The object of the game is to score the highest number of points. You achieve this by aiming to score as high as possible, and by trying to block the other player(s) or team. When the triangular board is filled or all players are blocked the game is finished.
The game contains 36 colored triangles, with all kinds of combinations. Triangles with fewer colors score more. All triangles must be placed adjacent to already placed triangles. You score by multiplying the number on the triangle with number of adjacent sides and the bonus point at the bottom of the board (if more then 1).
You either play with 2 persons or 2 teams (4 persons).
The original game published by Greystone in 1989 had 60 "trangs" and an enlarged board and was advertised to be played by 1 to 8 players aged 5 to 135 [sic].