Mac Hack VI (1966)

Mac Hack VI, a.k.a. The Greenblatt Chess Program is a chess program that ran on the PDP-6. It was written in MIDAS and was the first computer program to play in a human tournament and be granted a chess rating in 1967. The game was inspired by the Kotok-McCarthy-Program, but improved upon it in design and search width.

• Release Date: December 31, 1966