| 摘要 |
PROBLEM TO BE SOLVED: To make enhancible the calculation ability while playing a game by executing multiplication or addition when the pieces of an opponent, which are aligned in a row on a board, are sandwiched through the use of the two pieces of stones of our side, inverting the piece row of the opponent by means of the calculation result and progressing the game. SOLUTION: Orthogonally crossing lines are plotted at equal interval on a square or rectangular board, and also boundary lines for distinguishing the squares (outer peripheral part) positioned on each side and an inner part (internal board) are plotted by emphasis. Then, unit pieces (a) with each front and rear face in different color, black on a face, white on the other face and having on point value, multiplication stone pieces (c) and addition stone pieces with a numeral and stone pieces having a function for an arithmetic method or the like are prepared. When the pieces of the opponent, which are aligned in a row, are sandwiched by the two pieces of the stones of our side, and the sum or product of the points in the two sandwiching pieces or the arithmetic result is larger than the total of the points of the sandwiched piece row of the opponent, the row is inverted to make the game processed. Besides, in another case, one or a plurality of opponent pieces corresponding to the arithmetic result are inverted.
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