1.Ra8+
Nxa8
[1...Kxa8
2.Kxc7
Ka7
3.Kc6
Ka8
4.Kxb6
Kb8
5.Kc6
Kc8
(5...Ka7
6.b6+
Kb8
7.b7
Ka7
8.Kc7
) 6.b6
Kb8
7.b7
Ka7
8.Kc7
]
2.Kc8
Nc7
Black's only legal move!
3.Kxc7
Ka8
4.Kxb6
Kb8
5.Kc6
Kc8
6.b6
Kb8
7.b7
Ka7
8.Kc7
*