To provide a board game friendly to everyone through a simple rule and rich in amusement at a match.

The rule of the board game is determined so that numerical pieces 11-19 and a maximum numerical piece 20 are able to take out numerical pieces 11-19 of an opponent with a number smaller than that of one's own piece adjacent to a pattern where a piece is moved, and while an even-numbered, star piece 22 is able to take out even-numbered, numerical pieces 12-20 of the opponent adjacent to a pattern where a piece is moved, the even-numbered, star piece is taken out by the even-numbered, numerical pieces of the opponent, and while an odd-numbered, star piece 23 is able to take out odd-numbered, numerical pieces 11-19 of the opponent adjacent to a pattern where a piece is moved, the odd-numbered, star piece is taken out by the odd-numbered, numerical pieces of the opponent. As a result, a process of struggling against an opponent piece so as to prevent five opponent pieces from forming a line in series on the board provides the game rich in amusement by the reverse of the situation being apt to occur.