Author: Uri Blass
Date: 12:44:22 10/13/05
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On October 13, 2005 at 13:32:58, Ryan B. wrote: >On October 13, 2005 at 06:26:05, Uri Blass wrote: > >>On October 13, 2005 at 03:02:45, Ryan B. wrote: >> >>>I think it is a known issue that Toga, just like Fruit that it is based on, >>>knows very little about stratrgy and plays off being a great searcher. >> >> >>No >> >>I think that evaluation is one of the big advantage of fruit relative to >>opponents and not search. >> >>I have examples when Fruit simply evaluate position better than commercial >>programs. >> >> >> Becuase >>>it is an open source program you could add to the eval but it will slow down the >>>search some for each thing added. In computer chess it is still tactics over >>>strategy, never mind the so called "positional" chess programs. >> >>I disagree. >>I think that there are lot of positions that fruit understand better than >>commercial programs(see the case of the exchange sacrifice that I mentioned) >> >>Fruit is also not a fast solver of nolot 1 or nolot 2 so I do not think it's >>relative advantage to the commercial programs is tactics. >> >>Uri > > >Fruit understands the exchange sacrifice you mentioned because it has no bad >trade value. I am sure it could also get burned on not having one. Not that a >bad trade value is good chess knowledge becuase it is just a lazy assumption >that is usualty right. The exchange sacrifice is not the only case look at the last game of the following post http://www.talkchess.com/forums/1/message.html?455583 Here is a position from that game [D]3r1k2/5p1p/3b2r1/5pp1/Pp1B2n1/1P2PB2/4QP1q/R2R1K2 b - - 0 27 Fruit has positive score for black when Shredder evaluates it as better for white and need time to see positive score for black. What is the reason that shredder evaluates it as better for white at small depth if not inferior knowledge relative to Fruit. I think that fruit is simply better evaluator than Shredder and Fruit2.2 can beat Shredder inspite of being often outsearched by shredder because of a better evaluation. Uri
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