Should there be fewer than eight players (but at least four), the tournament will consist of a single robin group, where the prize money will be split between the top two finishers.
Otherwise the tournament is in two phases.
Everyone plays in the group phase, where you play everyone in your group, which typically means three or four matches.
Players finishing in the top half of a group then move into the second phase, which is a knock-out.
Group winners take small cash prizes, with the remainder of the prize pot going to the knock-out finalists.
Furthest progression side pools are available at £10 and £20, which will be won outright on the night, the tie breaks being (1) furthest progression in the knock-out phase; (2) highest percentage of wins in the group phase; (3) best PR in the group phase (which will be superceded by "(3) best points difference in the group phase" when the software eventually allows.
This is one of eight such events this year, with performances rewarded by points in the Speedgammon Grand Prix.