Correct answer: Nc41...Kb8 2.b:a8Q#/b:a8R# 1.b:a8B+?? 1...Kb8 2.Rb7# but 1...Kd6! 1.b:c8B+?? 1...Kb8 2.Rb7# but 1...Kd6! 1.Nc4! (2.b:a8
