PROBLEM TO BE SOLVED: To select a game machine according to data calculated based on game results and to estimate expectation whether a next big win comes or not during a game or after finishing a last big win.;SOLUTION: A management computer 30 calculates private probability for every player (for a member) based on the frequency of starts and the frequency of special prizes collected from each game machine 10. When a game data transmission request is transmitted from a data release machine 40 to the management computer 30, game data including the private probability are transmitted from the management computer 30 to the data release machine 40 and displayed thereon. The data release machine 40 can display a maker announcement probability of the game machine 10 along with the private probability.;COPYRIGHT: (C)2005,JPO&NCIPI
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