Chess puzzle (Checkmate)
Opening: Semi-Slav_Defense, Semi-Slav_Defense_Other_variations
Moves: 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c6 5. Bg5 Be7 6. e3 h6 7. Bh4 O-O 8. Bd3 b6
9. cxd5 Nxd5 10. Bc2 Bxh4 11. Qd3 Nxc3 *
Position (FEN): rnbq1rk1/p4pp1/1pp1p2p/8/3P3b/2nQPN2/PPB2PPP/R3K2R w KQ - 0 12
White to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 845
Best move: Qh7#