| 摘要 |
<p>The spatial logic puzzle of cubical configuration is made up of 26 small cubes permanently abraded together in a 3 X 3 X 3 array, with one cube 'missing'. Seven cubes are displaceable, four in pairs, along three mutually orthogonal axes. The externally visible faces of the cubes may be provided with colour coding or other symbols. The central body of the puzzle consists of 7 cubes in a cruciform so that there are (19) cubes. The cubes are held in place by overlapping transparent plates, secured to the central outer cubes.</p> |
