Author: Ralf Elvsén
Date: 16:21:18 02/11/02
Go up one level in this thread
On February 10, 2002 at 19:49:01, Miguel A. Ballicora wrote:
>I never understood what the people is doing with the mate values, I always
>get confused. I am glad that I came up with my own approach before I asked or
>saw any post about it. :-)
>
>What I do in pseudo code in Gaviota is
>
>search (alpha, beta)
>{
> adjust_in (&alpha, &beta); /* increments alpha += 1 and beta += 1 if they
> are positive mate values, do the opposite if
> it is a negative mate value */
> probe_hashtables_normally()
>
> loop { /* normal alpha beta stuff */
> makemove();
> value = search_moves_for_best_value(-beta, -alpha);
> unmakemove();
> best = keep the best value;
> }
>
> store_in_hashtables_normally();
>
> adjust_out(&best); /* decrement best -= 1 if it is a +mate value
> increment +=1 if it is a -mate value */
> return best;
>
>}
>
>And basically, I do not do anything else. I store in the hashtables without
>any change. adjust_out() it is used too when I return early.
>
>Regards,
>Miguel
Here's another one who is doing the same thing :) It is really
simple and clear. My functions are called "upstep" and "downstep" :)
Ralf
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