Correct answer: Qg51...Kd3 2.Qd4# 1.Bd1?? zz 1...Kd3 2.Qd4# but 1...Kd5! 1.Ba4?? zz 1...Kd3 2.Qd4# but 1...Kd5! 1.c4?? (2.Bc2#) but 1...K