| 摘要 |
PROBLEM TO BE SOLVED: To provide a mahjong ball game machine which makes it possible to advance a tile in hand without using a special ball entrance during a game in which the right of a BB game (second special game) is acquired and makes the opening of the special ball entrance and a ball entry to the special ball entrance possible by one game ball during a game in which the right of a CB game (first special game) is acquired. SOLUTION: The control means of the mahjong ball game machine executes control so as to validate a first opening operation port and a second opening operation port during the game in which the right of the first special game is imparted and to validate the first opening operation port without validating the second opening operation port during the game in which the right of the second special game is imparted. COPYRIGHT: (C)2009,JPO&INPIT
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