Correct answer: Qh11...d4 2.Qe4# 1.f4+?? 1...Kd4 2.Qd2# but 1...Kf5! 1.Qh3?? zz 1...f5 2.Qh8# 1...d4 2.Qe6# but 1...Kd4! 1.Qf3?? (2.Qf4#) 1..
