Correct answer: Nc51...Kb7 2.Bd5# 1.Rd8?? (2.Bd5#) but 1...Kb7! 1.Ng3?? zz 1...Kb7 2.Bd5# but 1...Kd6! 1.Ng7?? zz 1...Kb7 2.Bd5# but 1.
