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Analyzer

Modern Defense: Bishop Attack, Monkey's Bum

7.7K games from Lichess · Updated January 2026

Tough Sell
White Expected Score43.0%Range (90% confident): 42.1% – 44.0%Based on 7.7K games
0%43.0%100%
Range (90% confident): 42.1% – 44.0%
Outcome Distribution
41.6%2.9%55.6%
Win
Draw
Loss
4...Bxd4
Modern Defense: Bishop Attack, Monkey's Bum
Analyzen=7.7K
Avg Length30 moves
Sharpness97%
Draw Rate2.9%

What is the Modern Defense: Bishop Attack, Monkey's Bum expected score for White?

Snapshot

At all ratings, the Modern Defense: Bishop Attack, Monkey's Bum has a 43.0% expected score for White (we're 90% confident it's between 42.1% and 44.0%), based on 7.7K Lichess games.

White Win% by Rating

Improves with rating: 41% → 54%

0
1000
1200
1400
1600
1800
2000
2200
2500+

  • 0-999: 40.9% win rate (1,382 games)
  • 1000-1199: 39.2% win rate (1,088 games)
  • 1200-1399: 39.5% win rate (1,204 games)
  • 1400-1599: 41.1% win rate (1,087 games)
  • 1600-1799: 43.4% win rate (982 games)
  • 1800-1999: 41.4% win rate (823 games)
  • 2000-2199: 45.7% win rate (599 games)
  • 2200-2499: 41.2% win rate (393 games)
  • 2500+: 54.3% win rate (180 games)

White Win% by Time Control

Best in Bullet (44%), worst in UltraBullet (34%)

UltraBullet
Bullet
Blitz
Rapid
Classical

  • UltraBullet: 34.1% win rate (41 games)
  • Bullet: 43.9% win rate (3,892 games)
  • Blitz: 39.8% win rate (2,668 games)
  • Rapid: 38.2% win rate (1,079 games)
  • Classical: 34.5% win rate (58 games)

White% 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: 42.5% expected score (628 games)
  • 0-999 rating, Blitz: 43.3% expected score (534 games)
  • 0-999 rating, Rapid: 38.9% expected score (215 games)
  • 0-999 rating, Classical: 57.7% expected score (5 games)
  • 1000-1199 rating, UltraBullet: 16.7% expected score (3 games)
  • 1000-1199 rating, Bullet: 44.6% expected score (278 games)
  • 1000-1199 rating, Blitz: 41.0% expected score (568 games)
  • 1000-1199 rating, Rapid: 38.2% expected score (236 games)
  • 1000-1199 rating, Classical: 38.9% expected score (3 games)
  • 1200-1399 rating, UltraBullet: 25.9% expected score (13 games)
  • 1200-1399 rating, Bullet: 47.2% expected score (338 games)
  • 1200-1399 rating, Blitz: 39.0% expected score (555 games)
  • 1200-1399 rating, Rapid: 40.2% expected score (282 games)
  • 1200-1399 rating, Classical: 35.7% expected score (16 games)
  • 1400-1599 rating, UltraBullet: 44.3% expected score (16 games)
  • 1400-1599 rating, Bullet: 41.5% expected score (458 games)
  • 1400-1599 rating, Blitz: 43.8% expected score (392 games)
  • 1400-1599 rating, Rapid: 43.3% expected score (198 games)
  • 1400-1599 rating, Classical: 19.4% expected score (23 games)
  • 1600-1799 rating, UltraBullet: 55.9% expected score (7 games)
  • 1600-1799 rating, Bullet: 44.8% expected score (617 games)
  • 1600-1799 rating, Blitz: 45.0% expected score (247 games)
  • 1600-1799 rating, Rapid: 40.0% expected score (103 games)
  • 1600-1799 rating, Classical: 60.6% expected score (8 games)
  • 1800-1999 rating, UltraBullet: 35.7% expected score (2 games)
  • 1800-1999 rating, Bullet: 44.4% expected score (616 games)
  • 1800-1999 rating, Blitz: 37.1% expected score (165 games)
  • 1800-1999 rating, Rapid: 41.0% expected score (37 games)
  • 1800-1999 rating, Classical: 61.2% expected score (3 games)
  • 2000-2199 rating, Bullet: 47.0% expected score (487 games)
  • 2000-2199 rating, Blitz: 49.1% expected score (105 games)
  • 2000-2199 rating, Rapid: 32.4% expected score (7 games)
  • 2200-2499 rating, Bullet: 42.6% expected score (309 games)
  • 2200-2499 rating, Blitz: 44.7% expected score (83 games)
  • 2200-2499 rating, Rapid: 70.0% expected score (1 games)
  • 2500+ rating, Bullet: 55.5% expected score (161 games)
  • 2500+ rating, Blitz: 57.3% expected score (19 games)

Related Openings

Parent
Modern Defense
48.7%
Variations (5)
Modern Defense: Anti-Modern
53.1%
Modern Defense: Averbakh System
49.0%
Modern Defense: Averbakh Variation, Pseudo-Sämisch
49.5%
Modern Defense: Beefeater Variation
45.4%
Modern Defense: Bishop Attack
49.2%
Analyze Modern Defense: Bishop Attack, Monkey's Bum PositionsGet move-by-move win rates with the TrueElo analyzer

Frequently Asked Questions

What is the Modern Defense: Bishop Attack, Monkey's Bum win rate?

The Modern Defense: Bishop Attack, Monkey's Bum has a 41.6% (90% CI: 40.7%-42.5%) win rate for white, based on 7.7K rated games from Lichess.

At what rating does the Modern Defense: Bishop Attack, Monkey's Bum perform best?

The Modern Defense: Bishop Attack, Monkey's Bum performs best at 2500+ Elo with a 54.3% win rate for white (180 games). Win rate tends to decline at higher ratings as opponents know the theory better.

Is the Modern Defense: Bishop Attack, Monkey's Bum better in blitz or rapid?

Bullet (43.9%) outperforms Classical (34.5%) by 9.4%. Choose your time control wisely.

How sharp is the Modern Defense: Bishop Attack, Monkey's Bum?

The Modern Defense: Bishop Attack, Monkey's Bum has a sharpness score of 97.1 (very decisive), meaning 97.1% of games end decisively. Average game length is 30 moves.

What is the Modern Defense: Bishop Attack, Monkey's Bum win rate at 0-999 Elo?

At 0-999 Elo, the Modern Defense: Bishop Attack, Monkey's Bum has a 40.9% (90% CI: 38.8%-43.1%) win rate for white, based on 1.4K Lichess games. Average game length is 24 moves with a 2.6% draw rate.

What is the Modern Defense: Bishop Attack, Monkey's Bum win rate at 1000-1199 Elo?

At 1000-1199 Elo, the Modern Defense: Bishop Attack, Monkey's Bum has a 39.2% (90% CI: 36.8%-41.7%) win rate for white, based on 1.1K Lichess games. Average game length is 28 moves with a 3.9% draw rate.

What is the Modern Defense: Bishop Attack, Monkey's Bum win rate at 1200-1399 Elo?

At 1200-1399 Elo, the Modern Defense: Bishop Attack, Monkey's Bum has a 39.5% (90% CI: 37.2%-41.9%) win rate for white, based on 1.2K Lichess games. Average game length is 29 moves with a 3.5% draw rate.

What is the Modern Defense: Bishop Attack, Monkey's Bum win rate at 1400-1599 Elo?

At 1400-1599 Elo, the Modern Defense: Bishop Attack, Monkey's Bum has a 41.1% (90% CI: 38.7%-43.6%) win rate for white, based on 1.1K Lichess games. Average game length is 31 moves with a 2.1% draw rate.

What is the Modern Defense: Bishop Attack, Monkey's Bum win rate at 1600-1799 Elo?

At 1600-1799 Elo, the Modern Defense: Bishop Attack, Monkey's Bum has a 43.4% (90% CI: 40.8%-46.0%) win rate for white, based on 982 Lichess games. Average game length is 31 moves with a 2.3% draw rate.

What is the Modern Defense: Bishop Attack, Monkey's Bum win rate at 1800-1999 Elo?

At 1800-1999 Elo, the Modern Defense: Bishop Attack, Monkey's Bum has a 41.4% (90% CI: 38.6%-44.3%) win rate for white, based on 823 Lichess games. Average game length is 33 moves with a 2.6% draw rate.

What is the Modern Defense: Bishop Attack, Monkey's Bum win rate at 2000-2199 Elo?

At 2000-2199 Elo, the Modern Defense: Bishop Attack, Monkey's Bum has a 45.7% (90% CI: 42.4%-49.1%) win rate for white, based on 599 Lichess games. Average game length is 33 moves with a 2.7% draw rate.

What is the Modern Defense: Bishop Attack, Monkey's Bum win rate at 2200-2499 Elo?

At 2200-2499 Elo, the Modern Defense: Bishop Attack, Monkey's Bum has a 41.2% (90% CI: 37.1%-45.3%) win rate for white, based on 393 Lichess games. Average game length is 35 moves with a 3.9% draw rate.

What is the Modern Defense: Bishop Attack, Monkey's Bum win rate at 2500+ Elo?

At 2500+ Elo, the Modern Defense: Bishop Attack, Monkey's Bum has a 54.3% (90% CI: 48.2%-60.3%) win rate for white, based on 180 Lichess games. Average game length is 38 moves with a 3.0% draw rate.

What is the Modern Defense: Bishop Attack, Monkey's Bum win rate in Bullet?

In Bullet games, the Modern Defense: Bishop Attack, Monkey's Bum has a 43.9% (90% CI: 42.6%-45.2%) win rate for white (3.9K Lichess games). Draw rate is 1.6%.

What is the Modern Defense: Bishop Attack, Monkey's Bum win rate in Blitz?

In Blitz games, the Modern Defense: Bishop Attack, Monkey's Bum has a 39.8% (90% CI: 38.3%-41.4%) win rate for white (2.7K Lichess games). Draw rate is 4.5%.

What is the Modern Defense: Bishop Attack, Monkey's Bum win rate in Rapid?

In Rapid games, the Modern Defense: Bishop Attack, Monkey's Bum has a 38.2% (90% CI: 35.8%-40.6%) win rate for white (1.1K Lichess games). Draw rate is 3.6%.

Is the Modern Defense: Bishop Attack, Monkey's Bum a good opening?

The Modern Defense: Bishop Attack, Monkey's Bum is slightly favors black with a 41.6% (90% CI: 40.7%-42.5%) 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.