The Ring Of Logic: Kyklos
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The Most Popular Sudoku Series Ever Returns!
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Only 7 People Have Solved This Sudoku!
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A "Phenomenal" Sudoku
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The Worst Puzzle I've Ever Been Sent
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The First Hardest Sudoku!
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Can YOU Spot My MISTAKE? Average Variant Sudoku
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The Puzzle We DIDN'T Want To Solve... (We Were Wrong.)
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