Correct answer: Bb21...Kf4 2.Qg4# 1.Qd7?? zz 1...Kf4 2.Qg4# but 1...b2! 1.Bc3?? zz 1...Kf4 2.Qg4# 1...Kd5 2.Qc6# but 1...b2! 1.Ba1?? zz
