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Subject: Re: Outside passer and candidate passer: definition wanted! :-)

Author: Robert Hyatt

Date: 13:33:31 02/27/06

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On February 27, 2006 at 15:32:49, Alessandro Scotti wrote:

>Thanks Bob, that helps a lot! I did try to figure out this stuff from Crafty but
>there were a lot of things I didn't understand before starting this thread!

There's probably a lot in Crafty _I_ don't understand any longer.  Hence the
eval lobotomy going on. :)


>
>On February 27, 2006 at 12:35:44, Robert Hyatt wrote:
>
>>You have comments from others, here is what I use:
>>
>>"distant passer" (outside passer).
>>
>>Look at all pawns on the board.  If one side has a passed pawn on an "edge"
>>(this passed pawn is either the right-most or left-most pawn on the board) then
>>that is an outside or distant passer.  The useful characteristic is that you can
>>push this pawn like crazy and your opponent _must_ use his king to stop it,
>>leaving his king away from the rest of the pawns where your king should be able
>>to wreck havoc.  Of course if your opponent has a protected passed pawn, your
>>outside passed pawn is not worth anything in a pure king-pawn ending since you
>>can never take the pawn protecting his passer while he is free to take your
>>distant passer and come back into the game...
>>
>>A candidate is just that.  A pair (or more) of pawns that can be pushed to form
>>a passer.  For example, white pawns at g2/h2, black pawn at g7.  White has a
>>pawn majority that can be used to create a passed pawn, and in this case it
>>would end up being a "distant passer" if your opponent doesn't have a passer on
>>the other wing.  The only disadvantage of a majority is time.  An outside passer
>>can move _now_.  It takes far longer to mobilize a majority and turn it into a
>>real outside passer, which might be enough to give your opponent time to do
>>something beneficial to him.
>>
>>Hope that helps...



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