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Subject: Re: BUG in Shredder or wrong notation in game 3 ?

Author: Uri Blass

Date: 07:53:13 07/19/05

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On July 19, 2005 at 09:42:53, Kurt Utzinger wrote:

>On July 19, 2005 at 08:38:25, James T. Walker wrote:
>
>>I don't believe any engine in the world above a 1200 rating will allow the
>>bishop to escape.  I suspect an operator blunder.
>>Jim

There are engines above 1200 that can do this type of stupid blunders because of
bugs.

I remember that horizon gave Movei a queen because of a similiar bug in one of
Leo's games(the bug did not cause it to blunder in most of the games and it is
clearly stronger than 1200.


>
>      This is the only logical explanation
>      for the mishap -:)
>      Kurt

This is not the only logical explanation.

A program may have bugs that cause it to do stupid blunder in 1 out of 1000
games and still be the strongest.

Of course it cannot happen often with shredder but there is no way to be sure
that it can never happen because it is always possible that the bug is rare
enough so it did not happen in your tests.

It is also possible that the fault is not in shredder but in the computer and I
remember that Rebel played bad moves in some game in the anti-GM challange
because the computer was too hot.

Uri



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