Go is also known as Igo, Weiqi and Baduk. Since the game wasn't named onscreen, Memory Alpha uses the most common name in North America.
Go is played by two players, one placing black stones and the other placing white stones upon a wooden board with a 19x19 grid drawn upon it. The object of the game is to surround territory on the board. If a stone or a group of stones is surrounded on all sides the stones are captured and removed from the board. The player with the most surrounded territory minus the amount of captured stones at the end of the game wins.