| 摘要 |
PROBLEM TO BE SOLVED: To improve services rendered to customers and the ability of attracting customers by improving the recreational characteristic of a bowling game. SOLUTION: A game is progressed depending on the clearing of some specified pin arrangement patterns, and premium is provided to a player in accordance with the number of cleared pin arrangement patterns and the grades of the difficulty level of the pin arrangement patterns. Also, by the selective operation of a bowler, a pin arrangement pattern is set.
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