Schach is a chess program initially written in FORTRAN (version 1), later ported to ALGOL (version 2) and x86 assembly for DOS (version 3). Version 1 played in the American computer chess tournaments (1970, 1971 and 1972). Version 2 played in six World Computer Chess Championships between 1980 and 1986. Version 3 played multiple local European championships and international computer chess and microcomputer chess tournaments between 1991 and 1997.
Chaos is a chess program written in FORTRAN. The name is an acronym for "Chess Heuristics And Other Stuff". The program participated in 12 North American Computer Chess Championships and four World Computer Chess Championships.