Author: Aaron Gordon
Date: 01:01:04 10/13/04
Go up one level in this thread
On October 12, 2004 at 18:28:52, A.G.B. Bluemers wrote: >On October 12, 2004 at 09:07:44, Aaron Gordon wrote: > >>On October 11, 2004 at 19:25:22, joseph soney wrote: >> >>>Could someone please explain to me this setting. I am trying to find the >>>optimum hash setting size for Blitz games under five minutes. This Shreddermark >>>function seems to not help me at all. I have done tests with time of 5-L and >>>various hash table sizes. Here are some: 16-96 hash = 5569 score; 128-192 hash >>>= 3712 score; 256 hash = 2828 score; and last 512 hash = 1679 score. Now, you >>>would think the high score would give me the best overall playing result but >>>sadly this doesn't appear to be true. It appears to play the best at 512, but >>>may get into time trouble. Anyway, I'm more lost than ever. Could someone >>>either (a) tell me how to use Shreddermark so I can find these hash table sizes >>>out; or (b) just tell me the hash table size I need for 5 minute and under games >>>based on this configuration: Dual AMD Opteron 250, 1.5 gig pc3200 ram. >>>Thanks in advance >>>Please somebody help me. >> >>The Shreddermark is seriously messed up. Don't bother with it, it is a waste of >>time. >> >>Basically for your system the best hash settings would be 256mb in >>lightning/bullet (1 0, 2 0), 512mb in blitz games (3 0 to 14 0).. anything over >>15 0 use 1024mb. >> >>If you want to test NPS (more important is time to find the right move), or run >>test sets with different hash sizes you'll need to lock your learning file. To >>do this you'll need to rename your shredder.plr file in your Chessbase\engines >>directory. Now, go into Shredder and setup a position.. anything. 2 kings and 2 >>pawns. Start infinite analysis so it will create another shredder.plr file. >>Exit, go to your engines directory and right click/properties on the new >>shredder.plr. Set it to read-only. >you also might uncheck learning in engine options. >>Now you can do your testing with test-sets or whatever else you'd like without >>the learn file messing up the results. > >as an alternative install "shredder classic" from the cdrom.engine options:In >the engine window you can see the % hash usage. Yes, this (and actual play) was what I've been basing the hash setting recommendations on. It fills up aweful quick at 256-384mb.. even on my single Athlon XP 2.6GHz. Even on this CPU I would prefer 1gb hash for longer games.. but having 512mb ram prevents that unfortunately.
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