Chess puzzle (Checkmate)
Opening: Queens_Gambit_Declined, Queens_Gambit_Declined_Marshall_Defense
Moves: 1. d4 d5 2. c4 Nf6 3. cxd5 Nxd5 4. e4 Nb6 5. Nc3 g6 6. h4 h5 7. Nh3 Bg7 8. Be3
Nc6 9. d5 Ne5 10. Bd4 O-O 11. Ng5 c6 12. dxc6 bxc6 13. a4 a5 14. Be2 Rb8 15.
O-O Qc7 16. Qc2 Ng4 17. Bxg7 *
Position (FEN): 1rb2rk1/2q1ppB1/1np3p1/p5Np/P3P1nP/2N5/1PQ1BPP1/R4RK1 b - - 0 17
Black to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 520
Best move: Qh2#