I-nomad

How to beat a Thai bar-lady at Jackpot

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Another popular and silly bar-game in Thailand is Jackpot.
For those who don’t know the rules, throw your two dices and you may select one of the results or take the sum of the two. You flip the selected number and continue until you’re able to turn all nine numbers, whereby the word .JACKPOT. appears. If the numbers you throw have been flipped already, you lost.
You can keep winning-scores when playing with others.
On the photo on the left you could choose between 3, 6 or the sum 9.
I’m very shy to admit but in my previous post I made a calculation mistake, playing the game over and over again, I noticed that the chance of throwing a 1 or 2 was far more higher than my predictions would allow, so I recalculated the whole thing, counting every combination from the 6 x 6 possible outcomes with two dice, with what some call a truth table. I now came to the following new graph, which shows that 9, 8 and 7 have the lowest chance, so it’s best to fill them up first, and if you can, after that, fill it up from the left. Which would mean in the above specific case always choose 9 first, not 3 and definitely not 6 which has a likelyhood of showing up four times in a winning game.
The ideal sequence keeping the highest probability for consecutive numbers to be thrown is: 9, 8, 7, then 1, 2, 3, 4, 5 and finally 6.

* Divide the vertical axis by 100 to get the likelyhood of the numbers 1 to 9 showing up in a winning game.

See also How to beat a Thai bar-lady at Connect 4

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One Response

  1. Anonymous
    Anonymous April 10, 2012 at 3:54 pm |

    Excellent post. I had always noticed that 5 and 6 seem to come up the most (so should be left towards the end of the game) and it's interesting to see some statistical validation.

    Reply

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