| 摘要 |
PROBLEM TO BE SOLVED: To prevent monotonization of tastes of a game by varying degrees of expectation to be given to a player in each time without fixing the degrees of expectation as one. SOLUTION: Even when big winning with the different number of rounds is selected, the same behavior is generated in appearance by setting opening/closing patterns of a big winning port as the same. Thus, it becomes difficult to discriminate how many rounds of the big winning is obtained from opening/closing frequencies of the big winning port. Thus, when probability variation ratio of two rounds is different from that of five rounds, the degree of expectation of probability variation is normally determined as one by the number of rounds, however, during a period that the number of rounds can not be discriminated, both degrees of expectation of probability variation can be mixed. COPYRIGHT: (C)2010,JPO&INPIT
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