Correct answer: Bb21...Kf4 2.Ng6# 1.Ng6+?? 1...Kd4/Kd6 2.Rd3# but 1...K:f6! 1.K:c5?? zz 1...Kf4 2.Ng6# but 1...K:f6! 1.B:c5?? zz 1..
