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Subject: Re: why write a fast chess program ?

Author: Uri Blass

Date: 00:21:47 08/18/02

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On August 18, 2002 at 01:46:37, Engin Üstün wrote:

>On August 17, 2002 at 23:07:08, Vincent Diepeveen wrote:
>
>>On August 17, 2002 at 15:02:45, Engin Üstün wrote:
>>
>>using 1-5 moves a position and ignoring the
>>rest will give a 1500 rated engine because you might miss
>>that mate in 1, or miss you lose a piece in 2 ply.
>>
>>Is that what you want?
>
>do you really believe that a GM calculate thausends and millions of positions to
>find the best move ?
>
>do really believe that GM is stronger then amateur while he search faster ?
>
>i don't believe it!

GM's miss tactics that computers have no problem
to find because of their algorithm.

I believe that it is possible to prune more but considering only 1-5 candidates
moves in the first plies is a big mistake.

I am not a GM but one of the things that helped me to get rating of about 2000
at tournament time control is trying to look at every move for depth 1 in order
not to miss a move that I could play or to miss a move that my opponent could
play in reply to the move that I play.

I believe that there are also GM's that do it at tournament time control and if
they do not do it the idea may help them to get better(based on reading books
there are still cases when GM's do a mistake simply because they did not
consider a move that they could play or the opponent reply and wasting a small
part of the time only to look at the legal moves can help them when they are not
in time trouble).

They cannot do it for bigger depth at 120/40 but the reason is simply that they
are not fast enough.

It is better to teach programs things that GM's know about search(for example
better extensions rules) and not to teach them to forget ideas that GM's do not
use because of lack of time.

Uri



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