Author: Don Dailey
Date: 12:24:11 01/02/98
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>The point is to find out if in the normal playing style Genius does >asymetry in the first plies or not. I suppose Thorsten can find >positions where this is obvious. Give him some time to publish such >positions. It's my understanding that Genius has a full width base. I do not believe there is any asymetry going on here at all. It may appear that way because if you lose several ply of search on a problem because of asymetry it will not be obvious why. But it's my opinion that any problem is guaranteed to be solved eventually by Genius. It's my belief also that it's wise to construct your program such that it is guaranteed to improve with time and depth, and that there should be no problem it could not eventually solve (although it could take billions of years with current hardware.) A program that prunes at all levels will not have this behaviour is guaranteed to fall behind with age and better hardware. With recursive null move a program "in principle" increases its "full width" depth on each iteration. This is good, and part of the success of null move pruning. I say "in principle" though because this is not entirely true. -- Don
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