ISHIDO: There are 72 tiles, two of each combination of six colors and six shapes. At the start of the game, there are six tiles on the board representing each shape and color. To place an additional tile on the board, you must match at least one adjacent tile according to the following rules: - To match a single tile, you must match either the color or shape. - To match two tiles, you must match one shape and one color. - To match three tiles, you must match two colors and one shape OR two shapes and one color. - To match four tiles, you must match two colors and two shapes.
