| 摘要 |
PROBLEM TO BE SOLVED: To provide a slot machine which enables the effective use of a game by inserting one medal and the changes in the contents of the game depending on the number of inserted medals by providing the slot machine with a service game by inserting one medal and attracts game player's interest by giving the service game the same number of effective lines for a prize winning as that of a game by inserting the maximum number of medals and the most advantageous probability for the lottery. SOLUTION: A special game is equipped with the service game which enables a game player to play an advantageous game by inserting one medal under prescribed conditions. The service game is set to have the number of the effective lines for the prize winning and the probability for the lottery in case of inserting one medal identical to the number of the effective lines for the prize winning and the most advantageous probability for the lottery in case of inserting the maximum number of medals in a normal game. COPYRIGHT: (C)2004,JPO
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