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Blackmar-Diemer Gambit Accepted: Gunderam Defense, Stader Variation

1.1K games from Lichess · Updated January 2026

Playable
Black Expected Score50.8%Range (90% confident): 48.4% – 53.2%Based on 1.1K games
0%50.8%100%
Range (90% confident): 48.4% – 53.2%
Outcome Distribution
49.1%3.3%47.6%
Win
Draw
Loss
7...Be4
Blackmar-Diemer Gambit Accepted: Gunderam Defense, Stader Variation
Analyzen=1.1K
Avg Length29 moves
Sharpness97%
Draw Rate3.3%

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

Snapshot

At all ratings, the Blackmar-Diemer Gambit Accepted: Gunderam Defense, Stader Variation has a 50.8% expected score for Black (we're 90% confident it's between 48.4% and 53.2%), based on 1.1K Lichess games.

Extra Analysis

Deep-dive datasets for this opening

Traps & Chaos

Complexity: 93.2 · Trap factor: -6.2 · n=1.1K

Black Win% by Rating

Declines with rating: 54% → 49%

0
1000
1200
1400
1600
1800
2000
2200
2500+

  • 0-999: 53.8% win rate (5 games)
  • 1000-1199: 24.3% win rate (17 games)
  • 1200-1399: 42.9% win rate (58 games)
  • 1400-1599: 50.7% win rate (106 games)
  • 1600-1799: 51.8% win rate (183 games)
  • 1800-1999: 49.9% win rate (248 games)
  • 2000-2199: 50.3% win rate (242 games)
  • 2200-2499: 46.7% win rate (231 games)
  • 2500+: 49.4% win rate (42 games)

Black Win% by Time Control

Best in Classical (58%), worst in Rapid (45%)

Bullet
Blitz
Rapid
Classical

  • Bullet: 49.3% win rate (174 games)
  • Blitz: 50.2% win rate (723 games)
  • Rapid: 44.9% win rate (227 games)
  • Classical: 57.9% win rate (8 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: 78.6% expected score (2 games)
  • 0-999 rating, Blitz: 50.0% expected score (2 games)
  • 0-999 rating, Rapid: 30.0% expected score (1 games)
  • 1000-1199 rating, Bullet: 13.7% expected score (4 games)
  • 1000-1199 rating, Blitz: 38.0% expected score (11 games)
  • 1000-1199 rating, Rapid: 21.5% expected score (2 games)
  • 1200-1399 rating, Bullet: 54.0% expected score (11 games)
  • 1200-1399 rating, Blitz: 35.7% expected score (23 games)
  • 1200-1399 rating, Rapid: 50.0% expected score (24 games)
  • 1400-1599 rating, Bullet: 62.9% expected score (14 games)
  • 1400-1599 rating, Blitz: 50.0% expected score (55 games)
  • 1400-1599 rating, Rapid: 48.7% expected score (35 games)
  • 1400-1599 rating, Classical: 78.6% expected score (2 games)
  • 1600-1799 rating, Bullet: 61.5% expected score (16 games)
  • 1600-1799 rating, Blitz: 58.5% expected score (111 games)
  • 1600-1799 rating, Rapid: 36.3% expected score (53 games)
  • 1600-1799 rating, Classical: 38.9% expected score (3 games)
  • 1800-1999 rating, Bullet: 29.6% expected score (23 games)
  • 1800-1999 rating, Blitz: 54.5% expected score (155 games)
  • 1800-1999 rating, Rapid: 54.4% expected score (68 games)
  • 1800-1999 rating, Classical: 50.0% expected score (2 games)
  • 2000-2199 rating, Bullet: 40.9% expected score (26 games)
  • 2000-2199 rating, Blitz: 54.0% expected score (187 games)
  • 2000-2199 rating, Rapid: 46.7% expected score (28 games)
  • 2000-2199 rating, Classical: 70.0% expected score (1 games)
  • 2200-2499 rating, Bullet: 56.5% expected score (68 games)
  • 2200-2499 rating, Blitz: 45.0% expected score (149 games)
  • 2200-2499 rating, Rapid: 56.5% expected score (14 games)
  • 2500+ rating, Bullet: 50.0% expected score (10 games)
  • 2500+ rating, Blitz: 56.4% expected score (30 games)
  • 2500+ rating, Rapid: 50.0% expected score (2 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%
Analyze Blackmar-Diemer Gambit Accepted: Gunderam Defense, Stader Variation PositionsGet move-by-move win rates with the TrueElo analyzer

Frequently Asked Questions

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

The Blackmar-Diemer Gambit Accepted: Gunderam Defense, Stader Variation has a 47.6% (90% CI: 45.2%-50.0%) win rate for white, based on 1.1K rated games from Lichess.

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

The Blackmar-Diemer Gambit Accepted: Gunderam Defense, Stader Variation performs best at 2200-2499 Elo with a 48.4% win rate for white (231 games). Win rate tends to decline at higher ratings as opponents know the theory better.

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

Rapid (50.5%) outperforms Bullet (48.7%) by 1.8%. Choose your time control wisely.

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

The Blackmar-Diemer Gambit Accepted: Gunderam Defense, Stader Variation has a sharpness score of 96.7 (very decisive), meaning 96.7% of games end decisively. Average game length is 29 moves.

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

At 1400-1599 Elo, the Blackmar-Diemer Gambit Accepted: Gunderam Defense, Stader Variation has a 46.0% (90% CI: 38.2%-54.0%) win rate for white, based on 106 Lichess games. Average game length is 26 moves with a 3.3% draw rate.

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

At 1600-1799 Elo, the Blackmar-Diemer Gambit Accepted: Gunderam Defense, Stader Variation has a 48.0% (90% CI: 41.9%-54.0%) win rate for white, based on 183 Lichess games. Average game length is 27 moves with a 0.3% draw rate.

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

At 1800-1999 Elo, the Blackmar-Diemer Gambit Accepted: Gunderam Defense, Stader Variation has a 45.9% (90% CI: 40.7%-51.1%) win rate for white, based on 248 Lichess games. Average game length is 28 moves with a 4.2% draw rate.

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

At 2000-2199 Elo, the Blackmar-Diemer Gambit Accepted: Gunderam Defense, Stader Variation has a 46.6% (90% CI: 41.4%-51.9%) win rate for white, based on 242 Lichess games. Average game length is 31 moves with a 3.1% draw rate.

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

At 2200-2499 Elo, the Blackmar-Diemer Gambit Accepted: Gunderam Defense, Stader Variation has a 48.4% (90% CI: 43.0%-53.8%) win rate for white, based on 231 Lichess games. Average game length is 32 moves with a 4.9% draw rate.

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

In Bullet games, the Blackmar-Diemer Gambit Accepted: Gunderam Defense, Stader Variation has a 48.7% (90% CI: 42.5%-54.9%) win rate for white (174 Lichess games). Draw rate is 2.0%.

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

In Blitz games, the Blackmar-Diemer Gambit Accepted: Gunderam Defense, Stader Variation has a 46.4% (90% CI: 43.4%-49.5%) win rate for white (723 Lichess games). Draw rate is 3.4%.

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

In Rapid games, the Blackmar-Diemer Gambit Accepted: Gunderam Defense, Stader Variation has a 50.5% (90% CI: 45.1%-56.0%) win rate for white (227 Lichess games). Draw rate is 4.6%.

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

The Blackmar-Diemer Gambit Accepted: Gunderam Defense, Stader Variation is slightly favors black with a 47.6% (90% CI: 45.2%-50.0%) win rate across all ratings. It performs best at 2200-2499 Elo. Your results depend on your rating, time control, and how well you know the typical plans.