Computer Chess Club Archives


Search

Terms

Messages

Subject: Re: Hash Table

Author: Robert Hyatt

Date: 14:37:34 01/19/98

Go up one level in this thread


On January 19, 1998 at 17:09:00, Stuart Cracraft wrote:

>What is the typical hash table successful percentage retrieve value?
>
>I'm looking for this number for at least one other program for a
>typical search or group of searches:
>
>	found-in-hashtable * 100
>	------------------------
>      total attempts to probe hashtable
>
>--Stuart


Depends on what you are counting, and the position you are searching.

If you are simply counting positions where the hash signature matches
what is in the table, you should get 25% and higher.  If you are
counting
positions where the hash table hit actually stops the search early due
to
a fail high/low or exact score match, this should be around 10% and get
better as depth increases.

fine #70 gets a huge percentage of hits...  but there are only king
moves
for many plies..



This page took 0 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.