explanation from wikipedia:
Duplicate poker is a variant of the popular card game
poker. Duplicate poker is based on the principles of
Duplicate bridge,
[1] but also involves some of the rules used for playing pot limit and no limit
Texas hold'em.
Duplicate poker is a skill-based game in which there are two or more tables consisting of the same number of players. Each table is dealt with an identically shuffled deck of
cards. Every player holds the same hand as the person seated in identical seats at other tables.
All players begin each hand with the ability to bet the same number of playing chips, regardless of prior performance in the previous rounds.
The object of Duplicate poker is to win more chips than your opponents sitting in corresponding seats at other tables. Ultimately, the winner is decided based on the total number of chips accumulated up until the end of the game, as compared with those held by all players in the same seats at the other tables. Conceivably, even a player who loses chips overall can win at the game if that player loses fewer chips than his opponents.
While the game is more condusive to an automated online format because of pre-set decks and the need to record accurate scoring, Duplicate poker has also been played in a live format. The first-ever Duplicate poker tournament was held in April 2007 at the Cherokee Casino in Tula, Oklahoma.