Correct answer: N:f51...B:e7 2.Q:e7#[A] 1...Bf3/Bg2/Bh1 2.Q:f5#[Б] 1...Bd3/Bc2/Bb1 2.B:d5# 1...N:d4/Nb4/Na5/Na7 2.d8N#[C] 1...N:e7