| 摘要 |
PROBLEM TO BE SOLVED: To improve the expectation of a player on an AT mode. SOLUTION: In an AT mode lottery part 51, it is determined by drawing lots whether or not the right of transition to the AT mode is to be applied. When it is determined in the AT mode lottery part 51 that the right of transition to the AT mode is to be applied, concerning whether or not the next game is to transit to the AT mode, an AT mode transition lottery part 56 draws lots by using a low transition probability table 57 or a high transition probability table 58. In the game of an ordinary mode, the AT mode transition lottery part 56 draws lots by using the low transition probability table 57. When it is determined that the right of a plurality of times of transition to the AT mode is to be applied, in the final game by the AT mode, the AT mode transition lottery part 56 draws lots by using the high transition probability table 58. Since the probability of success in the high transition probability table 58 is higher than that of the low transition probability table 57, the start of the AT mode can be easily continued from the end of the previous AT mode.
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