Significant Software Developed
He was the main implementor of Maclisp on the PDP-6. He wrote Mac Hack, the first computer program to play tournament-level chess and the first to compete in a human chess tournament. AI skeptic Hubert Dreyfus, who famously made the claim that computers would not be able to play high quality chess, was beaten by the program, marking the beginning of "respectable" computer chess performances. In 1977, unbeaten chess champion Bobby Fischer played three games in Cambridge, Massachusetts against Greenblatt's computer program, and Fischer won all of them. Greenblatt, along with Tom Knight and Stewart Nelson, co-wrote the Incompatible Timesharing System, a highly influential timesharing operating system for the PDP-6 and PDP-10 used at MIT.
Read more about this topic: Richard Greenblatt (programmer)
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