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Subject: Re: piece mobility?

Author: Tord Romstad

Date: 06:37:59 01/08/04

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On January 08, 2004 at 08:39:24, Andreas Herrmann wrote:

>in my engine, mobility is one of the most powerful parts in the eval. I
>calculate it from my attack tables.

One of the nice things you get almost for free with attack tables is that it
is almost trivial to compute safe mobility rather than pseudo-legal mobility.

>Calculating attack tables is very slow, but you can use them for a lot other
>things.

How slow is the attack table calculation for you?  Do you have a couple of
test positions we could compare?  In the opening position (which is probably
not a good position, because all sliding pieces are blocked) I generate my
16-bit attack tables almost exactly 1000,000 times per second on a PIV 2.4 GHz.

Tord




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