| 摘要 |
PROBLEM TO BE SOLVED: To provide an unfair alteration prevention device capable of unfair alteration causing illegal playing by operating a back control board while a normal control board is kept in an operated state and notifying a pachinko machine subjected to unfair alteration to a pachinko parlor and a player. SOLUTION: An unfair alteration prevention device is provided with a management device 2 and a plurality of game controllers 5 disposed for respective game machines 1 to be connected to the management device 2 for communication by a synchronous communication means 3, and displaying means 6 are connected to the game controllers 5 for notifying the unfair alteration of the game machines. The management device transmits a simultaneous lighting command to the plurality of game controllers 5. In the case of a usual game state, each game controller 5 lights the displaying means 6 by the lighting timing of a usual time after receiving the simultaneous lighting command and, in the case of a special game state, the controller 5 lights the displaying means 6 before the lighting timing of the usual time.
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