Sudoku - Hard

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

Jigsaw Classic Sudoku: 400 JIGSAW puzzles 9 x 9 HARD - VERY HARD + BONUS 250 LABYRINTH 20 x 20 : Sudoku Hard - Very Hard levels and Maze puzzles very hard level (Series #8) (Paperback)

Sudoku #1365 and #1366 (Hard) - Free Printable Puzzles

Samurai Sudoku - Hard

Solving sudokus - Backtrack

The benefits of Sudoku are endless. It Improves your memory and logical thinking. It improves your critical thinking and ability to solve problems. It

Hard Sudoku: 80 hard Sudoku puzzles : Hours of fun! Large print (Paperback)

Book Synopsis , Are you ready to train your brain?, Do you have the mental dexterity to defeat 100 puzzles? , Sudoku puzzles are an excellent tool for

Hard Sudoku Puzzle Book - by Sorens Books (Paperback)

Sudoku - Hard

Free Printable Hard Sudoku with the Answer #12002

Buy Sudoku — Hard puzzles for print – Puzzle Sales

HELP] Stuck on Hard sudoku : r/sudoku