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Subject: Re: Counting & Encoding Any Chess Position in 157 bits

Author: Les Fernandez

Date: 00:47:04 11/13/99

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On November 13, 1999 at 01:25:23, Bob OBob wrote:

>On November 10, 1999 at 02:53:57, Ratko V Tomic wrote:
>
>
>>    3.6
>>                              The ep status also wasn't encoded,
>>        but since there could be at most 4 ep capture targets (white
>>        assumed to move, thus 4 targets are black pawns on the 5-th rank),
>>        the ep would add at most log2(5)=2.32 bits (to the 154.110 bit
>>        position code length; some checks on pawn counts in MC state could
>>        lower this further). Thus the ep+castle status would still keep
>>        the full position code length below 157 bits.
>
>
>
>Fifth rank:    wp bp bp wp bp bp wp bp
>
>Any one of *five* black pawns might be vulnerable
>So, a fraction of a bit more
>
>
>
>     Bob O`Bob


Hi there Bob and welcome aboard.  Chat with you soon its way past my bedtime

Les



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