| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a Pachinko machine with which a player can keep holding expectation until near the final round without losing expectation of winning prize balls and probability variation in a round shortly after winning a jackpot. <P>SOLUTION: In a Pachinko machine which draws lots for getting a jackpot at prescribed probability by a prize winning ball getting into a starting prize winning port and opens a jackpot prize winning port when the lottery comes to a jackpot and the jackpot probability is raised in the next lottery when a prescribed condition is satisfied, a probability varying counter 22g and a probability variation determining table 22h are provided, the probability variation determining table 22h defining a norm clear condition comprising limit time to move the probability varying counter 22g by +1 and the number of a prize winning ball into the jackpot winning port for each round until the last round. In the jackpot, while opening the jackpot prize winning port at each round, a main controller 22 advances the probability varying counter 22g by +1 on every satisfaction of the norm clear condition and sets to raise the jackpot probability by a count value of the probability varying counter 22g at the finish of the last round. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
