Chess puzzle (Checkmate)
Opening: Sicilian_Defense, Sicilian_Defense_Najdorf_Variation
Moves: 1. e4 c5 2. Nf3 d6 3. Nc3 Nf6 4. d4 cxd4 5. Nxd4 a6 6. f3 e5 7. Nb3 Be6 8. Be3
Nbd7 9. g4 Nb6 10. g5 Nfd7 11. h4 Rc8 12. Qd2 Nc4 13. Bxc4 Rxc4 14. O-O-O b5
15. Nd5 Nc5 16. Nxc5 dxc5 17. Nf6+ gxf6 *
Position (FEN): 3qkb1r/5p1p/p3bp2/1pp1p1P1/2r1P2P/4BP2/PPPQ4/2KR3R w k - 0 18
White to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 940
Best move: Qxd8#