Ответ
1.Крg4-f5 ! цугцванг.
1...Сb8-f4
2.h7-h8=Ф +
2...Сf4-b8
3.Фh8-h1 #
1...Сb8-h2
2.h7-h8=Ф +
2...Сh2-b8
3.Фh8-h1 #
1...Сb8-g3
2.h7-h8=Ф +
2...Сg3-b8
3.Фh8-h1 #
1...Сb8-e5
2.h7-h8=Ф +
2...Сe5*h8
3.f7-f8=Ф #
3.f7-f8=Л #
2...Сe5-b8
3.Фh8-h1 #
1...Сb8-d6
2.h7-h8=Ф +
2...Сd6-f8
3.Фh8*f8 #
2...Сd6-b8
3.Фh8-h1 #
1...Сb8-c7
2.h7-h8=Ф +
2...Сc7-d8
3.Фh8*d8 #
2...Сc7-b8
3.Фh8-h1 #