Net Y is an acronym for Nested Tetrahedrons Y. There are three superimposed, interdependent instances of Y which are played simultaneously. Two of the grids are imprinted on tetrahedral shapes, and one is imprinted on a simple triangle. The winner of the majority of the three wins overall. Net Y rule sheet: http://www.marksteeregames.com/Net_Y_rules.pdf Net Y printable game board: http://www.marksteeregames.com/Net_Y_board.pdf