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Subject: Re: Killer and history

Author: Dan Homan

Date: 06:43:45 06/25/98

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I'm not sure the right place to jump into this thread,
but here will work...

Is the speed-up from incremental move generation the
only reason to use killers over the history heuristic?

I've runs some quick 'n dirty tests on my program (which
does not use incremental move generation... rather I
generate all the moves at once and score them for sorting
as I generate them), and the history heuristic by
itself seems superior (in essentially all the positions I
tested) to killers alone or killer+history.

Perhaps my testing was flawed (it was very quick) or my
implementation, but I was wondering if anyone else had
a similar experience.

For programs that do incremental move generation (like
crafty), killers are surely a win because they don't
need to do a full move generation if they get a cutoff.
But what about programs that don't use this approach?

 - Dan



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