Chess puzzle (Checkmate)
Opening: Queens_Gambit_Declined, Queens_Gambit_Declined_Other_variations
Moves: 1. d4 d5 2. c4 e6 3. e3 Nf6 4. a3 c5 5. dxc5 Bxc5 6. b4 Bb6 7. c5 Bc7 8. Bb2
Nc6 9. Nf3 O-O 10. Be2 b6 11. b5 Ne7 12. c6 a6 13. a4 axb5 14. axb5 Rxa1 15.
Bxa1 Ng6 16. O-O Qd6 17. h3 Nh4 18. Nxh4 *
Position (FEN): 2b2rk1/2b2ppp/1pPqpn2/1P1p4/7N/4P2P/4BPP1/BN1Q1RK1 b - - 0 18
Black to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 456
Best move: Qh2#