TrueEloPlay what wins.
Analyzer

King's Gambit Accepted: Bonsch-Osmolovsky Variation

197K games from Lichess · Updated January 2026

Playable
White Expected Score48.8%Range (90% confident): 48.7% – 49.0%Based on 197K games
0%48.8%100%
Range (90% confident): 48.7% – 49.0%
Outcome Distribution
47.0%3.5%49.4%
Win
Draw
Loss
3...Ne7
King's Gambit Accepted: Bonsch-Osmolovsky Variation
Analyzen=197K
Avg Length33 moves
Sharpness97%
Draw Rate3.5%

What is the King's Gambit Accepted: Bonsch-Osmolovsky Variation expected score for White?

Snapshot

At all ratings, the King's Gambit Accepted: Bonsch-Osmolovsky Variation has a 48.8% expected score for White (we're 90% confident it's between 48.7% and 49.0%), based on 197K Lichess games.

Extra Analysis

Deep-dive datasets for this opening

Gambit BreakpointWhite

Peak: -1.1% · Breakpoint: 0-999

White Win% by Rating

Declines with rating: 51% → 48%

0
1000
1200
1400
1600
1800
2000
2200
2500+

  • 0-999: 51.0% win rate (566 games)
  • 1000-1199: 49.5% win rate (2,388 games)
  • 1200-1399: 49.0% win rate (8,398 games)
  • 1400-1599: 48.7% win rate (24,667 games)
  • 1600-1799: 47.0% win rate (54,104 games)
  • 1800-1999: 46.7% win rate (66,187 games)
  • 2000-2199: 45.9% win rate (30,397 games)
  • 2200-2499: 45.8% win rate (9,288 games)
  • 2500+: 48.3% win rate (1,018 games)

White Win% by Time Control

Best in Classical (49%), worst in UltraBullet (38%)

UltraBullet
Bullet
Blitz
Rapid
Classical

  • UltraBullet: 37.6% win rate (53 games)
  • Bullet: 46.9% win rate (39,138 games)
  • Blitz: 46.9% win rate (128,772 games)
  • Rapid: 48.0% win rate (28,341 games)
  • Classical: 49.2% win rate (709 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, UltraBullet: 70.0% expected score (1 games)
  • 0-999 rating, Bullet: 51.9% expected score (316 games)
  • 0-999 rating, Blitz: 52.4% expected score (187 games)
  • 0-999 rating, Rapid: 54.0% expected score (61 games)
  • 0-999 rating, Classical: 50.0% expected score (1 games)
  • 1000-1199 rating, UltraBullet: 30.0% expected score (1 games)
  • 1000-1199 rating, Bullet: 47.6% expected score (1,183 games)
  • 1000-1199 rating, Blitz: 53.2% expected score (1,006 games)
  • 1000-1199 rating, Rapid: 53.1% expected score (195 games)
  • 1000-1199 rating, Classical: 83.4% expected score (3 games)
  • 1200-1399 rating, UltraBullet: 61.2% expected score (3 games)
  • 1200-1399 rating, Bullet: 50.8% expected score (3,294 games)
  • 1200-1399 rating, Blitz: 49.2% expected score (4,404 games)
  • 1200-1399 rating, Rapid: 51.5% expected score (682 games)
  • 1200-1399 rating, Classical: 47.0% expected score (15 games)
  • 1400-1599 rating, UltraBullet: 20.4% expected score (12 games)
  • 1400-1599 rating, Bullet: 51.0% expected score (5,829 games)
  • 1400-1599 rating, Blitz: 49.6% expected score (15,732 games)
  • 1400-1599 rating, Rapid: 49.6% expected score (2,994 games)
  • 1400-1599 rating, Classical: 56.4% expected score (100 games)
  • 1600-1799 rating, UltraBullet: 45.1% expected score (29 games)
  • 1600-1799 rating, Bullet: 47.7% expected score (8,766 games)
  • 1600-1799 rating, Blitz: 48.7% expected score (36,895 games)
  • 1600-1799 rating, Rapid: 49.7% expected score (8,078 games)
  • 1600-1799 rating, Classical: 49.5% expected score (336 games)
  • 1800-1999 rating, UltraBullet: 32.4% expected score (7 games)
  • 1800-1999 rating, Bullet: 48.3% expected score (9,044 games)
  • 1800-1999 rating, Blitz: 48.4% expected score (45,325 games)
  • 1800-1999 rating, Rapid: 49.6% expected score (11,613 games)
  • 1800-1999 rating, Classical: 51.5% expected score (198 games)
  • 2000-2199 rating, Bullet: 45.9% expected score (6,429 games)
  • 2000-2199 rating, Blitz: 48.2% expected score (19,766 games)
  • 2000-2199 rating, Rapid: 51.8% expected score (4,155 games)
  • 2000-2199 rating, Classical: 50.0% expected score (47 games)
  • 2200-2499 rating, Bullet: 45.3% expected score (3,746 games)
  • 2200-2499 rating, Blitz: 50.8% expected score (4,976 games)
  • 2200-2499 rating, Rapid: 52.8% expected score (558 games)
  • 2200-2499 rating, Classical: 55.3% expected score (8 games)
  • 2500+ rating, Bullet: 51.7% expected score (531 games)
  • 2500+ rating, Blitz: 51.8% expected score (481 games)
  • 2500+ rating, Rapid: 34.7% expected score (5 games)
  • 2500+ rating, Classical: 70.0% expected score (1 games)

Related Openings

Parent
King's Gambit Accepted
43.1%
Variations (5)
King's Gambit Accepted: Abbazia Defense
46.9%
King's Gambit Accepted: Allgaier Gambit
55.5%
King's Gambit Accepted: Allgaier Gambit, Thorold Attack
59.1%
King's Gambit Accepted: Allgaier Gambit, Urusov Attack
55.2%
King's Gambit Accepted: Allgaier, Blackburne Gambit
57.5%
Analyze King's Gambit Accepted: Bonsch-Osmolovsky Variation PositionsGet move-by-move win rates with the TrueElo analyzer

Frequently Asked Questions

What is the King's Gambit Accepted: Bonsch-Osmolovsky Variation win rate?

The King's Gambit Accepted: Bonsch-Osmolovsky Variation has a 47.0% (90% CI: 46.9%-47.2%) win rate for white, based on 197K rated games from Lichess.

At what rating does the King's Gambit Accepted: Bonsch-Osmolovsky Variation perform best?

The King's Gambit Accepted: Bonsch-Osmolovsky Variation performs best at 1400-1599 Elo with a 48.7% win rate for white (25K games). Win rate tends to decline at higher ratings as opponents know the theory better.

Is the King's Gambit Accepted: Bonsch-Osmolovsky Variation better in blitz or rapid?

Rapid (48.0%) outperforms UltraBullet (37.6%) by 10.4%. Choose your time control wisely.

How sharp is the King's Gambit Accepted: Bonsch-Osmolovsky Variation?

The King's Gambit Accepted: Bonsch-Osmolovsky Variation 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 King's Gambit Accepted: Bonsch-Osmolovsky Variation win rate at 0-999 Elo?

At 0-999 Elo, the King's Gambit Accepted: Bonsch-Osmolovsky Variation has a 51.0% (90% CI: 47.6%-54.5%) win rate for white, based on 566 Lichess games. Average game length is 24 moves with a 2.7% draw rate.

What is the King's Gambit Accepted: Bonsch-Osmolovsky Variation win rate at 1000-1199 Elo?

At 1000-1199 Elo, the King's Gambit Accepted: Bonsch-Osmolovsky Variation has a 49.5% (90% CI: 47.8%-51.2%) win rate for white, based on 2.4K Lichess games. Average game length is 25 moves with a 1.8% draw rate.

What is the King's Gambit Accepted: Bonsch-Osmolovsky Variation win rate at 1200-1399 Elo?

At 1200-1399 Elo, the King's Gambit Accepted: Bonsch-Osmolovsky Variation has a 49.0% (90% CI: 48.1%-49.9%) win rate for white, based on 8.4K Lichess games. Average game length is 28 moves with a 2.0% draw rate.

What is the King's Gambit Accepted: Bonsch-Osmolovsky Variation win rate at 1400-1599 Elo?

At 1400-1599 Elo, the King's Gambit Accepted: Bonsch-Osmolovsky Variation has a 48.7% (90% CI: 48.2%-49.2%) win rate for white, based on 25K Lichess games. Average game length is 30 moves with a 2.5% draw rate.

What is the King's Gambit Accepted: Bonsch-Osmolovsky Variation win rate at 1600-1799 Elo?

At 1600-1799 Elo, the King's Gambit Accepted: Bonsch-Osmolovsky Variation has a 47.0% (90% CI: 46.7%-47.4%) win rate for white, based on 54K Lichess games. Average game length is 32 moves with a 3.2% draw rate.

What is the King's Gambit Accepted: Bonsch-Osmolovsky Variation win rate at 1800-1999 Elo?

At 1800-1999 Elo, the King's Gambit Accepted: Bonsch-Osmolovsky Variation has a 46.7% (90% CI: 46.4%-47.1%) win rate for white, based on 66K Lichess games. Average game length is 34 moves with a 3.7% draw rate.

What is the King's Gambit Accepted: Bonsch-Osmolovsky Variation win rate at 2000-2199 Elo?

At 2000-2199 Elo, the King's Gambit Accepted: Bonsch-Osmolovsky Variation has a 45.9% (90% CI: 45.5%-46.4%) win rate for white, based on 30K Lichess games. Average game length is 35 moves with a 4.4% draw rate.

What is the King's Gambit Accepted: Bonsch-Osmolovsky Variation win rate at 2200-2499 Elo?

At 2200-2499 Elo, the King's Gambit Accepted: Bonsch-Osmolovsky Variation has a 45.8% (90% CI: 44.9%-46.6%) win rate for white, based on 9.3K Lichess games. Average game length is 36 moves with a 5.8% draw rate.

What is the King's Gambit Accepted: Bonsch-Osmolovsky Variation win rate at 2500+ Elo?

At 2500+ Elo, the King's Gambit Accepted: Bonsch-Osmolovsky Variation has a 48.3% (90% CI: 45.7%-50.9%) win rate for white, based on 1.0K Lichess games. Average game length is 37 moves with a 6.7% draw rate.

What is the King's Gambit Accepted: Bonsch-Osmolovsky Variation win rate in Bullet?

In Bullet games, the King's Gambit Accepted: Bonsch-Osmolovsky Variation has a 46.9% (90% CI: 46.5%-47.3%) win rate for white (39K Lichess games). Draw rate is 2.5%.

What is the King's Gambit Accepted: Bonsch-Osmolovsky Variation win rate in Blitz?

In Blitz games, the King's Gambit Accepted: Bonsch-Osmolovsky Variation has a 46.9% (90% CI: 46.6%-47.1%) win rate for white (129K Lichess games). Draw rate is 3.7%.

What is the King's Gambit Accepted: Bonsch-Osmolovsky Variation win rate in Rapid?

In Rapid games, the King's Gambit Accepted: Bonsch-Osmolovsky Variation has a 48.0% (90% CI: 47.5%-48.5%) win rate for white (28K Lichess games). Draw rate is 4.2%.

What is the King's Gambit Accepted: Bonsch-Osmolovsky Variation win rate in Classical?

In Classical games, the King's Gambit Accepted: Bonsch-Osmolovsky Variation has a 49.2% (90% CI: 46.1%-52.3%) win rate for white (709 Lichess games). Draw rate is 4.3%.

Is the King's Gambit Accepted: Bonsch-Osmolovsky Variation a good opening?

The King's Gambit Accepted: Bonsch-Osmolovsky Variation is statistically balanced with a 47.0% (90% CI: 46.9%-47.2%) win rate across all ratings. It performs best at 1400-1599 Elo. Your results depend on your rating, time control, and how well you know the typical plans.