Chess puzzle (Checkmate)
Opening: Queens_Gambit_Declined, Queens_Gambit_Declined_Cambridge_Springs_Defense
Moves: 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 c6 5. e3 Nbd7 6. Nf3 Qa5 7. a3 Ne4 8. Qc2
Nxg5 9. Nxg5 dxc4 10. Nxh7 b5 11. Nxf8 Rxf8 12. Be2 Nf6 13. O-O Bb7 14. Bf3 Rh8
15. Ne4 O-O-O 16. Nc5 Qc7 17. a4 *
Position (FEN): 2kr3r/pbq2pp1/2p1pn2/1pN5/P1pP4/4PB2/1PQ2PPP/R4RK1 b - - 0 17
Black to move.
Themes: Kingside Attack Middlegame Mate in 1 
Puzzle rating: 626
Best move: Qxh2#