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Subject: Re: How much faster would a chess engine be if...

Author: Uri Blass

Date: 00:56:09 06/04/02

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On June 04, 2002 at 01:55:45, Russell Reagan wrote:

>How much faster would a chess engine be if it didn't have to deal with the
>special cases such as en passant, castling, promotion, etc.? In other words,
>only having to deal with moving one piece from one square to another.

simple logic says that it is not going to
change the speed significantly.

in most positions the program has no problem to see that
castling,en passent and promotions are illegal but it does not make it faster in
nodes per second.

The check that it is illegal is very simple and does not
take a lot of time even relative to
other things in the move generator.

I guess that program may be less than 1% faster without
the special cases that you mention.

Uri



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