Correct answer: Bd11.c3+?? 1...Ka4 2.Bd1# but 1...Kb3! 1.Bf3?? zz 1...K:c4 2.R:f4# but 1...Ka4! 1.Bd1! zz 1...Ka4/f3 2.c3# 1...K:c4 2.R:f4#