Hard Sudoku Puzzles

Printable hard Sudoku puzzles come in various grid sizes, including 4x4, 6x6, 8x8, and the traditional 9x9, catering to a range of difficulty levels for puzzle enthusiasts.

To solve, you have to fill the grid with numbers from 1 to 4 (for 4x4), 1 to 6 (for 6x6), 1 to 8 (for 8x8), or 1 to 9 (for 9x9), ensuring no repetition in rows, columns, or smaller sections.

Recommended: Check out our Printable Puzzle Books Collection to download and print.

Also try these puzzle makers to make your own custom printable puzzles.

Need Help? To get started, check out these instructions, goals and rules for how to solve puzzles

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6x6 Sudoku - Hard - 1

6x6 Sudoku - Hard - 1

6x6 Sudoku

Printable Sudoku Puzzles, Easy for Beginning Problem Solvers - with different levels of difficulty and variations with the number of grids. Simply download, print and play.

6x6 Sudoku - Hard - 2

6x6 Sudoku - Hard - 2

6x6 Sudoku

Printable Sudoku Puzzles, Easy for Beginning Problem Solvers - with different levels of difficulty and variations with the number of grids. Simply download, print and play.

6x6 Sudoku - Hard - 13

6x6 Sudoku - Hard - 13

6x6 Sudoku

Printable Sudoku Puzzles, Easy for Beginning Problem Solvers - with different levels of difficulty and variations with the number of grids. Simply download, print and play.

6x6 Sudoku - Hard - 6

6x6 Sudoku - Hard - 6

6x6 Sudoku

Printable Sudoku Puzzles, Easy for Beginning Problem Solvers - with different levels of difficulty and variations with the number of grids. Simply download, print and play.

6x6 Sudoku - Hard - 7

6x6 Sudoku - Hard - 7

6x6 Sudoku

Printable Sudoku Puzzles, Easy for Beginning Problem Solvers - with different levels of difficulty and variations with the number of grids. Simply download, print and play.

4x4 Sudoku - Hard - 1

4x4 Sudoku - Hard - 1

4x4 Sudoku

Printable Sudoku Puzzles, Easy for Beginning Problem Solvers - with different levels of difficulty and variations with the number of grids. Simply download, print and play.

4x4 Sudoku - Hard - 20

4x4 Sudoku - Hard - 20

4x4 Sudoku

Printable Sudoku Puzzles, Easy for Beginning Problem Solvers - with different levels of difficulty and variations with the number of grids. Simply download, print and play.

6x6 Sudoku - Hard - 9

6x6 Sudoku - Hard - 9

6x6 Sudoku

Printable Sudoku Puzzles, Easy for Beginning Problem Solvers - with different levels of difficulty and variations with the number of grids. Simply download, print and play.

6x6 Sudoku - Hard - 10

6x6 Sudoku - Hard - 10

6x6 Sudoku

Printable Sudoku Puzzles, Easy for Beginning Problem Solvers - with different levels of difficulty and variations with the number of grids. Simply download, print and play.

6x6 Sudoku - Hard - 15

6x6 Sudoku - Hard - 15

6x6 Sudoku

Printable Sudoku Puzzles, Easy for Beginning Problem Solvers - with different levels of difficulty and variations with the number of grids. Simply download, print and play.

6x6 Sudoku - Hard - 19

6x6 Sudoku - Hard - 19

6x6 Sudoku

Printable Sudoku Puzzles, Easy for Beginning Problem Solvers - with different levels of difficulty and variations with the number of grids. Simply download, print and play.

6x6 Sudoku - Hard - 11

6x6 Sudoku - Hard - 11

6x6 Sudoku

Printable Sudoku Puzzles, Easy for Beginning Problem Solvers - with different levels of difficulty and variations with the number of grids. Simply download, print and play.

6x6 Sudoku - Hard - 12

6x6 Sudoku - Hard - 12

6x6 Sudoku

Printable Sudoku Puzzles, Easy for Beginning Problem Solvers - with different levels of difficulty and variations with the number of grids. Simply download, print and play.

6x6 Sudoku - Hard - 20

6x6 Sudoku - Hard - 20

6x6 Sudoku

Printable Sudoku Puzzles, Easy for Beginning Problem Solvers - with different levels of difficulty and variations with the number of grids. Simply download, print and play.

6x6 Sudoku - Hard - 16

6x6 Sudoku - Hard - 16

6x6 Sudoku

Printable Sudoku Puzzles, Easy for Beginning Problem Solvers - with different levels of difficulty and variations with the number of grids. Simply download, print and play.

6x6 Sudoku - Hard - 18

6x6 Sudoku - Hard - 18

6x6 Sudoku

Printable Sudoku Puzzles, Easy for Beginning Problem Solvers - with different levels of difficulty and variations with the number of grids. Simply download, print and play.

6x6 Sudoku - Hard - 17

6x6 Sudoku - Hard - 17

6x6 Sudoku

Printable Sudoku Puzzles, Easy for Beginning Problem Solvers - with different levels of difficulty and variations with the number of grids. Simply download, print and play.

6x6 Sudoku - Hard - 14

6x6 Sudoku - Hard - 14

6x6 Sudoku

Printable Sudoku Puzzles, Easy for Beginning Problem Solvers - with different levels of difficulty and variations with the number of grids. Simply download, print and play.

6x6 Sudoku - Hard - 8

6x6 Sudoku - Hard - 8

6x6 Sudoku

Printable Sudoku Puzzles, Easy for Beginning Problem Solvers - with different levels of difficulty and variations with the number of grids. Simply download, print and play.

6x6 Sudoku - Hard - 5

6x6 Sudoku - Hard - 5

6x6 Sudoku

Printable Sudoku Puzzles, Easy for Beginning Problem Solvers - with different levels of difficulty and variations with the number of grids. Simply download, print and play.

6x6 Sudoku - Hard - 4

6x6 Sudoku - Hard - 4

6x6 Sudoku

Printable Sudoku Puzzles, Easy for Beginning Problem Solvers - with different levels of difficulty and variations with the number of grids. Simply download, print and play.

Hard Sudoku puzzles are known for their intricate arrangements, demanding advanced logical deduction skills.

Solving these puzzles helps develop problem-solving abilities, increased focus, and a refined aptitude for recognizing and applying logical patterns.

Enjoy the challenging world of hard Sudoku, a satisfying and accessible brain-teasing activity for all. Just download and print!