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Subject: Re: What would be better for analysis?

Author: William Penn

Date: 08:51:41 11/01/05

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On October 31, 2005 at 17:10:10, William Kerr wrote:

>Hi,
>
>If you had the choice of running one top program on a CPU that ran at 3x speed
>or three different top programs each running on one CPU at x speed. Which would
>be better for analysis or game play. In the 2nd case one could vote on the
>choice of move if two out of three programs pick the same move.
>
>
>Pondering regards
>Bill

Choose the three programs (engines), and have each perform 3-5 lines of analysis
(multi-PVs), then choose the move which ranks the highest overall. They will
usually agree when the best move is a pawn or more better than its competitors.

How long should you let each programs (engines) run? It depends on the relative
rankings of the candidate moves. If the best move is a pawn or more better than
its competitors, maybe an hour is long enough.

Rule of thumb is to let the software (engine) examine at least 5 billion
positions (nodes) if you are looking for the truth in chess. Depending on the
speed of your computer that can take several hours for each program (engine)
run. That's the ideal but in practical circumstances there may not usually be
that much computer time available!?

That's probably best in most cases. But occasionally only a deep long search can
find the best move, in which case you pick your best program (engine) and let it
run til the cows come home... :)

WP



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