"Opening Moves: Origins of Computer Chess: 2.4 Getting Going".Most Mac apps are written using Cocoa in Objective-C which, while it is a compiled language, means that there is a fair bit of information left over that could be used by a decompiler. Pearson Education, Addison-Wesley Professional (2006)."Computer History Museum accession number L02645385". Photo: Richard Greenblatt and Thomas Knight with the CADR LISP Machine at MIT, Unknown photographer.^ "Richard Greenblatt and Thomas Knight with the CADR LISP Machine at MIT".^ "A history of computer chess - from the "Mechanical Turk" to "Deep Blue" - High Tech History".Richard Greenblatt, Donald Eastlake III, Stephen Crocker. ^ "The Greenblatt Chess Program" (PDF)."Oral History of Richard Greenblatt" (PDF). : Cite journal requires |journal= ( help) Archived from the original (PDF) on 6 July 2017. "A Chess Playing Program (AIM-41 - PDF)" (PDF). "Acronyms and Abbreviations Used at MIT". ^ Snover, Janet and Bill Litant (n.d.).Greenblatt and Tom Knight went on to advance artificial intelligence and build the Lisp machine in 1973. Mac Hack was the first chess computer to use a transposition table, which is a vital optimization in game tree search. Mac Hack played by teletype, was ported to the PDP-10 and was the first computer chess program to be widely distributed. Crocker in MIT Artificial Intelligence Memo 174 and recorded some games there. Greenblatt published the program with Donald E. In 1967 Mac Hack VI defeated Ben Landy with a USCF rating of 1510 in game 3, tournament 2 of the Massachusetts State Championship. In 1967, the program played in four tournaments, winning three games, losing twelve, and drawing three. In 1966 the program was rated 1243 when it lost in the Massachusetts Amateur Championship. The PDP-6 became an honorary member of the Massachusetts State Chess Association and the United States Chess Federation, a requirement for playing tournaments. During this period the program was compiled about two hundred times.īy the time it was published in 1969 Mac Hack had played in eighteen tournaments and hundreds of complete games. Mac Hack was written in MIDAS macro assembly language on the PDP-6 computer DEC donated to MIT (the first working PDP-6, serial number 2). Greenblatt added fifty heuristics that reflected his knowledge of chess. In about 2004, he had an opportunity to tell Alan Kotok that searching the 7 best moves at each of the first two plies, and limiting the search depth to two would have done better than the default widths of "4 3 2 2 1 1 1 1", attempting eight plies in Kotok-McCarthy's REPLYS subroutine which generated each player's next plausible moves. A good chess player, he was inspired to make improvements at MIT in 19. Greenblatt was inspired to write Mac Hack upon reading MIT Artificial Intelligence Memo 41, or a similar document describing Kotok-McCarthy, which he saw while visiting Stanford University in 1965. The number VI refers to the PDP-6 machine for which it was written. Its name comes from Project MAC ("Multi-Level Access Computer" or "Machine-Aided Cognition" ) a large sponsored research program located at MIT. Mac Hack VI was the first chess program to play in human tournament conditions, the first to be granted a chess rating, and the first to win against a person in tournament play. Also known as Mac Hac and The Greenblatt Chess Program, it was developed at the Massachusetts Institute of Technology. Mac Hack is a computer chess program written by Richard D. ( April 2010) ( Learn how and when to remove this template message) Please help to improve this article by introducing more precise citations. This article includes a list of general references, but it lacks sufficient corresponding inline citations.
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