Chess puzzle (Checkmate)
Moves: 1. e4 e6 2. d4 d5 3. Nd2 Nf6 4. e5 Nfd7 5. Bd3 c5 6. c3 Nc6 7. Ne2 cxd4 8. cxd4
Qb6 9. Nf3 f6 10. exf6 Nxf6 11. O-O Bd6 12. Bf4 Bxf4 13. Nxf4 Qxb2 14. Ng5 O-O
15. Ngxe6 Bxe6 16. Nxe6 Rfe8 17. Nc7 Qxd4 18. Nxa8 Rxa8 19. Rc1 Qh4 20. g3 Qh3
21. Qf3 Ne5 22. Qe2 Nfg4 23. f4 Nxd3 24. Qe6+ Kh8 25. Rc8+ Rxc8 *
Position (FEN): 2r4k/pp4pp/4Q3/3p4/5Pn1/3n2Pq/P6P/5RK1 w - - 0 26
White to move.
Themes:  Endgame Back Rank Mate, Mate in 1 
Puzzle rating: 670
Best move: Qxc8#