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.
Go-Stop
A deck of Korean "hwatu" cards usually includes bonus cards. Typically there are two or three players, although there is a variation where four players can play. The objective of this game is to score a minimum predetermined number of points, usually three or seven, and then call a "Go" or a "Stop", where the name of the game derives. When a "Go" is called, the game continues, and the number of points or amount of money is first increased, and then doubled, tripled, quadrupled and so on. A player calling "Go" risks another player scoring the minimum and winning all the points themselves. If a "Stop" is called, the game ends and the caller collects their winnings.