Correct answer: Qb31...Kc5 2.Qd5# 1.Kf5?? zz 1...Kc5 2.Qd5# but 1...f6! 1.K:f7?? zz 1...Kc5 2.Qd5# but 1...Ke5! 1.Qd3+?? 1...Kc5 2.Q
