Author: Uri Blass
Date: 13:14:26 06/27/05
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On June 27, 2005 at 13:19:49, Peter Skinner wrote: >On June 27, 2005 at 10:56:28, Uri Blass wrote: > > >>It was not a non stable version but a version with bugs. >>The reply to your question why was already given. >> >>SMK did not know that it is buggy version. > >In fact in a thread below Sandro stated it was a beta version that had bugs. And >that it was 150 elo weaker. One _has_ to assume that they _knew_ it was beta, >and that it had bugs. No I believe that Stefan believed that it is the best version that he had in that time. He made some change that he believed to be an improvement and he did not notice that he deleted some part. I think that this was a failure of both stefan and sandro. Sandro could probably do a better job in explaining stefan that Shredder is weaker by showing him positions that the new shredder is weaker than the old shredder. If we want to talk about examples then I think that the fail low of shredder against falcon in WCCC could be a good example and based on my memory commercial shredder is clearly better in solving the fail low. I read in the israeli chess newspaper that shredder needed almost an hour to solve some fail low in that game and Falcon used that time to find the reason that shredder failed low. Maybe Falcon could not find some good move in case that shredder played it faster. Uri > >>Junior is a positional program? > >Yes it is. Junior and Hiarcs are probably the best positional chess programs >around. > > >>I do not believe it for a moment. >>Junior is a fast searcher. > >Exactly. Faster search = deeper depth = more positional play. > >>Fast searcher cannot have a lot of knowledge in it's evaluation so Junior >cannot be a positional program. > >Programs can become positional without knowledge but by deeper search. This has >been stated many times on this very board. deeper search can help to find better positional moves but I cannot define fast searcher as a positional program and there are a lot of things that you cannot find by deeper search. For example if you do not understand the fortress concept then there are cases when no search can help you to avoid a draw by fortress. Shredder shows some understanding of the fortess concept and there are fortress position that it evaluates as 0.00 or close to it(of course this understanding can be improved and there are a lot of fortress positions that shredder does not understand but at least stefan tried to do something in that direction). Junior shows no understanding of the fortess concept. Uri
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