rules Modern Sudoku was popularized by Nikoli in Japan in the 1980s. It has since become a global phenomenon, with daily puzzles appearing in newspapers and onl
The diagonal constraint adds a new layer of complexity that keeps even expert solvers engaged.
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Paradoxically, the extra constraint can sometimes make puzzles easier to solve!
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rules Sudoku Strategies: Scanning and Marking
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rules What is Sudoku and How to Play?
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rules Tips for Improving Your Sudoku Speed
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rules Sudoku Strategies: Scanning and Marking
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rules Common Sudoku Mistakes and How to Avoid Them
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rules Sudoku Strategies: Scanning and Marking
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