# Download Sudoku for Printing

You can download several PDF files with each 100 Sudoku and print them.

All of these Sudokus have one unique solution.

## Minimal, Difficult Sudokus

These Sudokus have only 17 clues. It is commonly believed that 17 clues is the minimum for a Sudokus that still has a uniq solution.

100 difficult Sudoku NR. 1 (PDF).

100 difficult Sudoku NR. 2 (PDF). These are extremely difficult. I have more then 30,000 Sudoku and took the 100 most difficult, so give it a try ;-)

100 difficult Sudoku NR. 3 (PDF). They are number 101 to 200 from a list of demanding Sudokus, continuing NR. 2. Solutions are included.

**New:** By demand from some visitors you can now
download
one thousand minimal Sudokus
(pdf).

These difficult Sudokus are based on a collection by Gordon Royle, University of Western Australia. It is licensed under Creative Commons Attributions License.

You should note that my program's notion of "difficult" differs very much from the way humans experience diffculty when solving Sudokus, so should not take the "most difficult" statement too seriously. There is work in progress to improve this situation.

## Irreducible, Hard Sudokus

These Sudokus are irreducible, that means that if you delete a single clue, they become ambigous.

- 100 irriducible, difficult Sudokus (pdf)
- 100 irreducible, difficult Sudokus. They are the 100 most difficult ones of 100,000 generated Sudokus, determined by a different algorithm as above.
- 100 irriducible, difficult Sudokus (pdf)
- 100 irriducible, difficult Sudokus (pdf)
- 100 irriducible, difficult Sudokus (pdf)

## Moderate Sudokus

These Sudokus are a bit easier to solve then the ones above. Most of them have 27 to 31 Sudokus given.

- 100 moderate Sudokus No 1 - 1 to 100
- 100 moderate Sudokus No 2 - 101 to 200
- 100 moderate Sudokus No 3 - 201 to 300

## Easy Sudokus

Now I created some easy Sudokus. Really ;-).

## Calendar

You can download a Sudoku calendar for the Year 2007, one Sudoku per day.

- Sudoku calendar 2009, A6 Paper, PDF
- Sudoku calendar 2009, A4 Paper, 4 days per page, PDF
- Sudoku calendar 2009, A4 Paper, 4 days per page, Postscript
- Sudoku calendar 2008, A6 Paper, PDF
- Sudoku calendar 2008, A6 Paper, Postscript
- Sudoku calendar 2008, A4 Paper, 4 days per page, PDF
- Sudoku calendar 2007, A6 Paper, PDF
- Sudoku calendar 2007, A4 Paper, 4 days per page, PDF

I recommend to print the 4 on 1-PDF, cut each page twice and staple it.

## Blank Sudoku Grids

You want to print an empty Sudoku grid to fill in your own numbers? No problem

- Six blank Sudoku grids on one page as pdf.
- 12 blank Sudoku grids on one page
- A single blank Sudoku grid as Encapsulated Postscript (eps) or pdf

You can do whatever you like with these empty Sudoku grids. However if you publish your results I ask you to link to this page.

## Plain Text Sudoku

The Sudokus advertised so far are neatly set PDF files for printing. But if you are looking for a plain text file with one Sudoku per line, here you are right.

The following Sudokus are in the Public Domain, that means that you can do with it anything you like.

- 1000 Sudokus in a plain text file (gzip compressed).
- 1000 Sudokus in a plain text file (not compressed).
- 10
^{5}= 100,000 Sudokus in a plain text file, gzip compressed.