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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 before we will say where it stops working. The chaos and trap lists need 500 games.

Frequently Asked Questions

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

The French Defense: Diemer-Duhm Gambit scores 52.1% (range, 90% confident: 51.8% – 52.3%) for White, based 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 at 1800-1999, where it scores 53.4% for White (21K games). It tends to score less at higher ratings as opponents know the theory better.

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

For White, Bullet (52.5%) outperforms Classical (46.5%). Choose your time control wisely.

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, the French Defense: Diemer-Duhm Gambit scores 48.2% (range, 90% confident: 47.3% – 49.1%) for White, based on 7.6K Lichess games. Average game length is 26 moves with a 3.6% draw rate.

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

At 1000-1199, the French Defense: Diemer-Duhm Gambit scores 50.5% (range, 90% confident: 49.7% – 51.2%) for White, based on 12K Lichess games. Average game length is 28 moves with a 2.9% draw rate.

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

At 1200-1399, the French Defense: Diemer-Duhm Gambit scores 51.4% (range, 90% confident: 50.8% – 52.1%) for White, based on 17K Lichess games. Average game length is 29 moves with a 2.8% draw rate.

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

At 1400-1599, the French Defense: Diemer-Duhm Gambit scores 51.3% (range, 90% confident: 50.7% – 51.8%) for White, based on 21K Lichess games. Average game length is 31 moves with a 3.1% draw rate.

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

At 1600-1799, the French Defense: Diemer-Duhm Gambit scores 52.8% (range, 90% confident: 52.3% – 53.4%) for White, based on 23K Lichess games. Average game length is 32 moves with a 3.4% draw rate.

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

At 1800-1999, the French Defense: Diemer-Duhm Gambit scores 53.4% (range, 90% confident: 52.9% – 54.0%) for White, based on 21K Lichess games. Average game length is 33 moves with a 3.3% draw rate.

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

At 2000-2199, the French Defense: Diemer-Duhm Gambit scores 53.6% (range, 90% confident: 52.9% – 54.4%) for White, based on 12K Lichess games. Average game length is 34 moves with a 3.7% draw rate.

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

At 2200-2499, the French Defense: Diemer-Duhm Gambit scores 54.0% (range, 90% confident: 52.9% – 55.0%) for White, based on 5.9K Lichess games. Average game length is 36 moves with a 3.7% draw rate.

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

At 2500+, the French Defense: Diemer-Duhm Gambit scores 51.3% (range, 90% confident: 46.9% – 55.8%) for White, based on 339 Lichess games. Average game length is 38 moves with a 6.6% draw rate.

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

In UltraBullet games, the French Defense: Diemer-Duhm Gambit scores 46.3% (range, 90% confident: 43.6% – 49.0%) for White (926 Lichess games). Draw rate is 1.5%.

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

In Bullet games, the French Defense: Diemer-Duhm Gambit scores 52.5% (range, 90% confident: 52.2% – 52.9%) for White (51K Lichess games). Draw rate is 2.5%.

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

In Blitz games, the French Defense: Diemer-Duhm Gambit scores 52.4% (range, 90% confident: 52.1% – 52.8%) for White (52K Lichess games). Draw rate is 3.7%.

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

In Rapid games, the French Defense: Diemer-Duhm Gambit scores 49.9% (range, 90% confident: 49.2% – 50.6%) for White (16K Lichess games). Draw rate is 4.4%.

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

In Classical games, the French Defense: Diemer-Duhm Gambit scores 46.5% (range, 90% confident: 42.9% – 50.2%) for White (489 Lichess games). Draw rate is 5.2%.

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

The French Defense: Diemer-Duhm Gambit is about level with a 50.4% (range, 90% confident: 50.2% – 50.6%) win rate across all ratings. It performs best at 1800-1999. Your results depend on your rating, time control, and how well you know the typical plans.