Is this "3-Dimension Tic-Tac-Toe"? For example,marc "*" makes three marcs below: |*AA|DE.|D.E| |CB.|HI.|...| |C.B|...|H.I| +---+---+---+ |FJ.|LN.|...| |GK.|OM.|...| |...|...|...| +---+---+---+ |F.J|...|L.N| |...|...|...| |G.K|...|O.M|