Author: Stephen A. Boak
Date: 23:08:00 04/27/01
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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. By this concept, the penalty (percent of time a losing move is selected) for a fixed ply depth 'horizon' would generally be the same, compared to an N+X ply search with a more remote horizon. In simple words, the ability to see farther ahead, may tend to discover the same number of winning & losing moves, at each extra ply depth, so the return is linear and not diminishing--at least prior to the endgame phase. --Steve
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