Correct answer: Nd41...K:e4/K:c4 2.Qd5# 1.Qg5?? zz 1...K:e4/K:c4 2.Qd5# but 1...K:e2! 1.Qf5?? zz 1...K:c4 2.Qd5# but 1...K:e2! 1.Q