Chess puzzle (Checkmate)
Opening: Queens_Pawn_Game, Queens_Pawn_Game_Colle_System
Moves: 1. d4 Nf6 2. Nf3 e6 3. e3 d5 4. Bd3 c5 5. c3 Nc6 6. Nbd2 b6 7. O-O c4 8. Bc2
Bd6 9. Qe2 Qc7 10. Re1 Bb7 11. e4 dxe4 12. Nxe4 Nxe4 13. Bxe4 O-O 14. Qxc4 Rac8
15. Qd3 g6 16. g3 f5 17. Bxc6 Qxc6 18. Ng5 *
Position (FEN): 2r2rk1/pb5p/1pqbp1p1/5pN1/3P4/2PQ2P1/PP3P1P/R1B1R1K1 b - - 1 18
Black to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 650
Best move: Qh1#