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Subject: Re: 50 move rule question

Author: Will Singleton

Date: 16:35:24 04/20/99

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On April 20, 1999 at 15:34:34, Christophe Theron wrote:

>On April 20, 1999 at 14:40:08, Will Singleton wrote:
>
>>
>>On April 20, 1999 at 14:10:20, blass uri wrote:
>>
>>>
>>>Some programs knows that it is a draw but instead of stopping to play and claim
>>>that it is a draw they start to do stupid mistakes and lose the game.
>>>
>>
>>Yes, my program used to do that.  Once past 50 (either actual or in the search),
>>it would think all moves were equivalent, and would pick whatever happened to be
>>first.  Now I take into account potential loss of material.
>>
>>There is a similar bug some progs have, that when a repetition is found, it
>>doesn't consider whose move it is.  So, it might move into a repeat position and
>>score it a draw, except that when the position occurred before it was the progs
>>turn to move, and now it's going to lose its piece.
>>
>>Will
>
>Yes! The 16 bits version of Tiger had that bug one time, and lost against a
>human player in an important tournament game! But it was easy to fix once I
>realized what it was...
>
>
>    Christophe


Right, server play helps to find a lot of these "gotchas."  Another one for me
is the idiotic Bxa2 b3 ooops problem.  I'm currently testing a "fix" for this,
so it doesn't horizon it off.  Needs work, though.

Will



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