Author: Robert Hyatt
Date: 02:39:40 08/12/98
Go up one level in this thread
On August 12, 1998 at 00:49:28, Francesco Di Tolla wrote: >>So it really doesn't matter whether the operator selects opening moves at the >>instant the game is played, or months before, as the human is still making the >>choice. > >I don't agree: if you let the program do it, to play different against each >player you have to put in the knoweledge (like a database of games) and code a >selection algorithm. I think this would be interesting to see. > >>In most events, after the first move is played, the human can not participate >>any further, ie it would be illegal for me to do anything to Crafty after white >>plays his first move. Prior to this, I could certainly enter commands that say >>"if he plays e4, play e6, or if he plays c4 play Nf6", but after the game is >>started, rules generally do not allow the human to take any active role in the >>game. I'd hope the Rebel vs Anand games were played in this way, otherwise it >>certainly is at odds with how such matches have been played in the past. > >This is the point! >May be I'm wrong, so I would apologize from now already for starting the thread, >but what do you get from the followin sentence from the commentary (by Jeroen >Noomen) on game 7 of the match Rebel-Anand after 1.d4 d5 2.c4 Nc6: > >"I chose this opening because I wanted an unbalanced >game for Rebel, relying on the surprise value. Playing a Queen's Indian >or a Queen's gambit instead, was probably exactly Anand was hoping for. >He knows too much about this opening, so lets play unorthodox!" > >and at move 3 > >"A small success: Anand avoids the main theoretical lines, starting with >3 cxd5, 3 Nc3 or 3 Nf3." > >Am I misunderstanding it? > quite possibly. IE In crafty, I have a small "books.bin" file where I (or anyone) can include moves they would like crafty to choose from. IE something like this: 1. e4! 1. d4! If those are the only two lines in this file, then as white, Crafty will *always* play e4 or d4 and nothing else. But I set this once and leave it set forever unless I decide to add another move or two for more variety. Many programs have a "weight" attached to each move, inserted by a human (Jeroen in this case). This weight controls the frequency that move is chosen. He might have meant that his "weights" were set to prefer this move or variation, but this could have been done before the match or game, as opposed to during the game. I'd suspect this is what he meant, but am not sure... This is certainly the way Bert Gower and I worked on Cray Blitz... we prepared openings all year so that we would never repeat a game from prior years and get "out-booked". But we did it with this same sort of "mini-guidance book" rather than trying to interfere while the game was in progress, which would be illegal in ACM/ICCA events... >regards >Franz
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