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Second International RoShamBo Programming Competition   Message List  
Reply | Forward Message #41 of 355 |
Re: [pokersource] Question re: Omaha showdowns

At 06:50 PM 31-05-00 -0700, mph@... wrote:

> > Do we have a code repository up yet? Is there a more elegant way of
> > handling Omaha showdowns than examining SIXTY potential high hands and
> some
> > number of lows approaching that?
> >
>
>Michael M. and Steven L. posted an idea for an optimization for the
>low hand. The concept is that you can encode the hand in a byte
>(bitmapped for each rank) and use that to index into a precomputed
>array of results. Voila O(1) low determination.

16 bits (8 bits for board low values and 8 bits for hand low values)
can index into the table. Also, if the board contains insufficient
low cards, that can be pre-flagged if lots of hands are going to be
compared to the same board.





Thu Jun 1, 2000 3:54 am

slandrum@...
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Message #41 of 355 |
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Since there was some interest in the first RoShamBo competition, here is the announcement of the follow-up contest. - Darse. The Second International RoShamBo...
Darse Billings
darse@...
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May 31, 2000
11:53 pm

Do we have a code repository up yet? Is there a more elegant way of handling Omaha showdowns than examining SIXTY potential high hands and some number of...
ADBjester
jester@...
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Jun 1, 2000
1:28 am

... Michael M. and Steven L. posted an idea for an optimization for the low hand. The concept is that you can encode the hand in a byte (bitmapped for each...
mph@...
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Jun 1, 2000
1:50 am

... 16 bits (8 bits for board low values and 8 bits for hand low values) can index into the table. Also, if the board contains insufficient low cards, that...
Stephen H. Landrum
slandrum@...
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Jun 1, 2000
3:53 am

... *blush* Duh....
mph@...
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Jun 1, 2000
4:01 am

... Actually, I consider brute-force evaluation to be elegant. At least for the high case. But that's in the eye of the beholder. Brian's "sentinel hand"...
Michael Maurer
mjmaurer@...
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Jun 1, 2000
7:26 am

... Yes. You can browse the cvs archive at www.pokersource.org. ... You can cut the number of evaluations in something like half by doing the following: Call...
Brian Goetz
brian@...
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Jun 1, 2000
1:54 am
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