sil...@math25.mathematik.uni-bielefeld.de (Torsten Sillke) writes:
>On the 2*2*2 grid you can take 5 points, such that no 4 points lay on a
>plane. The only possibility (up to symmetry) is:
>        o .      . o
>        o o      o .
>Can you find the only possibility to take 8 points in the 3*3*3 grid
>with the same property?