Ayu

Ayu is a unification game for two players: Black and White. It is played on the intersections (points) of an odd-sized square grid (board). The recommended board sizes are between 9×9 and 15×15 points. At the start of the game, black stones are placed at the intersections of even columns and odd rows, and white stones are placed at the intersections of odd columns and even rows. All other points start out empty (see images).

DefinitionsA group is a stone along with all stones one can reach from it through a series of steps onto orthogonally adjacent stones of its color.