A semiperfect magic cube, also called an Andrews Cube, is a Magic Cube for which the cross-section diagonals do not sum to the Magic Constant.

**References**

Gardner, M. ``Magic Squares and Cubes.'' Ch. 17 in *Time Travel and Other Mathematical Bewilderments.*
New York: W. H. Freeman, pp. 213-225, 1988.

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1999-05-26