Chess puzzle (Checkmate)
Opening: Sicilian_Defense, Sicilian_Defense_Modern_Variations
Moves: 1. e4 c5 2. Nf3 d6 3. h3 Nf6 4. b3 Nxe4 5. Bb2 Nc6 6. Qe2 Nf6 7. Bxf6 gxf6 8.
Nc3 Bf5 9. O-O-O Nb4 10. d3 Bh6+ 11. Kb2 Qa5 12. g4 Be6 13. Nd2 Bg7 14. Re1 f5
15. Nc4 Bxc4 *
Position (FEN): r3k2r/pp2ppbp/3p4/q1p2p2/1nb3P1/1PNP3P/PKP1QP2/4RB1R w kq - 0 16
White to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 519
Best move: Qxe7#