Privacy.

Your browser saves your nickname and puzzle progress. When you start a puzzle online, a first-party cookie connects your results to My stats in this browser. The cookie lasts up to a year. If you sign in, we link the online results from the browsers you sign in on and use a separate cookie to keep you signed in for up to 90 days. Google sign-in uses Netlify Identity. The game uses your account identifier to retrieve your stats.

3sums records puzzle starts and finishes, solve times, hints and checks. A tagged link can mark a start as coming from LinkedIn. We use these records to show your stats and understand how people play. We delete the record of each puzzle start after 30 days. Your results stay in My stats. 3sums uses no third-party tracking scripts.

When you solve a puzzle and were signed in at the start or finish, we publish the name you entered and your time on that puzzle’s leaderboard. Guests can sign in after solving and then choose Publish time. Sign in again to recover your linked stats after clearing cookies. Guest stats are available through the browser that saved them.