Author: Uri Blass
Date: 00:34:38 04/28/01
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On April 28, 2001 at 03:29:46, Uri Blass wrote: >On April 28, 2001 at 02:08:00, Stephen A. Boak wrote: > >>On April 28, 2001 at 01:52:01, Stephen A. Boak wrote: >> >><snip> >> >>>This may indicate, for example, that there are relatively as many win, loss & >>>draw nodes, generally speaking, at each fixed ply depth, no matter how many >>>plies are calculated--even if those results are not precisely calculatable by >>>the program! Therefore the program that calculates x plies more than its >>>opponent will have approx the same increased chances to steer toward the >winning lines. [I hope you can understand the concept I am trying to >communicate.] >> >>I mean that the general percentage of calculated win nodes, arrived at by >>calculating to a fixed N+X depth, which are *not* seen by calculating only to N >>depth, may be approximately the same no matter what N is. At least during the >>opening & middle games. > >I do not believe that it is so simple. > >I believe that there are positions when program A understands better than >program B and if program A is lucky to get them then 10 plies may win against 15 >plies but 5 plies does not win against 10 plies because 5 plies does tactical >mistakes that are decisive. > >There are mistakes when some programs may do even at depth 15 when other >programs may avoid them at depth 10. > >I expect to see more wins for the weaker side at higher depthes because of this >reason. > >Unfortunately the depths that I played are not big enough and doing a match at >depth 10 against depth 15 may take a long time and I expect average of at least >some hours per game even after upgrading my hardware. I can add that my tests were only 3 against 8 plies and I even did not test 5 against 10 plies. I did today one of the 3 plies against 9 plies and I got the first 50-0 result Deep Fritz(depth 9)-Tiger14(depth 3) 50-0 Uri
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