Tips for running a challenge

Test your submission process

Once you have everything set up, we advise you to test the submission process thoroughly before opening it up for participants. You can create a dummy user account and create test submissions. The Grand-Challenge support team is happy to help you debug any issues you face during this process.

Guide your participants to submission tips

Please guide your participants to the documentation presented here about submission tips.

Provide tutorials

It is also advisable to create an example docker container containing an example algorithm for your participants. We provide a generic tutorial for algorithm creation with Docker here that you can use as a blueprint for your own, more tailored tutorial. Examples of demo repositories for previous challenges can be found here and here.

Walking participants through the submission process in a video tutorial can also help prevent questions. You can refer your participants to this section of the documentation or use the information there for your video tutorial. Examples from previous challenges can be found here and here.

Help your participants debug their submissions

We do not publish the submission logs openly on Grand-Challenge. Doing so could potentially leak information about the test data set. Debugging their submission is thus difficult for participants to do on their own. They will require your assistance. To inspect the logs, navigate to the Admin menu in your challenge and select Evaluations from the tab menu. Click on the algorithm of the evaluation that failed and that you'd like to get more information about. This will lead you to a list of results that this algorithm has produced. Select the appropriate result and you will be able to see the logs that the algorithm produced. You can then share the logs with the participants provided that they do not leak sensitive information about the test data. So please read the logs yourself before posting them.

Note that we do tell participants (as part of the submission tips that we advise you to publish in the forum) that they should thoroughly test their algorithm not only locally, but also on Grand Challenge. Once they have uploaded their container, they can try out their algorithm on test images of their choosing and even inspect the result in an online image viewer. Nonetheless, submission failures will happen so you need to know how to access the logs and help.

To aid in the initial submission development Phase you can make the phase have an open submission, providing increased access to the results by the challenge participant. This entails that the participants will automatically get access to their logs, the input data, and their predictions for that phase, saving you a potential lot of work.

⚠️ Warning: The consequence of this is that the data associated with that Phase then becomes accessible to the participants, so be careful when turning this setting on! We will email challenge admins and add a lot of warnings if this option is enabled.

If you would like to enable this setting please go to the Algorithm section of your phase settings and enable "Give Algorithm Editors Job View Permissions".