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2021-09-24

  Wizard

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  Wizard

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  March 11th, 2013 at 3:28:48 PM

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  I just returned from a week in Costa Rica yesterday. I’ll write about the casino scene there shortly.

  Most casinos in Costa Rica have no blackjack at all, claiming it is illegal. Instead, they offer a blackjack-based game called Rummy. You can find the rules on my Odds site.

  Before you get your hopes up about all the good rules, especially early surrender, I think they don’t offset the no 3-2. I’m going to start working on an analysis, but if there are any bored mathematicians on the forum, feel free join in the fun and we’ll compare results.It’s not whether you win or lose; it’s whether or not you had a good bet.

  BigJer

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  March 11th, 2013 at 3:45:43 PM

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  So do they automatically pay a 21, 1:1 I assume, or do they wait until the round is over?The Terror of Casinos.

  Wizard

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  March 11th, 2013 at 3:49:04 PM

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  Quote: BigJer

  So do they automatically pay a 21, 1:1 I assume, or do they wait until the round is over?

  No. A 21-21 tie would be a push. Any winning 21 pays 1 to 1.It’s not whether you win or lose; it’s whether or not you had a good bet.

  BigJer

  BigJer

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  March 11th, 2013 at 3:58:08 PM

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  You know more about this than I do but I think it’s like playing SF21. In other words ………………. *barf*The Terror of Casinos.

  CrystalMath

  CrystalMathrummy in blackjack

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  March 11th, 2013 at 4:10:19 PM

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  Do you get paid the highest rummy bonus that you qualify for, or are they cumulative?I heart Crystal Math.

  Wizard

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  March 11th, 2013 at 4:54:29 PM

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  Quote: CrystalMath

  Do you get paid the highest rummy bonus that you qualify for, or are they cumulative?

  I just asked myself that as I start to work on this. Knowing how casinos usually interpret rules in their own favor, let’s say the player gets only the highest bonus he is entitled to. I think this issue would come into play with a suited 7-7-7 only.It’s rummy in blackjack not whether you win or lose; it’s whether or not you had a good bet.

  Wizard

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  March 11th, 2013 at 5:00:01 PM

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  A side analysis would be to look at the bonuses only.

  This table shows my analysis for a six-deck game, assuming the player always goes for the bonus.

  Bonus Pays Combinations Probability Return

  Three of a kind unsuited 3 23328 0.004653 0.013960

  Straight flush 3 9504 0.001896 0.005687

  Three of a kind suited 5 1040 0.000207 0.001037

  7-7-7 unsuited 5 1944 0.000388 0.001939

  6-7-8 suited 5 864 0.000172 0.000862

  Total 36680 0.007317 0.023485

  I’ll obviously have to take into account that the player won’t always go for the bonus.It’s not whether you win or lose; it’s whether or not you had a good bet.

  Wizard

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  March 11th, 2013 at 5:26:01 PM

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  Let me say that my rough estimate for now shows a house edge of right about 1%. I’d give it +/- 0.1%.It’s not whether you win or lose; it’s whether or not you had a good bet.

  pacomartin

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  March 11th, 2013 at 7:20:54 PM

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  Quote: Wizard

  Let me say that my rough estimate for now shows a house edge of right about 1%. I’d give it +/- 0.1%.

  Offhand it looks like with no blackjacks there is no way to count the game.

  Rule variants

  The following rule variants may be encountered in Rummy.

  I am confused by this rule variant : Unsuited 7-7-7 pays 3 to 1 bonus only.

  If the general rule is: Unsuited Three of a kind pays 3 to 1 is the exception that only 7-7-7 pays 3 to 1 , and every other unsuited three of a kind pays nothing?

  cclub79

  cclub79

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  March 11th, 2013 at 7:52:05 PM

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  Other questions: If you double and make a rummy hand, do you get paid on both bets? (ie, Double down on 5-5 and get another 5, or double 5-6 get a 4 or 7 )

  Can you double the A-10 to get a 3 card 21? If not, can you hit it for a 3 card 21?

  My guess is no for all of the above.