Chess puzzle (Checkmate)
Opening: Queens_Gambit_Accepted, Queens_Gambit_Accepted_Saduleto_Variation
Moves: 1. d4 d5 2. c4 dxc4 3. e4 e6 4. Bxc4 Nf6 5. Nc3 Be7 6. e5 Nd5 7. Nf3 O-O 8. O-O
Nc6 9. a3 a6 10. Qb3 Nxc3 11. Qxc3 b5 12. Bb3 Bb7 13. Qe3 Na5 14. Bc2 Bd5 15.
b4 Nc4 16. Qd3 a5 *
Position (FEN): r2q1rk1/2p1bppp/4p3/pp1bP3/1PnP4/P2Q1N2/2B2PPP/R1B2RK1 w - - 0 17
White to move.
Themes: Kingside Attack Middlegame Mate in 1 
Puzzle rating: 517
Best move: Qxh7#