Author: Robert Hyatt
Date: 19:05:54 04/26/00
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On April 26, 2000 at 19:17:31, Roberto Waldteufel wrote: >On April 26, 2000 at 07:53:17, Robert Hyatt wrote: > >>On April 26, 2000 at 04:40:15, Roberto Waldteufel wrote: >> >>>Hello all, >>> >>>Some time ago I wrote a chess program called Rabbit, and after a long period of >>>inactivity I have started working on it again. At present it does not have >>>tablebases, and I would like to add this capability to it. I know that Dr >>>Nalimov's tablebases are available for download from Dr Hyatt's ftp site, but my >>>main problem is not knowing how to access the data from them. I expect that >>>source code for this will be in C, which is not the language I use for >>>programming, so I really need either to understand the precise formula for >>>looking up a position or else to obtain a compiled version of the access code >>>that my program could call. My target platform is Windows on a P3/450, so a DLL >>>would be perfect for this. I wonder if such a DLL exists, and if so where can I >>>find it? Alternatively, is there public information about the position --> >>>address mapping of sufficient detail to allow me to program the lookups myself? >>>Any help would be most welcome. >>> >>>Best wishes, >>> >>>Roberto >> >> >>Your best bet is to look at his probe code, written in c++. If you are using >>a compiled language, it ought to be possible to call this stuff from within >>your program. > >Thank you for your reply. I use a Powerbasic compiler, which can certainly cope >with calling external functions and subs from other .exe/.dll files. Since I >last worked on Rabbit I have written a grandmaster level checkers program (now >released), and for tablebase access in that I call a lookup function in a dll, >supplying position information as parameters. I had the same problem there at >first - there was public domain C-code for the accesses, but I needed something >I could call from inside my own program. Fortunately I found someone who was >willing to write me a dll for lookups in exchange for a freebie copy of the >program. I would be interested to get the probe C-code in case I can make enough >sense of it to rewrite it in powerbasic, or else to find a way to have it >compiled in such a way as to be able to call it externally. > >Best wishes, > >Roberto the file tbgen.zip (on my ftp site) has the source code for the probe stuff, plus some minimal documentation on how to use it...
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