Z truth 000000001: There's another cautionary tale in this story... what should the proper name be?* * * * *
The original title of the program is contained in this Fall 1967 academic paper:
<The Greenblatt chess program>
https://d1yx3ys82bpsa0.cloudfront.n...
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The name <Mac Hack VI> is a portmanteau (?) of MIT's Project MAC, the culture, and the hardware (i.e. VI is for DEC's PDP-6).
In 2005 we have an interview with Greenblatt where he basically just refers to it as his chess program.
http://archive.computerhistory.org/...
(Hack appears 11 times, none in the context of "Mac Hack". OTH, PDP shows up 47 times. )
* * * * *
Which brings us to the final point in the evolution. By 1977 the program was being run on a PDP-10, and I believe the name dropped the reference to the obsolete hardware, becoming <Mac Hack>.
(Or maybe <MacHack>, <MACHACK>, etc., etc.>
If you do a google books search on <Fischer Greenblatt chess 1977> I don't think you'll see a single <Mac Hack VI> reference, at least I didn't.
One 2018 reference, which used <MacHack> (or should that be <MACHACK>?), contained a little more info:
<<>In 1975 [Fischer] refused to defend his title ... And then, surprise, he wanted to play games against a computer.Not much is known about the circumstances under which the games were played. Greenblatt was not present. No pictures were taken. The program's logs of the game have not been published. Fischer submitted the game scores to a fledgling publication, the <Computer Chess Newsletter>, without comments.<>>
<Man vs Machine - Mueller, Schaeffer (2018)>
https://books.google.com/books?id=0...
(Now, if I might make a request to <CG> - please don't lose this useful post.)