| 摘要 |
PROBLEM TO BE SOLVED: To provide a pinball game machine for exploiting the features of a first-kind game and a second-kind game sufficiently.SOLUTION: By the ball entry into a first start port for always ball entry is opened for a short time period by the ball entry into the first start port for always ball acceptance, a first big winning port having a specific area is opened for a short time, and a success game for opening a second big winning port is performed by the success of the propriety decision of the special pattern, which is caused by the ball entry into a second big winning port to be opened only at the winning time of the normal pattern. After the success game, the winning of the normal pattern is made a high probability, and can be transferred to the state, in which the opening of the second start port is elongated to continue the open extended state till the propriety decision reaches a predetermined number, and the winning probability of the special pattern is made identical between the normal game and the opening extension state. In the ordinary game, the winning probability of the normal pattern is made lower than the winning probability of the special pattern. In the opening extension state, on the other hand, the winning probability of the normal pattern is raised, and the predetermined number is set at the numerical value which is larger the denominator of the value which is expressed by a fraction of the value, at which the winning probability of the special pattern is larger than the denominator of the value indicated in fraction of 1 or more.SELECTED DRAWING: Figure 7 |
