This is the most popular variation of Hold'em. In No Limit, any player at any time can bet or raise an amount determined only by the amount of stacks in front of him. By going 'all-in' he bets all his chips in one go. If someone with an even bigger stack raises him, the first player doesn't automatically lose but will only win an amount equal to the size of his own stack. In limit Hold'em bets are restricted to the blind levels. For example, in a limit $3/$6 the first bet must be $3. A raise would mean betting an additional $3 – no more, no less.