Correct answer: Ba31...Kd4 2.Bb2# 1.Nf7+?? 1...Kd4 2.Bb2# but 1...Kf6! 1.Kc5?? (2.Qb2#) but 1...Kf6! 1.Q:e4+?? 1...Kf6 2.Bb2#/Nh5#
