Terms of Use

Key takeaways

You may use killersudoku.co free of charge, at home, at work or in school.
You may play every puzzle free and use classroom mode in lessons; please link to the pages rather than copy the puzzles.
The site shows ads and is provided as it is, without guarantees.
Swedish law applies, but you keep the consumer protection of the country where you live.

Who provides the site?

killersudoku.co is provided by Takreparation Skåne AB, Sparvgränd 6, 262 41 Ängelholm, Sweden (org.nr 556988-5931). Email info@killersudoku.co, phone +46 760 061 969. By using the site you accept these terms.

How may I use killersudoku.co?

You may play the daily killer sudoku, the archive and all the other puzzles free of charge, at home or in class. You do not need an account.

Please do not:

copy the site, its code or its text and publish it as your own,
try to disrupt the site, overload it or get around its security,
use automated tools to download pages in bulk,
use the site for anything unlawful.

May I use the puzzles in class?

Yes. You may show any puzzle on a projector or smartboard; classroom mode is made for this. You may link to any page. The puzzles were generated for this site, and the puzzles, the combinations table, the design and the icons belong to Takreparation Skåne AB. Please link to them rather than copy them into worksheets, apps or other websites. For printed worksheets, use our sister site sudokuprint.app.

Who owns the content of the site?

The text, design and code of killersudoku.co belong to Takreparation Skåne AB. You may link to any page. Please link rather than copy text to another website. If you believe something on the site infringes your rights, write to info@killersudoku.co and we will look at it promptly.

Does the site show ads?

Yes. Some pages show ads from Google AdSense. Ads are provided by Google and its partners, not by us, and we do not endorse the products in them. How ads use cookies and how you can control them is explained in the privacy policy.

What guarantees do you give?

The site is provided free of charge and as it is. We work to keep it running and correct, but we cannot promise that it works on every device or browser, that it is always available, or that every result and fact is free of errors. Every puzzle was checked by a solver to have exactly one solution, but we cannot guarantee that the site is free of errors. Times, streaks and progress are saved only in your browser, so they are lost if you clear your browser data or change device.

To the extent the law allows, Takreparation Skåne AB is not liable for any loss or damage arising from use of the site. Nothing in these terms limits rights you have as a consumer that cannot be limited by law.

Which law applies?

These terms are governed by Swedish law. If you use the site as a consumer, this does not take away the protection you have under the mandatory consumer laws of the country where you live.

Can these terms change?

We may update these terms, for example when the site gets new features. The date below shows the latest version. If you keep using the site after a change, the new terms apply.

Last updated: November 12, 2026