Correct answer: Kg41...c2 2.Qf3# 1.Nd5?? zz 1...c2 2.Qf1# but 1...Kc4! 1.Na4?? zz 1...c2 2.Qf1# but 1...Kc4! 1.Kf5?? zz 1...c2 2.Qf3# but 1...Ke