Solution
1.Лg7-f7 ! цугцванг.
1...Сg2-b7
2.Фf6-e7 угроза:
3.Фe7*b7 #
2...Сb7-a6
3.Фe7*a7 #
2...Сb7-h1
3.Фe7*a7 #
2...Сb7-g2
3.Фe7*a7 #
2...Сb7-f3
3.Фe7*a7 #
2...Сb7-e4
3.Фe7*a7 #
2...Сb7-d5
3.Фe7*a7 #
2...Сb7-c6
3.Фe7*a7 #
2...Сb7-c8
3.Фe7*a7 #
1...Сg2-f1
2.Фf6-e7 угроза:
3.Фe7*a7 #
3.Фe7-b7 #
2...Сf1-g2
3.Фe7*a7 #
2...Сa7-b8
3.Фe7-e4 #
3.Фe7-b7 #
2...Крa8-b8
3.Лf7-f8 #
3.Фe7-f8 #
3.Фe7-d8 #
3.Фe7-b7 #
3.Фe7-e8 #
2.Фf6-a1 угроза:
3.Фa1*a7 #
2...Крa8-b8
3.Фa1-h8 #
2.Фf6-d8 +
2...Сa7-b8
3.Фd8-d5 #
2.Фf6-f3 +
2...Крa8-b8
3.Фf3-b7 #
2.Фf6-c6 +
2...Крa8-b8
3.Лf7-f8 #
3.Фc6-e8 #
3.Фc6-b7 #
1...Сg2-h1
2.Фf6-h8 +
2...Сa7-b8
3.Фh8*h1 #
1...Сg2-h3
2.Фf6-f3 +
2...Крa8-b8
3.Фf3-b7 #
2.Фf6-c6 +
2...Крa8-b8
3.Фc6-b7 #
1...Сg2-c6
2.Фf6*c6 +
2...Крa8-b8
3.Фc6-b7 #
3.Лf7-f8 #
3.Фc6-e8 #
1...Сg2-d5
2.Фf6-d8 +
2...Сa7-b8
3.Фd8*d5 #
1...Сg2-e4
2.Фf6-e7 угроза:
3.Фe7*a7 #
2...Сe4-b7
3.Фe7*b7 #
2...Сa7-b8
3.Фe7*e4 #
2...Крa8-b8
3.Лf7-f8 #
3.Фe7-f8 #
3.Фe7-d8 #
3.Фe7-e8 #
1...Сg2-f3
2.Фf6*f3 +
2...Крa8-b8
3.Фf3-b7 #
1...Сa7-b8
2.Фf6-a1 +
2...Сb8-a7
3.Фa1*a7 #
1...Крa8-b8
2.Фf6-h8 #
2.Фf6-d8 #