Author: Uri Blass
Date: 01:48:18 11/20/00
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On November 19, 2000 at 20:46:48, stuart taylor wrote: >We are indeed seeing the new upcoming generation of chess programs (ready for >2001) losing many games to the outgoing generation (2000). > And during the past year, we have often seen, even many games sometimes being >won by the 1999 program aginst a 2000 one. > But normally the newer generation wins slightly more. Maybe that is largely >because they were tested over and over again, to make sure of that, before they >were ever released. > But how about testing 2001 programs against 1999 ones. Can we be sure that >2001 would win a vast majority, or even more important, atleast, never be >convincingly beaten, even if it has to lose the occasional game (against a 1999 >version)? > Hiarcs, by the way, as far as I understand, is a 1998 program. 7.0, 7.01, and >7.32 are the exact same program 7.00 7.01 7.32 are not the same. 7.32 is probably slightly weaker than 7.01 inspite of the tablebases because it probably has new bugs. I found bugs in 7.32 retaining hash tables and if 7.01 or 7.00 do not suffer from the same bug then it can explain the fact that 7.32 has 2530 ssdf rating when 7.01 has 2535 ssdf rating. Statistical error can be another explanation but I guess that the reason is the hash bug when the tablebases do not give enough compensation. Uri
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