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In which I solve an EXTREME SUDOKU for Twitter
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X-Wings and the Rectangle Rule for Solving Medium to Hard Sudoku Puzzles
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Y-wing (XY Wing) - an Advanced Sudoku technique
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How Experts Make New Sudokus
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How To Do Hard Sudokus In 10 Minutes
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Sudoku Conquest - New Multi-Language Support
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Sudoku Multi 2
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MultiSudoku for iPhone with Multi-Grid Sudoku Puzzles -- AppFinders
