My opponent Leif Pressman has just played 42.Rh4+. In a mutual time scramble, I erred with 42...Kg5. Luckily for me, White blundered in return with 43.Rh3, allowing 43...Kh6. Instead, he could have won with 43.h6.
The correct move for Black in the diagram is 42...Kf3 with the winning continuation 43.Rh3+ Ke4 44.h6 Kd3 45.Kf1 Rf2+ 46.Kg1 Rf8 47.h7 Rh8 48.Kf1 Kd2 49.Rh2+ Kd1.