| 摘要 |
PROBLEM TO BE SOLVED: To provide a game machine capable of effectively preventing a game parlor from suffering an unreasonable loss due to frauds. SOLUTION: A Pachinko game machine is provided with: a putout device 140 for putting out prize balls; a putout control means 170 controlling the putout device 140 to put out a prescribed number of prized balls when a prescribed winning condition is established; a shooting device 130 for shooting game balls according to a shooting operation by a player; switches 41 and 42 for detecting the game balls shot by the shooting device 130 and used for the game; a shot ball counter for counting the number of game balls detected by the switches 41 and 42; and a prize ball counter for counting the number of game balls that the player obtains as the prize balls according to the establishment of the winning condition; and specifies an output ball rate based on the counting results of the shot ball counter and the prize ball counter and determines whether the putout ball rate is an abnormal value or nor based on a predetermined output ball rate abnormality determination value. COPYRIGHT: (C)2009,JPO&INPIT
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