Correct answer: Qg21...Kg7/f5 2.Q:f7# 1...f:g5+ 2.Q:g5# 1.Qd7?? zz 1...Kg7/f5 2.Q:f7# but 1...f:g5+! 1.Qe6?? zz 1...Kg7 2.Q:f7# but 1...f:e6! 1.Qc4??