The present invention piece during the game is I provide Othello game (registered trademark) set that can prevent overflowing in the squares adjacent from a given square. The apparatus includes a game board 1, each column and row it has been partitioned in alignment vertically and horizontally with a grid 10 for each 8-th frame mounting, are color-coded the one and the other surface 20a and 20b in black and white , a similar piece 2 and the number of at least the squares are formed in the shape of a disc, piece to prevent overflowing into adjacent the grid from a predetermined grid of partition lines 11 piece is placed anti-extrusion means I and a 3. It said prevention means is composed of protrusions 30 formed along the partition line of the square. .BACKGROUND
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