1. Bc6! It is important to block the black pawn in order to prevent the black king to get access to c7. 1... Kd8 2. Kf5 2. Kf7? Nc8 3. a8=Q or a8R with stalemate. 2. Ke5? Ke7! black takes the opposition which leads to a draw. 2... Ke7 3. Ke5! and white has the opposition.The goal for the white king is b7. 3... Kf7 4. Kd4 Ke6 5. Kc5 Ke7 6. Bf3 Kd7 7. Bg4+ Ke7 8. Kc6 Kd8 9. Kb7! and white wins as black is in Zugzwang. 1-0 [Kjell Persson]