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Subject: Re: Draw due to lack of blockade detection...

Author: Vincent Diepeveen

Date: 11:21:16 10/04/02

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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 :)

>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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