The Game 1. Substitutions may be made only at halftime. A team's roster may be changed between rounds.
Competition is by single elimination.
Points are scored by correctly answering questions of two types, toss-ups and bonuses. The first player to signal, during or after the reading of a toss-up by the moderator, must be recognized by the judge before answering. Players are allowed five seconds to signal after the moderator completes the reading of a toss-up, and they must answer promptly after they are recognized. A correct answer to a toss-up scores ten points. If a toss-up is answered incorrectly, it is turned over to the opposing team, whose players are allowed three seconds to signal.