Correct answer: Re71.Rb4? zz 1...K:c6[a] 2.Rd2#[A] 1...Kd5/[б]/ 2.Rg6#[Б] 1...Ke7 2.f8Q# but 1...Ke6! 1.f8R?? (2.Rf6#) but 1...K:c6[a]! 1.N