Queen's Gambit Declined: Semi-Slav, Koomen Variation
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Statistics from Lichess
884 games: White 37.6% / Draw 6.8% / Black 55.7%
| Next move | Games | White / Draw / BlackW / D / B |
|---|---|---|
| 628628 | ||
| 9090 | ||
| 7878 | ||
| 4444 | ||
| 1313 | ||
| 1010 | ||
| 99 | ||
| 55 |
Rated Lichess games between players rated 1600 to 2500, from the Lichess opening explorer, updated Oct 28, 2026
Engine evaluation
+0.40 White is slightly better
Best play: 8. axb5 Bxc3 9. Bxc3 cxb5 10. Bd2 Nf6 11. b3 O-O 12. bxc4 bxc4
Stockfish 19, depth 30, after the line's last move. Scores are in pawns, from White's side.
Overview
Queen's Gambit Declined: Semi-Slav, Koomen Variation (ECO D31, Closed & Semi-Closed Games) is a declined gambit in the Semi-Slav Defense: Noteboom Variation, reached after 1. d4 d5 2. c4 e6 3. Nc3 c6 4. Nf3 dxc4 5. e3 b5 6. a4 Bb4 7. Bd2 Qe7 (7 moves).
In 884 rated Lichess games between players rated 1600 to 2500, White won 37.6%, Black 55.7% and 6.8% were drawn. White's most played move here is 8. axb5, in 71% of those games.
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Cite this page
Caissa Codex. “Queen's Gambit Declined: Semi-Slav, Koomen Variation (D31)”. Lichess data as of 28 Oct 2026. https://chesscodex.org/openings/queens-gambit-declined-semi-slav-koomen-variation