Author: Andreas Guettinger
Date: 15:36:23 11/25/02
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On November 25, 2002 at 17:47:02, David Rasmussen wrote: >On November 25, 2002 at 17:01:30, Andreas Guettinger wrote: > >> >>SEE and pruning is not exactly the same. > >I know... > >>I use the same SEE in quiescence search >>and in normal move ordering, but pruning i do obviously only in quiescence, >>because I don't want to miss any moves in the normal search. (As far as I know, >>it's similar in Crafty, as I read many Crafty CCC postings which helped me >>implement my SEE). > >Sure. I was talking about this kind of futility pruning in quiescence search. I >guess it could have been clearer. > >>Pruning in quiescence can be done in account of the score you get from SEE. The >>scores you get from SEE are accurate. > >That depends on your SEE. The scores you get from Crafty's SEE are not accurate >always. It doesn't take into account absolute pins etc. This is the core of my >question. That is why I asked at all. > >>You can then decide below which threshold >>you want to prune the moves in quiesece. I currently prune all moves that give >>me a negative score in SEE. >>Pruning in quiescence can be optimised by experimentation. But quiescence is >>very leaky by itself, since only captures are followed, so accuracy is not >>needed for pruning. >> > >That is debatable, at best. > >/David Ah, please be patient with me, now I got your question. :) But I doubt if it does matter. But at least now you have a bigger thread, and people will see it. regards Andreas
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