Correct answer: Nc71...Kc8 2.Qe8# 1.Ka6?? zz 1...Kc8 2.Qe8# but 1...Kd8! 1.Ka7?? zz 1...Kc8 2.Qe8# but 1...Kd8! 1.Nd4?? zz 1...Kd6 2
