Author: Uri Blass
Date: 00:29:46 04/28/01
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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. Uri
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