Correct answer: Rb21...K:c5 2.b4# 1...K:a5 2.Nc6# 1.Bg3?? zz 1...Kc3 2.Be1# 1...K:c5 2.b4# 1...K:a5 2.Be1#/Nc6# but 1...Ka3! 1.Ne6?? zz
