Chess puzzle (Checkmate)
Moves: 1. d4 Nf6 2. Bf4 d5 3. e3 Nc6 4. Nd2 e6 5. Ngf3 Bd6 6. Bg5 h6 7. Bh4 g5 8. Bg3
Nh7 9. Bb5 Bd7 10. Bd3 f5 11. c4 Bxg3 12. hxg3 Nf6 13. cxd5 Nxd5 14. Qb3 Na5
15. Qa3 b6 16. Ne5 Qe7 17. Qxe7+ Kxe7 18. Ng6+ Kf6 19. Nxh8 Rxh8 20. a3 Nb7 21.
O-O f4 22. gxf4 gxf4 23. e4 Ne7 24. e5+ Kf7 25. Rac1 Nd5 26. Be4 c5 27. Bxd5
exd5 28. dxc5 Nxc5 29. Rfd1 h5 30. Nf3 h4 31. Rxd5 Bc6 32. Rd6 Ba8 33. Ng5+ Ke7
34. Rcd1 Rg8 35. b4 Rxg5 36. bxc5 Rxg2+ 37. Kf1 Bf3 38. c6 h3 39. c7 h2 40. Rh6
*
Position (FEN): 8/p1P1k3/1p5R/4P3/5p2/P4b2/5Prp/3R1K2 b - - 1 40
Black to move.
Themes:  Endgame Mate in 1 
Puzzle rating: 1219
Best move: Rg1#