Chess puzzle (Checkmate)
Moves: 1. d4 Nf6 2. c4 Nc6 3. Nc3 e5 4. d5 Ne7 5. e4 Ng6 6. Nf3 Bc5 7. Bd3 O-O 8. O-O
a5 9. h3 d6 10. Bg5 h6 11. Be3 Nd7 12. a3 Qe7 13. Qb1 Nf4 14. Na4 Bxe3 15. fxe3
Nxd3 16. Qxd3 b6 17. b4 axb4 18. axb4 Nf6 19. Qc2 Nh5 20. c5 b5 21. Nb2 Rxa1
22. Rxa1 f5 23. exf5 Bxf5 24. e4 Bg6 25. Ra7 Nf4 26. cxd6 Qxd6 27. Qxc7 Qxb4 *
Position (FEN): 5rk1/R1Q3p1/6bp/1p1Pp3/1q2Pn2/5N1P/1N4P1/6K1 w - - 0 28
White to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 797
Best move: Qxg7#