答え
1.Кa2-c3 ! угроза:
2.Кc3-b5 цугцванг.
2...Сb8-d6
3.Лa8*a7 #
2...Сb8-h2
3.Лa8*a7 #
2...Сb8-g3
3.Лa8*a7 #
2...Сb8-f4
3.Лa8*a7 #
2...Сb8-e5
3.Лa8*a7 #
2...Сb8-c7
3.Лa8*a7 #
3.Кb5*c7 #
1...Сb8-h2
2.Кc3-b5 угроза:
3.Лa8*a7 #
2...Сh2-g1
3.Кb5-c7 #
2...Сh2-b8
3.Лa8*a7 +
3...Сb8*a7
4.Кb5-c7 #
1...Сb8-g3
2.Кc3-b5 угроза:
3.Лa8*a7 #
2...Сg3-f2
3.Кb5-c7 #
2...Сg3-b8
3.Лa8*a7 +
3...Сb8*a7
4.Кb5-c7 #
1...Сb8-f4
2.Кc3-b5 угроза:
3.Лa8*a7 #
2...Сf4-e3
3.Кb5-c7 #
2...Сf4-b8
3.Лa8*a7 +
3...Сb8*a7
4.Кb5-c7 #
1...Сb8-e5
2.Кc3-b5 угроза:
3.Лa8*a7 #
2...Сe5-d4
3.Кb5-c7 #
2...Сe5-b8
3.Лa8*a7 +
3...Сb8*a7
4.Кb5-c7 #
1...Сb8-d6
2.Кc3-b5 угроза:
3.Лa8*a7 #
2...Сd6-c5
3.Кb5-c7 #
2...Сd6-b8
3.Лa8*a7 +
3...Сb8*a7
4.Кb5-c7 #
1...Сb8-c7
2.Кc3-b5 угроза:
3.Лa8*a7 #
3.Кb5*c7 #
2...Сc7-a5
3.Лa8*a7 #
2...Сc7-b6
3.Лa8*a7 +
3...Сb6*a7
4.Кb5-c7 #
2...Сc7-h2
3.Лa8*a7 #
2...Сc7-g3
3.Лa8*a7 #
2...Сc7-f4
3.Лa8*a7 #
2...Сc7-e5
3.Лa8*a7 #
2...Сc7-d6
3.Лa8*a7 #
2...Сc7-d8
3.Лa8*a7 #
2...Сc7-b8
3.Лa8*a7 +
3...Сb8*a7
4.Кb5-c7 #