Author: Russell
Date: 00:21:07 12/13/05
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On December 13, 2005 at 02:47:04, Uri Blass wrote: >On December 13, 2005 at 02:16:50, Chrilly Donninger wrote: > >>I experimented recently with a Shredder-style search in Hydra. > > >What is shredder style search? > > The >>single-processor Shredder/Hydra completly demolished Shredder. If two programs >>are similar, the strength difference is enlarged. Its therefore a bad idea to >>tune a programme against itself. >>But the Shredder/Hydra made only 40% against Rybka. Changing back to the >>standard Hydra-search its between 75-80%. Rybka is regularily "killed" in >>king-attacks. As noted before, this numbers are for Hydra-single-processor. The >>PC-programm is running on a 3.2 MHz Pentium 4. Time control is 30secs/move. A >>standard-opening set similar to the Nunn-openings is used. >> >>Changing the search is not only a tactical matter. The playing style is to a >>large extend also influenced by the search. If two moves are from the evaluation >>point similar, the programm usually plays the one with the larger search tree. >>Or in other words: The lines which are extended. The Shredder/Hydra played >>over-aggressive, whereas the classical Hydra with the right dose. >> >>One conclusion of my experiment is: Rybka seems to be fairly tuned against >>Shredder. This is always the fate of the leader of the gang. In the future other >>programs will be tuned against Rybka and it will be much more difficult to stay >>on the top. > >Based on the blitz rating list Rybka32 -bit lost 12.5-11.5 against Shredder9(see >the link) so it does not seem to be tuned against shredder9 >http://www.husvankempen.de/nunn/eloblitz.html#2 > >Uri In Earlier thread in this forum showed Shredder being destroeyd by Rybka. Look at Kurt Utzinger test. Rebka Scored like above 70% I belive.
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