Author: Scott Gasch
Date: 17:04:48 07/02/04
Go up one level in this thread
> >I do not understand why you assume that your move ordering is good after a fail >low. If you failed low on the first move and your move ordering is good then 90%+ of the time the rest of the moves at this node are gunna fail low too. You have a choice: you can search them all with a full a..b window or you can say "almost all the time everything else is gunna fail low too, let me save some nodes and search with a minimal window." I'm not talking about the root position here (though it's true there too). I'm talking about an arbitrary node in the search tree. >Suppose that you have a big fail low that means that you cannot save the game >after the first move in your move ordering(suppose score of more than 4 pawns >against yourself. > >It means that there are 2 possibilities: >1)You cannot save the game(what you do is not important) >2)You can save the game by a better move(in this case I suspect that it may be >better to use bigger window for the other moves in order to save the research >for other moves). > >I do not do it today but it may be a good idea to try it. > >Uri
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