Author: Robert Hyatt
Date: 18:23:28 05/29/04
Go up one level in this thread
On May 29, 2004 at 11:10:47, James Swafford wrote: >In a recent post, Tord suggested setting a flag in >the search when the hash table suggests a fail high, and >testing whether the search would indeed fail high. > >The idea seems so simple I'm embarassed I haven't thought >of it before. :) > >I've been 'pretty sure' for a long time that I've got some >nasty hash bugs. I'm in the mood to exterminate them. > >Last night I implemented Tord's idea and, to my dismay >(but not to my surprise) my hash table is saying 'fail >high' when the search wouldn't have failed high. And- >it doesn't take very long. :) This is _not_ necessarily a bug. Your hash table entry can have a draft > depth, while the real search you will do will only go to depth. A deeper search might say fail high while a shallower search fails low. That test is no good... > >This seems like a nasty thing to debug. I'm comtemplating >how I might go about it. I'm hoping some of you can >provide some suggestions... > >-- >James
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.