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Subject: Re: Value of extension for pushing passed pawn

Author: Frank Phillips

Date: 12:39:22 03/10/03

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On March 10, 2003 at 14:49:30, Tom King wrote:

>Hi all,
>
>One search extension which most programs seem to use is the passed pawn pushing
>extension. When a move is made which is a passed pawn push to the 7th rank, we
>extend the search by a ply.
>
>My programs has got away without this extension for years. Or perhaps "got away"
>isn't right.. there have been losses which this extension might have prevented.
>
>Anyway, what do people think of this extension. Worth having? If so, what value
>would you attach to it?
>
>Regards (and hi to all),
>Tom
>tom@silentshark.co.uk


I find extending (passers) on the 7th rank helps - and is cheap to test for, of
course.

Other pawn extensions never worked out well in practice, notably against
Postmodernist and Crafty at CCT5 this year.

Frank



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