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 Post subject: The Spewy Louie Poker Bot
PostPosted: Sun Aug 12, 2012 2:25 pm 
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The Spewy Louie Poker Bot

Authors : Jon Parker, Chris Wacek

Abstract :

The Spewy Louie poker bot is a computer program capable of playing heads up No-Limit Texas Hold'em.
Spewy Louie was entered into the 2012 Annual Computer Poker Competition.
The precomputed strategy underpinning Spewy Louie's play is initially computed on-demand can then refined each time it is used during the self-play learning process.
Prior to the competition the precomputed strategy is drastically truncated.
This truncation reduces the cached strategy from 24 Million matrices to only 770 thousand matrices.
Cache misses during play (i.e. falling off the tree) are handled by initializing a regret minimization calculation that applies to that specific location in the game tree.

http://www.ualberta.ca/~archibal/papers/parker.pdf


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 Post subject: Re: The Spewy Louie Poker Bot
PostPosted: Mon Aug 27, 2012 12:13 am 
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Is there any info available on the flop board clustering strategy used?


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 Post subject: Re: The Spewy Louie Poker Bot
PostPosted: Tue Aug 28, 2012 9:20 am 
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As I recently played around doing something similar, there's a nice introduction to the general strategy they used at http://www.mathworks.se/help/toolbox/stats/bq_679x-3.html

However, the difficult part is defining the distance metric between two different boards. Two different approaches comes to mind.

Qualitative approach:
For all holecards on some board, count the number of flush draws, overpairs, gut shot draws, two overcards, one overcard etc.

Compare the above for two different boards to get a distance metric.


Quantitative approach:
For all holecards on some board generate (HS, PPOT, NPOT) and order them in a manner in which you can compare boards in a reasonable manner.

I haven't had the time to test these thoroughly though...


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