[1] White Knight featured a then-novel display of principal variation – called "Best line"[2] – that would become commonplace in computer chess.
Bryant used White Knight as a basis for development of Colossus Chess (1983), a chess-playing program that was published for a large number of home computer platforms in the 1980s, and was later ported to Atari ST, Amiga and IBM PC as Colossus Chess X.
[4] Bryant later released several versions of his Colossus chess engine conforming to the UCI standard.
[6] In August of the same year it won the gold medal at the 2nd Computer Olympiad, beating Chinook, a strong Canadian program, into second place.
[7][8] Chinook's developers, headed by Jonathan Schaeffer, recognised Colossus' opening book as its major strength;[9] it contained 40,000 positions compared to Chinook's 4,500,[10] and relied on Bryant's research that had found flaws in the established draughts literature.