Correct answer: Nb51...Nf7[a] 2.N:g6#[A] 1...Rc4/Bb4/[б]/ 2.N:c4#[Б] 1...e:d5 2.Q:d5# 1.N:e4? (2.Qd6#) 1...Nf7[a] 2.f4#[D] 1...Bb4/[б]/ 2.d4#[E] 1...B