| 摘要 |
The invention relates to a three-dimensional puzzle whose outer layer is divided into a series of elements some of which are movable. The movable elements of at least two different shapes are arranged in n = 6 or 4 mutually intersecting circular rings encircling the puzzle. The rings run according to great circles determined on a sphere by its intersections with planes that are parallel to faces of a regular dodecahedron or octahedron circumscribed around the sphere. In the spaces between the rings there are additional single filling elements of at most two different types (3 n ) and (7 n ). They are immovable and constitute the outermost elements of the central base body. The movable ring pieces (4 n ) and (5 n ) are interlocked with them and with each other with the help of extensions (8 n ), (9 n ) placed on their back invisible sides. A principle of the puzzle operation consists in sliding relocation of the movable elements through sequential rotations of the rings around the puzzle centre through an angle of 360/(n-1) degrees. In particular, the invention concerns the puzzle resembling a standard football, that is a solid consisting of 12 pentagons and 20 hexagons as well as some other polyhedral solids and their spherical equivalents. In a version representing the typical football the hexagons are created from the movable triangle elements (46) and from halves of the movable rhomboidal elements (56). The ring movement consists in simultaneous relocation of the rhomboidal (56) and triangular (46) elements alternating in the ring. The invention also relates to a method of determining the geometrical shape of the puzzle pieces. |
