Chess puzzle (Checkmate)
Opening: Queens_Gambit_Declined, Queens_Gambit_Declined_Marshall_Defense
Moves: 1. d4 d5 2. c4 Nf6 3. Nc3 c6 4. cxd5 cxd5 5. Nf3 Nc6 6. Bg5 Ne4 7. Bf4 Nxc3 8.
bxc3 Qa5 9. Bd2 Qc7 10. e3 e5 11. Nxe5 Nxe5 12. dxe5 Qxe5 13. Bb5+ Kd8 14. c4
a6 15. Ba4 Bd6 16. cxd5 b5 17. Bb3 Ke7 18. O-O *
Position (FEN): r1b4r/4kppp/p2b4/1p1Pq3/8/1B2P3/P2B1PPP/R2Q1RK1 b - - 3 18
Black to move.
Themes: Kingside Attack Middlegame Mate in 1 
Puzzle rating: 546
Best move: Qxh2#