Correct answer: Qb21...K:d5 2.Qb5# 1.Qb3?? (2.Qc4#) but 1...b5! 1.Qb4+?? 1...K:d5 2.Qb5# but 1...K:b4! 1.Q:b6+?? 1...K:d5 2.Qb5# but 1...K<