Solution:
1...Rb3[a]/Rb6/Rb7/Rb8/Bxd3[b]/Bd5/Ba6 2.Qd5#[A]
1...Rb5/Bb3[c]/Ba2 2.Nxb5#[B]
1...Bf6/Be7/Bd8 2.Qg1#
1...Rxb2 2.Bxb2#
1...Bb5 2.Nxb5#[B]/Qd5#[A]
1.Qh7? (2.c3#)
1...Rb3[a] 2.Qd7#[E]
1...Bb3[c] 2.Qa7#[D]
1...Nxc2 2.Nxc2#
1...Ne4/Nb1 2.Qxe4#
1...Rxb2 2.Bxb2#
but 1...Bxd3[b]!
6 tries skipped1.Rxb4?? (2.Nb5#[B]/Qd5#[A])
1...Nxc2 2.Qd5#[A]
but 1...axb4!
1.Qxg5?? (2.Qg1#/Qe3#)
1...Bxd3[b] 2.Qe3#/c3#
1...Rxb2 2.Bxb2#
1...Ne4 2.Be3#/Qe3#
1...Nf1 2.Qg4#/Qh4#/Qf4#
1...Nf3 2.Be3#/Qg4#/Qf4#/Qe3#
but 1...Nxc2!
1.Qd8+??
1...Bd5 2.Qxd5#[A]/Qb6#[C]
but 1...Bxd8!
1.Qxc4+??
1...Rxc4 2.Nb5#[B]
but 1...Nxc4!
1.Nb5+[B]??
1...Bxb5 2.Qd5#[A]
but 1...Rxb5!
1.Nxc4?? (2.Qd5#[A])
1...Rxb2 2.Bxb2#
but 1...Rb5!
1.Qg6! (2.c3#)
1...Bxd3[b]/Rb3[a] 2.Qd6#[F]
1...Bb3[c] 2.Qb6#[C]
1...Ne4/Nb1 2.Qxe4#
1...Nxc2 2.Nxc2#
1...Rxb2 2.Bxb2#