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Subject: Re: extensions

Author: Robert Hyatt

Date: 15:12:25 12/23/97

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On December 23, 1997 at 13:27:22, Stuart Cracraft wrote:

>
>What are the most useful kinds of extensions?
>
>I've heard of five:
>
>	singular - if one move is clearly better than all other moves
>
>	promotion threat - if a pawn moves to the 7th rank
>
>	recapture - a recapture restoring previous material difference
>
>	check - if a move is a check
>
>What other extensions are there that have proven useful?
>
>Stuart Cracraft

one-reply... extend if in check, and there is only one legal move to
get out of check...

and in the endgame, extend on passed pawn pushes to other ranks than
just the 7th, since they are a threat to run at any time...




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