Correct answer: Qg11.Qh5+?? 1...Kb4/Kc4/Kc6 2.Qc5# 1...Ka6 2.Qa5# but 1...Kb6! 1.Qd5+?? 1...Kb4 2.Qc5#/Qb3# 1...Ka6 2.Qa5#