This is a practice for you. The computer makes the first move. -2 Players- Your opponent is another person. The black player makes the first move. -Network- Game Center matches the two players and computer decides the colors. You can play with all players of the world. (Please join Game Center at first.) -Leaderboards- Game Center saves the result of the games including the wins, draws and defeats of the players, and provides the Leaderboards. -Achievements- Game Center saves the players’ “Points” and provides the achievements. -Audio Switch- Turn on/off audio. * The Undo function only for the Computer mode and the 2 Player mode. * The point formula for Achievements: 1 win=3 score, 1 draw=1 score, 1 defeat=-1 score, ten scores=1 point, points=(wins x 3 + draws - defeats) / 10 * The player who exits game before game over loses the game at the network mode. * The more explanations please refer to the Readme of the app or APP Support.