Black has to go back and sooner or later. And White gets to the e5 pawn.1....Kd71...Kd62.Kb5Ke63.Kc5Kf64.Kd5and White gets to the pawn.2.Kd5...Now White is going to win the e5 pawn. After that move, where would the Black King like to be?2....Kd82...Ke7is a mistake as White gains the opposition after capturing the pawn.3.Kxe52...Ke8Also draws.3.Kxe5Ke7And now Black has the opposition and makes a draw!