I misplayed this ending, and ended up with a draw. My excuse, it was a blitz game. What else? Sometimes, this rule that we have to centralize our king in the endings gets in the way of a won game. But, it is when to apply the rule or not is what makes chess a game of good judgment. My immediate inclination was to get my king into the action, and I played 42. Kf2? Bad move. The trick here was to push the D pawn immediately where the black king would catch up to it at d7. By then, the bishop can support the pawn while the white king moves up to confront black's G & H pawns. In some variations, there are themes of zugswang. The pivotal point here is that black's king is tied down to the defense of D8, and his counterpart is free to roam.