Correct answer: Kb41...K:e4 2.Qf5# 1.K:b6?? zz 1...K:e4 2.Qf5# but 1...Kc4! 1.Ka4?? zz 1...K:e4 2.Qf5# 1...Kc4 2.Qd4# but 1...b5+! 1.Q