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Five-Card Mulligan Poker

Introduction

Five-Card Mulligan Poker is a defunct poker-based variation, which used to be found at Internet casinos formerly using Odds On software. The game is patented (patent number 7,735,830) by yours truly.

Following are the rules of the five-card version used by Odds On. Three and seven card versions have also been analyzed and covered by the patent application.

Rules

 

  1. A single 52-card deck is used.
  2. All hands are scored according to conventional poker rules.
  3. Play starts with the player making an ante bet. The player may optionally make a bonus bet as well.
  4. The dealer shall give each player five cards and himself five cards. The dealer's cards are dealt face down.
  5. The player has the choice to stand or take a Mulligan.
  6. If the player chooses to take a Mulligan, then he must make a raise bet equal to his ante bet. Players taking a Mulligan will exchange their original five cards for five new cards from the remaining cards in the deck. Taking a Mulligan will also forfeit the bonus bet, if made.
  7. The dealer will turn over his cards.
  8. If the dealer has an ace high or higher, then he will stand.
  9. If the dealer has a king high or less, then the dealer will take a Mulligan, discarding his hand for five new cards.
  10. The dealer will compare his own hand to the player’s hand, the higher hand wins. If the dealer has the higher hand, then the player will lose the ante and raise wager, if made. If the player has the higher hand, then both ante and raise will pay according to the ante and raise pay table below. A tie will result in a push.
  11. The bonus bet shall pay according to the pay table below.

 

 

Ante and Raise Pay Table

Player Hand Pays
Royal flush 100 to 1
Straight flush 50 to 1
Four of a kind 10 to 1
Full house 3 to 1
All other 1 to 1

 

 

Bonus Bet Pay Table

Player Original Hand Pays
Royal flush 10,000 to 1
Straight flush 1,000 to 1
Four of a kind 200 to 1
Full house 100 to 1
Flush 50 to 1
Straight 30 to 1
Three of a kind 10 to 1
Two pair 5 to 1
All other Lose

 

In this example, the player bet $25, received a lousy hand, and exchanged it for another hand, making the required $25 raise bet. The dealer had ace high or higher so he stood. The player had the higher hand, so both ante and raise paid 1 to 1, for a $50 win.

Analysis

The following table shows the possible outcomes in Five-Card Mulligan. The lower right cell shows a house edge of 3.152%. The player will raise 45.24% of the time, for an average wager of 1.4524 units. The element of risk is thus 3.152%/1.4524 = 2.170%. The standard deviation is 1.610.

 

Five-Card Mulligan Return Table

Event Pays Probability Return
Player wins with nothing, bet of 1 1 0.015127 0.015127
Player wins with pair, bet of 1 1 0.263124 0.263124
Player wins with a two pair, bet of 1 1 0.044279 0.044279
Player wins with a three of a kind, bet of 1 1 0.020721 0.020721
Player wins with straight, bet of 1 1 0.003902 0.003902
Player wins with flush, bet of 1 1 0.001956 0.001956
Player wins with full house, bet of 1 3 0.00145 0.004349
Player wins with four of a kind, bet of 1 10 0.000243 0.002431
Player wins with straight flush, bet of 1 50 0.000014 0.000693
Player wins with royal flush, bet of 1 100 0.000002 0.000153
Player wins with nothing, bet of 2 2 0.0257 0.051401
Player wins with pair, bet of 2 2 0.119065 0.238129
Player wins with a two pair, bet of 2 2 0.01975 0.0395
Player wins with a three of a kind, bet of 2 2 0.009114 0.018228
Player wins with straight, bet of 2 2 0.001762 0.003523
Player wins with flush, bet of 2 2 0.000889 0.001779
Player wins with full house, bet of 2 6 0.00063 0.003781
Player wins with four of a kind, bet of 2 20 0.000103 0.002056
Player wins with straight flush, bet of 2 100 0.000006 0.000623
Player wins with royal flush, bet of 2 200 0.000001 0.000141
Player loses with bet of 1 -1 0.196808 -0.196808
Player loses with bet of 2 -2 0.275306 -0.550612
Player ties with bet of 1 0 0.000021 0
Player ties with bet of 2 0 0.000028 0
Total   1 -0.031523

 

Strategy

The player should switch with AK953 or lower, and stand on AK954 or higher.

Methodology

This game was analyzed via random simulation in C++. The return table is based on over 22 billion hands.