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 Puzzle Book: 500 Hard Puzzles overlapping into 100 Samurai Style: 9781540836496: Dalipi, Arbëresh: Books

Samurai Sudoku Puzzle Book: 500 Hard Puzzles overlapping into 100 Samurai Style

Sudoku 5,707 hard, Life and style

Sudoku - Hard A3 Printable Puzzle

Hard Sudoku: Huge 300 hard SUDOKU puzzle books - sudoku hard to extreme difficulty Maths Book to Challenge Your Brain for Adult and (Large Print / Paperback)

Looking for a mentally stimulating activity that's perfect for seniors? Our Hard Sudoku for Seniors Level 1 (9x9) is the perfect way to challenge your

Challenge Your Mind with Hard Sudoku for Seniors: Level 1 (9x9) with Solutions

Sudoku - Hard

Sudoku #585 and #586 (Hard) - Free Printable Puzzles

Extremely Difficult Sudoku Puzzles Book: Very Hard Sudoku for Advanced Players who Love a Challenging Game (Paperback)

Miracle Sudoku, Viral Sudoku Video

Live Sudoku - Hard Sudoku #1095774 Sudoku, Sudoku puzzles, Brainy games

Hard Sudoku Puzzles – Free Printable