Author: Larry Griffiths
Date: 04:57:24 02/24/99
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On February 23, 1999 at 23:42:41, James Robertson wrote: >I have added what I think are hash tables. But, there are several things that >have me worried: the biggest is that the pv will often change, e.g. in ply 6 >without hash tables one move will be chosen while in ply 6 with hash tables >another will be chosen. Is this normal? >From the starting position I am getting maybe 31% hash hits if the q nodes are >not counted. >I am getting almost 1 ply extra on average if I set the tables to 2 ^ 18 >entries. Are these normal? > >Thanks, >James James, I also get about one extra ply out of my hash table. My hit ratio's are anywhere from 10% to 50% with the average probably around 20%. I do not clear hash tables between moves. I also experience different moves being chosen with and without the hash table but I am guessing that this is due to cumulative scoring of moves at each ply. (The way I currently Score). Larry ::-) (Four Eyes)
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