33-28 is also winning
remove the pawns 6 and 47 and it'll be good.
otherwise, put 48 to 43 and 40 to 35 and the only win is 33-28
Interesting. Yes, it seems to be winning, but it is clearly less good in the following line:
33-28 14-19 27-22 19x30 18x19 13x33 22x4 17-22!
In the lines that follow, white can not prevent losing the king with only one piece up, while in the puzzle solution, this is not the case.