Correct answer: Bc71...f5 2.Bd5# 1...Bd6/Bc7/Bb8 2.N:f6# 1.Be7?? zz 1...f5 2.Bd5# 1...Bd6/Bc7/Bb8 2.N:f6# but 1...B:d4! 1.Bb6?? zz
