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Slav Defense: Diemer Gambit

267K games from Lichess · Updated January 2026

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Analyze this line move by move

White expected score · All ratings · All speeds

50.0%

45%55%
Floor49.8%

the worst score you would still get, 90% confident. At best 50.1%.

Measured over 267K games at this level and clock.

Playablewins about as often as it loses at this level

Roughly even — the middlegame decides more than this opening choice does.

Outcomes for White

Draw 3.5 · Score = win + ½ of the draws · 267K games

Rank among the families White can choose here
not ranked — this is a variation, not a family
Games in this context
267K
Best context
53.9% at 2200-2499 Bullet
Worst context
44.9% at 0-999 Rapid
Average game length
33 moves
Games that end decisively
96.5%
Draws
3.5%

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: 46.1% at 0-999, 53.8% 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: 41.6% expected score (46 games)
  • 0-999 rating, Bullet: 46.3% expected score (3,020 games)
  • 0-999 rating, Blitz: 47.6% expected score (5,198 games)
  • 0-999 rating, Rapid: 44.9% expected score (2,167 games)
  • 0-999 rating, Classical: 50.0% expected score (15 games)
  • 1000-1199 rating, UltraBullet: 49.0% expected score (97 games)
  • 1000-1199 rating, Bullet: 49.8% expected score (5,107 games)
  • 1000-1199 rating, Blitz: 48.7% expected score (8,041 games)
  • 1000-1199 rating, Rapid: 47.5% expected score (3,347 games)
  • 1000-1199 rating, Classical: 42.1% expected score (55 games)
  • 1200-1399 rating, UltraBullet: 43.6% expected score (162 games)
  • 1200-1399 rating, Bullet: 50.4% expected score (7,590 games)
  • 1200-1399 rating, Blitz: 48.3% expected score (11,272 games)
  • 1200-1399 rating, Rapid: 47.4% expected score (4,989 games)
  • 1200-1399 rating, Classical: 48.2% expected score (167 games)
  • 1400-1599 rating, UltraBullet: 46.4% expected score (261 games)
  • 1400-1599 rating, Bullet: 50.0% expected score (10,391 games)
  • 1400-1599 rating, Blitz: 48.7% expected score (14,634 games)
  • 1400-1599 rating, Rapid: 48.2% expected score (5,354 games)
  • 1400-1599 rating, Classical: 42.8% expected score (318 games)
  • 1600-1799 rating, UltraBullet: 47.8% expected score (221 games)
  • 1600-1799 rating, Bullet: 50.8% expected score (15,322 games)
  • 1600-1799 rating, Blitz: 49.2% expected score (20,944 games)
  • 1600-1799 rating, Rapid: 49.0% expected score (5,845 games)
  • 1600-1799 rating, Classical: 48.1% expected score (258 games)
  • 1800-1999 rating, UltraBullet: 55.5% expected score (71 games)
  • 1800-1999 rating, Bullet: 50.9% expected score (24,860 games)
  • 1800-1999 rating, Blitz: 49.3% expected score (28,321 games)
  • 1800-1999 rating, Rapid: 48.3% expected score (5,667 games)
  • 1800-1999 rating, Classical: 44.8% expected score (267 games)
  • 2000-2199 rating, UltraBullet: 43.6% expected score (53 games)
  • 2000-2199 rating, Bullet: 51.1% expected score (23,325 games)
  • 2000-2199 rating, Blitz: 49.8% expected score (23,693 games)
  • 2000-2199 rating, Rapid: 49.8% expected score (3,107 games)
  • 2000-2199 rating, Classical: 47.4% expected score (56 games)
  • 2200-2499 rating, UltraBullet: 50.0% expected score (25 games)
  • 2200-2499 rating, Bullet: 53.9% expected score (21,319 games)
  • 2200-2499 rating, Blitz: 52.3% expected score (9,017 games)
  • 2200-2499 rating, Rapid: 49.3% expected score (568 games)
  • 2500+ rating, Bullet: 52.0% expected score (1,422 games)
  • 2500+ rating, Blitz: 51.6% expected score (64 games)
  • 2500+ rating, Rapid: 57.7% expected score (5 games)

Related Openings

Parent
Slav Defense
50.8%
Variations (5)
Slav Defense: Exchange Variation
50.4%
Slav Defense: Three Knights Variation
51.1%
Slav Defense: Modern Line
51.9%
Slav Defense: Quiet Variation, Pin Defense
49.6%
Slav Defense: Slav Gambit, Alekhine Attack
52.8%
Analyze Slav Defense: Diemer Gambit PositionsSee what each move is worth at your rating, move by move

Methodology

Across every rating and clock, the Slav Defense: Diemer Gambit scores 50.0% for White — we are 90% confident the real figure is between 49.8% and 50.1% — from 267K 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
267K+ 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 Slav Defense: Diemer Gambit win rate?

Playing the Slav Defense: Diemer Gambit, White wins 48.2%, draws 3.5% and loses 48.3%. Counting a draw as half a point, that is an Expected Score of 50.0%. It rests on 267K rated games from Lichess.

At what rating does the Slav Defense: Diemer Gambit perform best?

The Slav Defense: Diemer Gambit performs best for White at 2200-2499, with an Expected Score of 53.3% (31K games) and the highest Floor of any rating with enough games to read.

Is the Slav Defense: Diemer Gambit better in blitz or rapid?

For White, the Slav Defense: Diemer Gambit scores higher in Blitz: an Expected Score of 49.3% in Blitz (121K games) against 48.1% in Rapid (31K games).

How sharp is the Slav Defense: Diemer Gambit?

The Slav Defense: Diemer Gambit has a sharpness score of 96.5 (very decisive), meaning 96.5% of games end decisively. Average game length is 33 moves.

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

At 0-999, White wins 44.9%, draws 3.3% and loses 51.7%. Counting a draw as half a point, that is an Expected Score of 46.6%. It rests on 10K Lichess games, which average 26 moves.

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

At 1000-1199, White wins 47.2%, draws 3.0% and loses 49.8%. Counting a draw as half a point, that is an Expected Score of 48.7%. It rests on 17K Lichess games, which average 28 moves.

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

At 1200-1399, White wins 47.3%, draws 2.9% and loses 49.9%. Counting a draw as half a point, that is an Expected Score of 48.7%. It rests on 24K Lichess games, which average 30 moves.

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

At 1400-1599, White wins 47.5%, draws 2.9% and loses 49.6%. Counting a draw as half a point, that is an Expected Score of 49.0%. It rests on 31K Lichess games, which average 30 moves.

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

At 1600-1799, White wins 48.2%, draws 3.0% and loses 48.8%. Counting a draw as half a point, that is an Expected Score of 49.7%. It rests on 43K Lichess games, which average 32 moves.

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

At 1800-1999, White wins 48.1%, draws 3.4% and loses 48.5%. Counting a draw as half a point, that is an Expected Score of 49.8%. It rests on 59K Lichess games, which average 34 moves.

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

At 2000-2199, White wins 48.3%, draws 4.2% and loses 47.5%. Counting a draw as half a point, that is an Expected Score of 50.4%. It rests on 50K Lichess games, which average 36 moves.

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

At 2200-2499, White wins 51.0%, draws 4.6% and loses 44.4%. Counting a draw as half a point, that is an Expected Score of 53.3%. It rests on 31K Lichess games, which average 37 moves.

What is the Slav Defense: Diemer Gambit win rate at 2500+?

At 2500+, White wins 49.9%, draws 4.2% and loses 45.9%. Counting a draw as half a point, that is an Expected Score of 52.0%. It rests on 1.5K Lichess games, which average 39 moves.

What is the Slav Defense: Diemer Gambit win rate in UltraBullet?

In UltraBullet, White wins 46.1%, draws 1.4% and loses 52.4%. Counting a draw as half a point, that is an Expected Score of 46.9%. It rests on 936 Lichess games.

What is the Slav Defense: Diemer Gambit win rate in Bullet?

In Bullet, White wins 49.8%, draws 2.7% and loses 47.5%. Counting a draw as half a point, that is an Expected Score of 51.2%. It rests on 112K Lichess games.

What is the Slav Defense: Diemer Gambit win rate in Blitz?

In Blitz, White wins 47.3%, draws 4.0% and loses 48.7%. Counting a draw as half a point, that is an Expected Score of 49.3%. It rests on 121K Lichess games.

What is the Slav Defense: Diemer Gambit win rate in Rapid?

In Rapid, White wins 46.0%, draws 4.2% and loses 49.8%. Counting a draw as half a point, that is an Expected Score of 48.1%. It rests on 31K Lichess games.

What is the Slav Defense: Diemer Gambit win rate in Classical?

In Classical, White wins 42.9%, draws 5.1% and loses 51.9%. Counting a draw as half a point, that is an Expected Score of 45.5%. It rests on 1.1K Lichess games.

Is the Slav Defense: Diemer Gambit a good opening?

The Slav Defense: Diemer Gambit is about level. Across all ratings, White wins 48.2% of its games and loses 48.3%. It performs best at 2200-2499. Your results depend on your rating, time control, and how well you know the typical plans.