Correct answer: Bc51...c:d6 2.Nb6#[A] 1...a5 2.Bb5# 1...Ne1/Ne5/Nf2/Nc1/Nc5/Nb2/Nb4 2.Ne5#[Б] 1...f3 2.Ne3# 1...Nh5/Nf5/Ne8 2.Q:e6#[C]