Nonconsecutive Sudoku
This puzzle is an unusual sudoku variant. Unlike normal sudoku where around 17 givens is the minimum to create a valid puzzle, with this variant you can get a valid sudoku puzzle with the fewest number of givens compared to this with nonconsecutive sudoku. For instance, a normal 9x9 sudoku puzzle but with the non-consecutive constraint can be valid with around just nine givens, as intimidating as this may look to the puzzler observing the puzzle!
The added constraint in this variant is that adjacent cells must not contain consecutive numbers. So for instance if a cell contains '2', then its four neighbours must not contain 1,2,3. You can choose to receive puzzles where the constraint also applies to edge cells of the puzzle - where the constraint wraps around to the other edge of the puzzle, or to receive puzzles where the constraint does not wrap around.
There are various versions of non-consecutive sudoku we can supply of different shapes and sizes. Popular options are sudokus displayed in a circular fashion (circle sudoku) - this works particularly well with puzzles where the non-consecutive regions wrap around as a circular puzzle is a natural way to display this - and also to vary the number and size of the regions. 8 x 8 circular sudoku with two constraints - spokes and circles - are a popular method; due to the added constraint excellent puzzles can be generated without the box constraint of normal sudoku. If you are interested in the non-consecutive variant of sudoku, please
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