A typical one-day tournament holds three or four rounds. Each debater advocates each side an equal number of times or one side once more than the other, depending on whether the number of rounds is even or odd. Multi-day tournaments have five to eight preliminary rounds in which all debaters participate. The debaters with the best win/loss record from this set of rounds then advance (called "breaking" or "clearing") to a single-elimination stage of "outrounds" that determines the eventual champion. All debaters present have the hypothetical potential to "hit", or square off against, any other competitor in their field at the tournament, though if at all possible debaters are prohibited from hitting members of their own team and hitting someone they have previously hit earlier at the same tournament again. Similarly, judges who have already judged a debater are not supposed to judge them again in preliminaries. In contrast, a tournament in which each competitor must debate every other competitor is called a "round robin". These tend to be very small, and specific participants are invited to attend.