Chess puzzle (Checkmate)
Moves: 1. d4 Nf6 2. c4 e6 3. g3 c5 4. d5 exd5 5. cxd5 d6 6. Nc3 g6 7. Nf3 Bg7 8. Bg2
O-O 9. O-O Re8 10. Bf4 Bg4 11. Nd2 Nh5 12. Be3 Qd7 13. Nc4 b5 14. Nxb5 Qxb5 15.
Nxd6 Qd7 16. Nxe8 Qxe8 17. Bxc5 Nd7 18. f3 Nxc5 19. fxg4 Nf6 20. Qd4 Nfe4 21.
Qc4 Rc8 22. Rac1 Bxb2 23. Rc2 Nd6 24. Qb4 Qe3+ 25. Kh1 Bd4 26. Rf3 *
Position (FEN): 2r3k1/p4p1p/3n2p1/2nP4/1Q1b2P1/4qRP1/P1R1P1BP/7K b - - 7 26
Black to move.
Themes:  Middlegame Mate in 1 
Puzzle rating: 811
Best move: Qg1#