Chess puzzle (Checkmate)
Opening: Queens_Gambit_Declined, Queens_Gambit_Declined_Austrian_Defense
Moves: 1. d4 d5 2. c4 c5 3. Nf3 Nf6 4. cxd5 Nxd5 5. g3 e6 6. Bg2 b6 7. O-O Bb7 8. Nc3
Nxc3 9. bxc3 Be7 10. a4 O-O 11. a5 Bf6 12. e3 cxd4 13. cxd4 b5 14. Ba3 Be7 15.
Bxe7 Qxe7 16. Qb1 a6 17. h4 Qf6 18. Ng5 Bxg2 *
Position (FEN): rn3rk1/5ppp/p3pq2/Pp4N1/3P3P/4P1P1/5Pb1/RQ3RK1 w - - 0 19
White to move.
Themes: Kingside Attack Middlegame Mate in 1 
Puzzle rating: 643
Best move: Qxh7#