Duels
The same 5 questions for both of you, in the same order. Most right wins; time breaks a tie. A link works for 7 days, and a friend can play it without an account.
Your duels
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Make a challenge link and send it to a friend. Challenges sent to you show here, waiting for your run.
New challenge link
Sign in, then turn on a public profile: your friend sees your handle on the challenge.
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