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Subject: Re: A new kind of "swindle mode" for Crafty

Author: Uri Blass

Date: 12:32:13 09/29/00

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On September 29, 2000 at 14:40:05, Fernando Villegas wrote:

>Hi Bob
>Well, let me give you a more detailed an idea of what I try to mean.
>Suppose the program is already in a losing track. From then on what I say is
>that he should try to put the opponent in the more tricky scenaries, not jus
>looking for the best thoeretical move to do. How to do it: maximizing the chance
>of the opponent to blunder. Example. Supose Crafty plays and has two moves and
>the adversary has three moves in answer for each of those two moves. This, of
>course, is just an example.
>Now, supose move A has the following answers: move x, score 5+; move y, score
>5,5+ and move z, score 5,9+
>Then you have move B with the following possible answers: move x1, with score
>6,7+; move y2, with score 5,0+ and move z2, with score 1-
>
>Now, in the usual way, Crafty would choose move A, as much even the best
>opponent move there is just 5,9+, but with move B the opponent has the chance to
>play x1, with score 6,7+.
>What I say is that in this field of bad scores, that kind of reasonning has not
>too much sense as anyway, with 5.0+ or with 6,7+, anyway the program is lost. So
>the idea of a swindle comes, as in human games: you choose move B because there
>there is a chance the opponent will mistake and play z2, with score 1-.

This is not so simple.
The question is if there is a practical chance that the opponent is going to
blunder.

It is possible that move A is better from practical reasons because because
after move A there is a practical chance that the opponent is going to blunder
when after move B there is no practical chance that the opponent will miss the
+6.7 move.

I think that it is not a good idea to invest time on swindle mode if you want to
win humans in regular games and it is better to invest time in preventing a  bad
position in the first place.

Ideas for swindle mode can be used only if they are good and simple to do and I
think that the idea that you suggest is not good and is not simple.

Uri



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