Correct answer: Qb71.Qb3?? zz 1...Kf4/Kg4/g6 2.Qf3# 1...Kf6/Kg6 2.Q:f7# but 1...f6! 1.Qf4+?? 1...Kg6 2.Q:f7# but 1...K:f4! 1.Qb7! zz
