Betting in tournaments can take one of three forms:
In a structured (fixed limit) betting system, bets and raises are restricted to specific amounts, though these amounts typically increase throughout the tournament. For example, for a seven-card stud tournament with the stakes at 10/20, raises would be $10 in the first three rounds of betting, and $20 in the latter rounds.
Semi-structured betting provides ranges for allowed raises. Usually, in this format, one may not raise less than a previous player has raised. For example, if one player raises $20, it would be illegal for another