Author: Danniel Corbit
Date: 10:21:05 07/29/98
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On July 29, 1998 at 10:48:44, Tom Kerrigan wrote: >On July 29, 1998 at 10:06:43, Danniel Corbit wrote: > >>Let's say, for the sake of jihad, that we define sensible moves in the following >>manner: >>From a given FEN position, look at what every GM who has ever visited that >>position has done. >>From the same FEN position, let every top commercial and amateur program examine >>that position for 24 hours. >>At this point, we would have, I suspect, a small list of possible very good >>moves, a mid sized list of so-so moves, and a large list of bad moves. > >Perhaps. >I don't know what this would accomplish, and it seems like similar things have >been done by people who do opening book stuff. >Basically, what you're writing isn't really related to the topic at hand. I disagree. It is related, because I believe that an exhaustive search has very little value, and a careful analysis of the "ahem" good moves has a very high value. Here is an experiment that will demonstrate my point [I think]. Run any chess engine you like against a set of 100 arbitrarily chosen FEN positions achieved by at least 3 different GM's at least 6 moves into the game. Analyze the position for 7 plys, exhaustive. Analyze the position for 8 ply's exhaustive. See how often a move that was not considered one of the top three from previous exhaustive searches gets introduced as the new choice. I suspect it will be less than one in a thousand. If that is the case, then exhaustive searching has very, very little value. We will certainly not be able to search 12 plys exhaustive for a long time, anyway. Exhaustive search will therefore never be competitive with Alpha-Beta or any other real searching technique. So what is it's value? Only to find the rare gem that conventional searching techniques might miss. 99.99999% of the bogus games generated by the exhaustive search will be utter crap that even a 9 year old novice would not play.
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