| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a slot machine which prevents games from becoming monotonous. Ž<P>SOLUTION: When a player wins a BB, the upper limit number of games in an RB introduction mode is determined. When a game is shifted to a BB mode, games in the RB introduction mode are executed. The prize winning probability in the RB introduction mode becomes equal to that of a small hand in an ordinary mode. When the game number in the RB introduction mode reaches the upper limit number, the game moves to the RB mode from the RB introduction mode, The BB mode comes to an end when the number of medals gained by the player reaches the upper limit. By biasing a game number in the RB introduction mode in the BB mode, the number of medals to be gained by a player can be biased. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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