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摘要

PROBLEM TO BE SOLVED: To effectively enhance the amusement of a game machine having a sudden probability-variable jackpot by giving a player a sense of expectancy for the probability of a jackpot being upgraded to a ball put-out jackpot, advantageous with respect to the put-out of balls, when the sudden probability-variable jackpot is announced to the player.;SOLUTION: When the ball put-out jackpot is won, a specific pattern is selected from a range of selection including a ready-to-win jackpot presentation pattern and an upgrade presentation pattern. In the ready-to-win jackpot presentation pattern, arrangement of a combination of jackpot symbols is finalized through a ready-to-win combination with same symbols partly arranged in a prescribed mode. In the upgrade presentation pattern, arrangement of a combination of jackpot symbols is finalized through an upgrade announcing presentation in the upgrade presentation after non-ready-to-win symbols including chance symbols corresponding to the probability-variable state inviting jackpot are temporarily stopped. When the probability-variable state inviting jackpot is won, a specific pattern is selected from a range of selection including a chance symbol jackpot presentation pattern, in which chance symbols are stopped and finalized in the final stage of symbol variation and a challenge presentation pattern, in which chance symbols are finalized through a non-upgrade announcing presentation in the upgrade presentation after chance symbols are temporarily stopped.;COPYRIGHT: (C)2008,JPO&INPIT