Chess puzzle (Checkmate)
Opening: Queens_Gambit_Declined, Queens_Gambit_Declined_Ragozin_Defense
Moves: 1. d4 d5 2. c4 e6 3. Nf3 Nf6 4. Nc3 Bb4 5. Qa4+ Nc6 6. Qc2 Bd7 7. a3 Bxc3+ 8.
bxc3 O-O 9. e3 dxc4 10. Bxc4 a6 11. e4 Na5 12. Bd3 Bb5 13. Bxb5 axb5 14. Bg5
Nc4 15. e5 h6 16. exf6 hxg5 17. Nxg5 Qxf6 *
Position (FEN): r4rk1/1pp2pp1/4pq2/1p4N1/2nP4/P1P5/2Q2PPP/R3K2R w KQ - 0 18
White to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 549
Best move: Qh7#