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.
Dots (game)
Dots (, , ) is an abstract strategy game, played by two or more people on a sheet of squared paper. The game is superficially similar to Go, except that pieces are not taken, and the primary target of dots is capturing enemy dots by surrounding them with a continuous line of one's own dots. Once surrounded, dots are not playable.