Correct answer: Bb31...Qb2 2.Q:b2# 1...Qb3 2.Q:b3# 1...Qa1 2.Qc5#/Qb3# 1...Qc1 2.Q:c1#/Qb3# 1...Qd1 2.Qc5#/Qb2# 1...Q:e1 2.Qb2#/Q