Correct answer: Kf11...g2 2.Qg4# 1.Bd6?? zz 1...g2 2.Qg4# but 1...Kh2! 1.Be5?? zz 1...g2 2.Qg4# but 1...Kh2! 1.B:g3?? (2.Qg4#/Qh4#) but 1...K: