Author: Joachim Rang
Date: 11:34:46 10/04/02
Go up one level in this thread
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 > >>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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