Morelli (named for a character in Julio Cortázar’s novel Hopscotch) is played on a board divided into 13 x 13 squares and coloured in concentric bands with the successive shades of the rainbow: outermost band of 48 squares in red, through orange, yellow etc, to a single central cell in violet. Two players, Black and White, begin the game with 24 dual-coloured stones each with their colour facing up, disposed initially on the red band, and take turns to move one stone at a time. The aim is to occupy the Centre with the tower of one's own colour by completing a rotationally-symmetrical arrangement of four stones around it at any distance.