| 摘要 |
PROBLEM TO BE SOLVED: To provide a game machine preventing a fraudulent act.SOLUTION: A first major winning hole door is opened, setting of an effective period of a privilege winning switch is started when the number of game balls within an area in a special game state is larger than zero, and grant of a jackpot game is determined with detection of a game ball by a privilege winning switch within the effective period as an opportunity. When the number of game balls within an area reaches zero before operation time elapses, the effective period is set before the operation time elapses. When the number of game balls within an area does not reach zero before the operation time elapses, the effective period is extended before the number of game balls within an area reaches zero. |
