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Subject: Re: Compact encoding of chess positions

Author: Mathieu Pagé

Date: 09:22:10 03/05/05

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On March 04, 2005 at 14:06:37, Dann Corbit wrote:

>On March 04, 2005 at 09:42:21, Mathieu Pagé wrote:
>
>>On March 04, 2005 at 05:12:51, Reinhard Scharnagl wrote:
>>
>>>On March 04, 2005 at 04:48:36, Dann Corbit wrote:
>>>
>>>>What do you calculate as the theoretical maximum, using your encoding?
>>>
>>>That is hard to say. There still are a lot of redundancies within this
>>>encoding: there might be still of illegal or impossible positions to be
>>>encoded, and some very theoretically extisting extreme promotion situations
>>>will have an excessive length.
>>>
>>>I think, that it would be best to use that code to encode all positions
>>>of a set of PGN data, estimating an average length of more practical
>>>relevance than I have estimated.
>>>
>>>Nevertheless I think, the limit might be around 2*(10^43) as I have read
>>>from N. Petrovic.
>>>
>>>Reinhard.
>>
>>I have a database of about 190 millions chess positions if you are interested.
>
>Are they bare EPD records?
>
>Do they have any analysis associated with them?

They are FENs strings in a text files, I do not remembre the size of the files,
but in compressed form it takes two CDs



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