Correct answer: Nb31...b3 2.Q:c3#/R:c3# 1.Nef5? (2.Nd6#[A]) but 1...B:b5! 1.Nd5? (2.Nb6#[Б]) but 1...B:b5! 1.Nc8? (2.Nd6#[A]/Nb6#[Б]) but 1...B:b