Correct answer: Rb81...Nb6 2.R:c7# 1...Nd5/Ne6/Ne8/Na6 2.R:b5# 1...f4 2.Ne4# 1...b4 2.a:b4# 1.Rb6?? (2.Rc6#) 1...N:b6 2.Ndb7# but 1...K:b6!
