Chess puzzle (Checkmate)
Moves: 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Nf3 b6 6. Bd2 Bb7 7. Be2 d6 8. O-O
Nbd7 9. a3 Bxc3 10. Bxc3 Ne4 11. Be1 f5 12. Nd2 Qe7 13. f3 Nxd2 14. Qxd2 e5 15.
d5 f4 16. e4 Kh8 17. b4 g5 18. g3 Rf6 19. gxf4 gxf4 20. Kh1 Rg6 21. Bf2 Rag8
22. Rg1 Nf6 23. Rxg6 hxg6 24. Rg1 Bc8 25. Bh4 Qf7 26. c5 Bh3 27. cxd6 cxd6 28.
Bf1 Bxf1 29. Rxf1 g5 30. Be1 g4 31. Qf2 gxf3 32. Qh4+ Nh7 33. Qh3 Qg6 34. Qxf3
Ng5 35. Qg4 Qxe4+ 36. Qg2 f3 37. Qf2 Nh3 38. Qxf3 Qxf3+ 39. Rxf3 *
Position (FEN): 6rk/p7/1p1p4/3Pp3/1P6/P4R1n/7P/4B2K b - - 0 39
Black to move.
Themes:  Endgame Mate in 1 
Puzzle rating: 546
Best move: Rg1#