Author: Uri Blass
Date: 00:22:51 12/13/05
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On December 13, 2005 at 03:21:07, Russell wrote: >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. I suspect that the question if shredder is destroyed by program X or not may be dependent on the opening positions that are used. Uri
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