Author: Anthony Cozzie
Date: 09:47:41 11/20/03
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On November 20, 2003 at 12:28:57, Marcus Prewarski wrote: >I've been completely rewriting the evaluation function of my engine >DrunkenMaster (not a strong one) because I was tired of seeing it make some >really ugly moves and I want to give it better knowledge of king safety and pins >and better passed pawn evals. When I watch it play 5 minute games against an >earlier version it seems like the evaulation is better overall. However it >seems like these evaluation changes have made the branch factor a bit worse in >several test postions I have. And it performs worse in WAC test suites which >seems to agree with my observations. I would think that improving my evaluation >function would improve the search branch factor if anything. So my question is >does this mean that my newer evaluation function is actually worse in most cases >than my old one or could it be something else like my move ordering is bad to >begin with? > > -Marcus More eval -> fewer '=' beta cutoffs. Its just a fact of life :( IIRC, Tim Foden posted some numbers where material-only GLC outsearched normal GLC by ~4 ply. Of course, it lost all its games. anthony
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