Patent ID: 8250206

Claim:
A server comprising: a storage unit for storing a history of activities performed by two or more characters in a virtual world according to operations performed on a plurality of clients; a search unit for searching the storage unit to retrieve a history of activities in which a first character has changed a state of a second character or a third character, the first character having performed an activity according to an operation performed by a first client, the second character having performed an activity according to an operation performed on a second client and the third character having performed an activity according to an operation performed on a third client; a calculation unit for calculating, on the basis of the retrieved history, a first numerical score indicating the extent to which the first character has changed the state of the second character and a second numerical score indicating the extent to which the first character has changed the state of the third character; and a transmission control unit for controlling, on the basis of the calculated numerical scores, a frequency with which a state of the first character is transmitted to the second client and to the third client, the state of the first character having been changed according to an operation performed by a user on the first client.