Sudoku - Hard

These hard sudoku puzzles have fewer clues than the others on the site and will require more advanced strategies to solve.

Samurai Sudoku - Hard

Sudoku 5,707 hard, Life and style

Sudoku #713 and #714 (Hard) - Free Printable Puzzles

Sudoku 6,034 hard, Life and style

Hard Sudoku Puzzles and Solution: suduko puzzle books for adults difficult - Sudoku Hard Puzzles and Solution - Sudoku Puzzle Books for Adults & Senio (Large Print / Paperback)

Hard Sudoku Puzzles and Solution: sudoku puzzle books challenging - Sudoku Hard Quiz Books for Expert - Sudoku Maths Book for Adults & Seniors - (Sudo (Large Print / Paperback)

1000+ Sudoku Puzzles Easy to Very Hard: Sudoku puzzle book for adults with solutions (Paperback)

Vote - Which one is Insane or Very Hard Level : r/sudoku

NYT Sudoku Hard Puzzle Today 9 November 2023 - News

A Hard Classic Sudoku for you to enjoy : r/sudoku

★ Sudoku puzzle book for adults * 320 Sudoku puzzles * 3 levels of difficulty (easy, medium, hard) * for beginners, advanced and experts * The Sudoku

Hard Sudoku Puzzle Book for Adults : 320 Puzzles (Puzzle Books for Adults) Volume 11 (Paperback)

Hard Sudoku Puzzles for Kids - Free Printable Worksheets

Sudoku #1359 and #1360 (Hard) - Free Printable Puzzles