Correct answer: Qf31...f5 2.Qf7# 1.Kf8?? zz 1...Kd7 2.Qe8# 1...f5 2.Qf7# but 1...a5! 1.Bg3?? zz 1...f5 2.Qf7# but 1...a5! 1.Bf4?? zz 1...f5 2.Qf7#
