| 摘要 |
<P>PROBLEM TO BE SOLVED: To promote communication between users in which the present of an item serves as an element. <P>SOLUTION: About item grant accompanying an event play, priority acquisition items, the occurrence rate of which is especially higher than those of others, are established from the inside of candidate items 14a-14e peculiar to an event for each user. Further, a kind thought to be the priority acquisition item is established so as to disperse within a reference user 2a and its friend users 2b-2e. As a result, the kind of an item, which is given by playing the event, is one-sided for each user, each user is easy to acquire the two or more priority acquisition items, but is hard to obtain a non-priority acquisition item, and present between users is prompted. <P>COPYRIGHT: (C)2011,JPO&INPIT |
