Challenge Someone to a Puzzle or Quiz

Pick a daily puzzle or a quiz. Challenge a specific player by name, or just share the invite link with anyone. Higher score wins (fastest on a tie).

Duels are not anonymous: claim a display name so no one can play under someone else's name. Takes a moment, no password.

Playing on a computer is a big advantage on many puzzles and quizzes. Require the same device so it's a fair fight (for example, mobile vs mobile).