Correct answer: b31...Kd4 2.Rf4# 1.Kf6?? zz 1...Kd4 2.Rf4# but 1...Ke4! 1.Kg4?? zz 1...Ke4 2.Re2# but 1...Kd4! 1.Ke6?? zz 1...Kd4 2.
