World Handicap System 2020:
There are several new safeguards to ensure the integrity of a player's Handicap Index.
A Soft Cap and Hard Cap limit the extreme upward movement of a Handicap Index over a rolling 12-month timeframe using your Low Handicap Index. Both caps apply automatically with no need to carry out calculations yourself. There is no limit on the amount by which a player's Handicap Index can decrease.
An Exceptional Score Reduction reduces a player's Handicap Index each time a score is submitted that produces a Score Differential at least 7.0 strokes below their Handicap Index.