Author: James Robertson
Date: 21:59:56 05/29/99
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On May 29, 1999 at 23:49:47, Melvin S. Schwartz wrote: >What do you think Mr. Hyatt means when he says: > >"If program A on hardware B beats program D on Hardware E - does that say much >about A compared to B? This belies the principles of science - you have to have >a uniform platform for all participants to make any kind of judgement". Yes.... if out of the blue you play program A on hardware B vs program D on hardware E you have no clue how the program's relate to each other. But..... Say, hypothetically, that program AChess is rated 2000 on a P90. Then suppose AChess on a P90 plays AChess on a P200, and loses by 60%. That would put AChess on a P200 rated about 2100. Now we have some concrete evidence; AChess on a P90 is 2000, AChess on a P200 is 2100. Now suppose we play AChess on a P200 against BChess on a P90, and AChess wins by 60%. That puts BChess' rating at 2000. We have discovered BChess on a P90's rating, and we have used uneven hardware. We will reliably be able to predict a ~50-50 score vs AChess on a P90 vs BChess on a P90. Do you see how this works? Uneven hardware does not compare programs, it compares program's on a certain hardware. James > >Now, I understand that to mean exactly what I have said over and over again. And >that is simply the fact you have to have chess programs running on the same type >of hardware to make a proper judgement. Now, isn't that what Mr. Hyatt is >saying? Or perhaps you feel this is the first time he is wrong and you are >right? > >Mel
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