Correct answer: Qe11...Ke6/f4 2.Q:f6# 1...f:e4 2.Q:e4# 1.Kc4?? zz 1...Ke6/f4 2.Q:f6# but 1...f:e4! 1.Qh5?? zz 1...Ke6 2.Qe8# but 1...Kf4! 1.Qh