Author: Per Steneskog
Date: 07:42:12 02/11/00
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
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