Solution
1.Крb5-a5 ! цугцванг.
1...d7-d6
2.Крa5-a6 угроза:
3.Фb6-b7 #
2...Лc8-c6
3.Фb6*c6 #
2...Лc8-c7
3.Фb6-b8 #
2...Лc8-b8
3.Фb6*b8 #
1...Лc8-c1
2.Фb6-b8 #
1...Лc8-c2
2.Фb6-b8 #
1...Лc8-c3
2.Фb6-b8 #
1...Лc8-c4
2.Фb6-b8 #
1...Лc8-c5 +
2.d4*c5 угроза:
3.Фb6-b8 #
1...Лc8-c6
2.Фb6-b8 #
1...Лc8-c7
2.Фb6-b8 #
1...Лc8-b8
2.Фb6*b8 #
1...Лc8-h8
2.Сa7-b8 угроза:
3.Фb6-a7 #
2...Лh8*b8
3.Фb6-a6 #
1...Лc8-g8
2.Сa7-b8 угроза:
3.Фb6-a7 #
2...Лg8*b8
3.Фb6-a6 #
1...Лc8-f8
2.Сa7-b8 угроза:
3.Фb6-a7 #
2...Лf8*b8
3.Фb6-a6 #
1...Лc8-e8
2.Сa7-b8 угроза:
3.Фb6-a7 #
2...Лe8*b8
3.Фb6-a6 #
1...Лc8-d8
2.Сa7-b8 угроза:
3.Фb6-a7 #
2...Лd8*b8
3.Фb6-a6 #
2.Крa5-a6 угроза:
3.Фb6*d8 #
3.Фb6-b7 #
2...Лd8-b8
3.Фb6*b8 #
2...Лd8-c8
3.Фb6-b7 #
2...Лd8-h8
3.Фb6-b7 #
2...Лd8-g8
3.Фb6-b7 #
2...Лd8-f8
3.Фb6-b7 #
2...Лd8-e8
3.Фb6-b7 #