Correct answer: Nd61.Nd2?? zz 1...Kd4 2.Bf2# 1...d6 2.Bf2#/Qc4# 1...d5 2.Qb6# but 1...Kd6! 1.Ne3?? (2.Qb4#/Qb6#/Qd5#) 1...Kd6 2.Bb4#
