This is a list of professional and alternative format snooker tournaments. Professional snooker tournaments can take the form of ranking tournaments—which are open to players on the main tour and award ranking points based on a player's performance—and non-ranking tournaments. A non-ranking tournament may take the form of an invitational event where player participation is conditional on criteria set by the organiser or sponsor or by personal invite. Most tournaments take the form of a 'singles' event, but there are several team formats that have appeared on the calendar over the years.