Terms of use
Last updated July 26, 2026
These terms cover SudokuGridBase — the site, the browser game, the guide pages, and related materials. By using the site you agree to them. If you do not agree, close the tab.
What this site is
SudokuGridBase offers free browser sudoku, plus how-to, Killer, difficulty, and strategy pages that keep a live board nearby. Classic grids follow standard 1–9 constraints. Killer adds cage sums. Local progress stays in your browser unless you somehow copy it elsewhere yourself. Hints name a technique with a short reason; they are coaching aids, not a proof of an optimal solve or a full answer dump.
Using the site does not create a professional, advisory, fiduciary, tutoring, or employment relationship. This is a puzzle — not financial advice, not medical advice, not a school-filter workaround, and not an accredited course.
As-is availability
The site is provided as is and as available, without warranties of any kind — including accuracy of hints, uniqueness claims for every generated seed, completeness of guides, merchantability, fitness for a particular purpose, or uninterrupted uptime. We may change controls, rename pages, pause features, or take the site offline.
Local storage can be cleared by you, by browser settings, or by extensions. We are not responsible for a grid or daily marker that disappears after a data wipe, a profile switch, or a device change.
Your play, your breaks
You decide how long to play. Take breaks. Do not treat a daily puzzle or an evil-band clear as something you owe anyone. If a Hint conflicts with how you want to solve, ignore it — the board still accepts your digits.
Limitation of liability
To the maximum extent permitted by law, SudokuGridBase and its operators are not liable for loss or damage arising from use of or reliance on the site, including but not limited to:
- Lost local boards, pencil marks, timers, or daily markers
- Time spent following a Hint that was not optimal
- Device performance, battery use, or browser crashes
- Downtime, broken links, or third-party analytics/ad behavior if those are enabled later
- Indirect, incidental, special, consequential, or punitive damages
If something is wrong, tell us via contact. Fixing a bug when we can does not mean we underwrite your solve time or accept liability for decisions you already made.
Where liability cannot be fully excluded, our total liability for claims relating to the site is limited to the greater of (a) the amount you paid us specifically to use SudokuGridBase in the twelve months before the claim (currently $0 for free use) or (b) USD $50, to the extent such a limit is enforceable.
Acceptable use
- Play and practice for personal use
- Do not use the site to distribute malware, phishing, or cheat injectors
- Do not scrape the site for bulk solution dumps or republish substantial content as your own commercial product without permission
- Do not overload or automate the generator in a way that harms availability
- Do not misrepresent SudokuGridBase as an app store, multiplayer service, multi-game portal, or NYT product
- Do not use the site to harass, spam, or break applicable law
Intellectual property
Site chrome, copy, and our specific combination of technique-named Hint, Pencil, Check, Daily, and Killer tooling are part of SudokuGridBase. Classic sudoku rules and the Killer variant are widely known; we do not claim to own the idea of a 9×9 digit grid. Do not copy our pages wholesale or frame them inside another commercial shell.
Privacy
How local storage, analytics, ads, and email work is described in privacy. That policy sits alongside these terms.
Changes
We may update these terms as the site evolves. The “Last updated” date at the top changes when we do. Continued use after changes means you accept the updated terms. If you disagree, stop using the site.
Contact
Questions about these terms: contact@sudokugridbase.com or the contact page. Also see about.