Sudoku - Hard

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

200 Sudoku Puzzle HARD Vol. 5 Graphic by Unique studio · Creative Fabrica

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

Butterfly Sudoku - Hard

Sudoku 6x6 - Hard

Killer Sudoku - Hard

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

Miracle Sudoku, Viral Sudoku Video

Sudoku 6,130 hard, Life and style

HELP] Stuck on Hard sudoku : r/sudoku

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

ULTIMATE CHALLENGE SUDOKU PUZZLE BOOK, There is a ton of puzzles to enjoy in this large compilation of expert Sudoku problems, which makes it ideal

Sudoku Expert: 200 extremely hard sudoku puzzles for an expert (Paperback)

Large Print Sudoku Puzzles Red Book #5 (Hard) : Hard Sudoku Puzzle Book including Instructions and Answer Keys (Paperback)

Hard Sudoku Puzzles Book: 16x16 Sudoku Games for Clever and Smart Adults, Ultimate Brain Challenging Games (Adults Puzzles Games) - Glover, James D: 9781688119505 - AbeBooks