Privacy Policy
Last updated: October 27, 2026
Data controller
The publisher of the Sudoku-Land website is responsible for the data described below. Contact: via our contact page.
Game data
Your ongoing games, your statistics (games played, wins, best times…) and your preferences (light/dark theme, level) are stored only in your browser's local storage (localStorage). This information stays on your device, is never sent to any server, and is never shared. It is deleted if you clear your browser's browsing data.
One exception: when you finish a 3D sudoku cube, the result of the game is sent to the site's publisher for statistics: the cube, its level and number, the time, the number of errors and hints, the page language and the type of device (touch screen or mouse). This result contains nothing that could identify you: Sudoku-Land does not store your IP address, any identifier or any cookie with it.
Cookies used
On your first visit, a consent window appears: it is served by Google's Consent Management Platform (CMP), certified under the IAB TCF framework. Until you give your consent, no audience-measurement or advertising cookie is set: Google's scripts load in “consent denied” mode (Google Consent Mode v2) and write nothing to your device. You can change your choice at any time with the button below.
| Cookie / service | Purpose | Issuer | Duration |
|---|---|---|---|
| Google Analytics (GA4) — _ga, _ga_… | Anonymized traffic statistics (page views, referral source, visit duration) | Google Ireland Ltd | up to 13 months |
| Google AdSense — __gads, __gpi, __eoi | Displays ads, potentially personalized based on your interests | Google and its advertising partners | up to 24 months |
| Consent — FCCDCF, FCNEC | Stores your choice and the TCF consent string, so the window isn't shown on every page | Google (IAB TCF certified CMP) | up to 13 months |
Learn more: Google's privacy policy and how Google uses advertising cookies.
Legal basis and consent
Setting Google Analytics and AdSense cookies relies on your consent (Article 6.1(a) of the GDPR), collected through Google's CMP consent window (IAB TCF framework). Declining is offered on the first screen, at the same level as accepting, and you can withdraw your consent at any time, just as easily as you gave it.
Transfers outside the European Union
Google may process certain data outside the European Union. These transfers are governed by the European Commission's standard contractual clauses, as part of Google's compliance framework.
Your rights
Under the General Data Protection Regulation (GDPR), you have the right to access, rectify, erase, restrict, port, and object to your data. To exercise these rights, use our contact page. You may also file a complaint with the CNIL (the French data protection authority).
Security
The site is served over HTTPS. Sudoku-Land does not offer user accounts or passwords, and does not store any identification data.