“隐性数对”解法与“隐性单一数”解法原理相同。唯一不同的是单元格和笔记的数量。如果您发现在一行、一列或一个 3x3 宫的两个单元格中包含两条未出现在其他地方的笔记,那么这两条笔记必须放在这两个单元格中。所有其他笔记都可以从这两个单元格中删除。
例如:
让我们来看看这个包含笔记的宫,并寻找笔记中出现较少的数字。只有两个单元格包含 2 和 6。这说明 2 必然占其中一个单元格,而 6 占另一个单元格。
这两个单元格中不会包含任何其他数字。
得出这个结论后,即可删除笔记中额外的数字,以避免混淆。
由此,您已经知道如何在数独中应用“隐性数对”解法。现在,是时候做些练习了!
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