Correct answer: Qe11...Kf5 2.Qc2#/Qd3# 1.Kb4?? zz 1...Kf5 2.Qc2#/Qd3# but 1...b5! 1.Ka4?? zz 1...Kf5 2.Qc2#/Qd3# but 1...b5+! 1.Ka6?? zz
