KUAN is a two-player abstract strategy game using a 5×5 grid board and two types (colors) of pieces. The players take turns placing a piece on the board. Try to trap pieces between those of a different color to capture them.

If your opponent captures some pieces, you must place your pieces on the spots where the captured pieces used to occupy. You win either by placing five pieces of the same color in a straight line or making the opponent unable to place any piece on the board.