Queen's Gambit Declined: Harrwitz Attack 9…Qa5 10. a3
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Statistics from Lichess
5,971 games: White 51.5% / Draw 9.3% / Black 39.2%
| Next move | Games | White / Draw / BlackW / D / B |
|---|---|---|
| 2,2532,253 | ||
| 1,3261,326 | ||
| 1,0481,048 | ||
| 626626 | ||
| 463463 | ||
| 118118 | ||
| 3737 | ||
| 2727 |
Rated Lichess games between players rated 1600 to 2500, from the Lichess opening explorer, updated Nov 1, 2026
Engine evaluation
+0.20 The position is about equal
Best play: 10... Be7 11. Be2 Ne4 12. cxd5 Nxc3 13. bxc3 exd5 14. O-O Bf6 15. c4
Stockfish 19, depth 30, after the line's last move. Scores are in pawns, from White's side.
Overview
Queen's Gambit Declined: Harrwitz Attack (ECO D37, Closed & Semi-Closed Games) is a declined gambit in the Queen's Gambit Declined: Harrwitz Attack, Main Line, reached after 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bf4 O-O 6. e3 c5 7. dxc5 Bxc5 8. Qc2 Nc6 9. Rd1 Qa5 10. a3 (10 moves).
In 5,971 rated Lichess games between players rated 1600 to 2500, White won 51.5%, Black 39.2% and 9.3% were drawn. Black's most played move here is 10…Be7, in 38% of those games.
Written from the Lichess opening list and explorer. Know this line well? Write about it.
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How to answer 10. a3
10…Re8 scores best for Black: 49.1%, with Black winning 44.6% and White 46.5% of 1,326 games. The most played, 10…Be7, scores 46.1% in 2,253 games, and 10…dxc4 scores lowest: 35.6%. Stockfish's first choice is 10…Be7.
Main answers: those played in at least 5% of these games. Score: Black's wins plus half the draws, in rated Lichess games between players rated 1600 to 2500. How to play against other popular openings
Cite this page
Caissa Codex. “Queen's Gambit Declined: Harrwitz Attack (D37)”. Lichess data as of 1 Nov 2026. https://chesscodex.org/openings/queens-gambit-declined-harrwitz-attack-3