| 摘要 |
<P>PROBLEM TO BE SOLVED: To execute control so as not to provide an extremely-skilled person with excessive profit opportunities while improving a technical intervention property. <P>SOLUTION: When a game ball enters a first start port 62, small winning is attained at a prescribed probability, a specific ball entry device 93 is opened when the small winning is attained, a "small-winning development jackpot" is attained when the game ball which has entered the specific ball entry device 93 falls into a specific area 96, a jackpot port 91 is opened and a development special game is executed. When the small winning is generated, shift drawing for determining a time shortening shift propriety after the development special game is executed. The result of the shift drawing is indicated at the timing of indicating the small winning to a player. A valid period is set as a time which is shorter than a time assumed on design as a time required from the hitting of a game ball until reaching the specific area. <P>COPYRIGHT: (C)2013,JPO&INPIT |
