Author: Jeremiah Penery
Date: 02:37:21 01/24/00
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On January 23, 2000 at 19:40:47, Tom Kerrigan wrote: >On January 23, 2000 at 19:29:31, Jeremiah Penery wrote: > >>>No, the only reason you think DB has a bunch more evaluation is because Hyatt >>It has nothing to do with Hyatt. Please try to construct better arguments in >>the future. The reason I think DB has a better evaluation is that I've seen the >>games, and analyzed them. Kasparov and other GMs have said that DB was clearly >>superior to anything else they've seen. > >Of course it's superior, it searched 200M NPS. Searching has the property of >"adding knowledge" to a program. How do you know that you were seeing evaluation >function terms in those games, and not tactics that are so deep that they're >hidden to humans? So why didn't he think this of DB-1? It did about 100M NPS, but he ended up crushing it (see game 6 of the first match). The NPS didn't seem to help so much there. Obviously, there was a lot more knowledge in DB-2. >>>keeps saying that it does. But none of us has any proof that DB has more >>>evaluation than CS Tal. And Hsu doesn't even think it has more evaluation, >>>because his estimate translates to at least 20k NPS. >>That was an estimate. He could have very well been way off, though it's not >>that likely. Now that I think about it more, it _is_ likely. See below. >Right. If anything, I suspect the estimate is high. Hsu made the estimate to >compare the DB chip to general-purpose computers. The higher the estimate, the >more impressive his work sounds. I'm not saying that Hsu is a liar, or >misestimated on purpose, but I think it's unlikely that Hsu erred on the side of >DB chips doing LESS work. Take some generally-used evaluation terms. How many instructions does it take to apply them, on average? At least a few? At worse a few hundred? Now take some not-so-generally-used terms. E.g., which pieces attack squares around the king, including attacks through any other pieces and batteries/x-rays; potentially open files; anything else they were doing that might be expensive. How many instructions for these? A few thousand, maybe? More? With some 8k terms in their evaluation, each term would have to be carried out in an average of 5 instructions to equal Hsu's 40k. How much can you do in 5 instructions? Not much. It's likely he erred on the side of DB doing less work by a large margin.
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