Chess puzzle (Checkmate)
Opening: French_Defense, French_Defense_Queens_Knight
Moves: 1. e4 e6 2. Nc3 d5 3. Bd3 dxe4 4. Nxe4 Nf6 5. Qf3 Nxe4 6. Qxe4 Qf6 7. Nf3 Nc6
8. O-O Bd6 9. Rb1 h5 10. b3 Ne5 11. Nxe5 Qxe5 12. Qf3 *
Position (FEN): r1b1k2r/ppp2pp1/3bp3/4q2p/8/1P1B1Q2/P1PP1PPP/1RB2RK1 b kq - 1 12
Black to move.
Themes: Kingside Attack Middlegame Mate in 1 
Puzzle rating: 512
Best move: Qxh2#