Correct answer: Qf51...Nf6[a] 2.Qc5#[A] 1...Nd6 2.Qg5#[Б] 1.Rd8? zz 1...Nf6[a] 2.Qd6#[C] 1...Ng7/[б]//Nd6/Nc7[c] 2.Qg5#[Б] 1...K:d8 2.e7# but