Moral chess is a board game. Also known as "the companion piece of Weiqi", it is an intellectual game in China traditional culture. The board of moral chess is the same as Weiqi, but the rules are different from Weiqi. The rules of moral chess are relatively simple. Two people take turns playing chess, and only one piece can be played at a time. Chess pieces can't fall on the intersection of existing pieces, nor can they be connected in a straight line with existing pieces. The goal of the game is to occupy more intersections on the board and finally win.