Author: Sune Fischer
Date: 10:39:47 06/19/04
Go up one level in this thread
On June 19, 2004 at 12:23:15, Gian-Carlo Pascutto wrote: >On June 19, 2004 at 12:19:02, Robert Allgeuer wrote: > >>Yes, I confused the two. But how would an engine measure how full its hash >>tables are; looks difficult to me? Furthermore this would mean that in most >>engines - as they do not clear hashtables after each move - this value would >>have to approach 100% during the course of a game, which I did not observe >>for a single engine so far. > >Positions pertaining to a previous search are not counted. i.e. For the >purpose of this statistic you can consider the engine to *do* clear the >hashtable after each move. > >At least this is how it works in Sjeng, but I suspect most engines work >like this. Yes it seems there are two ways of doing it. I do not reset the counter, mainly because when doing analysis and moving back and forth it's quite obvious a lot of hash information is being reused between moves. Ie. changing the age flag does not render all entries useless. In a game that means it's going to climb to 100% eventually, which isn't really what I want. When having to choose though, I'd have to say that I just don't pay very much attention to the different counters during a game, except perhaps the nps. Probably a matter of taste, it could be made user adjustable very easily although perhaps that's a bit technical to ask of the user. -S. >-- >GCP
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