Correct answer: Qb11...Bb4 2.Qc2# 1.Nd2+?? 1...Bb4 2.Qc2# but 1...Nc4! 1.Nd6+?? 1...Nc4 2.Q:c4# but 1...Kb3! 1.Qb1! (2.Qb5#) 1...