A chess variant for 2, 3, or 4 players. Orbital Chess is played on a large circular board which is assembled from four large puzzle-piece style segments. The board is double-sided, with one side being used for two and four player games, and the other for three player games. There are separate rules folders for three player and two/four player games, plus folders with standard chess rules. As there are four sets of chess pieces, the game also includes two standard chess boards for regular play.Copyrights are listed as 1969, 1970, and 1973 so there may be earlier releases. - BoardGameGeek