Terms of Use
Last updated: 16 March 2026
These terms apply to Sudoku Leagues at sudoku-leagues.com, operated by Paul Round (“we”, “us”). By using the site you agree to these terms. If you do not agree, please do not use the site.
The service
We provide free browser-based Sudoku puzzles (daily 9×9 tiers, mini 6×6, and archives), optional coaching hints, and optional friend Leagues. Solo play does not require an account. Leagues require a free email sign-in.
Acceptable use
- Do not attempt to break, scrape, or overload the site or league backend.
- Do not use offensive or misleading usernames in leagues.
- Do not automate league submissions or manipulate leaderboards.
- Leagues are informal friend races — no cash prizes are offered by us.
Accounts and leagues
You are responsible for keeping your sign-in credentials secure. League invite links are private; share them only with people you trust. We may suspend accounts that abuse the service.
Advertising
We may show display advertising on the play page via Google AdSense. Ad placement stays away from interactive game controls. Advertising in the UK and EEA is subject to Google’s consent messaging as described in our privacy policy.
Disclaimer
The site is provided “as is”. We work to keep puzzles fair and services available, but we do not guarantee uninterrupted access or that every device/browser combination will behave identically. Puzzle difficulty labels reflect our generator’s analysis; your experience may vary.
Changes
We may update these terms. The “Last updated” date will change when we do. Continued use after changes means you accept the revised terms.