Chess puzzle (Checkmate)
Opening: Sicilian_Defense, Sicilian_Defense_Kan_Variation
Moves: 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. a3 Qc7 6. c4 b6 7. Nc3 Bb7 8. Bd3
Nf6 9. O-O Nc6 10. Be3 Ne5 11. Rc1 Neg4 12. Qe2 *
Position (FEN): r3kb1r/1bqp1ppp/pp2pn2/8/2PNP1n1/P1NBB3/1P2QPPP/2R2RK1 b kq - 11 12
Black to move.
Themes: Kingside Attack Middlegame Mate in 1 
Puzzle rating: 566
Best move: Qxh2#