The game has its roots in the games of "Latin Squares", invented by the [[Swiss]] mathematician, Leonhard Euler, in the 1780's. He developed the idea of arranging numbers in such a way that any number or symbol would occur only once in each row or column. | The game has its roots in the games of "Latin Squares", invented by the [[Swiss]] mathematician, Leonhard Euler, in the 1780's. He developed the idea of arranging numbers in such a way that any number or symbol would occur only once in each row or column. |