Author: Stuart Cracraft
Date: 12:53:49 01/05/06
Go up one level in this thread
On January 04, 2006 at 19:41:21, Charles Roberson wrote: >On January 04, 2006 at 18:36:53, Stuart Cracraft wrote: > >>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! > > It's easy to forsee when you think of extensions. Lets say you get into the >unsound position and your engine has check and single-reply extensions. Your >opponents engine only has check extensions. Thus, you could search much deeper >in the loosely described position than your opponent. > > My own experiements with single-reply extensions show a definite increase in >deep mate detection abilities as long as it is paired with check extensions. I use both of those too. Doesn't seem to help me get up past paltry 260ish on Win-at-Chess. Stuart
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