Correct answer: Qc21...Kb4[a] 2.Q:c5#[A] 1...Nd1/[б]//Na4/[б]/ 2.Qf1#[Б] 1...Nd3[c] 2.Qd5#[C] 1.R:b2?? (2.Qf1#[Б]) but 1...B:b2! 1.Qd5+[C]?? 1...K