Chess puzzle (Checkmate)
Opening: Queens_Gambit_Declined, Queens_Gambit_Declined_Ragozin_Defense
Moves: 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Bb4 5. cxd5 exd5 6. Bg5 O-O 7. e3 c5 8.
dxc5 Nbd7 9. Qb3 Qa5 10. Bd3 Nxc5 11. Qc2 Nxd3+ 12. Qxd3 Ne4 13. O-O Bxc3 14.
bxc3 Bf5 15. Rfd1 Be6 16. c4 Nxg5 17. Nxg5 dxc4 *
Position (FEN): r4rk1/pp3ppp/4b3/q5N1/2p5/3QP3/P4PPP/R2R2K1 w - - 0 18
White to move.
Themes: Kingside Attack Middlegame Mate in 1 
Puzzle rating: 820
Best move: Qxh7#