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Blackmar-Diemer Gambit Declined: Brombacher Countergambit

39K games from Lichess · Updated January 2026

Playable
Black Expected Score50.4%Range (90% confident): 50.0% – 50.8%Based on 39K games
0%50.4%100%
Range (90% confident): 50.0% – 50.8%
Outcome Distribution
48.1%4.5%47.4%
Win
Draw
Loss
4...c5
Blackmar-Diemer Gambit Declined: Brombacher Countergambit
Analyzen=39K
Avg Length33 moves
Sharpness96%
Draw Rate4.5%

What is the Blackmar-Diemer Gambit Declined: Brombacher Countergambit expected score for Black?

Snapshot

At all ratings, the Blackmar-Diemer Gambit Declined: Brombacher Countergambit has a 50.4% expected score for Black (we're 90% confident it's between 50.0% and 50.8%), based on 39K Lichess games.

Extra Analysis

Deep-dive datasets for this opening

Gambit BreakpointBlack

Peak: +4.5% · Breakpoint: 1800-1999

Black Win% by Rating

Declines with rating: 55% → 42%

0
1000
1200
1400
1600
1800
2000
2200
2500+

  • 0-999: 54.9% win rate (526 games)
  • 1000-1199: 51.1% win rate (963 games)
  • 1200-1399: 54.5% win rate (1,541 games)
  • 1400-1599: 51.5% win rate (2,645 games)
  • 1600-1799: 51.4% win rate (4,667 games)
  • 1800-1999: 48.5% win rate (8,632 games)
  • 2000-2199: 47.0% win rate (10,644 games)
  • 2200-2499: 45.3% win rate (7,918 games)
  • 2500+: 41.8% win rate (1,691 games)

Black Win% by Time Control

Best in Classical (51%), worst in UltraBullet (46%)

UltraBullet
Bullet
Blitz
Rapid
Classical

  • UltraBullet: 45.5% win rate (158 games)
  • Bullet: 48.4% win rate (15,963 games)
  • Blitz: 47.4% win rate (18,704 games)
  • Rapid: 50.2% win rate (4,242 games)
  • Classical: 50.5% win rate (160 games)

Black% by Rating × Time Control

Click any cell to filter. Green = above 50%, Red = below 50%.

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: 70.0% expected score (1 games)
  • 0-999 rating, Bullet: 55.5% expected score (146 games)
  • 0-999 rating, Blitz: 58.2% expected score (267 games)
  • 0-999 rating, Rapid: 53.6% expected score (110 games)
  • 0-999 rating, Classical: 50.0% expected score (2 games)
  • 1000-1199 rating, UltraBullet: 30.0% expected score (1 games)
  • 1000-1199 rating, Bullet: 49.7% expected score (276 games)
  • 1000-1199 rating, Blitz: 52.9% expected score (439 games)
  • 1000-1199 rating, Rapid: 57.0% expected score (243 games)
  • 1000-1199 rating, Classical: 50.0% expected score (4 games)
  • 1200-1399 rating, UltraBullet: 61.2% expected score (3 games)
  • 1200-1399 rating, Bullet: 54.7% expected score (497 games)
  • 1200-1399 rating, Blitz: 57.3% expected score (708 games)
  • 1200-1399 rating, Rapid: 55.9% expected score (323 games)
  • 1200-1399 rating, Classical: 50.0% expected score (10 games)
  • 1400-1599 rating, UltraBullet: 54.3% expected score (22 games)
  • 1400-1599 rating, Bullet: 54.7% expected score (850 games)
  • 1400-1599 rating, Blitz: 52.1% expected score (1,218 games)
  • 1400-1599 rating, Rapid: 52.8% expected score (527 games)
  • 1400-1599 rating, Classical: 53.4% expected score (28 games)
  • 1600-1799 rating, UltraBullet: 52.3% expected score (42 games)
  • 1600-1799 rating, Bullet: 52.9% expected score (1,566 games)
  • 1600-1799 rating, Blitz: 53.4% expected score (2,248 games)
  • 1600-1799 rating, Rapid: 50.8% expected score (775 games)
  • 1600-1799 rating, Classical: 58.0% expected score (36 games)
  • 1800-1999 rating, UltraBullet: 58.0% expected score (30 games)
  • 1800-1999 rating, Bullet: 50.9% expected score (2,756 games)
  • 1800-1999 rating, Blitz: 49.3% expected score (4,794 games)
  • 1800-1999 rating, Rapid: 56.5% expected score (1,009 games)
  • 1800-1999 rating, Classical: 60.1% expected score (43 games)
  • 2000-2199 rating, UltraBullet: 36.9% expected score (29 games)
  • 2000-2199 rating, Bullet: 49.9% expected score (3,936 games)
  • 2000-2199 rating, Blitz: 49.2% expected score (5,747 games)
  • 2000-2199 rating, Rapid: 52.3% expected score (899 games)
  • 2000-2199 rating, Classical: 45.7% expected score (33 games)
  • 2200-2499 rating, UltraBullet: 39.4% expected score (22 games)
  • 2200-2499 rating, Bullet: 48.5% expected score (4,614 games)
  • 2200-2499 rating, Blitz: 48.0% expected score (2,932 games)
  • 2200-2499 rating, Rapid: 41.4% expected score (346 games)
  • 2200-2499 rating, Classical: 40.9% expected score (4 games)
  • 2500+ rating, UltraBullet: 29.0% expected score (8 games)
  • 2500+ rating, Bullet: 45.9% expected score (1,322 games)
  • 2500+ rating, Blitz: 39.8% expected score (351 games)
  • 2500+ rating, Rapid: 41.3% expected score (10 games)

Related Openings

Variations (5)
Blackmar-Diemer Gambit Declined: Vienna Defense
49.4%
Blackmar-Diemer Gambit Declined: Weinsbach Defense
55.1%
Blackmar-Diemer Gambit Declined: O'Kelly Defense
53.2%
Blackmar-Diemer Gambit Declined: Lamb Defense
47.6%
Blackmar-Diemer Gambit Declined: Langeheinicke Defense
49.4%
Analyze Blackmar-Diemer Gambit Declined: Brombacher Countergambit PositionsGet move-by-move win rates with the TrueElo analyzer

Frequently Asked Questions

What is the Blackmar-Diemer Gambit Declined: Brombacher Countergambit win rate?

The Blackmar-Diemer Gambit Declined: Brombacher Countergambit has a 47.4% (90% CI: 47.0%-47.8%) win rate for white, based on 39K rated games from Lichess.

At what rating does the Blackmar-Diemer Gambit Declined: Brombacher Countergambit perform best?

The Blackmar-Diemer Gambit Declined: Brombacher Countergambit performs best at 2500+ Elo with a 52.9% win rate for white (1.7K games). Win rate tends to decline at higher ratings as opponents know the theory better.

Is the Blackmar-Diemer Gambit Declined: Brombacher Countergambit better in blitz or rapid?

Bullet (48.2%) outperforms Classical (42.4%) by 5.8%. Choose your time control wisely.

How sharp is the Blackmar-Diemer Gambit Declined: Brombacher Countergambit?

The Blackmar-Diemer Gambit Declined: Brombacher Countergambit has a sharpness score of 95.5 (very decisive), meaning 95.5% of games end decisively. Average game length is 33 moves.

What is the Blackmar-Diemer Gambit Declined: Brombacher Countergambit win rate at 0-999 Elo?

At 0-999 Elo, the Blackmar-Diemer Gambit Declined: Brombacher Countergambit has a 41.8% (90% CI: 38.3%-45.3%) win rate for white, based on 526 Lichess games. Average game length is 27 moves with a 3.3% draw rate.

What is the Blackmar-Diemer Gambit Declined: Brombacher Countergambit win rate at 1000-1199 Elo?

At 1000-1199 Elo, the Blackmar-Diemer Gambit Declined: Brombacher Countergambit has a 45.3% (90% CI: 42.6%-47.9%) win rate for white, based on 963 Lichess games. Average game length is 28 moves with a 3.7% draw rate.

What is the Blackmar-Diemer Gambit Declined: Brombacher Countergambit win rate at 1200-1399 Elo?

At 1200-1399 Elo, the Blackmar-Diemer Gambit Declined: Brombacher Countergambit has a 42.3% (90% CI: 40.2%-44.4%) win rate for white, based on 1.5K Lichess games. Average game length is 29 moves with a 3.2% draw rate.

What is the Blackmar-Diemer Gambit Declined: Brombacher Countergambit win rate at 1400-1599 Elo?

At 1400-1599 Elo, the Blackmar-Diemer Gambit Declined: Brombacher Countergambit has a 45.4% (90% CI: 43.8%-47.0%) win rate for white, based on 2.6K Lichess games. Average game length is 29 moves with a 3.1% draw rate.

What is the Blackmar-Diemer Gambit Declined: Brombacher Countergambit win rate at 1600-1799 Elo?

At 1600-1799 Elo, the Blackmar-Diemer Gambit Declined: Brombacher Countergambit has a 45.8% (90% CI: 44.6%-47.0%) win rate for white, based on 4.7K Lichess games. Average game length is 30 moves with a 2.8% draw rate.

What is the Blackmar-Diemer Gambit Declined: Brombacher Countergambit win rate at 1800-1999 Elo?

At 1800-1999 Elo, the Blackmar-Diemer Gambit Declined: Brombacher Countergambit has a 47.1% (90% CI: 46.2%-48.0%) win rate for white, based on 8.6K Lichess games. Average game length is 32 moves with a 4.4% draw rate.

What is the Blackmar-Diemer Gambit Declined: Brombacher Countergambit win rate at 2000-2199 Elo?

At 2000-2199 Elo, the Blackmar-Diemer Gambit Declined: Brombacher Countergambit has a 47.7% (90% CI: 46.9%-48.5%) win rate for white, based on 11K Lichess games. Average game length is 34 moves with a 5.2% draw rate.

What is the Blackmar-Diemer Gambit Declined: Brombacher Countergambit win rate at 2200-2499 Elo?

At 2200-2499 Elo, the Blackmar-Diemer Gambit Declined: Brombacher Countergambit has a 49.4% (90% CI: 48.5%-50.3%) win rate for white, based on 7.9K Lichess games. Average game length is 35 moves with a 5.3% draw rate.

What is the Blackmar-Diemer Gambit Declined: Brombacher Countergambit win rate at 2500+ Elo?

At 2500+ Elo, the Blackmar-Diemer Gambit Declined: Brombacher Countergambit has a 52.9% (90% CI: 50.9%-54.8%) win rate for white, based on 1.7K Lichess games. Average game length is 39 moves with a 5.3% draw rate.

What is the Blackmar-Diemer Gambit Declined: Brombacher Countergambit win rate in UltraBullet?

In UltraBullet games, the Blackmar-Diemer Gambit Declined: Brombacher Countergambit has a 49.8% (90% CI: 43.3%-56.3%) win rate for white (158 Lichess games). Draw rate is 4.7%.

What is the Blackmar-Diemer Gambit Declined: Brombacher Countergambit win rate in Bullet?

In Bullet games, the Blackmar-Diemer Gambit Declined: Brombacher Countergambit has a 48.2% (90% CI: 47.6%-48.9%) win rate for white (16K Lichess games). Draw rate is 3.4%.

What is the Blackmar-Diemer Gambit Declined: Brombacher Countergambit win rate in Blitz?

In Blitz games, the Blackmar-Diemer Gambit Declined: Brombacher Countergambit has a 47.3% (90% CI: 46.7%-47.9%) win rate for white (19K Lichess games). Draw rate is 5.3%.

What is the Blackmar-Diemer Gambit Declined: Brombacher Countergambit win rate in Rapid?

In Rapid games, the Blackmar-Diemer Gambit Declined: Brombacher Countergambit has a 44.8% (90% CI: 43.5%-46.0%) win rate for white (4.2K Lichess games). Draw rate is 5.1%.

What is the Blackmar-Diemer Gambit Declined: Brombacher Countergambit win rate in Classical?

In Classical games, the Blackmar-Diemer Gambit Declined: Brombacher Countergambit has a 42.4% (90% CI: 36.1%-48.8%) win rate for white (160 Lichess games). Draw rate is 7.1%.

Is the Blackmar-Diemer Gambit Declined: Brombacher Countergambit a good opening?

The Blackmar-Diemer Gambit Declined: Brombacher Countergambit is statistically balanced with a 47.4% (90% CI: 47.0%-47.8%) win rate across all ratings. It performs best at 2500+ Elo. Your results depend on your rating, time control, and how well you know the typical plans.