The Official World Golf Ranking is a system for rating the performance level of professional golfers. It was started in 1986. The rankings are based on a player's position in individual tournaments (i.e. not pairs or team events) over a "rolling" two-year period. New rankings are calculated each week. During 2018, nearly 400 tournaments on 20 tours were covered by the ranking system. All players competing in these tournaments are included in the rankings. In 2022, 23 tours factored into the world rankings.As well as being of general interest, the rankings have an additional importance, in that they are used as one of the qualifying criteria for entry into a number of leading tournaments. From Wikipedia
