Correct answer: Qb51...N:f4[a] 2.Q:f4# 1...Ng7/Nf6/[б]/ 2.Rf6# 1...Bd6/Ba7 2.N:d6# 1...Re7 2.N:e7#[A] 1...Rd5/Rc5/Rb5/Ra5 2.Ne7#[A]/e4#[Б