| 摘要 |
PROBLEM TO BE SOLVED: To evade a failure that a ball which enters before start winning wins V and a specified game state is newly generated and the failure that the ball which enters before V winning wins V and the specified game state is continued. SOLUTION: Ball detection by a specified ball detector 48 is invalidated at the point of time at which a prescribed condition is established after the end condition of the specified game state is established, the ball detection by a start ball detector 5b is invalidated during a specified ball valid period and interval time Tk is set to a length equal to or longer than prescribed time Tj. Thus, since start winning during the specified ball valid period is invalided, the failure that the specified game state is newly generated by the ball which enters during the specified game state and the failure that the winning ball during a previous round remains and shifting to the next round is performed by the V winning of the winning ball are evaded.
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