Seido is a domino-style game from Jean du Poel and Historien Spielgalerie. The game includes a number of wooden tiles with cut edges such that, laid together, six tiles form a ring. Each tile shows two symbols (or a blank on one side), these being triangles, circles, and squares in three forms. Players roll a die to determine how many tiles will be placed on a turn, and score when they create three-way intersections of matching symbols. Also, if a player completes a circle, all other players must draw another tile. The game ends when one player places all of their tiles.