The sport of professional snooker has had a world ranking system in place since 1976.
The events that made up the 1976–77 snooker season were the first to use a ranking points system.
[3] These revisions are used as official rankings, with points awarded in the current season overwriting those from two years prior.
[2] Seedings for each event were based on the world rankings, with totals being updated at specific revision dates.
On these dates, ranking points from the 2016–17 snooker season were removed from a player's total.