| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a pinball game machine in which an expectation value for one holding ball of a player is not changed and disadvantage of a player can be reduced. <P>SOLUTION: The pinball game machine includes: a start storage means to store start memory according to a ball entry into a starting port set on a game board; a winning/losing lottery means to carry out winning/losing lottery on the basis of the start storage means; a special game executing means to move a game to a special game advantageous for acquisition of a prize-winning ball, when the result of the winning/losing lottery is winning; and a holding ball storage means to store prize balls which are not paid out as holding balls. In the pin ball game machine, a probability setting changing means capable of changing setting of the winning probability of the winning/losing lottery is provided. The probability setting changing means can change the setting of the prize winning probability in the intervals of games, on condition that the game is not played, the start memory of the start storage means is not stored, and the holding ball memory of the holding ball storage means is not stored. <P>COPYRIGHT: (C)2012,JPO&INPIT |
