A board is a subset of the polygons determined by a number of (usually regularly spaced and oriented) lines. These polygons form the spaces on which "pieces" can be placed and move in many games (called board games). The simplest division the plane is into equal squares. The square board is used in tic-tac-toe. The square board is used in checkers and chess. Go is played on a board in which pieces are placed on the intersections (as opposed to the squares bounded by the grid lines) of a set of equally spaced lines on a square grid.
Hexagonal boards are used in some games. Chinese checkers uses a board in the space of a hexagram with spaces at the vertices of a regular triangular tiling.