五子棋是一种两人对弈的纯策略型棋类游戏，通常双方分别使用黑白两色的棋子，下在棋盘直线与横线的交叉点上，先形成5子连线者获胜。-Backgammon is a two pure strategy type of chess board games, usually two sides to use black and white pieces, at the intersection of the straight line and the horizontal line of the board