joshi tm: they already did so ? hmm :(
but the same could be done in any tournament

(although in triple gammon you can do something more sophisticated, and very unsportsmanlike!, with 3 people, each player losing a backgammon to another player, giving each player 5 points for 2 games ... but lets suppose most people are fair and sporsmanlike enough so that not 3 players would conspire ? and if they did it could be caught easily ?)