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  • mike - May 11 2008 | sudoku, math, puzzles, programming

    Interesting article on rating the difficulty of Sudoku's and various solving methods (including a short backtracking program written in Ruby).

  • Emiko - May 13 2008 | puzzle
    • mike - May 15 2008

      I didn't know you were a math nerd, Amy!

    • Emiko - May 15 2008

      I don't understand difficult math, but my husband and I are enjoying solving Sudoku every night by competing how fast we can solbe it !

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