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Subject: Re: Theory: Deeper Search creating worse performance due to PE

Author: Stuart Cracraft

Date: 15:36:53 01/04/06

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On January 04, 2006 at 18:35:12, Charles Roberson wrote:

>On January 04, 2006 at 18:22:29, Roman Hartmann wrote:
>
>>On January 04, 2006 at 17:41:54, Charles Roberson wrote:
>>
>>>
>>There is certainly the danger of 'seeing too much'. That applies also to simple
>>tactics. As an example the engine sees suddenly that it's getting mated in 20
>>moves and starts to throw away material to delay the mate while the opponent
>>didn't even saw/calculate the mate. So the the engine might play worse in some
>>games even though it is searching deeper than the opponent.
>>
>>regards
>>Roman
>
>   Yes! Seems to me your position evaluator would have led you to that position.
>The PE gives strategic guidance while the search procedure(s) keep the engine
>from tactical blunders. Then the engine winds up in the situation that you
>descirbed and assumes that the opponent sees what it sees and then starts
>tossing its pieces! The opponent may never see the mate and the game may
>continue for 40 more moves instead of 20, but your engine is now down material
>because it saw deeper than the opponent.

I'd like to see an example from reality, a real chess program example,
before I could believe it!



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