Bring your favorite D20, which will be inspected by our Dice Expert for tampering. Limit of 1" in diameter. Each participant will roll his die at least 24" on the championship playing surface. In the first heat, you must roll an "18", "19", or "20" to advance. In the second heat, you must roll a "19" or "20" to advance. In the final heat, only a natural "20" will win. In the case of a tie, there will be a rolloff. The champion will win a trophy.