To provide a board game which is apparently simple and easy to play but is deep by solving the problem that conventional Japanese chess, and game of go are complicated in rules and mahjong is difficult to count points, which are not suitable as simple amusement.

The board game is the game to compete for the total points of a piece and a square by assigning numbers, marks, or the like to the nine squares (three-by-three) with different points, allowing a defense side to select one square among the nine, and allowing an offense side to arrange by prediction the pieces with different points on the vertically or horizontally adjacent three squares, so as to guess the one square. The movement of the pieces is restricted in continuous prediction, thereby to allow the offense side to predict the squares by considering the subsequent arrangement.