| 摘要 |
PROBLEM TO BE SOLVED: To provide a technique capable of surely detecting a fraudulent game. SOLUTION: The opening/closing member 22 of a variable winning device 20 is controlled to be open when a big winning game acquisition condition is achieved, and an effective period is set. Then, within the effective period, when a game ball through the opening 22a of the variable winning device 20 passes through a special area 24, a big winning game state advantageous to a player is generated. Within the effective period, a reporting device 12 is operated for a set period when it is detected that external force is applied to the game machine, and a game is interrupted when it is detected that the external force is applied to the game machine and also it is detected that the game ball passes through the special area 24. COPYRIGHT: (C)2009,JPO&INPIT
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