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Subject: Re: Crafty Tablebase Probes

Author: Robert Hyatt

Date: 08:09:59 08/27/99

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On August 27, 1999 at 01:54:24, blass uri wrote:

>
>On August 27, 1999 at 00:06:25, Robert Hyatt wrote:
>
>>On August 26, 1999 at 20:21:04, Mark Rawlings wrote:
>>
>>>I _finally_ got all of the 5-piece tablebases to use with Crafty and Winboard!
>>>These things are great for analyzing endgames.  Still waiting for the 6-piece
>>>files to be posted :)
>>>
>>>Anyway, what is a "successful" tablebase probe?  I thought when you have the
>>>whole set, all probes were successful?  Thanks,
>>>
>>>Mark
>>
>>
>>Note that you don't have the "whole set" because we didn't build the 4 vs 1
>>piece files.  You can, but they take up a whole lot more space, and I don't
>>think crafty needs those to win the positions.. :)
>
>There are some 3 vs 2 tablebases that crafty does not need to win the position.
>
>For example KQRvs KP,KQR vs KN
>
>Uri


There are many that it doesn't need... (KQ vs KR is another) however without all
of them, the search definitely gets confused.  And it is much better to _know_
when you are exchanging into a won ending, rather than into an ending you think
you can win but can't...

We will have to do the 4 vs 1 files before we get to the 3 vs 3 files, which
are not too far into the future now.  So one day we will have all the 5's and
a bunch of the 6's...



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