Correct answer: Nc21...c6/c5 2.Nb6# 1...f6 2.Qe6# 1...f5 2.Nf6#/Qe6# 1...Rf6/Rg3/Rh3 2.N:f6# 1.N:f3?? (2.Nf6#) but 1...Bc4! 1.Nc6?? (2.Nb4#)
