Correct answer: Bb3+1...Kd1 2.Bb3# 1.Ka4?? zz 1...Kd1 2.Bb3# but 1...Kb2! 1.Kb4?? zz 1...Kd1 2.Bb3# but 1...Kb2! 1.Bc4?? zz 1...Kd1
