| 摘要 |
PROBLEM TO BE SOLVED: To enhance technical intervention property of a pinball game machine by controlling the length of a specific game according to a player's skill. SOLUTION: The pinball game machine is capable of variably displaying two kinds of special symbols which are first special symbols and second special symbols. After the end of a special game, the specific game more advantageous to the player than usual is carried out until the total of variable display frequency of the first special symbols and the variable display frequency of the second special symbols reaches the predetermined total upper limit frequency or until the occurrence of a new special game. However, when a ball enters a second start port, the total upper limit frequency itself decreases. COPYRIGHT: (C)2011,JPO&INPIT
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