Chess puzzle (Checkmate)
Opening: Sicilian_Defense, Sicilian_Defense_Alapin_Variation
Moves: 1. e4 c5 2. c3 d5 3. exd5 Qxd5 4. d4 Nc6 5. Nf3 Bg4 6. Be2 Nf6 7. c4 Qf5 8. d5
Bxf3 9. Bxf3 Nd4 10. Nc3 Nc2+ 11. Kf1 Nxa1 12. Nb5 Rc8 13. Qa4 Nd7 14. Qxa7
Qd3+ 15. Be2 Qc2 16. g3 Qxc1+ 17. Kg2 Qxb2 18. Qxb7 Rb8 19. Qc6 Rxb5 *
Position (FEN): 4kb1r/3npppp/2Q5/1rpP4/2P5/6P1/Pq2BPKP/n6R w k - 0 20
White to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 989
Best move: Qc8#