Chess puzzle (Checkmate)
Opening: Queens_Gambit_Declined, Queens_Gambit_Declined_Marshall_Defense
Moves: 1. d4 Nf6 2. c4 d5 3. e3 Bf5 4. Nf3 e6 5. Nc3 Nbd7 6. cxd5 Nxd5 7. Bd3 Bg6 8.
Bxg6 hxg6 9. Nxd5 exd5 10. O-O c6 11. Ne5 Qc7 12. a4 f6 13. Nxg6 *
Position (FEN): r3kb1r/ppqn2p1/2p2pN1/3p4/P2P4/4P3/1P3PPP/R1BQ1RK1 b kq - 0 13
Black to move.
Themes: Kingside Attack Middlegame Mate in 1 
Puzzle rating: 521
Best move: Qxh2#