBlitzRapidClass
0-999
1000-1199
1200-1399
1400-1599
1600-1799
1800-1999
2000-2199
2200-2499—
2500+———

Expected score matrix by rating bracket and time control

  • 0-999 rating, UltraBullet: 46.7% expected score (58 games)
  • 0-999 rating, Bullet: 48.5% expected score (2,130 games)
  • 0-999 rating, Blitz: 48.9% expected score (3,822 games)
  • 0-999 rating, Rapid: 46.1% expected score (1,567 games)
  • 0-999 rating, Classical: 46.0% expected score (11 games)
  • 1000-1199 rating, UltraBullet: 46.2% expected score (102 games)
  • 1000-1199 rating, Bullet: 51.6% expected score (3,936 games)
  • 1000-1199 rating, Blitz: 50.8% expected score (5,663 games)
  • 1000-1199 rating, Rapid: 47.6% expected score (1,987 games)
  • 1000-1199 rating, Classical: 47.9% expected score (46 games)
  • 1200-1399 rating, UltraBullet: 47.7% expected score (193 games)
  • 1200-1399 rating, Bullet: 53.0% expected score (5,699 games)
  • 1200-1399 rating, Blitz: 51.0% expected score (7,896 games)
  • 1200-1399 rating, Rapid: 50.0% expected score (2,862 games)
  • 1200-1399 rating, Classical: 46.8% expected score (91 games)
  • 1400-1599 rating, UltraBullet: 43.9% expected score (307 games)
  • 1400-1599 rating, Bullet: 51.9% expected score (7,532 games)
  • 1400-1599 rating, Blitz: 51.8% expected score (9,954 games)
  • 1400-1599 rating, Rapid: 49.7% expected score (3,287 games)
  • 1400-1599 rating, Classical: 41.2% expected score (173 games)
  • 1600-1799 rating, UltraBullet: 46.9% expected score (189 games)
  • 1600-1799 rating, Bullet: 53.1% expected score (8,626 games)
  • 1600-1799 rating, Blitz: 53.6% expected score (10,539 games)
  • 1600-1799 rating, Rapid: 50.3% expected score (3,238 games)
  • 1600-1799 rating, Classical: 48.5% expected score (98 games)
  • 1800-1999 rating, UltraBullet: 51.3% expected score (37 games)
  • 1800-1999 rating, Bullet: 52.8% expected score (10,038 games)
  • 1800-1999 rating, Blitz: 54.0% expected score (8,652 games)
  • 1800-1999 rating, Rapid: 54.1% expected score (1,890 games)
  • 1800-1999 rating, Classical: 55.9% expected score (67 games)
  • 2000-2199 rating, UltraBullet: 51.8% expected score (26 games)
  • 2000-2199 rating, Bullet: 53.0% expected score (7,529 games)
  • 2000-2199 rating, Blitz: 54.9% expected score (4,273 games)
  • 2000-2199 rating, Rapid: 52.8% expected score (652 games)
  • 2000-2199 rating, Classical: 61.2% expected score (3 games)
  • 2200-2499 rating, UltraBullet: 50.0% expected score (14 games)
  • 2200-2499 rating, Bullet: 53.6% expected score (4,864 games)
  • 2200-2499 rating, Blitz: 55.7% expected score (940 games)
  • 2200-2499 rating, Rapid: 49.3% expected score (65 games)
  • 2500+ rating, Bullet: 51.1% expected score (337 games)
  • 2500+ rating, Blitz: 78.6% expected score (2 games)

Related Openings

Parent
French Defense
45.7%
Variations (5)
French Defense: Knight Variation
48.3%
French Defense: Exchange Variation
47.7%
French Defense: Normal Variation
50.3%
French Defense: Advance Variation
48.0%
French Defense: Queen's Knight
48.5%
Analyze French Defense: Diemer-Duhm Gambit PositionsSee what each move is worth at your rating, move by move

Methodology

Across every rating and clock, the French Defense: Diemer-Duhm Gambit scores 52.1% for White — we are 90% confident the real figure is between 51.8% and 52.3% — from 119K Lichess games. Win rate, draw rate and loss rate come from games played December 2023 to November 2025.

How the figures are made
Whose games these are
119K+ rated games played on Lichess (2023-12 to 2025-11). The games are Lichess’s and free for anyone to use. What is ours is the reading of them. Last rebuilt January 2026.
Which games we count
  • Rated games only — nothing casual.
  • Both players within 200 rating points of each other. A mismatch tells you about the gap, not about the opening.
  • At least 2 moves played.
  • A game is filed under White’s rating.
Why every number comes with a range
A number off a few hundred games is a guess. The same number off millions is a fact. The range is what tells them apart, and it is what the lists rank on — so an opening cannot reach the top on a lucky run of forty games. The more games behind a figure, the narrower its range.
How much we need before we say anything
An opening page needs 100 games. A gambit needs 50 games at a rating before we will say whether it pays there. The chaos and trap lists need 500 games overall and 250 games at one rating or clock.

Frequently Asked Questions

What is the French Defense: Diemer-Duhm Gambit win rate?

Playing the French Defense: Diemer-Duhm Gambit, White wins 50.4%, draws 3.3% and loses 46.3%. Counting a draw as half a point, that is an Expected Score of 52.1%. It rests on 119K rated games from Lichess.

At what rating does the French Defense: Diemer-Duhm Gambit perform best?

The French Defense: Diemer-Duhm Gambit performs best for White at 1800-1999, with an Expected Score of 53.4% (21K games) and the highest Floor of any rating with enough games to read.

Is the French Defense: Diemer-Duhm Gambit better in blitz or rapid?

For White, the French Defense: Diemer-Duhm Gambit scores higher in Blitz: an Expected Score of 52.4% in Blitz (52K games) against 49.9% in Rapid (16K games).

How sharp is the French Defense: Diemer-Duhm Gambit?

The French Defense: Diemer-Duhm Gambit has a sharpness score of 96.7 (very decisive), meaning 96.7% of games end decisively. Average game length is 31 moves.

What is the French Defense: Diemer-Duhm Gambit win rate at 0-999?

At 0-999, White wins 46.4%, draws 3.6% and loses 50.0%. Counting a draw as half a point, that is an Expected Score of 48.2%. It rests on 7.6K Lichess games, which average 26 moves.

What is the French Defense: Diemer-Duhm Gambit win rate at 1000-1199?

At 1000-1199, White wins 49.0%, draws 2.9% and loses 48.1%. Counting a draw as half a point, that is an Expected Score of 50.5%. It rests on 12K Lichess games, which average 28 moves.

What is the French Defense: Diemer-Duhm Gambit win rate at 1200-1399?

At 1200-1399, White wins 50.0%, draws 2.8% and loses 47.2%. Counting a draw as half a point, that is an Expected Score of 51.4%. It rests on 17K Lichess games, which average 29 moves.

What is the French Defense: Diemer-Duhm Gambit win rate at 1400-1599?

At 1400-1599, White wins 49.7%, draws 3.1% and loses 47.2%. Counting a draw as half a point, that is an Expected Score of 51.3%. It rests on 21K Lichess games, which average 31 moves.

What is the French Defense: Diemer-Duhm Gambit win rate at 1600-1799?

At 1600-1799, White wins 51.1%, draws 3.4% and loses 45.5%. Counting a draw as half a point, that is an Expected Score of 52.8%. It rests on 23K Lichess games, which average 32 moves.

What is the French Defense: Diemer-Duhm Gambit win rate at 1800-1999?

At 1800-1999, White wins 51.7%, draws 3.3% and loses 44.9%. Counting a draw as half a point, that is an Expected Score of 53.4%. It rests on 21K Lichess games, which average 33 moves.

What is the French Defense: Diemer-Duhm Gambit win rate at 2000-2199?

At 2000-2199, White wins 51.7%, draws 3.7% and loses 44.5%. Counting a draw as half a point, that is an Expected Score of 53.6%. It rests on 12K Lichess games, which average 34 moves.

What is the French Defense: Diemer-Duhm Gambit win rate at 2200-2499?

At 2200-2499, White wins 52.1%, draws 3.7% and loses 44.2%. Counting a draw as half a point, that is an Expected Score of 54.0%. It rests on 5.9K Lichess games, which average 36 moves.

What is the French Defense: Diemer-Duhm Gambit win rate at 2500+?

At 2500+, White wins 48.0%, draws 6.6% and loses 45.4%. Counting a draw as half a point, that is an Expected Score of 51.3%. It rests on 339 Lichess games, which average 38 moves.

What is the French Defense: Diemer-Duhm Gambit win rate in UltraBullet?

In UltraBullet, White wins 45.6%, draws 1.5% and loses 53.0%. Counting a draw as half a point, that is an Expected Score of 46.3%. It rests on 926 Lichess games.

What is the French Defense: Diemer-Duhm Gambit win rate in Bullet?

In Bullet, White wins 51.3%, draws 2.5% and loses 46.3%. Counting a draw as half a point, that is an Expected Score of 52.5%. It rests on 51K Lichess games.

What is the French Defense: Diemer-Duhm Gambit win rate in Blitz?

In Blitz, White wins 50.5%, draws 3.7% and loses 45.8%. Counting a draw as half a point, that is an Expected Score of 52.4%. It rests on 52K Lichess games.

What is the French Defense: Diemer-Duhm Gambit win rate in Rapid?

In Rapid, White wins 47.7%, draws 4.4% and loses 47.9%. Counting a draw as half a point, that is an Expected Score of 49.9%. It rests on 16K Lichess games.

What is the French Defense: Diemer-Duhm Gambit win rate in Classical?

In Classical, White wins 43.9%, draws 5.2% and loses 50.9%. Counting a draw as half a point, that is an Expected Score of 46.5%. It rests on 489 Lichess games.

Is the French Defense: Diemer-Duhm Gambit a good opening?

The French Defense: Diemer-Duhm Gambit is about level. Across all ratings, White wins 50.4% of its games and loses 46.3%. It performs best at 1800-1999. Your results depend on your rating, time control, and how well you know the typical plans.