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Subject: Re: Using 6-man tablebases in ChessBase (or die trying)

Author: Mike Hood

Date: 23:43:35 12/11/03

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On December 11, 2003 at 23:13:10, Robert Hyatt wrote:

>On December 11, 2003 at 23:04:27, Richard Sutherland wrote:
>
>>On December 11, 2003 at 19:40:06, Luis Smith wrote:
>>>
>>>The way understand, but I may be wrong, is that the 6 peice tablebase files from
>>>Hyatt's site are a new format and not useable by any chess engine yet.
>>
>>
>>
>>
>>That's interesting but begs the question: "What's the point"?
>
>egtb.cpp has changed.  As programs use the new code, they will access the
>new tables.  Until then, no cigar...  The files are getting bigger.  To
>access them requires new code.

The "problem", as I see it, is that Windows is a 32-bit operating system, and a
32-bit address can only access files up to 2 gigabytes in size. Some of the
6-piece tablebases contain files larger than that, so they have to be divided
into smaller chunks to be used in Windows.

Just one small question, just out of intellectual curiosity: some time down the
line, a few years from now, 64-bit operating systems might become standard. If
we wanted to revert to the old format, would it be easily possible to convert
the tablebases? Would it be a simple file concatenation to turn the multi-part
files into one mammoth file?



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