Author: Sandro Necchi
Date: 22:17:27 06/26/05
Go up one level in this thread
On June 26, 2005 at 18:41:32, Peter Kappler wrote: >On June 26, 2005 at 18:16:05, Uri Blass wrote: > >>On June 26, 2005 at 15:40:32, Peter Kappler wrote: >> >>>On June 26, 2005 at 14:49:03, Sandro Necchi wrote: >>> >>>>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 >>>> >>> >>>I find it hard to believe that the best chess programmer in the world showed up >>>at the 2004 WCCC with a bug so severe that it weakened his program by 150 ELO >>>and he didn't even know about it. Are you telling me that he entered this >>>version of Shredder in the WCCC without doing any testing? >> >>I do not think that SMK is the best chess programmer in the world. >>The best chess programmer in the world is probably the programmer of fruit >>fabian. >> >>I expect the next version of fruit to be stronger than shredder9. >> >>It will probably be no stronger than Shredder10 but the only reason is that >>fruit is open source so SMK can learn from it when Fabien cannot learn from the >>source of shredder. >> >>Uri > > >Uri, I didn't intend for the "best programmer" comment to become a point of >debate. :) > >I think we can both agree that SMK is one of the all-time greats in the field, >and it's hard to believe that his testing methodology is so poor that he entered >the 2004 WCCC without realizing he had a bug that had weakened his program by >150 ELO. You don't get to #1 on the SSDF list with that kind of sloppiness. > >-Peter I suggest you to write to Stefan to get the whole story. I am not telling jokes, but only completing info on what happened. Sandro
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