Author: Keith Ian Price
Date: 13:43:27 07/09/03
Go up one level in this thread
On July 09, 2003 at 16:07:03, Jeroen van Dorp wrote: >On July 09, 2003 at 15:46:12, GuyHaworth wrote: > >> >>The main message is that SHREDDER 7.04 dominates the field by some 40 points, >>approximately the same as Kasparov leads the FIDE ELO list. >> >>The 2800+ figure is not meaningful, as stated elsewhere here. > >An Elo rating tells you the difference in strenght between two opponents. Have >you any clue why the rating difference between shredder and the next on the list >is "not meaningful"? That is not what he said. He said the 40-point difference was meaningful, but the 2800+ rating was not, since it is not pegged to any absolute rating. > > >>I heard once that there was an inflationary effect built (incidentally rather >>than deliberately) into the ELO system. I don't know if this is true, or if so, >>why it is true. >> >>But if so, I would expect the SSDF rating list to 'inflate' faster than FIDE's >>as the same number of games happens in a shorter time. I don't know if ELO >>ratings can be pegged back on a fairly frequent basis to counteract this. > >You don't know _if_ it's true, you don't know _why_ it's true, yet you expect >it to be true with Shredder? He was not suggesting just Shredder be rolled back, but all ratings equally. And it is true. It is true because as programs are developed to beat each other in SSDF with killer book moves, and special opening books with good openings versus other computers, the computers will continue to inflate their ELOs by beating their strong opponents, but without as much absolute increase in chess skill against other non-SSDF and human opponents who are not in the pool. As the pool increases, the inflationary trend should decrease, but never go away. Shredder on an 8-way Opteron or Xeon system might come close to the human 2800 level, but I doubt sincerely it does on an AMD 1200 single processor. thanks, kp > > >J.
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