2 edits
Originally posted by ptoblerWhy 42.f4 in this line? Am I missing something? Perhaps, 42.c4 may be faster. 42.c4 Rd6 43.Re4 Nxf3 44. Nxf3 Rd3+ 45.Kb4 Rxf3 46.c5 Rf5 47.c6 a5+ 48.Ka4 Rc5 ... Maybe something like this holds the balance.
40...Ra6 41. f4 Rb6+
...surely White must have a better 41st move
40...Ra6 41. Re7 (...and there it is!) 41...Kg7 42. f4
42...Rb6+ 43. Kc2 a6 44. Nb3 Nf5 45. Ra7 Ne3+ 46. Kd3 Nd5 47. Nc5
47...Nxf4+ 48.Kc4 Nh3
Edit: Maybe 48.Kc4 (not allowing Rc5) may work better for white.
Second Edit: 48.Kc4 Rf1 49.Re3 Rc1+ 50.Rc3 1-0
... I like Ra5 better than Ra6 anyway though.