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Mutant Claiming

  Like Mutant Pointing, Mutant Claiming only applies to sudoku puzzles of irregular box shape, as in the above example. If the only instances of a candidate within a row or column all share a unit with a candidate in a different row or column, you can eliminate that candidate that is outside of the row or column. Consider the example above. In the column D the only two 5's do not share a box, but both share a unit with the 5 in cell C2. Thus that 5 can be eliminated.

  Because this technique is odd in nature and somewhat difficult to spot, Sudoku Snake gives it a skill value of 30.

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