San Francisco Proof Open  ·  29 August 2026  ·  Divisions A & B

Contest sign-in

Enter the details from your confirmation email. Your contestant ID and team ID were sent to your team captain before contest day.

Digits then one letter
The number part of your ID
The address your team registered with.
Before you begin
Leaving the contest page locks your contest. Switching tabs, switching apps, minimising the window, or letting a notification steal focus all count. Your problems disappear and do not come back. Close everything else and silence notifications before a round starts.

Proof round

Write full proofs on paper. Photograph and upload each page in the final ten minutes — leaving the page to use a camera is allowed then, and only then.

Guts round

Nine sets of three, answers only. Your whole team shares one answer sheet. Submitting a set is final and reveals the next.

Copy, paste, right-click and printing are disabled during a round, and every event is logged for staff. If you are locked out by accident, message a proctor immediately — staff would far rather fix it during the round than after it.

Staff portal →