World Series of Snooker – Wikipedia

The World Series of Snooker was a series of invitational snooker tournaments set up as a complement to the WPBSA’s tour.

Its first season was played in 2008/2009, consisting of four two-day tournaments in St. Helier, Berlin, Moscow and Warsaw and the three-day Grand Final in Portimão.

There was a previous incarnation of the event organised by Matchroom Sport, that ran in the 1987/88 season, and from 1990/91 until 1992/93.