Correct answer: Na41...Kf5 2.Q:h7# 1...f5 2.d6# 1.Qb5?? zz 1...f5 2.Q:c4# but 1...Kf5! 1.Qc7?? zz 1...Kf5 2.Q:h7# 1...f5 2.Q:c4# but 1...K:d5! 1
