Author: Robert Hyatt
Date: 07:46:57 04/25/02
Go up one level in this thread
On April 25, 2002 at 06:52:58, Uri Blass wrote: >On April 25, 2002 at 06:08:03, Sune Fischer wrote: > >>On April 25, 2002 at 05:24:52, Uri Blass wrote: >> >>>I do not know why do you suspect that it is more. >> >>Because I have not tested how Chezzz's strength depends on hashsize, and 6 elo >>doesn't sound like a lot. >> >>>In the second game(10 hours per game) movei is losing the endgame against chezzz >>>so it is 1-1 >>> >>>The previous movei also lost the game with black(10 hours for game) and I think >>>that the latest version played better. >>> >>>I will stop these long time control games and I will try to implement some very >>>small opening book only for the first move and learning to change the first move >>>in every game so movei will be able to play a match of 4 games without repeating >>>the same game twice. >>> >>> >> >>If the point is to prove you have a method that is better than hashing, then I >>think you should give your opponents a decent size hash. > >I did not say that I have a method that is better than hashing but that I am not >going to use hash tables in the way that they are used today by chess programs. > There is only one way they _can_ be used in an alpha/beta search. Otherwise what you will be doing can not be called "transposition/refutation" which is the proper name for "hash" tables. >I also think that 8 mbytes is a decent hash and the difference between 8 mbytes >and 128 mbytes is small(I also cannot use 128 mbytes in my p800). > >I remember a claim by programmers that doubling the hash tables give 6-7 elo and >I do not remember a claim that it is dependent on the time control. > Your number is wrong. It depends on a lot of things. But one thing can be easily proven. Changing the hash size can make the program reach a specific depth more than 2x faster. And >2x is > 50 elo. >> >>An opening book is a good idea for that reason. I don't want a huge book because >>I want the engine to play the game itself, the opening included. >> >>-S. > >I agree and I also never liked the idea of a huge opening book. > >Uri Depends on where you play. On ICC you will get killed with a small opening book...
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