Duplicate Poker

Duplicate Poker

Duplicate poker is a variant of the popular card game poker. Duplicate poker is based on the principles of Duplicate Bridge 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.

Duplicatepoker.com, the first poker room to use the format, closed down on October 5th 2008, citing the global financial crisis as the reason for the removal of services. It had previously been popular due to the fact that as a skill-based game it was legal in the U.S. While the game is more conducive 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 Tulsa, Oklahoma.

Progressive Jackpot

A progressive jackpot is a jackpot highest payoff for a gaming machine usually a slot machine or video poker machine where the value of the jackpot increases a small amount for every game played. Normally multiple machines are linked together to form one large progressive jackpot that grows more quickly because multiple players are contributing to the jackpot at the same time.

The amount of the jackpot is shown on a meter as a money value. Usually the jackpot can only be won by winning the combination with the highest payoff, e.g. a royal flush at a video poker game, or five of the most valuable symbols lemons, cherries, alligators, etc on a slot machine. Once a player wins the jackpot, the jackpot resets to a preset minimum level.

The amount on the jackpot progresses increases a small amount for every play on a connected machine. The amount that the jackpot advances by is set by the casino the house. For example, on a machine whose house edge is 5%, a generous jackpot contribution might be 1% one fifth of the expected profit. The house is prepared to contribute some of the profit of a jackpot linked machine because players are attracted by the:

Relative novelty of progressive jackpots generally, only a small fraction of the house's gaming machines will be connected to a progressive jackpot

Constantly changing meter, often displayed on large LED or LCD displays

Large amount of the jackpot, which eventually motivates more players to play the game

Usually only players who wager the maximum number of credits per play qualify to win the jackpot. All wagers, whether or not they are maximum credit bets, contribute to the jackpot though. As a result, a game which requires a 10 credit wager to qualify for the progressive jackpot will tend to have the progressive jackpot rise to higher levels relative to its break-even level than a game that requires only a 5 credit wager to qualify.

In some games such as video poker, it is possible to compute an optimal playing strategy based on the frequency for each payoff versus the odds of hitting that payoff. Since the jackpot of a progressive video poker game is constantly growing, it eventually can reach a break-even point where the machine becomes a positive expectation bet for the player.

When the progressive jackpot is less than the break-even point, there is a negative expected value house edge for all players.

In the long run, with optimal strategy, a video poker player can make a profit, although the long run is generally longer than most people think. Several tens of thousands of plays.

It is worthwhile to note that a break-even point cannot be easily calculated on a slot machine game, because the payback percentage for the game is normally unknown to the player. The break-even point in video poker can be calculated because the payback percentage for the game is a function of the paybacks and odds of the poker hands, which is based on a standard 52 card deck. The return of a slot machine is based on the published paytable, but also on the normally unpublished reels. For a five reel slot machine, the player would need to know each symbol on each of the slot machine's five reels, in order to calculate the odds. For a three reel slot, the reels are normally weighted, and this would not be possible. However, in some circumstances the manufacturer may publish the payout of their machines.