Reuben Fine (1914–1993) var ein amerikansk psykolog, stormeister i sjakk og sjakkskribent frå New York City. Han var blant dei beste sjakkspelarane i verda frå midt på 1930-talet til slutten av 1940-talet, då han avslutta si sjakkarriere til fordel for forsking innan psykologi.
«At the Warsaw team tournament in 1935, the most surprising discovery was a gangling, shy, 19-year-old Estonian. Some had never heard of his country before, nobody had ever heard of Keres. But his play at top board was a wonder to behold. Not merely because he performed creditably in his first serious encounters with the world's greatest; others have done that too. It was his originality, verve, and brilliance which astounded and delighted the chess world." – Stormeister Reuben Fine.»