| 摘要 |
PROBLEM TO BE SOLVED: To enhance interest in a game by granting performance value differing from a sense of expectation toward a probability variable jackpot for a double ready-to-win performance including many non-probability variable patterns as ready-to-win patterns.SOLUTION: As a ready-to-win performance, a single-ready-to-win performance and a double-ready-to-win performance can be executed. It is determined to execute the double-ready-to-win performance at a higher ratio when a "jackpot" is determined than when "losing" is determined. In determination of the "jackpot" or in determination of execution of a probability variation promotion performance, and in determination of execution of a double-ready-to-win performance, a double-ready-to-win pattern is determined such that the number of non-probability variation patterns becomes larger than that of probability variation patterns. |
