ZERTZ is played with 5 white, 7 gray, 9 black marbles, and 37 round tiles.The tiles are to be used to assemble the board; the marbles are the pool. Each turn you must place one marble on the board and next remove a free tile: The aim is to capture 3 white, 4 gray, 5 black marbles, or 2 marbles of each color. Aged 12 and up.