| 摘要 |
PROBLEM TO BE SOLVED: To provide a game machine which prevents a game from becoming monotonous. SOLUTION: According to the game machine when an SB winning probability is won as a result of a winning combination lottery in a regular mode and then an SB is won, the game machine is shifted from the regular mode to an SB mode, and the player performs a game once in the SB mode. The payout ratio in the SB mode is set to <100%. Moreover in an RB introduction mode in a BB mode, the winning probability of a small bonus is the same as that in the regular mode. Further in an RB introduction mode, the SB probability is not won, and therefore the payout ratio is higher than that in the regular mode. Thus, even if the winning probability of the small bonus is set to the same value in the regular mode and the RB introduction mode, a play in the RB introduction mode is more advantageous to the player. COPYRIGHT: (C)2009,JPO&INPIT
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