Competition mode uses the same board interactions as local play, but the server controls puzzle identity, timing, validation, and leaderboard acceptance. This keeps official results comparable without preventing private offline experimentation.
Starting an attempt
An official puzzle attempt remains active for two hours, so refreshing the page or receiving a site update does not immediately erase your progress.
Finishing securely
Completed Competition boards are checked against the official puzzle rules. Only validated solutions can enter the leaderboard.
Leaderboard policy
Each puzzle retains the fastest ten qualifying results, with only a username’s best result represented. Usernames are short public labels; no account is required. A result can cease to qualify if the leaderboard changes before the name is submitted.
Time and Score
The leaderboard ranks elapsed time. The broader player Score is round(Complexity / elapsed minutes), so fast solutions to harder puzzles contribute more. Pausing is unavailable because an official clock must remain unambiguous.
Local solving remains private
Solving an official definition locally does not call the Competition finish endpoint and cannot submit time, completion, or leaderboard data. Use local play to study mechanics; start a fresh protected attempt when you want a comparable result.
Browse the rules in Puzzle Rules, understand the rating in Puzzle Complexity, or practice with the Tutorial.