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A cube is a three-dimensional solid object bounded by six square faces, facets, or sides, with three meeting at each vertex. The cube can also be called a regular hexahedron and is one of the five Platonic solids. It is a special kind of square prism, of rectangular parallelepiped and of three-sided trapezohedron. The cube is dual to the octahedron. It has cubical symmetry (also called octahedral symmetry).

Backgammon is a two-player board game played with counters and dice on a tables board. It is the most widespread Western member of the large family of tables games, whose ancestors date back nearly 5,000 years. Backgammon involves a combination of strategy and luck from rolling dice. With each roll of the dice, players must choose from numerous options for moving their pieces and anticipate possible counter-moves by the opponent.