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Subject: Re: LG2000 vs Crafty more results

Author: blass uri

Date: 07:01:20 05/26/00

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On May 26, 2000 at 09:10:46, Mogens Larsen wrote:

>On May 26, 2000 at 08:06:11, blass uri wrote:
>
>>I do not understand.
>>
>>If a program changes its mind it is because the evaluation of the new move is
>>better than the evaluation of the old move.
>
>If a program changes its mind it is because the new move _appears_ to be better
>than the old move. Without an extra ply or full iteration you can't be certain
>that the new move really is better.


You cannot be certain with a full iteration that the new move is better but in
most of the cases it is better.

It is possible that a program chooses a worse move after another iteration
because it "believes" that the move is better but the move is worse.

 In some cases the new move might be a lot
>worse than the old one and I don't think it's unusual.

If we agree to define a better move as a move with a better evaluation then the
new move is always better than the old move and it is not important if the
program did a full iteration.

Uri



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