Correct answer: Rb21...f4[a] 2.Ng4#[A] 1...d2/[б]/ 2.Re2#[Б] 1...Nf4/Ne1[c] 2.Q:f4#[C] 1.Kg1? zz 1...f4[a] 2.Ng4#[A] 1...Nf4/Ne1[c] 2.Q:f4#[C] but 1...d2/[б]/!