1.Kc8!
Threatening to advance the a-pawn. [After 1.a6?
Kc6
2.Ke7
h5
black wins]
1...Kc6
2.Kb8!
[After 2.a6?
Kb6
3.Kd7
h5
black wins]
2...Kb5
3.Kb7!
Kxa5
4.Kc6
h5
5.Kd5
the white king is in the square and catches the black pawn. Draw. 1/2-1/2