UGGU is the acronym for "ungleich-gleich/gleich-ungleich" (different-equal/equal-different) Material: A square of wood with a 9x9 grid. Alternatively, for a shorter playing time or else to learn the game, the 7x7 bright-colored area can be used 14 light-colored wooden pieces in three different heights, for a total of 42 cube units 14 dark-colored wooden pieces in three different heights, for a total of 42 cube units Rules: Bright starts and sets any of its pieces on a square of the playing field except for those on all four board sides Then dark sets any of its pieces on any square not adjacent to the bright piece and also not on the board edges Both players now place their pieces alternatively so that every new piece is placed adjacent (orthogonally, not diagonally) to an already placed piece, no matter the color. The following two rules must be observed: a) If the adjacent pieces have different heights, they must have the same color b) If the adjacent pieces have the same height, they must have different colors The player unable to add a new piece during his turn loses the game