Author: Dann Corbit
Date: 18:28:14 04/27/01
Precomputing attack tables is a snap, of course. The burning question is, how are they best utilized? I notice that nobody makes pawn attack tables. Is that because pawn attacks are too trivial to compute on the fly? What is the typical savings of attack tables compared to performing the computations on the fly? Is there any advantage to trying to compress the attack tables? Do you use attack tables against an entire side at once, or only against pieces by set or even individual chess men? Are they used in MVV/LVA primarily, or during all phases of evaluation? Obviously, knight attack tables can be performed with a single & operation, but what do you do with bishops, queens, etc, where your own man or an intervening piece can get in the way? Are they used only as a pre-test to see if the rest is worth calculating? I thought of using all your own men, &'ed together as a mask, and then clearing everything past a "pierce" mark, but that would probably be as expensive as computation of the attack.
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