Triplexity, and its sisters Triple-Triplexity, Duple, Double-Duple, and Monotony, were created in 1984. The designers had been playing Go, but couldn't find a balanced way to play three. So they created a grid composed of triangles laid into a hexagon shape, and designed Triplexity. Stones are played on the intersections of the grid-lines. The object of the game is to be the first player to get five or more stones in a row. Opponents' rows may be blocked, or their stones may be captured.The designers describe the game:'Each player must try to establish a winning position with a strong but flexible offense, while hindering their opponents' play. Every placement of a game stone on the grid increases the possibilities and the complexities.'It is an aggressive, every one for themselves game defensive alliances are short lived and not to be trusted, the timid player rarely comes out on top with each game taking generally not more than 10-15 minutes to play.' - BoardGameGeek