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Subject: Re: Which programs can access 6-piece tablebases...

Author: Uri Blass

Date: 01:12:55 02/21/05

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On February 21, 2005 at 03:54:03, Dieter Buerssner wrote:

>On February 20, 2005 at 18:51:41, Dieter Buerssner wrote:
>
>>On February 20, 2005 at 18:40:34, Guido wrote:
>>
>>>You are right but if I remember well there is a mate in 127 and a loss in 127 in
>>>kppkp and another score to add is illegal position.
>>>So for kppkp it is necessary at least 9 bits. You could use the illegal position
>>>score meaning loss in 127, as illegal positions are not possible in the game.
>>
>>Hi Guido! IIRC, 8 bits was just enough for kppkp and all 256 numbers were used.
>>kppkp wtm has mate in 127, btm has lost in 127, together with draw and broken
>>positions, this exactly fits the 256 states possible in one byte.
>
>Oops, you were right, it seems. I forgot about loss in zero. Sorry for my
>useless post. BTW. the max positions here give fast Q-endgame, which is draw due
>to 50 moves rule.
>
>Dieter

I do not understand.

Do you say that computers with the old tablebases evaluate the max position as a
draw instead of mate and that they are right because of the 50 move rule?

Uri



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