Chess puzzle (Checkmate)
Opening: English_Opening, English_Opening_Agincourt_Defense
Moves: 1. c4 e6 2. d4 c5 3. Nc3 cxd4 4. Qxd4 Nc6 5. Qd1 Qb6 6. Nf3 Nf6 7. e4 a6 8. Bd3
Bc5 9. O-O Ng4 10. Qc2 Qc7 11. a3 Nd4 12. Nxd4 *
Position (FEN): r1b1k2r/1pqp1ppp/p3p3/2b5/2PNP1n1/P1NB4/1PQ2PPP/R1B2RK1 b kq - 0 12
Black to move.
Themes: Kingside Attack Opening Mate in 1 
Puzzle rating: 858
Best move: Qxh2#