Chess puzzle (Checkmate)
Moves: 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nd4 4. Nxd4 exd4 5. O-O Bc5 6. c3 d6 7. cxd4 Bxd4 8.
d3 Ne7 9. Nc3 c6 10. Be3 Bxc3 11. bxc3 d5 12. exd5 cxd5 13. Bb5+ Bd7 14. Qa4
Nc6 15. Bc5 Qc7 16. Rfe1+ Kd8 17. Qh4+ f6 18. Bxc6 Qxc6 19. Be7+ Kc8 20. c4 d4
21. Qxd4 h5 22. Rac1 h4 23. Qd5 h3 24. Qxc6+ Bxc6 25. g3 Kd7 26. d4 Bg2 27. d5
f5 28. d6 f4 29. c5 fxg3 30. fxg3 Rh5 31. Bh4 g5 32. Re7+ Kc6 33. Rc7+ Kd5 34.
Rd1+ Kc4 35. d7 gxh4 36. gxh4 Rg8 37. d8=Q Rxd8 38. Rxd8 Rxh4 39. Rg7 Rf4 40.
Rd1 Bf3 41. Rc1+ Kd3 42. Rd7+ Ke2 43. c6 *
Position (FEN): 8/pp1R4/2P5/8/5r2/5b1p/P3k2P/2R3K1 b - - 0 43
Black to move.
Themes:  Endgame Mate in 1 
Puzzle rating: 871
Best move: Rg4#