Author: Ulrich Tuerke
Date: 01:36:47 02/24/99
Go up one level in this thread
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? I think that you cannot exclude such effects, because the hash table modifies the move ordering, and - at least in practice - the search result may depend on move ordering. But I would be alarmed if it happened very often that my search with hash table picks another move. >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? Seems a somewhat large win to me, because you are talking about the starting position. In early endgame / late middle game I would expect an extra ply. But for the start position ... , but I am not sure. Uli > >Thanks, >James
This page took 0.01 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.