Go (game)
Two players, "Black" and "White", take turns placing a "stone" (game piece) of their own color on a vacant "point" (intersection) of the grid on a Go board. Black plays first. If there is a large difference in skill between the players, the weaker player typically uses Black and is allowed to place two or more stones on the board to compensate for the difference (see Go handicaps). The official grid comprises 19×19 lines, though the rules can be applied to any grid size. 13×13 and 9×9 boards are popular choices to teach beginners, or for playing quick games. Once placed, a stone may not be moved to a different point.
Icehouse pieces
The pieces are four-sided pyramids that can nest and stack with pipping from 1 to 3 at the base. A group of three pyramids, one of each size, is called a "trio." Each "stash" or set of Icehouse pieces consists of five trios, or fifteen pyramids (variously called pieces, pyramids, or minions) of the same color and five of each three sizes: five large 3-point pyramids (called "queens" in some games), five medium 2-point pyramids (sometimes called "drones"), and five small 1-point pyramids (or "pawns"). The stacked and nested feature is not used in the original Icehouse game, but is taken advantage of in some of the other Icehouse-based games listed below.