Correct answer: Nc51...K:a6 2.Qa7# 1.Qe5+?? 1...K:a6 2.Qb5#/Rb6# 1...K:b4 2.Qb5# but 1...Qc5! 1.Qc7+?? 1...K:a6 2.Qa7#/Qb6# but 1.
