Correct answer: Qh61...f4 2.Nc4#[A] 1...Bd6 2.Nd3#[Б] 1...Nb1/Nb5/Na2/Na4 2.Qe1# 1.Rbd4? (2.Nc4#[A]) but 1...Ne4[a]! 1.Rdd4? (2.Nd3#[Б]) but
