a) diagram
1.Rd6-c6 Sb6-c8
2.Rc6-c5 Sc8-e7
3.Kd4*c4 Se7-c6[+wSa3] #
1.Rd6-e6 Kc2-d1
2.Re6-e4 Sb6*d5
3.Kd4-d3[+bPd4] Sc4-b2 #
b) wKc2-->g4
1.Kd4-d3 Sc4*d6
2.d5-d4[+bRd5] Sd6-e4
3.Kd3*e4 Sb6-c4[+wSf2] #
1.Rd6*b6 Kg4-g5[+wSb7]
2.Rb6-d6 Sc4-e5
3.Kd4*e5 Sb7-c5[+wSf3] #