The puzzle consists of eight contrasting painted cubes - white and black. The unrolling cubes are given in the drawing. It is possible to stick the cubes of strong paper or to take wooden cubes and to paint (or to paste over with a paper) their sides.
It is necessary to collect a cube 2x2x2 with "chess" colouring of each side using eight cubes, as shown in the drawing. Thus the following condition must be observed: it is possible to put cubes to each other only with equally painted sides.
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