Computer Chess Club Archives


Search

Terms

Messages

Subject: Programming problems with PV

Author: Jan Pernicka

Date: 03:58:44 05/18/00


 Hi,
I have to face this problem:
 When using aspiration search at the root with window <eval-100,eval+100> I
occasionally get fail high - for example when I have found a mate. Problem
is when the returned score (let's call it S)is actually the exact value of my
position - in this case I do a research with window <S,+infinity> but
I'm unable to set PV properly at that ply - and if it's last ply of the search
PV is wrong... (e.g. showing PV not leading to mate even though returned score
says it will be mate...).
  I set the PV in the tree when:
    1) I got cutoff
    2) eval()>alfa
Thank you in advance for your suggestions.
 Jan



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.