Author: Mike Adams
Date: 08:48:59 10/04/00
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I look forward to the day when Pulsar runs on a 2 gigahertz machine or better.
But two points. First i think that two programs that search the same depth
about play each other the one with the better evaluate should win. This is not
always true because even if there at the same speed if one makes better use of
extensions i would imagine it would have the advantage.
Second is that even if hardware improves greatly, in engine vs engine
battles on the same hardware if one is a more effecient searcher or a faster
searcher in nodes per second it should have the advantage all other things being
equale.
Do you have any suggestions for the obvious next thing to work on to get
more depth? I use move ordering in this order: first hash move if available,
second captures and in this i order most valuable capture least valuable piece
and if two captures score the same value by that ordering method i give a slight
advantage to one if its a recapture, third killer moves i use 2, the last two
moves that produced alpha cutoffs. I imagine i should probably play the hash
move if possible before generateing moves i think i'll try that and see if it
increases speed. I also use R2 Null Move and futility pruning in search and
qsearch.
I've done some web site research the next best thing it seems to me is to
ponder. I could also do a windowed search and history table but I havent heard
that they improve things much. Also i'm trying to improve nodes per second by
making some algorithms faster. See my post about nodes per second above for
some problems i'm having. Normal nodes per second is 15K to 30K but sometimes it
drops as low as 2K for no reason. Maybe hardware problem? Any suggestions are
welcome. I dont expect a detailed analisis of my methods and how to improve them
but if you have a couple of bullet points as to what direction to move in or
what to possibly change it would be appreciated. thanks Mike Adams
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