Computer Chess Club Archives




Subject: Fail-hard, fail-soft question

Author: Dan Honeycutt

Date: 08:38:44 05/06/04

Yet again I apologize for asking a question which I'm sure has been asked many
times before, but could someone explain the difference between a fail-hard and a
fail-soft and how does is affect a PVS search?

I made the guess that, ie, if (score >= beta) if I return score it's a fail-hard
and if I return beta it's a fail-soft.  It would seem that what I return doesn't
so much matter as what I put in the hash table.  If I put in the (possibly)
higher value of score then I have a higher lower bound and a greater chance for
a hash cut if this position arises again.

Thanks in advance.
Dan H.

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.