| 摘要 |
A slot machine of the present invention includes a display having a screen capable of displaying a symbol arrangement image in which a plurality of symbols are arranged and a valid area image having a shape capable of including one or more symbols, and a controller in communication with the display displaying to the screen the symbol arrangement image and the valid area image so as to superpose the valid area image on the symbol arrangement image in such a manner that said valid area image moves and then stops, and providing an award according to a symbol included in the stopped valid area image.
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