Correct answer: Nf71...Kh8 2.Qf6# 1.Ke3?? zz 1...Kh8 2.Qf6# but 1...e4! 1.Kf3?? zz 1...Kh8 2.Qf6# but 1...e4+! 1.Kf5?? zz 1...Kh8 2.Qf6#
