| 摘要 |
PROBLEM TO BE SOLVED: To increase display patterns of special symbols while preventing a data volume from augmenting. SOLUTION: A category information acquisition part 403 acquires information about categories of prize-winning. A memory part 404 memorizes predetermined number of special symbols' display patterns as display pattern groups per prize-winning category and the display patterns in the display pattern group in order. A category identification part 405 identifies one display pattern group from the display pattern groups memorized in the memory part 404 based on the information about the prize-winning categories acquired by the category information acquisition part 403. A random number acquisition part 406 acquires the random number corresponding to the predetermined number of the display patterns comprising the display pattern groups. The display pattern selection part 407 selects one display pattern by using the random number acquired by the random number acquisition part 406 from the category of the display pattern group identified by the category identification part 405. COPYRIGHT: (C)2011,JPO&INPIT
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