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Subject: Re: crafty: -DFUTILITY better / -DDETECTDRAW worse

Author: Robert Allgeuer

Date: 09:54:23 01/05/04

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On January 05, 2004 at 12:17:24, Alex Szabo wrote:

>A self-play experiment between crafty version 19.6 (19.6) and crafty version
>19.6 compiled with -DFUTILITY (19.6b) resulted in the latter being stronger than
>the former by 12 (plus or minus 2) elo rating points.  The score was: 19.6 won
>5,612 games, 8,109 games were drawn, and 19.6b won 6,279 games (for a total of
>20,000 games in the experiment).
>
>A 2nd self-play experiment between crafty version 19.6 (19.6) and crafty version
>19.6 compiled with -DDETECTDRAW (19.6c) resulted in the former being stronger
>than the latter by 21 (plus or minus 2) elo rating points.  The score for the
>2nd experiment was: 19.6 won 6,735 games, 7,734 games were drawn, and 19.6c won
>5,529 games (for a total of 19,998 games).

Interesting.
For the Crafty non-expert:
what do the symbols FUTILITY and DETECTDRAW do exactly when they are defined?

Thanks
Robert





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