Correct answer: Qa61...Nc3[a] 2.Q:c5#[A] 1...Nd4/[б]/ 2.R:d4#[Б] 1...Nd6[c] 2.Nb4#[C] 1...c4 2.Rd4#[Б]/Be4#[D] 1.Qa6! (2.Qb7#) 1...Nc3[a] 2.Qc4#