May 12 in Kentucky: BBJJO Round Robin
This is a round robin format tournament. Competitors are separated by rank, then by weight, with the first five lightest competitors making a division, the next five lightest making the next division and so on. Weigh-in is on the day of the tournament, and as there are no set weight classes, there should be no need for weight cutting.
With a round robin format, each competitor is matched against each of the other four people in the division, meaning every competitor has four fights for the day.