Solution:
1...Naxc5[a] 2.a4#[A]
1...Ndxc5[b] 2.Be8#[B]
1...Qf2/Qf3/Qf4/Qxf5/Qe1/Qd1/Qb1/Qa1/Qg1/Qh1/Qg2/Qh3/Qc4 2.Bc4#
3 tries skipped1.Nd5?? (2.Nc7#)
1...Nxb2 2.Nc3#
but 1...Bxd6!
1.Qc4+??
1...Kc6 2.Bd5#/b5#
but 1...Qxc4!
1.Qd3+??
1...Kc6 2.Bd5#/b5#
but 1...Qxd3!
1.Qb7! (2.Qxd7#)
1...Naxc5[a] 2.Nxd7#[D]
1...Ne5/Nf6/Nf8/Ndxc5[b]/Nb8 2.N6xa4#[C]
1...Ndxb6[c] 2.Be8#[B]
1...Naxb6[d] 2.a4#[A]
1...Qf3/Qxf5/Qh1/Qg2 2.Bc4#