Torsten Sillke <sil...@math25.mathematik.uni-bielefeld.de>

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?

good luck, Torsten Sillke
(as nobody mastered any of the puzzles I posted so far, I hope this is
easy enough for you.)