Last Year at Marienbad
Several times in Last Year at Marienbad, the characters play a game called Nim. The gameplay is simple: a) players take turns removing objects from rows, b) they can remove as many objects as they want from a single row in one turn, and c) the player who removes the last object loses. The strategy is somewhat more difficult to understand, even though the player who goes first and follows the optimal strategy will always win. Although somewhat less glamourous than the film version, a Flash version of Nim is available to play.