King and Pawn Endings, Part Five

Here is a very difficult but extremely interesting (dare I say "cool"? Why not; I was born in the '60s) king and pawn ending for those of you who want a bit of a workout.



From the game Laveryd-Wikstrom, Umea 1997, Black to play. What's the solution?

As usual, the answer will be provided in a few days.