Author: Omid David
Date: 11:54:44 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 :) But what of if in 100% of the cases it returns a correct result: either: - Yes, the game is draw => return 0; - I don't know => do your regular search using your 200 patterns, etc. How can it possibly cause a problem? > >>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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