“隐性单一数”是一种非常简单的数独解法。“隐性单一数”的关键在于在整行、整列或 3x3 宫中只有一条笔记。但是,这种解法需要玩家仔细留意,因为要发现只有一条笔记的情况很难。
如果您看看这个例子,将会更容易理解这种解法。
我们注意看这个包含笔记的 3x3 宫。其中只有一个单元格可以填数字 1,那就是最右边的单元格。这个宫中没有任何其他单元格包含笔记 1。
因此,我们可以删除这个单元格中的所有笔记并填入数字 1,因为这是唯一可能的选项。
这就是“隐性单一数”解法。学会它之后,您可以继续学习下面的数独策略。
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