Author: Robert Hyatt
Date: 05:03:49 04/26/00
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On April 26, 2000 at 07:14:57, Bas Hamstra wrote: > >Already tried this, of course. My point is that this takes *much* longer than >just generating all captures. In the already mentioned position, for example, >you would have to do 9 AttacksTo's before you find the *first* capture. I >measured the time: it took 3x as much time as generating all captures unsorted. > >Then I concluded the rotated bb datastructure is not fit for 1-at-a-time capgen. >Maybe premature, because with 0x88 (where this is supposed to work) would >probably suffer from the same in this position. > > > > >Regards, >Bas Hamstra. Don't forget Dark Thought. (1) rotated bitmaps; (2) does one move at a time move generation, just like chess 4.x did. I don't see why rotated vs non-rotated affects this in the least. Rotated bitmaps only make generating the attacks from a given square (with a sliding piece) faster. They don't give up any other bitmap functionality.
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