If you wish to participate, please

1. Register to the mailing list dimacs-challenge-10 at cc dot gatech dot edu to participate in discussions and receive important updates concerning the Challenge. Please visit the list's description page for information on how to register.
2. Send an email to dimacs-challenge-orga at cc dot gatech dot edu right away if you want to contribute testbed instances or have any other special plans (even if you need more time to send the instances).

If you encounter any technical problems, please contact Henning Meyerhenke.