1.Kh8!
[Thematic try 1.Kh7?
Rxd6
2.Rb5+
(2.g8Q?
Rh6#
) 2...Kh4
3.Rb4+
Kh5
4.Rb5+
Kh4
positional draw, or 5.g8Q
Rd7+!
(not 5...Rxg8?
6.Kxg8
Ra6
7.Kf7+-
) 6.Kh8
Rxg8+
7.Kxg8
Ra7!
(not 7...Re7?
8.a4
Rxe2
9.a5+-
) 8.Rb4+
Kg5!
(not 8...Kh5?
9.a4
Kg6
10.Kf8
Kf6
11.Ke8
Ra8+
12.Kd7+-
) ] 1...Rxd6
2.g8Q
[2.Rb5+?
Kh6
(2...Kh4?
3.g8Q
Rxg8+
4.Kxg8+-
) 3.g8Q
Rxg8+
4.Kxg8
Kg6=
] 2...Rxg8+
3.Kxg8
Kg6
4.Kf8
Kf6
5.Ke8
main B 5...Ke6
[main A 5...Ra6
6.Ra2!
Ke6
7.Kd8
Kd6
8.Rd2+!
Kc5
9.Rd3!
Re6
10.Rc3+
Kd4
11.Rc2
Ra6
12.Ra2!
Ra7
13.Kc8
Kc5
14.Kb8
Re7
15.a4+-
] 6.Rb3!
Rd2
7.e3!
[7.e4
Rd6
] 7...Rd6
[7...Rh2
8.Kd8
Rh8+
9.Kc7+-
] 8.Rc3!
zz btm 8...Ra6
9.Kd8
Ra7
[9...Kd6
10.Rd3++-
] 10.Rd3!
Ke5
11.Kc8
Ke4
12.Kb8+-.