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Subject: Re: Recapture Extension

Author: Tony Werten

Date: 01:59:14 01/11/02

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On January 11, 2002 at 04:43:58, Ulrich Tuerke wrote:

>Hi Bas,
>
>>...
>>- only recaps to same square
>>- the cap-recap sequence must have same material gain
>
>Why this ?
>I'd thought, that the idea is to follow forced lines deeper (e.g. capture and
>subsequent re-capture of a pawn). Otherwise the program could use these
>recapture sequences to shift events beyond the horizon.
>
>Thus, I would rather think of sequences, which do not disturb the material
>balance.

That's an addition that limits the extensions even more: Material ballance must
be higher than alfa-2 pawns and smaller than beta+2 pawns.

>
>When you restrict these to material wins, it seems to me that you are thinking
>of avoiding traps ?

He doesn't. He means that the captures must have the same value. ie oppo takes
knight, I take bishop, or oppo takes rook I take rook.

Tony

>
>Uli
>
>>- no more than 1 extension in a row
>>...



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