Author: Andreas Guettinger
Date: 14:34:28 06/30/05
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On June 30, 2005 at 17:12:16, Robin Smith wrote: >On June 30, 2005 at 16:08:32, Andreas Guettinger wrote: > >>On June 30, 2005 at 11:34:18, Evgeny Shu wrote: >> >>>http://chessbase.com/newsdetail.asp?newsid=2485 >> >> >>Now this surprises me a bit: >> >>"I wasn’t really concerned about that possibility. In any case it would be >>impossible for me to tell, because Hydra plays a very different game to any >>other computer that I ever saw. Even in these six games it actually played >>differently to anything I saw in its own previous games, so it’s not easy to >>judge. But no, I don’t have any suspicions about human intervention. That’s not >>something that concerned me." >> >>A replayed the matches live on Hiarcs 9.6 and Fruit 2.1 on my 2 computers, and I >>would say above 95% of Hydras moves were suggested by at least one of them. >>Especially Fruit did very well in predicting Hydras moves. >>Therefore the sentence "Hydra palys a very different game to any other computer >>that I ever saw" leaves me a bit out in the cold. >> >>regrads >>Andy > > >Hi Andy, > >Several people have mentioned this same basic idea: > >1) "A group of PC programs can predict most of the moves of Hydra" > >therefore > >2) "PCs are about as strong as Hydra". > >The trouble is #2 doesn't follow from #1. As a correpsondence player who has >used compter programs extensively for analysis, I can say with certainty that >even with as few as 2 PC programs, if you could always pick the strongest move >between these two program's suggestions, the result is far stronger than either >program alone. You see a similar thing with test positions; program A solves >positions 1,2,3,4 and 5 lightning fast but is horribly slow or completely fails >to solve positions 6,7,8,9 and 10. Program B might be just the opposite, slow on >the first 5 and fast on the others. The trick is knowing which program to >believe if you don't already know the answer. > >-Robin I didn't want to say anything about the strength between PC programs and Hydra. I just can't see haw anybody can say "Hydra plays a very different game to any other computer that I ever saw" As to the strength between PC programs and Hydra you mentioned. I personnally believe any PC program on decent hardware would have performed (as good or even better) as Hydra. This is of course my personal oppinion. regrads Andy
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