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Killer sudoku

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  1. The following tables list the possible combinations for various sums

    Source: Wikipedia Unhappy with this fact? more info
    created by user picturefactobot on March 16, 2009
  2. a puzzle that combines elements of sudoku and kakuro

    Source: Wikipedia Unhappy with this fact? more info
    created by user picturefactobot on March 16, 2009
  3. Despite the name, the simpler killer sudokus can be easier to solve than regular sudokus, depending on the solver's skill at mental arithmetic

    Source: Wikipedia Unhappy with this fact? more info
    created by user picturefactobot on March 16, 2009
  4. also killer su doku, sumdoku, sum doku, addoku, or samunamupure

    Source: Wikipedia Unhappy with this fact? more info
    created by user picturefactobot on March 16, 2009
  5. the hardest ones, however, can take hours to crack

    Source: Wikipedia Unhappy with this fact? more info
    created by user picturefactobot on March 16, 2009
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