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Subject: Re: Nero 4 has now 'Chaotic' play feature...

Author: Dan Homan

Date: 13:38:15 10/06/98

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On October 06, 1998 at 07:57:51, Jari Huikari wrote:

>On October 05, 1998 at 12:05:39, Jari Huikari wrote:
>
>>On October 04, 1998 at 05:27:00, Alessio Iacovoni wrote:
>
>>>Why don't chess programs automatically implement a random chess feature changing
>>>(by some say .05) the evaluation algorithms?
>
>(I think some other programs are also having this. Are they?)
>
>I created a new command 'VARY' to Nero 4. It can be switched off and on.
>When ON, Nero makes by change one of the best moves. Possible moves to
>be made are those which have at least the value Bestscore-0.2*pawns...
>When OFF, the best move (according to Nero!) is always made.
>
>I don't know how "make 2nd best" is done in other programs, or "random" e.g.
>in Genius 2, where I have seen that option. Perhaps someone could tell me.
>
>Download address of my program is  http://www.math.jyu.fi/~huikari/NERO4.ZIP
>
>					Jari

To find the second best move... first find the first best move, eliminate
it from the list of possibilities then search again to find the next best
move.

I don't know how Genius does a 'random' feature... but one idea is to have
your program add some small random number to your evaluation of each position
at the leaves of the search tree.

 - Dan



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