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Subject: Re: A thought about using huge physical memory for chess engine

Author: David Dory

Date: 20:20:20 02/07/04

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On February 07, 2004 at 22:03:25, Pham Hong Nguyen wrote:

>I have seen that in CCT6 Crafty used only 386 MB for hash table on a machine
>with 8 GB physical memory. It means that a huge memory (at least 7 GB) is almost
>redundant. I think in coming time, the situation will be worse: more physical
>memory could not be used for chess engines. I have been thinking some ways of
>using large size of memory and here may be one: load all 3-4 EGTBs into memory
>(near enough - need little more memory or some selections of EGTBs). Thus,
>instead of searching on HDD, we can search on memory. Some good programs (like
>Crafty) can develop some methods to look up EGTBs not only in main search but in
>qsearch.
>
>Just my two cents. :)
>What do you comment?
>+Pham

Hi Pham,

Very important to remember that Hyatt's Opteron wonderkid was a very unusual
computer, all around.

Tough to set up your engine for better use of a multiple Gigabyte memory, when
most computers only have 256Megs, 512Megs, or 1 Gig. of RAM, I think. :)

While EGTB's may be great in memory, I'd personally like to see more AI, or
planning heuristics come into our programs. As long as the search depths are
entirely excellent, along with the decreasing ability for a greater depth to
strengthen play, I think that more planning ability would be a great addition
for the chess programs of tomorrow.

David



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