A very tricky one no comments

White to move. How should White proceed?
Kubbel, 1984, presented by Andreas
8/6pp/6P1/p5P1/k1p5/5p2/1PK1P3/5B1b w - - 0 1
Chess news from Susan Polgar
Source: Susan Polgar Blog

White to move. How should White proceed?
Kubbel, 1984, presented by Andreas
8/6pp/6P1/p5P1/k1p5/5p2/1PK1P3/5B1b w - - 0 1
Source: Susan Polgar Blog