Correct answer: Nb31...c3 2.N:d3#[A] 1...Nd6/Rd6 2.Q:g7# 1...Bf3 2.N:f3# 1...Bg4 2.N:g4#[Б] 1...Bc2/Bb3/Ba4 2.Ng4#[Б]/Nf3# 1...d6 2.Q:e6#/Q