We've been using the rules found here
which, after a quick skim, look about the same as those at Two-Headed Dragon. Matches will be single game, three player, free for alls timed at 50 minutes. After each game players will tally how many other players they eliminated and receive a point for each one before being paired for the next match. If a player somehow eliminates more than one player at a time, he is awarded a point for each, but in the case he eliminated himself (such as with hurricane) there would be no point for that "kill."