8 × 8: A Chess Sonata in 8 Movements is a 1957 American experimental film directed by Hans Richter, with contributing work by Marcel Duchamp and Jean Cocteau that was released on March 15, 1957, in New York City. It features original music by Robert Abramson, John Gruen and Douglas Townsend.

Described by Richter as "part Freud, part Lewis Carroll", it is a fairy tale for the subconscious based on the game of chess. "8 × 8" in the title refers to the layout of a chessboard.

While living in New York, Hans Richter directed two feature films, Dreams That Money Can Buy (1947) and 8 × 8: A Chess Sonata in collaboration with Max Ernst, Cocteau, Paul Bowles, Fernand Léger, Alexander Calder, Duchamp, and others, which was partially filmed on the lawn of his summer house in Southbury, Connecticut.