Correct answer: Qb31...Ke6[a] 2.Qe8#[A] 1...Kd4/[б]//f4 2.Nc6#[Б] 1.Bf1? zz 1...Ke6[a] 2.Qe8#[A] 1...Kd4/[б]/ 2.Nc6#[Б] but 1...f4! 1.Nd7+?? 1...K