How To Play Duplicate Poker - Offered at E-PokerUSA
e-PokerUSA Duplicate Poker involves play of Pot Limit and No Limit Texas Hold'em under the general rules governing that game with four exceptions.
First, there are always two or more tables of players, with the same number of players seated at each table.
Second, an identically shuffled deck of cards is used at each table for each hand played so that players in the same seat position at each table receive the same hole cards and the common cards are the same at each table.
Third, every player begins each hand with the same number of playing chips, regardless of how he/she may have done in any previous hand.
Fourth, the winner of each hand is determined based on the number of chips he or she has at the end of the game as compared with those held by all players in the same seat at the other tables.
Prizes are awarded based on the entry fees paid by the respective players, less a predetermined house fee, or "rake", paid to the operator of the game.
In order to balance the number of players at the tables for the games, e-PokerUSA reserves the right to place artificial intelligence players ("AI Players") in the empty seat position at the table where the player is missing. The AI Players are used only to balance the number of players at the tables, and the number of AI Players is always minimized. Players entering a game who have not played the immediately prior hand will be seated at random, without the opportunity to choose a particular seat.
The determination of which players receive prizes from the pool consisting of the entry fees, and how much is awarded to those winners varies based on which of the three variations of duplicate poker contests is being played:
Winner Takes All,
Get Fair Share
Normalized Tournaments
In Winner Takes All ring games, the player that finishes with the largest number of chips in the compared hand wins the buy-in amounts risked by the players, less the house fee, or "rake". The rake is a fixed amount, which is deducted from each player's account at the beginning of each deal, as shown in t he table below
Buy-in Amount House Fee
$1.00 $0.10
$5.00 $0.25
$10.00 $0.40
$20.00 $0.60
Other players in the hand lose some or all of their buy-ins. The amounts lost are determined by a calculation of how well they did in relation to the winner's results. The one winner is credited with all of the amounts lost by the other players. The results of a given hand are first "normalized" by subtracting from all players the number of chips held by the winner. Players other than the winner lose a portion of the amount of money risked on the hand equal to the number of their respective normalized chips divided by the total chips with which they began the hand. The following tables show the application of those calculations in two different hands.
Winner Takes All Example 1 Players at 4 tables each risk up to $10 and start the hand with 1,000 chips, for a chip value of $0.01. Hand Results
(in chips) "Normalized" Results
(in chips) Normalized Gross $ Won or Lost
Player 1 (table 1, seat 1) 1,800 0 $19.00
Player 2 (table 2, seat 1) 1,700 -100 -$1.00
Player 3 (table 3, seat 1) 1,000 -800 -$8.00
Player 4 (table 4, seat 1) 500 -1300 -$10.00
Total 5,000 -2200 $0.00
In this example, the results of the players in seat 1 at four different tables are compared. Each result is compared to the player with the most chips at the end of the hand. Those comparisons are translated from chips to dollars and cents. The final result is that one player loses $1 out of the $10 he risked on this hand, one player loses $8, and the last player loses the entire $10 risked. The winning amount is a positive sum of the losses. Note: on the basis of the mathematical application player 4 would have lost $13, but the loss is limited to the $10 buy-in, which is the total amount risked.
Winner Takes All Example 2 Players at 5 tables each risk up to $1 and start the hand with 100 chips, for a chip value of $0.01. Hand Results
(in chips) "Normalized" Results
(in chips) Normalized Gross $ Won or Lost
Player 1 (table 1, seat 1) 123 0 $1.75
Player 2 (table 2, seat 1) 110 -13 -$0.13
Player 3 (table 3, seat 1) 109 -14 -$0.14
Player 4 (table 4, seat 1) 58 -65 -$0.65
Player 5 (table 5, seat 1) 40 -83 -$0.83
Total 440 -175 $0.00
In this example, the players each risk $1. The number of starting chips is reduced to 100. The differences in results between the players are less than in example 1.
Get Fair Share ring games, distribution of the prizes is made proportionally among the players in the same seat number. This is based on the percentage of the total chips in play in those seats that is held by each player at the end of the hand. If all of the players in the same seat number in a given hand fold before the flop, the full buy-in paid by each is refunded without any house fee being retained. Rake in e-PokerUSA games is a fixed amount deducted from each player's account at the beginning of each deal, as shown in the table below
Price of the deal rake
$1.0 $0.1
$5.0 $0.25
$10.0 $0.4
$20.0 $0.6
Two examples below illustrate this method of calculating the distribution of the net prize pool in Get Fair Share play: Get Fair Share Example 1 $10.00 buy-in paid by each of 4 players in the "1 seat" resulting in a prize pool of $40. Each player begins the hand with 1,000 chips Hand results
(in chips) Percent Win $
player 1 (table 1, seat 1) 1,230 30.75% $12.30
player 2 (table 2, seat 1) 1,100 27.50% $11.00
player 3 (table 3, seat 1) 1,090 27.25% $10.90
player 4 (table 4, seat 1) 580 14.50% $5.80
Total 4,000 %100.00 $40.00
Get Fair Share Example 2 $1.00 buy-in paid by each of 5 players in the "1 seat" resulting in a net prize pool of $5. Each player begins the hand with 500 chips Hand results
(in chips) Percent Win $
player 1 (table 1, seat 1) 780 31.20% $1.56
player 2 (table 2, seat 1) 590 23.60% $1.18
player 3 (table 3, seat 1) 400 16.00% $0.80
player 4 (table 4, seat 1) 400 16.00% $0.80
player 5 (table 5, seat 1) 330 13.20% $0.66
Total 2500 100.00% 5.00$
Normalized Tournaments
Simplified Explanation
In e-PokerUSA's Duplicate Poker tournaments two kinds of chips are used: Hand Chips and Victory Chips.
All players start every hand in the tournament with the same number of Hand Chips. This helps to ensure that each hand is played based on the player's determination of the best way to play the cards received rather than on the basis of his or her starting stack size.
All Players start the tournament with an predetermined equal number of Victory Chips. Assume that we have five players in seats 1, 2, 3, 4 and 5 at three tables, A, B and C, and each player starts the tournament with 1,000 Victory Chips. At the end of each duplicate hand, the results of each player in the same seat number at each table are compared and formulas are applied to those results to determine the number of Victory Chips each player wins or loses. That number of Victory Chips is added to or subtracted from the accumulated Victory Chips the player had before the start of the particular hand.
The formulas that determine Victory Chips are designed to decrease and dampen the swings in the amount of Victory Chips won or lost in the play of "good" and "bad" hands. In order to accomplish that result, the formulas are of necessity complicated and involve the application of statistical principles to the results of the hand for each player.
The results of the application of the formulas are shown to players as soon as play of the particular hand is completed at all tables.
For a detailed explanation of the scoring system visit e-PokerUSA.
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