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Subject: Re: Shredder - Hydra 1-0 (CSVN, 2004)

Author: Peter Kappler

Date: 09:40:38 06/26/05

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>> And I do think you need to give more than one example to support your claim.
>>If it was truly a 150-point bug, it should be easy to find several positions.
>
>By mistake part of the program was deleted. This bug could not be seen at blitz
>level and was effecting the game only at high depths.
>It was related to pieces exchange handling info, this is why it was not able to
>see deeper on tactical combination if involving pieces exchange and was giving
>away pawns without compensation in some positions.
>
>>
>>It is strange that Stefan makes no mention of such a serious bug in his
>>post-match report.
>
>Well, he was not pround to discover that, but you can ask him.
>
>I found this problem after the 2004 WCCC and he did not believed me as all he
>did to the program was improving something. Yes, but by mistake he removed part
>of the program.
>So, the same version got 2nd at the 2004 WCCC and I really don't know how that
>was possible...I guess a lot of luck.
>

Or maybe the bug wasn't quite as harmful as you think?  What you describe above
sounds a like a problem with a recapture extension, not something that would
reduce playing strength by 150 ELO.

-Peter





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