221 games from Lichess · Updated January 2026
At all ratings, the Queen's Gambit Declined: Semi-Slav, Koomen Variation has a 65.5% expected score for Black (we're 90% confident it's between 60.2% and 70.7%), based on 221 Lichess games.
Improves with rating: 20% → 36%
Best in Bullet (63%), worst in Rapid (56%)
Click any cell to filter. Green = above 50%, Red = below 50%.
| Rating | UB | Bulle | Blitz | Rapid | Class |
|---|---|---|---|---|---|
| 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
The Queen's Gambit Declined: Semi-Slav, Koomen Variation has a 30.8% (90% CI: 25.8%-36.0%) win rate for white, based on 221 rated games from Lichess.
The Queen's Gambit Declined: Semi-Slav, Koomen Variation performs best at 2200-2499 Elo with a 30.1% win rate for white (173 games). Win rate tends to decline at higher ratings as opponents know the theory better.
The Queen's Gambit Declined: Semi-Slav, Koomen Variation has a sharpness score of 92.6 (decisive), meaning 92.6% of games end decisively. Average game length is 37 moves.
At 2200-2499 Elo, the Queen's Gambit Declined: Semi-Slav, Koomen Variation has a 30.1% (90% CI: 24.5%-35.9%) win rate for white, based on 173 Lichess games. Average game length is 37 moves with a 6.6% draw rate.
In Blitz games, the Queen's Gambit Declined: Semi-Slav, Koomen Variation has a 31.2% (90% CI: 25.6%-37.1%) win rate for white (173 Lichess games). Draw rate is 7.7%.
The Queen's Gambit Declined: Semi-Slav, Koomen Variation is slightly favors black with a 30.8% (90% CI: 25.8%-36.0%) 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.