| 摘要 |
PROBLEM TO BE SOLVED: To improve lottery timing for performing a large prize probability increasing lottery in a new lottery form. SOLUTION: By generation of a large prize serving as a trigger, a main control part 200 actuates a probability fluctuation deciding random number counter 1570 circularly carrying out counting operation from an initial value to a final value. Then, a counter value of the probability fluctuation deciding random number counter 1570 is extracted at predetermined timing, and according to the extracted counter value and a previously decided winning value, the lottery for deciding whether large prize generation probability is increased or not is carried out. In this way, the lottery increasing large prize generation probability can be carried out in the new lottery form. |
