摘要 |
PROBLEM TO BE SOLVED: To lessen the work load of processing of a main control board and increase the flexibility of processing of a design control board. SOLUTION: Ordinary variation of 10 kinds are variation patterns for which time of 10 kinds ranging from 5 seconds to 10 seconds is set for time from the start of variation of left, middle and right special designs until the stop of variation (hereinafter referred to also merely as variation time). Shortened variations of eight kinds are variation patterns for which variation time of eight kinds is se from four patterns including one, two, three, and four retained memories of special designs, and two probability differences. Ordinary ready- to-win states of four kinds are variation patterns for which time of four kinds ranging from eight to 15 seconds are set. The ready-to-win state does not always end in a jackpot but represents, as a prerequisite for a jackpot, a state in which after special designs start varying, left and middle special designs prove to be the same and the right special design is under variation and not determined yet. |