Chess puzzle (Checkmate)
Opening: Sicilian_Defense, Sicilian_Defense_Closed
Moves: 1. e4 c5 2. Nc3 d6 3. Nf3 Nc6 4. Bb5 Bd7 5. O-O a6 6. Bxc6 Bxc6 7. d4 cxd4 8.
Nxd4 e6 9. f4 Nf6 10. Nxc6 bxc6 11. Qf3 d5 12. e5 Nd7 13. Qg3 Bc5+ 14. Kh1 O-O
15. f5 Bb6 16. f6 g6 17. Qh4 Kh8 18. Rf3 Nxe5 19. Qh6 Nxf3 *
Position (FEN): r2q1r1k/5p1p/pbp1pPpQ/3p4/8/2N2n2/PPP3PP/R1B4K w - - 0 20
White to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 890
Best move: Qg7#