1.Kf4+!
[1.Kf3+?
Kf1
2.Re1+
Kxe1
3.Kxg2
Ke2-+
] 1...Kd2
2.Rd8+
Kc2
3.Rc8+
Kb2
4.Rb8+
Ka2
5.Ra8+
Kb1
6.Rb8+
Kc1
7.Rc8+
Kd1
8.Rd8+
Ke1
9.Re8+
Kf1!
[9...Kf2
10.Ra8
g1Q
11.Ra2+=
] 10.Rd8!
Re7
[main 10...g1Q
11.Rd1+
Kg2
12.Rxg1+
Kxg1
13.g4
Kg2
14.g5
Kh3
15.Ng4!
zz 15...Kh4
(15...h5
16.gxh6=
) 16.Nf6!
zz 16...Rb7
17.Kf5
Ra7
18.Nxh7
(18.Kf4?
Rg7!
zz 19.Kf5
Rxg5+-+
) 18...Rxh7
19.g6
Ra7
20.Kf6
Ra6+
21.Kf7
Kg5
22.g7+-
] 11.Rd1+
Re1
12.Rd2
g1Q
13.Ng4
Re2
14.Rd1+
Re1
15.Rd2
Qh1
16.Nh2+
Kg1
17.Nf3+
Kf1
18.Nh2+=.