TrueEloPlay what wins.
Analyzer

Blackmar-Diemer Gambit Accepted: Gunderam Defense

92K games from Lichess · Updated January 2026

Playable
Black Expected Score51.4%Range (90% confident): 51.1% – 51.7%Based on 92K games
0%51.4%100%
Range (90% confident): 51.1% – 51.7%
Outcome Distribution
49.5%3.7%46.8%
Win
Draw
Loss
5...Bf5
Blackmar-Diemer Gambit Accepted: Gunderam Defense
Analyzen=92K
Avg Length31 moves
Sharpness96%
Draw Rate3.7%

What is the Blackmar-Diemer Gambit Accepted: Gunderam Defense expected score for Black?

Snapshot

At all ratings, the Blackmar-Diemer Gambit Accepted: Gunderam Defense has a 51.4% expected score for Black (we're 90% confident it's between 51.1% and 51.7%), based on 92K Lichess games.

Black Win% by Rating

Declines with rating: 48% → 44%

0
1000
1200
1400
1600
1800
2000
2200
2500+

  • 0-999: 47.6% win rate (2,070 games)
  • 1000-1199: 47.0% win rate (4,971 games)
  • 1200-1399: 48.9% win rate (9,223 games)
  • 1400-1599: 49.8% win rate (15,266 games)
  • 1600-1799: 50.0% win rate (18,834 games)
  • 1800-1999: 50.7% win rate (19,778 games)
  • 2000-2199: 49.6% win rate (13,372 games)
  • 2200-2499: 48.2% win rate (7,625 games)
  • 2500+: 44.2% win rate (1,201 games)

Black Win% by Time Control

Best in UltraBullet (55%), worst in Bullet (49%)

UltraBullet
Bullet
Blitz
Rapid
Classical

  • UltraBullet: 54.8% win rate (76 games)
  • Bullet: 49.1% win rate (28,467 games)
  • Blitz: 49.8% win rate (44,814 games)
  • Rapid: 49.3% win rate (18,392 games)
  • Classical: 52.1% win rate (591 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, Bullet: 49.5% expected score (596 games)
  • 0-999 rating, Blitz: 48.2% expected score (1,085 games)
  • 0-999 rating, Rapid: 50.3% expected score (388 games)
  • 0-999 rating, Classical: 70.0% expected score (1 games)
  • 1000-1199 rating, UltraBullet: 68.2% expected score (4 games)
  • 1000-1199 rating, Bullet: 49.9% expected score (1,312 games)
  • 1000-1199 rating, Blitz: 48.2% expected score (2,495 games)
  • 1000-1199 rating, Rapid: 47.3% expected score (1,155 games)
  • 1000-1199 rating, Classical: 57.7% expected score (5 games)
  • 1200-1399 rating, UltraBullet: 38.9% expected score (3 games)
  • 1200-1399 rating, Bullet: 50.1% expected score (2,362 games)
  • 1200-1399 rating, Blitz: 51.4% expected score (4,631 games)
  • 1200-1399 rating, Rapid: 48.6% expected score (2,206 games)
  • 1200-1399 rating, Classical: 56.7% expected score (21 games)
  • 1400-1599 rating, UltraBullet: 50.0% expected score (8 games)
  • 1400-1599 rating, Bullet: 50.6% expected score (3,332 games)
  • 1400-1599 rating, Blitz: 52.1% expected score (7,883 games)
  • 1400-1599 rating, Rapid: 50.2% expected score (3,948 games)
  • 1400-1599 rating, Classical: 56.8% expected score (95 games)
  • 1600-1799 rating, UltraBullet: 50.0% expected score (30 games)
  • 1600-1799 rating, Bullet: 51.6% expected score (4,602 games)
  • 1600-1799 rating, Blitz: 51.7% expected score (9,107 games)
  • 1600-1799 rating, Rapid: 51.9% expected score (4,870 games)
  • 1600-1799 rating, Classical: 58.9% expected score (225 games)
  • 1800-1999 rating, UltraBullet: 61.2% expected score (12 games)
  • 1800-1999 rating, Bullet: 51.3% expected score (5,346 games)
  • 1800-1999 rating, Blitz: 53.1% expected score (10,258 games)
  • 1800-1999 rating, Rapid: 53.5% expected score (3,991 games)
  • 1800-1999 rating, Classical: 50.6% expected score (171 games)
  • 2000-2199 rating, UltraBullet: 62.2% expected score (19 games)
  • 2000-2199 rating, Bullet: 50.3% expected score (5,337 games)
  • 2000-2199 rating, Blitz: 52.4% expected score (6,470 games)
  • 2000-2199 rating, Rapid: 54.7% expected score (1,475 games)
  • 2000-2199 rating, Classical: 56.2% expected score (71 games)
  • 2200-2499 rating, Bullet: 50.3% expected score (4,665 games)
  • 2200-2499 rating, Blitz: 51.4% expected score (2,602 games)
  • 2200-2499 rating, Rapid: 52.4% expected score (356 games)
  • 2200-2499 rating, Classical: 50.0% expected score (2 games)
  • 2500+ rating, Bullet: 49.4% expected score (915 games)
  • 2500+ rating, Blitz: 39.8% expected score (283 games)
  • 2500+ rating, Rapid: 50.0% expected score (3 games)

Related Openings

Parent
Blackmar-Diemer Gambit Accepted
50.9%
Variations (5)
Blackmar-Diemer Gambit Accepted: Ryder Gambit
54.2%
Blackmar-Diemer Gambit Accepted: Teichmann Defense
53.2%
Blackmar-Diemer Gambit Accepted: Euwe Defense
58.8%
Blackmar-Diemer Gambit Accepted: Ziegler Defense
55.2%
Blackmar-Diemer Gambit Accepted: Pietrowsky Defense
53.4%
Continuations (1)
Blackmar-Diemer Gambit Accepted: Gunderam Defense, Stader Variation
47.6%
Analyze Blackmar-Diemer Gambit Accepted: Gunderam Defense PositionsGet move-by-move win rates with the TrueElo analyzer

Frequently Asked Questions

What is the Blackmar-Diemer Gambit Accepted: Gunderam Defense win rate?

The Blackmar-Diemer Gambit Accepted: Gunderam Defense has a 46.8% (90% CI: 46.5%-47.1%) win rate for white, based on 92K rated games from Lichess.

At what rating does the Blackmar-Diemer Gambit Accepted: Gunderam Defense perform best?

The Blackmar-Diemer Gambit Accepted: Gunderam Defense performs best at 1000-1199 Elo with a 50.1% win rate for white (5.0K games). Win rate tends to decline at higher ratings as opponents know the theory better.

Is the Blackmar-Diemer Gambit Accepted: Gunderam Defense better in blitz or rapid?

Bullet (47.9%) outperforms UltraBullet (43.2%) by 4.7%. Choose your time control wisely.

How sharp is the Blackmar-Diemer Gambit Accepted: Gunderam Defense?

The Blackmar-Diemer Gambit Accepted: Gunderam Defense has a sharpness score of 96.3 (very decisive), meaning 96.3% of games end decisively. Average game length is 31 moves.

What is the Blackmar-Diemer Gambit Accepted: Gunderam Defense win rate at 0-999 Elo?

At 0-999 Elo, the Blackmar-Diemer Gambit Accepted: Gunderam Defense has a 49.7% (90% CI: 47.8%-51.5%) win rate for white, based on 2.1K Lichess games. Average game length is 25 moves with a 2.7% draw rate.

What is the Blackmar-Diemer Gambit Accepted: Gunderam Defense win rate at 1000-1199 Elo?

At 1000-1199 Elo, the Blackmar-Diemer Gambit Accepted: Gunderam Defense has a 50.1% (90% CI: 48.9%-51.3%) win rate for white, based on 5.0K Lichess games. Average game length is 27 moves with a 2.9% draw rate.

What is the Blackmar-Diemer Gambit Accepted: Gunderam Defense win rate at 1200-1399 Elo?

At 1200-1399 Elo, the Blackmar-Diemer Gambit Accepted: Gunderam Defense has a 48.2% (90% CI: 47.3%-49.0%) win rate for white, based on 9.2K Lichess games. Average game length is 28 moves with a 3.0% draw rate.

What is the Blackmar-Diemer Gambit Accepted: Gunderam Defense win rate at 1400-1599 Elo?

At 1400-1599 Elo, the Blackmar-Diemer Gambit Accepted: Gunderam Defense has a 47.3% (90% CI: 46.6%-48.0%) win rate for white, based on 15K Lichess games. Average game length is 29 moves with a 2.9% draw rate.

What is the Blackmar-Diemer Gambit Accepted: Gunderam Defense win rate at 1600-1799 Elo?

At 1600-1799 Elo, the Blackmar-Diemer Gambit Accepted: Gunderam Defense has a 46.4% (90% CI: 45.8%-47.0%) win rate for white, based on 19K Lichess games. Average game length is 31 moves with a 3.6% draw rate.

What is the Blackmar-Diemer Gambit Accepted: Gunderam Defense win rate at 1800-1999 Elo?

At 1800-1999 Elo, the Blackmar-Diemer Gambit Accepted: Gunderam Defense has a 45.4% (90% CI: 44.8%-46.0%) win rate for white, based on 20K Lichess games. Average game length is 32 moves with a 3.9% draw rate.

What is the Blackmar-Diemer Gambit Accepted: Gunderam Defense win rate at 2000-2199 Elo?

At 2000-2199 Elo, the Blackmar-Diemer Gambit Accepted: Gunderam Defense has a 46.0% (90% CI: 45.3%-46.7%) win rate for white, based on 13K Lichess games. Average game length is 33 moves with a 4.4% draw rate.

What is the Blackmar-Diemer Gambit Accepted: Gunderam Defense win rate at 2200-2499 Elo?

At 2200-2499 Elo, the Blackmar-Diemer Gambit Accepted: Gunderam Defense has a 46.8% (90% CI: 45.9%-47.7%) win rate for white, based on 7.6K Lichess games. Average game length is 35 moves with a 5.0% draw rate.

What is the Blackmar-Diemer Gambit Accepted: Gunderam Defense win rate at 2500+ Elo?

At 2500+ Elo, the Blackmar-Diemer Gambit Accepted: Gunderam Defense has a 50.0% (90% CI: 47.6%-52.4%) win rate for white, based on 1.2K Lichess games. Average game length is 38 moves with a 5.8% draw rate.

What is the Blackmar-Diemer Gambit Accepted: Gunderam Defense win rate in Bullet?

In Bullet games, the Blackmar-Diemer Gambit Accepted: Gunderam Defense has a 47.9% (90% CI: 47.4%-48.3%) win rate for white (28K Lichess games). Draw rate is 3.0%.

What is the Blackmar-Diemer Gambit Accepted: Gunderam Defense win rate in Blitz?

In Blitz games, the Blackmar-Diemer Gambit Accepted: Gunderam Defense has a 46.3% (90% CI: 46.0%-46.7%) win rate for white (45K Lichess games). Draw rate is 3.8%.

What is the Blackmar-Diemer Gambit Accepted: Gunderam Defense win rate in Rapid?

In Rapid games, the Blackmar-Diemer Gambit Accepted: Gunderam Defense has a 46.5% (90% CI: 45.9%-47.1%) win rate for white (18K Lichess games). Draw rate is 4.2%.

What is the Blackmar-Diemer Gambit Accepted: Gunderam Defense win rate in Classical?

In Classical games, the Blackmar-Diemer Gambit Accepted: Gunderam Defense has a 40.4% (90% CI: 37.1%-43.8%) win rate for white (591 Lichess games). Draw rate is 7.5%.

Is the Blackmar-Diemer Gambit Accepted: Gunderam Defense a good opening?

The Blackmar-Diemer Gambit Accepted: Gunderam Defense is statistically balanced with a 46.8% (90% CI: 46.5%-47.1%) win rate across all ratings. It performs best at 1000-1199 Elo. Your results depend on your rating, time control, and how well you know the typical plans.