Chess puzzle (Checkmate)
Opening: Sicilian_Defense, Sicilian_Defense_Najdorf_Variation
Moves: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 Nbd7 7. Bc4 b5 8.
Bd3 Bb7 9. O-O Qb6 10. Be3 Qc7 11. a4 b4 12. Na2 Nxe4 13. Nxb4 e6 14. Qe1 Be7
15. f3 Nef6 16. Qg3 O-O 17. Bh6 Nh5 18. Qh3 Qc5 19. Be3 Nf4 *
Position (FEN): r4rk1/1b1nbppp/p2pp3/2q5/PN1N1n2/3BBP1Q/1PP3PP/R4RK1 w - - 9 20
White to move.
Themes: Kingside Attack Middlegame Mate in 1 
Puzzle rating: 1386
Best move: Qxh7#