Privacy Policy

Effective date: 10 November 2026

This policy covers every Solviq game and this website. The general sections apply to all of them. Each game then has a short section listing only what that game does.

• Chessum
• Futoshiki
• Hashi
• Hitori
• Kakurasu
• Kilim
• Nurikabe
• Star Battle

Who we are

The games and this website are made by Solviq — Yusuf Arda Oğuz, İzmir, Türkiye. We are responsible for your data (the “data controller”). You can reach us at solviq.puzzle@gmail.com.

The short version

Solviq games have no accounts and send nothing to servers of our own. We use no analytics or crash reporting tools, and we do not sell anything about you.

The one exception is this website’s Ranked, leaderboards, Rush and reactions: if you use them, our server keeps a random ID, the nickname you choose and your results, and you can delete them yourself at any time. See This website.

On your device

Your progress, times, streaks, statistics and settings are stored only on your device. We have no copy. Deleting a game deletes its data, although your own device backups may still hold it. Scores you sent to Game Center stay with Apple.

Purchases

Purchases go through Apple’s App Store, or Google Play where a game is offered there. We never see your card or payment details. A game only asks the store which of its purchases you own, and remembers the answer on your device so it works offline.

Game Center

Some games use Apple’s Game Center for leaderboards. If you are signed in to Game Center, those games send your scores to Apple, as listed in each game’s section. Apple handles this data under Apple’s privacy policy. Every game works without Game Center.

Ads

Some games show ads from Google AdMob to players who have not bought that game’s unlock. Each game’s section says whether it has ads and when they appear. Ads never appear during a puzzle, and a game’s purchase always removes them. For players who own it, the ads software is not started.

When a game shows ads, Google’s software may collect:

• crash logs
• performance data
• a device ID (the advertising identifier)
• advertising data, such as the ads you have seen
• your approximate location, worked out from your IP address
• other product interactions, such as taps

Google uses this data to show and measure ads, to prevent fraud and to improve its services. On iPhone, Google gets the advertising identifier only if you allow tracking in Apple’s tracking prompt. Only Chessum shows that prompt; the other games never do. More in Google’s data disclosure for AdMob and Google’s privacy policy.

Where the law requires it, for example in the European Economic Area, the UK and Switzerland, Google’s consent form asks for your choices before any ad is requested. Your choices affect the ads only: the games work the same either way.

Emails

If you write to us, we use your message only to reply to you, and we keep it only as long as we need it to help you. When you use Contact inside a game, the draft email already includes the game’s version and your device’s system version, to help us find problems. You can delete that line before you send it.

This website

This website uses no cookies, no analytics and no trackers, it loads nothing from other companies, and it never asks for any permission. There are no accounts, emails or passwords.

What is saved in your browser

When you play here, the site saves these in your own browser’s storage (“local storage”) on this device:

• Your games: the puzzles you have started and where you left them, for the Daily, the Weekly and the Library.
• Your results: for each puzzle you solved, the time, the number of moves and when you solved it. Your Library progress, and which Library sets are open, are worked out from these.
• Your streak and your Rush bests.
• Ranked: a copy of your rating and next Path puzzle (so the page shows them at once), the pieces on the board of the Ranked puzzle you are playing, and which Library sizes Ranked has opened.
• Your settings: light or dark theme, whether the clock and the coordinates show, and whether you have seen How to play.
• Your code for the leaderboards (see below), if this browser has one.

These stay on this device, in this browser only. In a private window they are forgotten when the window closes. Clearing this site’s data in your browser deletes them.

Ranked, leaderboards, Rush and reactions

The leaderboards need to know which results belong together, without knowing who you are. So the first time you play today’s Daily or this week’s Weekly, play Ranked, start a Rush run, react to a puzzle or pick a nickname, the site gives this browser a random ID and a secret code. The code stays in your browser; our server keeps only a scrambled form of it (a hash) that can’t be turned back into the code.

Under that random ID, our server keeps:

• Your nickname, if you choose one. It is public: it appears on the leaderboards. Without a nickname nothing of yours is shown to anyone.
• When you first opened today’s Daily or this week’s Weekly, to check that a solve time is honest. Deleted after 14 days.
• Your first solve of each Daily and Weekly: the time, the number of moves and when. The time on the leaderboard is never shorter than the time our server saw pass since you first touched the board. Others see your time and moves next to your nickname, and everyone’s times together, without names, as a chart.
• Your Ranked play: your rating and title, how far you are on the Path (and a Fast Track jump), the Path puzzle you are playing and when it was sent to you, and for each Path puzzle you finished whether you solved or resigned it, the time, the number of moves, the result and the rating change. Others see your rating and title next to your nickname.
• Your Rush runs: when each started and its score, and your best score of each day and of all time. Others see your best scores next to your nickname.
• Your reactions: one emoji per puzzle. Others see only how many people chose each emoji, never who.

To check solves, your browser sends the finished board of a Daily, a Weekly, a Ranked or a Rush puzzle; the server checks it and keeps only the result.

To stop abuse, the server counts requests per IP address per day. The IP address is never stored as it is: it is scrambled together with a random value that changes every day, and both the counts and that value are deleted early the next day (UTC).

We keep your nickname, your Daily and Weekly results, your Ranked rating and results, your best Rush scores and your reactions until you delete them. Single Rush runs are deleted after 30 days. A random ID without a nickname that never solved, finished a Ranked puzzle, played Rush or reacted is deleted after 30 days. On the You page, “Delete my data” removes everything above from our server at once. We may hide a nickname that breaks the Terms.

The data is stored with Cloudflare (Cloudflare D1), whose servers may be outside your country, including in the United States and the European Union. Cloudflare processes it for us under its data processing terms.

Moving to another device

The You page can show your code, so you can enter it on another device and keep your nickname and Ranked rating there. Anyone with the code can use your nickname, so keep it to yourself. We can’t recover a lost code, because we don’t have it.

What the hosting may log

The site is hosted on Cloudflare. To serve it, Cloudflare handles every request and may keep standard logs of them: your IP address, the address of the page you opened, your browser type and the time. We do not use these logs to identify anyone; we look at them only to fix problems with the site. Cloudflare’s own privacy policy covers how it handles them.

A Chessum challenge link contains the puzzle’s code, the time and moves to beat and, only if the sender chose to show it, the sender’s player name. Because these are part of the page address, they can appear in those logs when the link is opened. Nothing else about you is in a challenge link.

Your rights

If you live in Türkiye, you have rights under the Personal Data Protection Law (KVKK, Law No. 6698). If you live in the EU or the UK, you have rights under the GDPR. These include asking to see, correct or delete personal data we hold about you. To use them, email solviq.puzzle@gmail.com. The games keep your data on your device; what we hold is the emails you send us and, if you use this website’s Ranked, leaderboards, Rush or reactions, the data described under “This website”, which you can also delete yourself on the You page.

Children

Solviq games are not directed at children under 13, and we do not knowingly collect personal information from children.

Changes

If this policy changes, the new version will be posted on this page with a new effective date.

Each game