Author: Sandro Necchi
Date: 11:49:03 06/26/05
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On June 26, 2005 at 12:40:38, Peter Kappler wrote: > >>> 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. Well, it the program performs about 150 points elo less in matches I do not care if it should not do this. The score are facts, what a bug can do or not it could be a matter of opinions. I told you what Stefan told me when he found the problem. Previously I could only see that it was playing a lot weaker in some positions, but could not understand why. Sandro > >-Peter
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