Chess puzzle (Checkmate)
Opening: Sicilian_Defense, Sicilian_Defense_Modern_Variations
Moves: 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Bd3 a6 6. c3 e6 7. Bg5 Be7 8. Nd2
b5 9. a3 Bb7 10. O-O O-O 11. Rc1 Nbd7 12. Bb1 d5 13. f3 Bc5 14. Kh1 dxe4 15.
Nxe4 Bxd4 16. Qxd4 e5 17. Qd3 h6 18. Nxf6+ Nxf6 19. Bxf6 Qxf6 *
Position (FEN): r4rk1/1b3pp1/p4q1p/1p2p3/8/P1PQ1P2/1P4PP/1BR2R1K w - - 0 20
White to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 889
Best move: Qh7#