Author: Robin Smith
Date: 14:12:16 06/30/05
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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
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