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Subject: Re: Playing style of top engines...

Author: Uri Blass

Date: 14:47:51 10/18/05

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On October 18, 2005 at 17:12:05, Robert Hollay wrote:

> I apologize if this question sounds odd.
> But if it's true that chess game has a SOLUTION - the perfect chess game -
>then it should be logical that the top chess engines tends to that perfection.
>In other words, they will more and more often find THE BEST move in any
>position.

There is often more than one best move.

> If so, then their playing styles become more and more monotonous and are
>gradually moving to a uniformity.

No because there is often more than one best move.

> Weak engines have very different styles, often very aggressive, so they are
>great for weak players to play against. But newer - and stronger - versions of
>these same engines are playing in a much more cautious style (see Golem).
>Similarly, strong engines have "personalities" to make their playing style more
>interesting, but the default personality is usually the strongest.

No

The default version is usually not the strongest because programmers cannot tune
every parameter to be the best because they may need thousands of games for
that.

The pawn value in the default personality may be 100
It is possible to increase the default value to 101 or to reduce it to 99

In most cases one of this options is going to be at least 0.1 elo stronger than
the default personality because programmers have not enough time to play more
than 1,000,000 of games to detect difference of 0.1 elo.

Same for other default values.

Uri



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