A game apparatus includes a first total number of playing-pieces and an article of manufacture including: a grid structure which is sufficiently flexible so as to be substantially conformable to a surface of a substrate on which the grid structure is disposable; apertures in the grid structure exposing corresponding portions of the surface of the substrate on which the grid structure is disposable; areas of the apertures being sized to accommodate corresponding playing-pieces of a game; and a second total number of the apertures being sufficient to accommodate the first total number of the playing-pieces.