Sudoku - Hard

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

Very Hard Sudoku Puzzle : r/sudoku

Hard' sudoku made easy - with this simple method

Large Print Sudoku 12x12 - 100 Hard Puzzles: Vey Difficult Sudoku Variant - Different Style of Sudoku Puzzle Book for Adults (Large Print / Paperback)

13 Easy Ways to Solve Hard Sudoku Puzzles - The Tech Edvocate

Free Printable Hard Sudoku with the Answer #14739

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)

Train your brain with the 175 Large Print Hard Sudoku Puzzles for Adults 6x9 activity book! With 175 large print hard Sudoku puzzles at your

175 Large Print Hard Sudoku Puzzles for Adults: Only One Puzzle Per Page! (Pocket 6x9 Size) (Paperback)

Sudoku #1033 and #1034 (Hard) - Free Printable Puzzles

50 HARD Sudoku Puzzles -ADULTS-VOL 7 Graphic by Best Designs · Creative Fabrica

Free Printable Hard Sudoku with the Answer #13553