Chess puzzle (Checkmate)
Moves: 1. d4 e5 2. dxe5 Bc5 3. Nf3 d6 4. Nbd2 dxe5 5. Nxe5 Nf6 6. e3 O-O 7. g3 Nbd7 8.
Nxd7 Bxd7 9. Nb3 Bb4+ 10. Bd2 Bd6 11. Bg2 Bc6 12. Bxc6 bxc6 13. Qe2 Ne4 14.
O-O-O Qe7 15. f3 Nxd2 16. Rxd2 Ba3 17. bxa3 Qxa3+ 18. Kb1 Rab8 19. Qc4 a5 20.
Rd7 a4 21. Rhd1 axb3 22. cxb3 Ra8 23. Qc2 Ra7 24. Rd8 g6 25. Rxf8+ Kxf8 26. Rc1
Kg8 27. Qc5 *
Position (FEN): 6k1/r1p2p1p/2p3p1/2Q5/8/qP2PPP1/P6P/1KR5 b - - 3 27
Black to move.
Themes:  Endgame Mate in 1 
Puzzle rating: 835
Best move: Qxa2#