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Printable sudoku

Download and print sudoku free in three levels, four per sheet, with the solutions on a separate page. No sign-up: print it or save it as a PDF straight from your browser.

Sudoku 1 · Easy
8
9
2
7
6
3
6
4
8
6
5
7
8
3
2
1
7
4
8
5
3
7
2
6
4
5
7
5
2
7
4
3
8
1
2
3
2
9
1
8
Sudoku 2 · Easy
4
8
9
9
4
3
3
9
2
6
1
3
5
4
6
5
9
3
6
4
7
7
9
3
5
5
3
4
2
4
5
2
7
6
2
6
8
1
3
4
Sudoku 3 · Easy
6
5
3
2
8
9
2
6
4
1
7
7
7
3
5
2
1
5
8
6
7
3
5
1
6
8
8
7
4
3
5
6
4
9
6
3
3
2
6
7
Sudoku 4 · Easy
7
6
1
4
8
5
8
6
1
7
9
9
8
5
4
4
1
3
3
7
9
6
8
5
6
9
2
4
3
7
4
6
7
3
3
7
5
8
1
2

Solutions

Solution 1
8
9
1
4
3
2
7
6
5
5
7
3
1
9
6
2
4
8
4
2
6
5
7
8
9
3
1
2
1
7
6
4
9
8
5
3
3
8
5
7
2
1
6
9
4
6
4
9
8
5
3
1
2
7
1
5
8
2
6
4
3
7
9
9
6
4
3
8
7
5
1
2
7
3
2
9
1
5
4
8
6
Solution 2
4
5
1
6
8
3
9
7
2
9
2
6
4
7
1
5
8
3
3
7
8
9
5
2
6
4
1
1
8
2
7
3
5
4
6
9
5
9
3
1
6
4
8
2
7
6
4
7
2
9
8
1
3
5
7
1
5
3
4
6
2
9
8
8
3
4
5
2
9
7
1
6
2
6
9
8
1
7
3
5
4
Solution 3
7
6
4
1
5
3
2
8
9
5
3
2
6
9
8
4
1
7
1
8
9
7
2
4
3
5
6
6
7
8
3
4
9
5
2
1
9
1
5
2
8
6
7
3
4
2
4
3
5
1
7
6
9
8
8
9
7
4
3
5
1
6
2
4
5
1
9
6
2
8
7
3
3
2
6
8
7
1
9
4
5
Solution 4
7
9
6
3
1
2
4
8
5
5
2
3
4
8
6
9
1
7
4
8
1
5
7
9
3
6
2
9
1
8
7
3
5
2
4
6
6
5
4
1
2
8
7
9
3
2
3
7
9
6
4
8
5
1
1
6
9
2
4
3
5
7
8
8
4
2
6
5
7
1
3
9
3
7
5
8
9
1
6
2
4

Why print a sudoku at all

It can look like a step backwards when the on-screen version exists, but paper has real advantages. You can jot candidates in the margin with more freedom than any interface allows. There are no notifications. You can drop it in a bag for the doctor’s waiting room or the train. And in care homes, classrooms and memory workshops it remains the format that works, because it does not depend on anyone knowing how to handle a tablet.

If what you want is to play on screen, the online sudoku has pencil marks, checking and hints. This page is for the other thing.

How the sheet is laid out

  • Four sudokus per page, in two columns, with cells big enough to write in with a pen without cramping.
  • The solutions on their own sheet, with a forced page break. Sitting next to the puzzle they get seen out of the corner of your eye and are useless.
  • No ads, no menu and none of this text. The print stylesheet strips them: on paper only the puzzles and a discreet header come out.
  • Five levels, including a 4×4 and a 6×6 that work very well with children and with anyone who has never done a sudoku.

A note on difficulty

The levels differ in how many clues the sudoku starts with: 40 on easy, 32 on medium and 26 on hard. It is the usual measure, but an approximate one: what really sets the difficulty is which techniques it demands and how the clues are spread. What is guaranteed is that every sudoku has exactly one solution, checked one by one as they were generated.

In practice, to choose: if you solve an easy one in under ten minutes without stalling, move to medium. If medium takes you over half an hour, stay there a while before touching hard — the 26-clue hard demands chaining deductions and does not come out in a rush. And if it is your first time, start with the 6×6: it takes five minutes and teaches the mechanics without frustrating you.

Solving on paper is not the same as on screen

Worth saying, because it changes the technique. On screen the program flags conflicts and you can erase without a trace; on paper, a number placed wrong in minute three can cost you the whole sheet. Hence three habits that help:

  • Write final numbers large and candidates small in a corner. Mix them up and ten minutes later you cannot tell what was certain from what was a hunch.
  • Pencil for candidates, pen only for what you have proved. It is the simplest way not to drag an error along.
  • Mark the cell you deduced from. A dot beside the number that let you place another one. If you have to undo later, you know how far back to go.

The techniques themselves are the same as on screen, and they are explained in detail on the online sudoku page: the last empty cell, the only candidate, cross-hatching and naked pairs.

For classrooms, care homes and memory workshops

A large share of the people printing sudokus are not doing it for themselves but for a group. If that is you, a few things worth knowing:

  • Drop the solutions before printing with the button, and run a separate copy with them for yourself. It beats cutting sheets up.
  • Mix levels in the same session. Handing everyone the same sheet leaves some bored and others stuck. With two levels to choose from, each goes at their own pace.
  • The 6×6 is not for children only. It works very well with older people starting out or with tired eyesight, because the cells come out larger on the same sheet.
  • Print single-sided. It sounds obvious, but folding the sheet to hide the solution on the back shows through.

And an honest warning, because a lot of exaggeration gets written about this: puzzles are excellent entertainment and they help keep attention and habit going, but there is no solid evidence that they prevent cognitive decline. We cover it with the sources in what the science says. People do them because they are enjoyable, which is reason enough.

Frequently asked questions

How do I save it as a PDF?

Hit «Print» and, in your browser dialog, change the destination to «Save as PDF» (some browsers call it «Microsoft Print to PDF»). You get exactly the document that would come out on paper, with the solutions on their own page.

Do the ads get printed?

No. The printed sheet carries only the sudokus, the header and the solutions: the print stylesheet hides the ads, the menu and all the explanatory text. Printing advertising would be spending someone else’s ink.

How many sudokus fit on a sheet?

Four, in two columns, big enough to write in by hand with a pen. The four solutions go together on the following page.

Can I print them without the solutions?

Yes. Use the solutions button to drop them before printing. That is the usual choice for a classroom, a care home or a gift.

Is it always the same ones?

No. «Another four» moves to the next batch, and there are fifteen sudokus per level plus the 4×4 and 6×6 ones. Every one with a single solution, verified individually.

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