Author: Vincent Diepeveen
Date: 11:39:05 10/04/02
Go up one level in this thread
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? > > >>>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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