Correct answer: Q:c31...Bb2[a] 2.Q:c2#[A] 1...Rb2/[б]/ 2.N:c3#[Б] 1.Bb5?? zz 1...Rb2/[б]/ 2.N:c3#[Б] but 1...Bb2[a]! 1.Bc6?? zz 1...Rb2/[б]/ 2.N:c3#[