Correct answer: Qa81...Nb3/Nc4/Nc6 2.Q:b7# 1...b6/b5 2.Q:b6# 1.Bb6?? (2.Qa7#) 1...Nc6 2.Q:b7# but 1...K:b6! 1.Rd5?? zz 1...b6/b5 2.Q:b6#
