Author: Omid David
Date: 14:12:11 10/04/02
Go up one level in this thread
On October 04, 2002 at 16:40:04, Vincent Diepeveen wrote: >On October 04, 2002 at 15:39:36, Omid David wrote: > >So you are declaring that months of work of me some years ago is >completely stupidly done because you can do it 'perfect' like the >EGTBs can do it? No, I can't do it perfect. There are many blockaded positions which my method fails to detect. But when it _does_ detect them, it has a 100% accuracy. > >>On October 04, 2002 at 15:17:45, Joachim Rang wrote: >> >>>On October 04, 2002 at 14:39:05, Vincent Diepeveen wrote: >>> >>>>On October 04, 2002 at 14:34:46, Joachim Rang wrote: >>>> >>>>>On October 04, 2002 at 14:21:16, Vincent Diepeveen wrote: >>>>> >>>>>>On October 04, 2002 at 11:48:06, Omid David wrote: >>>>>> >>>>>>How many times must i say the same thing? >>>>>> >>>>>>Suppose i have 200 patterns to adjust my score. >>>>>> >>>>>>Now 1 pattern can undo all those 200 patterns. >>>>>> >>>>>>I'm then either an idiot then to have those 200 patterns, >>>>>>or to use that one pattern, if it is in 50% of the cases wrong. >>>>>>Even if it is in 80% of the cases right :) >>>>> >>>>>I can't understand what you are trying to say. >>>>>Suppose you have 200 patterns and add another drawing-detection pattern a la >>>>>Omid. This 201st pattern overrides the 200 other patterns if certain >>>>>circumstances are met (which means in certain positions). The pattern does not >>>>>change any evaluation if certain circumstances aren't met. Suppose you can >>>>>describe the circumstances correctly, the drawing pattern overrides the 200 >>>>>other patterns only in the correct positions. The other 200 patterns you need >>>>>for the other positions. >>>>> >>>>>regards >>>>> >>>>>Joachim >>>> >>>>You still think chess is like mathetmatics, so >>>> 1 = 1 >>>> >>>>and >>>> >>>> 2 = 2 >>>> >>>>then whey aren't there engines playing perfect chess? >>> >>>yes you may be right, I'm quite a newbie in computer chess and a weak player >>>too. But why are you angry at me, instead of telling me, where I don't see the >>>point (which should be a bit more concrete than "you are to stupid to understand >>>it"). >> >>The fact that you are a newbie doesn't have anything to do with this case. Your >>reasoning was completely correct. >> >>I'm telling you, there *is* a way to detect blockades with 100% accuracy, i.e. >>there might be blockades in which it doesn't detect and that's fine (you'll do >>regular search), but it *never* announces draw wrongfully. >> >>It *can* be done, for I have done it, and I believe most of the programmers here >>(including Vincent, if he thinks a little before announcing it "impossible") can >>do it. >> >> >>> >>>If I understand you correctly you doubt that there is a way to detect such draws >>>100% correctly. Okay I'm not an expert in this area you may be right. >>> >>>> >>>>> > >>>>>>>On October 04, 2002 at 11:34:39, Vincent Diepeveen wrote: >>>>>>> >>>>>>>>On October 04, 2002 at 11:26:51, Omid David wrote: >>>>>>>> >>>>>>>>slowing down the search is not the problem. the problem i >>>>>>>>explained in email to sargon >>>>>>> >>>>>>>So I assume the problem is that it's not 100% reliable, and may return >>>>>>>inaccurate estimates. Right? >>>>>>> >>>>>>> >>>>>>>> >>>>>>>>>On October 04, 2002 at 11:22:05, Vincent Diepeveen wrote: >>>>>>>>> >>>>>>>>>>On October 04, 2002 at 10:34:43, Omid David wrote: >>>>>>>>>> >>>>>>>>>>had fritz implemented such a scheme it would play 300 points weaker >>>>>>>>>>anyway. >>>>>>>>> >>>>>>>>>It depends on how you implement it without slowing down the search >>>>>>>>>significantly, and that's what I'm currently working on... >>>>>>>>> >>>>>>>>>It's obvious that applying the whole heuristic on each and every node is too >>>>>>>>>expensive. But a wise application of it, could detect many draws without any >>>>>>>>>significant impact on the total speed. >>>>>>>>> >>>>>>>>>Omid. >>>>>>>>> >>>>>>>>> >>>>>>>>>> >>>>>>>>>>>Just today we had a discussion regarding the importance of blockade draw >>>>>>>>>>>detections http://www.talkchess.com/forums/1/message.html?255950 >>>>>>>>>>> >>>>>>>>>>>Had Fritz implemented such a scheme, it wouldn't have stepped into the drawing >>>>>>>>>>>variation. >>>>>>>>>>> >>>>>>>>>>>My engine instantly announced draw based on its blocked-draw detection >>>>>>>>>>>heuristic. While Fritz never realized the draw... >>>>>>>>>>> >>>>>>>>>>>Omid.
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