Correct answer: Ke81...K:f4 2.Bc7# 1.Kd7?? zz 1...K:f4 2.Bc7# but 1...Kf6! 1.Kf7?? zz 1...K:f4 2.Bc7# but 1...Kd6! 1.Kf8?? zz 1...K:
