Author: Dan Andersson
Date: 13:50:42 12/31/99
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Yes and no! The implemetation in the paper does. But you could easily find some other function of the board to substitute for it, I did. The first one only extended if the king was in check (easy if you use bitboards of any form), a function of the number of replies to a check and king safety. But if you use ETC the search space shrinks (giving a saving of nodes searched) as a function of a hopefully better AB window and the penalty for generating moves is not so great. But then its imperative that you implement a limit to how near the leaves you use ETC. Regards Dan Andersson
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