Correct answer: Nd71...Nc4[a] 2.Qf4#/Rd4#[A] 1...Qd5/Nc8/N:b5/Nb7/[б]/ 2.Qf4# 1...Nf7 2.Qf4#/Qg6# 1...Nf3/Ng2/Nd3/N:c2 2.Q:f3#