Correct answer: Nf71...Kh4 2.Qf4# 1.Qf5+?? 1...Kh4 2.Qf4# but 1...K:f5! 1.Nh3?? (2.Qf4#) but 1...h4! 1.Nh7?? zz 1...Kh4 2.Qf4# 1...N
