Another problem of minimality also remains unsolved—to wit, what is the smallest number of digits a puzzle maker can place in a starting grid and still guarantee a unique solution?
另外还有
类「极小」
问题也还没有
决：在保证有唯条件下，个初盘
少需要几个数字？
Another problem of minimality also remains unsolved—to wit, what is the smallest number of digits a puzzle maker can place in a starting grid and still guarantee a unique solution?
另外还有类「极小」问题也还没有决：在保证有唯条件下，个初盘少需要几个数字？
：
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