Correct answer: Rc51...K:e4 2.Qh4# 1.Qf7?? (2.Q:c4#) but 1...K:e4! 1.Qe6?? (2.Q:c4#) but 1...K:e4! 1.Qd8+?? 1...K:e4 2.Qh4# but 1...Kc3!