| 摘要 |
PROBLEM TO BE SOLVED: To enable the fluctuation of the special game condition generating probability of the following time by setting a value to be given to a player by a usual electric generator in a first game condition higher than that of a second game condition. SOLUTION: Opening time of an electric winning device 9 is set long and short each other, and winning ratio of a hit ball to the electric winning device 9 is changed so as to change the right generated condition generating probability. Namely, in the case where the opening time of the electric winning device 9 is short, a second game condition having a low generating probability of the special game condition that the winning ball is generated during the opening is selected, and in the case where the opening time of the electric winning device 9 is long, a first game condition having a high generating probability of the special game condition that the winning ball is generated during the opening is selected. With this structure, special game condition generating probability of the following time can be fluctuated by the discriminating information such as a pattern. |
