Tchuka Ruma, a mancala game, was first described as Tchouka by the French mathematician Henri-Auguste Delannoy (1833-1915) in 1895. He said that his article is from his correspondence with Édouard Lucas (1842-1891), another famous French mathematician and the inventor of Dots-and-Boxes. Tchuka Ruma might be inspired by Dakon, but seems to be an invention of Édouard Lucas. Probably he found an ethnographic report from Indonesia and then changed the rules of Dakon so that it would fit his idea of a mathematical recreation.