a) diagram
1.Sb5-c3 Kc5-b4 2.Sc3-a2+ Kb4-a4
3.Se5-c6 Rc4-c1 4.Sa2*c1(Ra2)(wrRa6)+ Ka4-b5#
b) wKa6-->a7
1.Sb5-c7 Rc4-c2 2.Se5-c4 Kc5-b4
3.Sc4-a3 Kb4-a5 4.Sa3*c2(Ra3)(wrRa7)+ Ka5-b6#
c) wKa6-->a8
1.Sb5-a7 Kc5-b6 2.Se5*c4(Re5)(wrRa8)+ Kb6-a6
3.Sc4-a3 Re5-a5 4.Sa7-c8+ Ka6-b7#
d) bKc5-->c8
1.Ka6-a7 Rc4-c7+ 2.Sb5*c7(Rb5)(wrRa7) Rb5-d5
3.Sc7-a6 Rd5-d8 4.wrRa7-a8+ Kc8-b7#