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Click the button below and enter PIN: 123456789 to join the Public Challenge. Or, enter a PIN provided by the owner of a private group.

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Public Challenges:

Public Coronavirus Challenge

PIN: 123456789

Reference Guide

  • To start forecasting, you must first join a group. Hit the button above and enter a group PIN. You can join a public challenge by entering a PIN listed above.
  • Our instructions page explains how to ask questions to your team.
  • Our FAQ page includes an explanation of Delphi method and more details.
  • Let us know how we can help at and!