Tic-tac-toe programs and example games
A note on the first page from Knuth indicates that this was his first "large-scale" computer program. It is dated Summer 1957. It includes listings for Brain II, Brain III, and various other game versions, such as games played between Brain II and Brain III.
Knuth, Donald E.
||Knuth cataloging system
Donald E. Knuth papers
Gift of Don Knuth