Chess puzzle (Checkmate)
Opening: Sicilian_Defense, Sicilian_Defense_Taimanov_Variation
Moves: 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 e6 5. Nc3 a6 6. Be2 Qc7 7. O-O Nf6 8.
Nxc6 bxc6 9. Bg5 Be7 10. Kh1 h5 11. Qd2 Ng4 12. Bxe7 *
Position (FEN): r1b1k2r/2qpBpp1/p1p1p3/7p/4P1n1/2N5/PPPQBPPP/R4R1K b kq - 0 12
Black to move.
Themes: Kingside Attack Middlegame Mate in 1 
Puzzle rating: 734
Best move: Qxh2#