Correct answer: Nf6+1...Ke6[a] 2.Qc8#[A] 1...Kc6/[б]/ 2.Qe8#[Б] 1.Nb6+?? 1...Ke6[a] 2.Qd6#[C]/Qe5# 1...Kc6/[б]/ 2.Qc8#[A] but 1...Ke7! 1.Nf6+!