Correct answer: Na21...Nf7/Ng4/Nd3[a]/Nd7 2.Nd3#/Qd4#[A] 1...Nf3/Nc4/[б]//Rd3 2.Nd3# 1...Be2/Bf3/Bg4/B:h5 2.N:b3# 1...Rg5/Rg4