Author: Ray Banks
Date: 10:44:27 11/21/04
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On November 21, 2004 at 12:18:21, Joshua Lee wrote: >Your machine defaults to 512MB but you can change it to 1GB right? >I'm sure it can use more than even one GB but how much exactly i don't know. Not sure, I haven't tried it. But I seriously doubt you'd see any benefit from anything greater than 512MB This is Fritz's help file has to say: =========================================================================== Hash tables are memory areas in which the program can store positions and evaluations while it is calculating the moves of a game. If the program encounters the same position again, it can simply take the evaluation from the hash tables, rather than analysing the position all over again. Hash tables increase the playing strength of the program considerably. This is especially true of tactically strong engines like Fritz, Junior or Nimzo. Some run at well over 500,000 positions per second, and will fill the hash tables very quickly. After that, the search slows down. This is not the case in a slower, positionally oriented program, which processes less positions per second, and takes much longer to fill the hash tables. For slower time controls and deep analysis the engines need large hash tables. Tournament games with an average of three minutes (180 seconds) per move would ideally require over 256 MB for the hash tables. On blitz levels four to 64 MB is enough. Some engines work best with hash tables sizes that are powers of two. This means that 64 MB of hash tables is much more valuable than 63 MB. Hash table sizes are set in the "Load engine" menu.
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