Chess puzzle (Checkmate)
Opening: Queens_Pawn_Game, Queens_Pawn_Game_Mason_Variation
Moves: 1. d4 d5 2. Bf4 Nf6 3. e3 e6 4. Bd3 c5 5. c3 Nc6 6. Nf3 Nh5 7. Bg3 Nxg3 8. fxg3
c4 9. Bc2 Bd6 10. Ba4 Bd7 11. O-O Ne7 12. Nbd2 O-O 13. b3 b5 14. bxc4 bxa4 15.
cxd5 Nxd5 16. Nc4 Bc7 17. Qc2 Bb5 18. Ng5 Bxc4 *
Position (FEN): r2q1rk1/p1b2ppp/4p3/3n2N1/p1bP4/2P1P1P1/P1Q3PP/R4RK1 w - - 0 19
White to move.
Themes: Kingside Attack Middlegame Mate in 1 
Puzzle rating: 845
Best move: Qxh7#