| 摘要 |
PROBLEM TO BE SOLVED: To enhance a player's hope of winning a jackpot by accumulating pieces of information about the action of movable members based on the storage of start signals into memory, and enabling the movable members to move at a time during an optional game. SOLUTION: If no optional game is yet played upon the entrance of balls into starting holes 15 to 17 and a plurality of winning events for start are stored into memory, then the total number of movements of the movable members 12a and 12b, for which the numbers of winning events are stored in memory, is stored into memory; if the optional game is to be played based on the storage of winning events into memory, the movable members 12a and 12b are brought into continuous opening and closing movements by the total number during the next one optional game.
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