Chess puzzle (Checkmate)
Moves: 1. d4 d5 2. Bf4 Nf6 3. Nf3 Nc6 4. e3 Bf5 5. c3 e6 6. Qb3 Rb8 7. Nbd2 Bd6 8. Bb5
a6 9. Bxc6+ bxc6 10. Qa4 Rb6 11. Bxd6 Qxd6 12. Ne5 Nd7 13. f4 Nxe5 14. fxe5 Qd7
15. O-O O-O 16. b4 Rfb8 17. Qb3 a5 18. a3 axb4 19. axb4 Qe8 20. Ra7 R6b7 21.
Rfa1 Bd3 22. Qb2 h6 23. Nb3 Qd8 24. Nc5 Rxa7 25. Rxa7 Qg5 26. Nxd3 Qxe3+ 27.
Nf2 *
Position (FEN): 1r4k1/R1p2pp1/2p1p2p/3pP3/1P1P4/2P1q3/1Q3NPP/6K1 b - - 1 27
Black to move.
Themes:  Endgame Mate in 1 
Puzzle rating: 597
Best move: Qe1#