| 摘要 |
PROBLEM TO BE SOLVED: To increase expectations for a game state which is advantageous to a player.SOLUTION: When control is executed to a big winning game state corresponding to a special symbol game using a first special symbol, a big winning kind is determined to be "first big winning" or "second big winning" by a prescribed ratio. When control is executed to the big winning game state corresponding to a special symbol game using a second special symbol, the big winning kind is determined to be "second big winning". When the big winning kind is determined to be "first big winning", since a round upper limit determination value becomes smaller than the specific number of times or the like, it becomes impossible or difficult for a game ball to pass through (advance into) a lower big winning port, and it becomes impossible or difficult to establish a probability variation control condition. The special symbol game using the second special symbol is given priority over the special symbol game using the first special symbol. In a probability variable state, high base control for making it easy for a game ball to pass through (advance into) a second start winning port is executed. |
