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

Author: Charles Roberson

Date: 15:35:12 01/04/06

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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.






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