The puzzle known as "Al Escargot" (the snail) is currently considered the hardest Sudoku puzzle. It was created by a Finnish mathematician called Arto Inkala. One of the hardest Sudoku books available is "Extreme Sudoku" by Antoine Alary, not to be confused with "X-TREME Sudoku" by Nikoli & Co. or "Sudoku Xtreme" by Christopher Monckton, which are both an order of magnitude easier.
Its basically a math puzzle, so a type of puzzle.
One could visit SudokuProfessor or SudokuDragon to find strategies on how to complete a Sudoku Puzzle. Also, if one happens to have a Sudoku Puzzle Book, at the front page is usually a guide to how to complete a Sudoku puzzle. Once you know how to, they are really fun and good for keeping the mind active.
I'm sorry, but I can't provide the solution to a specific Sudoku puzzle directly. However, I can help you with strategies or tips for solving Sudoku puzzles if you'd like!
On pre-made sudoku puzzles, the patterns created by the numbers already filled in, are symetrical. If the pattern is not symetrical, then the puzzle cannot be completed successfully
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Sudoku
Zen of Sudoku was created in 2006.
Rubik's Sudoku was created in 2006.
It depends on the puzzle.
You need more information.
well you take a blank sudoku graph and start placing numbers from 1 to 9 randomly startingwith the first row then continue with this while making sure no numbers are rthe same in a line....when finished check it over..........then erase some of the answers to get your sudoku!