Peter's z80.eu site blog
Evolution of vintage PC chess programs (until VGA was used) PART 1 
Saturday, July 2, 2016, 01:00 PM
Posted by Administrator
Before MS-DOS, CP/M rulez. And there were some chess programs like Sargon already.
A book for Sargon was published in 1978.

Unfortunately CP/M does not support graphics by default (GSX was not widely used!).
So the time for (serious) chess programs start with the birth of the IBM PC.
At the beginning, there was a chess program named "chess" (not very inventive):

It was originally written in BASICA, but it's usually found as a compiled executable only.

Later, in 1982, Psion 1 was published, and it has already nice (CGA or HGC) graphics.

One year later, Bluebush arrived the PC market, not really a strong chess game, but also has a nice look.


Look at "related link" for the BASICA (source) version of CHESS1.

I will continue this in PART 2.

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