Crystal Mosaic

Crystal Mosaic replaces the player boards with new double-sided boards and adds an overlay for each player. Wall placement follows the gray wall variant: a tile may go on any free space of its row, but no colour may appear twice in any row or column. Some spaces on both sides are pre-printed with a colour, and only a tile of that colour may go there. The floor line values change, and each side has its own scoring twist. Everything else is as in the base game.