The event provides additional competition and effectively acts as a qualifier for the final Premier League Snooker place.
In total, 25 players take part in the round-robin stage, there is no audience and every match is broadcast via bookmaker streaming only. Players earn money for every frame won and there are also prizes for being a semi-finalist, runner-up and winner of each group, with more money involved in the winners group.
All matches are the best of five frames, with the competition featuring eight groups, each consisting of seven players.
From the league stage of the first seven groups the top four qualify for a play-off, the winner of which qualifies for the winners group. The bottom two players of each league are eliminated and the remaining four moves to the next group, where they are joined by three more players until the seventh group.
The winners play in the final group with the overall winner taking a place in that year's Premier League Snooker.
Previous winners include Joe Perry, Judd Trump, Marco Fu, Matthew Stevens and Ding Junhui.