Author: Andrew Williams
Date: 08:47:09 02/11/00
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On February 11, 2000 at 10:42:12, Per Steneskog wrote: >Howdy! > >Since january, I am writing a little chessplaying program. So far it has went >rather smooth until it introduced alphabeta cut-offs. Debbuging the move-tree >shows it cut-offs and back-ups scores as expected. But I am not sure how to >produce the principal variation and how to update it. > >I have taken a look at the source of some other engines, but embarrasing I >haven't been able to solve it. Clearly the pv should only be updated when you >have a cut-off (alpha < score < beta). But how do I know I am within the pv and >at what ply? > >Sorry for asking this, I am pretty sure I would have found the answer if the >content of the archive for CCC was searchable. > >More questions will come... :-) > >Best regards >Per Steneskog a.k.a. Epor@ICC Hi Per, I think this is pretty clear in TSCP. There's a link to this excellent program in the Computer Chess Resource Centre, which you can reach via the link at the top of this page. Good luck Andrew
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