Author: Sune Fischer
Date: 09:33:40 02/07/02
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On February 07, 2002 at 12:12:19, Uri Blass wrote: >1)At some point after enough plies chess is solved so the returns is 0. > >2)It is clear that if the program use 0 seconds for book moves then book has >increasing influence on the result when programs search deeper and there are >cases that the result is decided by book. > >I think that this is the main reason for expected diminishing return. I disagree, I believe it has to do with the previous distribution of how often a better move can be found at ply n+1 relative to ply n. Once you have found the correct move, searching further doesn't help. So the question is how often can the best move be found at ply n? >It may be more interesting if there is a diminishing return in the nunn match >when I believe that the result is not decided by book in these positions(I >believe that in these cases there is no obvious draw or obvious win for one >side). > >My experiments of the nunn match between fritz and Tiger showed no evidence for >diminishing returns but I did not got deeper than depth 13 and almost all my >games were at depth<=10(I did only 2 matches of 13 plies against 13 plies and 13 >plies against 12 plies and I posted the games of these matches here). > >I also posted my results at depth<=10. > >Note that I did not see clear diminishing returns relative to small depth and >the difference in rating in the nunn position between 3 and 4 plies seems to be >similiar to the difference between 12 and 13 plies and to the difference between >9 and 10 plies). What are these "nunn positions"? So you saw the same elo jump in 3-4 as in 12-13? I must say that surprizes me. >I already posted some results and chris taylor who got the games promise to >publish the results(I am too lazy to count them but I sent him the games) > >I hope that he is going to do it. >I do not remember all the results and I do not want to count again based on my >games. > >Uri
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