King and pawn ending.
White to move
1.Kh6
Kg8
2.h4!
and it is clear that the lever h5 will win for White.
2...b6
3.h5
Kf7
4.Kxh7
gxh5
5.g3
b5
6.Kh6
f4
7.Kxh5
fxg3
8.fxg3
b4
9.Kh6
c5
10.g4
a5
11.g5
a4
12.Kh7
c4
13.g6+
Ke7
14.g7
b3
15.axb3
c3
16.bxc3
a3
17.g8Q
a2
18.Qg7+
Ke6
19.Qa7
Kf6
20.Qxa2
1-0