| 摘要 |
PROBLEM TO BE SOLVED: To derive a decoration symbol combination in a novel form.SOLUTION: An integrated control CPU displays pre-change display bodies OB1 and OB2 that do not notify of a determination result of a special symbol winning determination on a display surface 17a of a symbol display device before decoration symbols are stationarily displayed, then displays a switching trigger performance K, and, triggered by the display of the switching trigger performance K, executes a symbol derivation performance that is set to display at least one decoration symbol out of the determined decoration symbols on the display surface 17a, by replacing the pre-change display bodies OB1 and OB2 thereby. At that time, the integrated control CPU sets a plurality of types of combinations of the pre-change display bodies OB1 and OB2 and the switching trigger performance K to be displayed on performance display means 17 in the symbol derivation performance, determines one combination out of the plurality of types of combinations of the pre-change display bodies OB1 and OB2 and the switching trigger performance K, and executes the symbol derivation performance. |
