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Welcome to the Pi Day Challenge!

The 2021 Pi Day Challenge is live... mostly! We've released the first 20 puzzles to whet your appetite. The remaining puzzles will be released on March 14 (and we'll reset the Genius Board as well). Good luck!

New this year: Login with your Google account! And after you login, you can still get to previous years' puzzles by going to Settings and changing the Challenge Year.

Don't have an account? Sign Up