| 摘要 |
<p>A machine includes a display, a processor, and software that when executed by the processor causes: the determination that a trigger event has occurred; the selection of a precursor symbol set 500 from a precursor symbol group, and for the or each symbol in the selected precursor symbol set 500, the random determination of a corresponding arrangement position; the display of each symbol of the selected precursor symbol set 500 in the corresponding arrangement position; the selection of a supplementary symbol set 600 from a supplementary symbol group; for the or each symbol in the selected supplementary symbol set 600, the determination of a corresponding arrangement position; and after the display of the selected precursor symbol set 500, the display of the selected precursor symbol set 500 and the supplementary symbol set 600 by displaying the or each symbol in the selected supplementary symbol set 600 in the corresponding arrangement position for that symbol. The precursor symbol set may comprise wild symbols with the symbols of the supplementary symbol set being regular symbols. The trigger event may be a randomly occurring event, such as the selection of a trigger symbol. The invention seeks to increase player interest in a game.</p> |
