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The diagonal constraint adds a new layer of complexity that keeps even expert solvers engaged.
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Improve your logical thinking and pattern recognition with this enhanced puzzle format.
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Paradoxically, the extra constraint can sometimes make puzzles easier to solve!
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a History of the Sudoku Puzzle
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a Tips for Improving Your Sudoku Speed
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a History of the Sudoku Puzzle
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a The Benefits of Playing Sudoku Daily
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a Different Types of Sudoku Variants
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a What is Sudoku and How to Play?
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a Common Sudoku Mistakes and How to Avoid Them
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