Re: KILLT & HISTORY

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Article #5142

#5142

From: Jacques Grove
Date: Mon, 21 Feb 1994 12:48

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Chua Kong Sian (nsrccks@leonis.nus.sg) wrote:

: At present, the KILLT and HISTORY heuristics overlapped (see genmoves.c).
: I would like to suggest that these two heuristics be separated.  Let
: HISTORY only refer to history data and nothing to do with killer moves.
: What this means is that in MoveList() and VMoveList(), those #ifdef
: HISTORY blocks should be commented out (or removed).

[rest deleted]

I would like to ask a question here.  Isn't the history heuristic
supposed to be much better than the killer heuristic?  I seem to 
recall an article by J. Schaeffer (sp?) some (actually many) years
ago in which this was asserted (and there were also some experimental
data given to back this up).  Is this true?  And if so, why is the
killer heuristic still in Gnuchess?


Jacques


University of Stellenbosch
SOUTH AFRICA

INTERNET:  grovej@itu.sun.ac.za  /  grovej@cs.sun.ac.za

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From: grovej@cs.sun.ac.za (Jacques Grove)
Newsgroups: gnu.chess
Subject: Re: KILLT & HISTORY
Date: 21 Feb 1994 12:48:49 GMT
Organization: University of Stellenbosch
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