Sudoku hard: September 16, 2023

Web Sudoku

Sudoku - New York Times Number Puzzles - The New York Times

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Free Printable Hard Sudoku with the Answer #14739

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Sudoku Large Print for Adults - Hard Level - N°31: 100 Hard Sudoku Puzzles - Puzzle Big Size (8.3x8.3) and Large Print (36 points) (Large Print / Paperback)

Hard Sudoku Puzzle Book for Adults: 200 Large Print Puzzles with Answers (Large Print / Paperback)

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Hard to Extreme Sudoku - 300 Challenging Puzzles - Volume 2: Super Fiendish Sudoku Puzzle Book for Advanced Players (Paperback)

Samurai Sudoku