Solution:
1...Nh5[a]/Nf5[b]/Ne6[a]/Ne8[a] 2.Re6#[A]
1...f1Q+[c]/f1R+[c] 2.Nxf1#[B]
1...Nxc4/Nd1/Nd3/Na4 2.Rd3#
1...f1B 2.Nxf1#[B]/Qg1#
1...f1N 2.Nxf1#[B]/Qe2#/Qg1#
7 tries skipped1.Bc6?? zz
1...Nh5[a]/Nf5[b]/Ne6[a]/Ne8[a] 2.Re6#[A]
1...f1Q+[c]/f1R+[c] 2.Nxf1#[B]
1...Nxc4/Nd1/Nd3/Na4 2.Rd3#
1...f1B 2.Nxf1#[B]/Qg1#
1...f1N 2.Nxf1#[B]/Qe2#/Qg1#
but 1...d5!
1.Bb7?? zz
1...Nh5[a]/Nf5[b]/Ne6[a]/Ne8[a] 2.Re6#[A]
1...f1Q+[c]/f1R+[c] 2.Nxf1#[B]
1...Nxc4/Nd1/Nd3/Na4 2.Rd3#
1...f1B 2.Nxf1#[B]/Qg1#
1...f1N 2.Nxf1#[B]/Qe2#/Qg1#
but 1...d5!
1.Ba8?? zz
1...Nh5[a]/Nf5[b]/Ne6[a]/Ne8[a] 2.Re6#[A]
1...f1Q+[c]/f1R+[c] 2.Nxf1#[B]
1...Nxc4/Nd1/Nd3/Na4 2.Rd3#
1...f1B 2.Nxf1#[B]/Qg1#
1...f1N 2.Nxf1#[B]/Qe2#/Qg1#
but 1...d5!
1.Nf5+[C]??
1...Nxf5[b] 2.Re6#[A]
but 1...Ke2!
1.c5?? zz
1...Nh5[a]/Nf5[b]/Ne6[a]/Ne8[a] 2.Re6#[A]
1...f1Q+[c]/f1R+[c] 2.Nxf1#[B]
1...f1B 2.Nxf1#[B]/Qg1#
1...f1N 2.Nxf1#[B]/Qe2#/Qg1#
1...Nc4/Nd1/Nd3/Na4 2.Rd3#
but 1...dxc5!
1.Rd2?? (2.Nf1#[B]/Qxf2#/Re2#)
1...Nf5[b] 2.Nf1#[B]/Nxf5#[C]
1...f1Q+[c]/f1R+[c] 2.Nxf1#[B]
1...Nd1/Nd3 2.Nf1#[B]/Rd3#/Re2#
1...f1B 2.Nxf1#[B]/Qf2#/Qg1#
but 1...cxd2!
1.Qg2?? (2.Re4#[D])
1...f1Q+[c]/f1R+[c] 2.Nxf1#[B]
but 1...hxg2+!
1.Ng1! zz
1...Nh5[a]/Nf5[b]/Ne6[a]/Ne8[a] 2.Nf5#[C]
1...f1Q[c]/f1R[c]/f1B/f1N 2.Re4#[D]
1...Kxd4 2.Qxf2#
1...Nxc4/Nd1/Nd3/Na4 2.Rd3#
1...fxg1Q+/fxg1R+/fxg1B/fxg1N 2.Qxg1#
