Author: Roberto Waldteufel
Date: 06:35:48 06/02/98
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>OK. The Problem is the quiet search. I accept. >Has anybody tried to learn the quiet search non qiet positions, and is >the slow down worth? > >Werner One thing that might be worth trying is to include promoting moves of pawns, possibly even moves of a pawn to the seventh rank as well. I know this has been implemented in some programs (eg Cray Blitz did this I believe - probably also Crafty, but you'll have to ask Bob). I once tried allowing the quiescence search to look at all moves of "unstoppable" passed pawns, but this proved far too expensive to be acceptable. It would solve your running pawn problem, though. I think it might be possible provided that it was only done in a very small proportion of positions - the trick is how to decide when "passed pawn" quiescence is appropriate. Just like "check quiescence", this will blow your search sky high if it is not accompanied by very strict conditions for its applicaton. Maybe something could be done along the lines of a smart preprocessing routine to try and determine if running pawns were likely to be an issue within the search depth about to be done, but this would be difficult to catch all cases. You could hope to weed out some of them, though. Just an idea to kick around, I have not implemented this myself, but it is on my "things to do" list. Roberto
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