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Subject: Re: how to lose pawn endgame with a pawn up.

Author: h.g.muller

Date: 10:16:42 03/02/06

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Without being able to boast an engine that can solve this, I still dare to say
that this points out a serious flaw in how computers think in the end game.
Building a table-base for this 13-men end-game 'behind the board' is probably
still asking too much. (There are 3,3 million reachable Pawn structures,
including promotions, making for a TB size of about 13GB...).

But when the situation is too complicated to built a TB for the current
position, it is customary to build a TB for a subset of the pieces likely to
occur, and use that TB for probing during the search. With Pawns clearly
separated in groups on both wings, an obvious thing to investigate would be what
happened if one of the wings was gone, since a normal search is likely to go
only deep enough to resolve the battle on one wing.

The Pawn structure on the Queen's wing has 48k reachable Pawn conformations,
together with 2 Kings that gives ~192



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