A three-dimensional puzzle having a plurality of puzzle pieces capable of being configured in a spatially integrating manner to form a three-dimensional structure, said puzzle pieces capable of being manipulated between a solved configuration and a unsolved configuration by relative movement thereof, said puzzle comprising:
- a plurality of rigid three-dimensional puzzle pieces having no moving parts, each of said plurality of puzzle pieces having a plurality of faces, said plurality of puzzle pieces including first and second puzzle pieces;
- said first puzzle piece having at least one face defining a recessed channel;
- said second puzzle piece having a stud projecting from at least one face thereof;
- said plurality of puzzle pieces capable of being selectively transformed between said solved configuration wherein all of said plurality of puzzle pieces are proximally located and form a three-dimensional structure, and said unsolved configuration wherein every possible said solved configuration and said unsolved configuration includes at least two said puzzle pieces which remain proximally located;
- said solved configuration including at least one fully interlocked piece unit, said piece unit consisting of one or more of said plurality of puzzle pieces;
- wherein transformation of said puzzle pieces between said solved configuration and said unsolved configuration involves movement of said puzzle pieces including at least one series of piece moves along agonic paths, said at least one series of piece moves including at least one set of required piece moves constituting moves required to achieve transformation, said required piece moves each consisting of an uninterrupted relative movement of a first piece unit relative to a second piece unit, said first piece unit consisting of one or more of said puzzle pieces wherein the relative position of each puzzle piece is maintained with respect to any other puzzle piece within said first piece unit during said required piece move, said second piece unit consisting of one or more of said puzzle pieces wherein the relative position of each puzzle piece is maintained with respect to any other puzzle piece within said second piece unit during said required piece move;
- each said set of required piece moves includes at least three moves wherein at least two of said at least three moves must be completed in a predetermined order relative to at least one other piece move for transformation of said puzzle pieces from said solved configuration to said unsolved configuration;
- each of said set of required piece moves further including moves wherein opposing faces of adjacent puzzle pieces are sidably disposed in substantially adjacent parallel face-to-face relation, and wherein all of said opposing faces that are slidably disposed in face-to-face relation are substantially planar;
- said set of required piece moves including movement of puzzle pieces in parallel relation to at least three planes, each of said at least three planes being angled with respect to each other plane by amounts greater than 0 degrees and less than 180 degrees;
- wherein each of said at least one set of required piece moves includes a first move wherein said first and second puzzle pieces move relative to one another such that opposing faces of said first and second puzzle pieces are in sliding flush contact with said stud received within said channel, and a second move wherein said stud is received within said channel for at least a portion of said second move, wherein said stud travels along a first agonic path within said channel during said first move and said stud travels along a second agonic path within said channel during said second move, said first and second agonic paths intersecting at an angle greater than 0 degrees and less than 180 degrees, said channel located on said opposing face of said first piece, said stud located on said opposing face of said second piece;
- said stud being received within said channel during at least a portion of one of said piece moves included in said set of required piece moves thereby limiting relative movement between said first and second puzzle pieces.