Chess puzzle (Advantage)
Opening: Semi-Slav_Defense, Semi-Slav_Defense_Accelerated_Move_Order
Moves: 1. d4 d5 2. c4 e6 3. Nc3 c6 4. Nf3 h6 5. Bd2 f6 6. e3 Ne7 7. Bd3 g5 8. Qe2 Bd7
9. g4 Qc7 10. O-O-O a5 11. cxd5 cxd5 12. Bb5 Bxb5 13. Qxb5+ Nd7 14. Kb1 Nc6 15.
e4 a4 16. exd5 Ra5 17. Qc4 Nb6 18. Nb5 *
Position (FEN): 4kb1r/1pq5/1nn1pp1p/rN1P2p1/p1QP2P1/5N2/PP1B1P1P/1K1R3R b k - 4 18
Black to move.
Themes:  Middlegame  
Puzzle rating: 2249
Best move: Qh7+