Correct answer: Rf81...Ra5/Raa6/Ra7/Ra8/Rc4+ 2.Nc4# 1...Rb5/Rbb4/Rc6+ 2.Nc6# 1.Rc6? (2.Qf6#[A]) 1...Rc4+ 2.N:c4# 1...R:c6+ 2.