Шахматная задача №20
Поставить мат в 3 хода
№11 5 bka1 wbh2 wka3 wna2№12 5 bkb8 wbh3 wkb6 wnd1№13 2 bkg2 wkg5 wqb1 wrd8№14 2 bke2 wkf5 wqh8 wrh1№15 2 bka3 wkd3 wqh4№16 2 bkh5 bpf7 bph4 wkf6 wqh3№17 2 bbb2 bka2 bpa3 wbf4 wkc2 wqb4№18 2 bke5 bpf6 bpg5 wke7 wpd2 wqb4№19 2 bke3 wbc5 wke6 wnd4 wqc2№20 3 bke8 wke4 wqa7