Correct answer: Qb21...Nb3/Nb7/Nc4/Nc6 2.Nc4# 1.Nf6?? (2.Nd7#) but 1...K:f6! 1.Qb4?? (2.Qd4#/Qe4#) 1...Nb3/Nc6 2.Nc4#/Qe4#
