Solution:
1...Be2[a]/Bd1[a] 2.Rxd4#[A]
1...Bxe4[b] 2.Bc4#[B]
2 tries skipped1.Qf6?? (2.Qxa6#)
1...Be2[a]/Bd1[a] 2.Rxd4#[A]
but 1...Bxe4[b]!
1.Bxf2[C]?? (2.Rxd4#[A])
but 1...Bxf2!
1.Qg6! (2.Qxa6#)
1...Be2+[a]/Bd1+[a] 2.Rf4#[D]
1...Bxe4+[b] 2.Bxf2#[C]
1.Rxd4+[A]!
1...Kxe3 2.Nc2#