Correct answer: Nf51...Ke4[a] 2.Bf3#[A] 1...Kc4/[б]/ 2.Bb3#[Б] 1.a5? zz 1...Ke4[a] 2.Bf3#[A] 1...Kc4/[б]/ 2.Bb3#[Б] but 1...b:a5! 1.e6? zz 1...Ke4[a] 2.B