[TUHS] unix v4 tape found

[Adam Thornton via TUHS]

"cubic" exists both here and on the v7 I have.  There don't seem to be
sources, though, at least not in the obvious places.

I went looking online, and didn't find much besides Patashnik's 1980 paper
(the acknowledgements there are a lovely rogues' gallery of exactly who'd
you'd expect).

I think (based on the oral history interview) that cubic here is probably a
Ken program.

I was playing with it, but trying to keep the board state in my head rather
than on paper (which was a mistake) and was intrigued by the fact that it
found a forced loss for me and laid it out for me.

My question is, do the sources to "cubic" exist anywhere?

Adam