Author: Johanes Suhardjo
Date: 15:10:15 02/19/99
In the past, my pondering is just like my search, only it's done when the
opponent is thinking. Recently, I changed it so that when pondering there's
no null move, no pruning, nothing risky, just plain alpha-beta. The idea is
that maybe I can catch some positions that I miss in the regular search.
After reading some discussions on CCC, I start thinking that my pondering may
not be a good idea because the resulting hash entries may conflict with the
hash entries from the regular search. I don't know how to check if this is a
good or dumb idea because I have only one computer so I can't play with other
programs with pondering on. Yes, I have an account on FICS (parrot), but the
opponents there are very unpredictable, one day I may get lowly rated
opponents that play very well, the next day I may get the opposite, not to
mention that playing styles affect the outcomes of the games.
On a related issue, one idea that I'm trying is to use different alpha-beta
windows at the start of search when the position is tactical and when it is
not. Running this on test positions certainly give better results, but in
real games I suspect the results are slightly worse. That may have something
to do with inconsistencies in hash entries from different stages of a game.
I keep the hash tables all the time, maybe I should clear the hash tables
at the beginning of the search. I definitely have to test this.
Any comment/suggestion?
Johanes Suhardjo (johanes@farida.cc.nd.edu)
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