Correct answer: Ke21...Kd3 2.Rd1# 1.Rb1?? zz 1...Kd3 2.Rd1# but 1...K:c5! 1.Ra1?? zz 1...Kd3 2.Rd1# but 1...K:c5! 1.Re1?? zz 1...Kd3
