Correct answer: Qa11...Kc5 2.Qa5# 1...Ke4 2.Q:c6# 1.Kf5?? zz 1...Kc5 2.Qa5# but 1...f6! 1.b4?? zz 1...Ke4 2.Q:c6# but 1...Kc4! 1.g4?? zz 1...