Author: Uri Blass
Date: 17:59:33 08/14/05
Go up one level in this thread
On August 14, 2005 at 20:12:37, Eugene Nalimov wrote: >On August 14, 2005 at 20:08:21, Uri Blass wrote: > >>On August 14, 2005 at 18:01:28, Robert Hyatt wrote: >> >>>On August 14, 2005 at 17:00:02, Bernhard Bauer wrote: >>> >>>>On August 14, 2005 at 16:47:43, Darrel Briley wrote: >>>> >>>>>On August 14, 2005 at 15:22:43, Graham Banks wrote: >>>>> >>>>>>Best wishes for the remaining games. It would be really good for this to be the >>>>>>best Crafty ever! Fingers and toes crossed! >>>>>> >>>>>>Graham. >>>>> >>>>>1.5 with two blacks vs. Shredder and Junior. Impressive indeed. >>>>>Congratulations Bob! >>>>> >>>>> DB >>>> >>>>As Bob has pointed out earlier this is pure luck. >>>>Crafty has serios tactical weaknesses as all the >>>>computer chess specialists know. Crafty is not even commercial, >>>>so how can this be explainded in any other way, but luck? >>>>Perhaps Bob has found a very old version and is running this now, 6.4? >>>> >>>>Anyway congratulations and >>>>Kind regards >>>>Bernhard >>> >>> >>>I'd bet that those "serious tactical weaknesses" are not to be found on this >>>hardware, at least until someone is searching far faster than I am... >> >>Tactical weaknesses can be found also in software. >> >>> >>>Crafty's "serious tactical weaknesses" are more urban legend than fact... >> >>Comparing Crafty with fruit Crafty does not do checks in the first ply of the >>qsearch when fruit does it and Crafty does not use history based pruning when >>fruit does it. >> >>I think that these are relative weaknesses and using the ideas of fruit may help >>Crafty to be better in tactics. > >Those are not "ideas of fruit". Both are mentioned in the 1977 computer chess >book written by KAISSA authors. > >Thanks, >Eugene You may be right but fruit proves that they can work practically in chess programs and Fabien showed the relevant source and as far as I know Bob never tried checks only in the first ply of the qsearch. There are other public chess programs that use these ideas like Glaurung and I also use these ideas in the last years in Movei but the motivation to try an idea should be bigger if it is clear that it works for stronger chess programs and Fruit is stronger than Glaurung so I mentioned fruit. Uri
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