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Subject: Re: Chessmaster in Fritz GUI?? Legal

Author: Dave Gomboc

Date: 21:16:38 07/23/99

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On July 23, 1999 at 10:52:29, Shep wrote:

>On July 23, 1999 at 07:59:11, Dave Gomboc wrote:
>
>>Just figure out where the engine is embedded in the executable and what the
>>interface to it is, and hook in there. ;-)
>
>Maybe I will give it a try, but don't expect too much (the best I accomplished
>in that field was ripping the music off most games back in the C64 area :).
>The version string should give a good hint where to look (at least CM 5500 had
>something like "The King v2.55" in its exe somewhere).

Ah, yes.  I had lots of fun on the C64 when I was a kid.  I even disassembled
parts of Sargon II back then.  They had self-modifying code to try to throw you
off, that was pretty cool.  Tracing through, some part got executed, then a bit
later it would start overwriting the earlier bit, then jump back to the earlier
part (at an address that would have given an illegal opcode -- not even a C64
undocumented instruction) and start executing the new code.

>>Okay, it is possible that they didn't compile the engine as a static library
>>within the .exe, that would make it more difficult...
>
>Still a master hacker's job, fiddling with a compiled executable. :-|

Maybe you'll get lucky, did they strip the symbol table?

>An easier way would be to use the internet connectiviy (chessmaster live)
>features, but it will only let you feed moves to the engine, not set up a
>position or change time controls etc.
>
>---
>Shep

Dave



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