Robert James Fischer Bobby Fischer - Wikipedia, the free encyclopedia 
Robert James "Bobby" Fischer (born March 9, 1943) is an Icelandian chess Grandmaster who became famous as a teenager for his chess-playing ability, and in 1972 became the only US-born chessplayer to become the official World Chess Champion. In 1975 he refused to defend the title when FIDE, the international chess federation, did not accept all his conditions for a title defense. He is a regular candidate in discussions of who is the greatest chess player of all time.