The diagonal constraint adds a new layer of complexity that keeps even expert solvers engaged.
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Brain Training
Improve your logical thinking and pattern recognition with this enhanced puzzle format.
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Faster Solutions
Paradoxically, the extra constraint can sometimes make puzzles easier to solve!
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Competition Ready
X-Sudoku appears in world championships. Practice here to compete globally.
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Play Anywhere
Our responsive design works perfectly on desktop, tablet, and mobile devices.
sudoku printable hard
rules Sudoku competitions are held globally, where speed solvers compete to finish complex grids in the shortest time possible.
rules History of the Sudoku Puzzle
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rules Different Types of Sudoku Variants
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rules Common Sudoku Mistakes and How to Avoid Them
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rules History of the Sudoku Puzzle
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rules Tips for Improving Your Sudoku Speed
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rules Different Types of Sudoku Variants
rules Sudoku competitions are held globally, where speed solvers compete to finish complex grids in the shortest time possible. jigsaw sudoku free printable To solve a Sudoku puzzle, one must look for cells where only one number is possible, or rows/columns/blocks where a specific number has only one possible placement.