Players take turns placing triangular-shaped pieces of their own color on the remaining empty spaces on the board, or else stacking one piece on top of three supporting pieces. Pieces can only be stacked if one of the three supporting pieces is of that player's color. The last player able to place a piece wins. Includes 116 solid wood triangular playing pieces, and two double-sided game boards featuring differently shaped playing areas. The different playing boards are named, "Krakatoa", "Pike's Peak", "Twin Peaks", and "Mount Fuji".

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