a) diagram
1.Kd6-c6 Kc4-c3 2.Kc6-c5 Rf4*d4(Sf4)(brSc3) 3.Sf4-d5+ brSc3-a4+
4.Kc5*d4(Rc5)(wrRd4)+ Rc5-c4 #
b)bRf4-->e8
1.Sd3-e5+ Re8*e5(Se8)(brSc4)+ 2.Kd6-c6 Re5-d5 3.Se8-d6+ brSc4-a5+
4.Kc6*d5(Rc6)(wrRd5)+ Rc6-c5 #
c)bRf4-->c7
1.Sd3-c5 Rc7*c5(Sc7)+ 2.Kd6*c5(Rd6)(wrRc5)+ brSc4-b6 3.Sd4-b5 brSb6-c8
4.Sc7-d5+ Rd6-c6 #
d)bKc4-->f6
1.Sd4-f5 Rf4*f5(Sf4)(brSf6) 2.Sd3-e5 Rf5*e5(Sf5) 3.Sf4-d5+ brSf6-e8+
4.Kd6*e5(Rd6)(wrRe5)+ Rd6-e6 #
e)bKc4-->g3
1.Kd6-e5 Rf4*d4(Sf4)(brSg3) 2.Sf4-e6 brSg3-h5 3.Sd3-f2 Rd4-e4+
4.Sf2*e4(Rf2)(wrRe5)+ Rf2-f5 #