Chess puzzle (Checkmate)
Opening: Slav_Defense, Slav_Defense_Three_Knights_Variation
Moves: 1. d4 Nf6 2. Nf3 d5 3. c4 c6 4. Nc3 Bf5 5. e3 e6 6. Be2 dxc4 7. O-O b5 8. a4 b4
9. Nb1 Qd5 10. Ne5 Bd6 11. Bxc4 Qe4 12. Nd2 Qh4 13. g3 Qh6 14. Ndf3 Ng4 15. Bd2
Bxe5 16. dxe5 Be4 17. Bxb4 Bxf3 18. Qxf3 *
Position (FEN): rn2k2r/p4ppp/2p1p2q/4P3/PBB3n1/4PQP1/1P3P1P/R4RK1 b kq - 0 18
Black to move.
Themes: Kingside Attack Middlegame Mate in 1 
Puzzle rating: 523
Best move: Qxh2#