Correct answer: Ra41...c2 2.Kb4# 1.Ne7?? zz 1...c2 2.Kb4# but 1...K:e3! 1.Nf6?? zz 1...c2 2.Kb4# but 1...K:e3! 1.Nc7?? zz 1...c2 2.Kb4# but 1...K