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What Is Ambiguity Rule In Sudoku? [Solved]
During this process the designer must be careful not to remove two numbers that would cause an ambiguity (where those two numbers could be swapped and the puzzle could be completed two different ways, therefore having two solutions). This is what is called the sudoku ambiguity rule.
Sudoku Primer 139 - TidBits - Unique Rectangles or Ambiguity Rule
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Sudoku Primer 80 - ambiguity rule in a hard puzzle - Sudoku To Go vol 104 (sudoku tips and tricks)
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Sudoku Primer 114 - ambiguity rule (Unique Rectangle) examples
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