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!
Sudoku has its origins in a puzzle called "Number Place," created by American architect Howard Garns in 1979. The puzzle gained popularity in Japan in the 1980s, where it was renamed "sudoku," meaning "single number." The game was later popularized worldwide in the early 2000s, particularly through publications and online platforms.
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
Sudoku
8
Rubik's Sudoku was created in 2006.
Zen of Sudoku was created in 2006.
You need more information.
It depends on the puzzle.