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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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X-Sudoku appears in world championships. Practice here to compete globally.
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daily Many people enjoy solving Sudoku as a relaxing hobby. It provides a sense of accomplishment when a difficult puzzle is finally completed correctly. killer sudoku medium 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 online platforms worldwide.
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