The exact Sudoku URLs mentioned in the article, just checked/updated: Ravi's article: http://ravimohan.blogspot.com/2007/04/learning-from-sudoku-solvers.html h

The exact Sudoku URLs mentioned in the article, just checked/updated: Ravi's article: http://ravimohan.blogspot.com/2007/04/learning-from-sudoku-solvers.html http://ravimohan.blogspot.com/2007/04/learning-from-sudoku-s... Peter Norvig's solver: http://norvig.com/sudoku.html http://norvig.com/sudoku.html Ron Jeffries' attempts: http://xprogramming.com/articles/sudokumusings/ http://xprogramming.com/articles/sudokumusings/ http://xprogramming.com/articles/oksudoku/ http://xprogramming.com/articles/oksudoku/ http://xprogramming.com/articles/sudoku2 http://xprogramming.com/articles/sudoku2 http://xprogramming.com/articles/sudoku4 http://xprogramming.com/articles/sudoku4 http://xprogramming.com/articles/sudoku5 http://xprogramming.com/articles/sudoku5 And, as dessert (Ron is very frank about his failures): http://xprogramming.com/articles/roroncemore/ http://xprogramming.com/articles/roroncemore/ "This is surely the most ignominious debacle of a project listed on my site, even though others have also not shipped. (Sudoku did not ship and will not. Shotgun will go forward if the Customer wants to.)"