Correct answer: Rg51.b6[A]? zz 1...f4[a] 2.Rg5#[Б] but 1...Kb5! 1.Rf6?? zz 1...K:b5 2.R:f5# but 1...f4[a]! 1.Re6?? zz 1...K:b5 2.Re5# but 1...f4[a]! 1.R