Solution:
1...Qxd6[a] 2.Qxc3#[A]
1...Nxf5[b] 2.Ng4#[B]
1...Nxd5[c] 2.Nxd7#[C]
1...Kf6 2.Bd4#
2 tries skipped1.Nc4+[D]??
1...Kf6 2.Bd4#
but 1...Kxd5!
1.f4+??
1...Ke4 2.Qc4#
1...Kf6 2.Bd4#
but 1...gxf4!
1.Qxd7! (2.Ng4#[B]/Qe7#/Qe6#)
1...Qxd6[a] 2.Ng4#[B]
1...Nxf5[b]/Nxd5[c]/Qa7 2.Ng4#[B]/Qe6#
1...Kf6 2.Ng4#[B]/Qe7#/Bd4#
1...Qa4/Qb4 2.Qe7#/Qe6#
1.Qd8! (2.Qe7#)
1...Qxd6[a] 2.d4#[F]
1...Kxd6/Nxf5[b] 2.Nf7#[E]
1...Nxd5[c] 2.Nc4#[D]