Correct answer: B:b31...c3[a] 2.N:b3#[A] 1...e3/[б]/ 2.Nf3#[Б] 1.Bf3? zz 1...c3[a] 2.N:b3#[A] 1...e3/[б]/ 2.Rd5#[C] 1...e:f3 2.N:f3#[Б] but 1...b2! 1.Rc5? zz 1...c3[a]