In chess, which is considered the game of the twentieth century?

The Game of the Century is a chess game that was won by the 13-year-old future world champion Bobby Fischer against Donald Byrne in the Rosenwald Memorial Tournament at the Marshall Chess Club in New York City on October 17, 1956. In Chess Review, Hans Kmoch dubbed it "The Game of the Century" and wrote: "The following game, a stunning masterpiece of combination play performed by a boy of 13 against a formidable opponent, matches the finest on record in the history of chess prodigies.

Donald Byrne (1930–1976) was one of the leading American chess masters at the time of this game. He won the 1953 U.S. Open Championship, and represented the United States in the 1962, 1964, and 1968 Chess Olympiads. He became an International Master in 1962.

Robert "Bobby" Fischer (1943–2008) was at this time a promising junior facing one of his first real tests against master-level opposition.