Author: Eugene Nalimov
Date: 11:56:16 05/24/99
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Compressor is part of the distribution. It was written not by me, but by my friend Andrew Kadatch (his Ph.D. thesis was about data compression). Algorithm is not TB-specific, it was applied to compression of other multidimensional data (e.g. fax images) where the ability to quickly decompress part of the data is necessary. Sources are available at ftp://ftp.cis.uab.edu/pub/hyatt/TB/tbgen.zip, Win9x/NT executables at ftp://ftp.cis.uab.edu/pub/hyatt/TB/tbexe.zip. User interface is somewhat messy, you have to use command-line tools, and probably you'll have to write some batch files to compress the TBs. Generator was not designed to be used by the average user - it was designed to generate the entire set of TBs once, and to do that on a fast machine with a lot of RAM. I spent all my time trying to decrease size of the TBs, and to implement a good (=fast) probing code, so it can be called during search. If you can use command-line tools, I'd recommend to generate all 3- and 4-man TBs on your machine, but to download 5-man TBs, at least TBs with the pawns. Pawnless 5-man TBs are "grey area" - you probably can generate them at a machine with only 128Mb of RAM. File readme.txt is included in the distribution, at least in the archive with sources, and contains description of the process. Please don't ask me "how to" by e-mail :-(. Several commercial programs will include support of those TBs in the future releases. One program - CSTal II - already released (unfortunately, they "freezed" the version before compressed TBs were implemented; Chris promised to include compressed TBs support in the future versions). Next program to be released is Hiarcs 7.32. As far as I know it'll include full TB support, as well as some graphic shell around the generator (I did not see it and have nothing in common with it - ask them, not me). More programs will be released this year. Eugene On May 24, 1999 at 14:02:46, José de Jesús García Ruvalcaba wrote: >On May 24, 1999 at 13:00:44, CLiebert wrote: > >>On May 23, 1999 at 18:08:49, Robert Hyatt wrote: >> >>>On May 23, 1999 at 13:34:48, José de Jesús García Ruvalcaba wrote: >>> >>>>On May 23, 1999 at 13:21:01, CLiebert wrote: >>>> >>>>>On May 23, 1999 at 11:16:00, Mihnea Voloaca wrote: >>>>> >>>>>>Just wanted to know where I can download these tablebases ... >>>>>>Are there any plans to put them all on a CD? >>>>>> >>>>>>On a related topic- how do you use them in Fritz 5.32, with the Crafty engine? >>>>>> >>>>>>TIA >>>>> >>>>>Save for your time and money for downloading. >>>>>With hiarcs7.32 you could create the tablebases >>>>>on your own (all 4 p., a lot 5 p.) >>>>> >>>>>Regards >>>>>Christian >>>> >>>> You can also save the money needed to buy Hiarcs7.32, as in crafty's ftp site >>>>(tablebase section) the original tablebase generator is also included, and if >>>>you want to save download time you can get the generator and produce the >>>>tablebases in your computer. >>>>José. >> >>Does this generator pack the tbases? >>Christian > > What do you mean by "packing"? If it is compressing, yes: it has a >compression/decompression utility written by Eugene Nalimov. It gives very good >compression rate and allows decompression on-the-fly, using knowledge about the >data stored in the tablebases. > If you mean something else, please clarify. >José.
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