Dear @DigitalPenChallengePreregistrants and the challenge community, The Digital Pen Feature Extraction Challenge is officially open! You can register for the challenge and access all challenge materials on the website here: https://www.synapse.org/DigitalPenChallenge Before building your model, please review the [FAQ](https://www.synapse.org/Synapse:syn68634259/wiki/644059) for rules and eligibility, as well as our guides on [building your Docker models](https://www.synapse.org/Synapse:syn68634259/wiki/644060) and [completing your writeup](https://www.synapse.org/Synapse:syn68634259/wiki/644061). Both a valid Docker submission and a completed writeup are required for consideration in the final rankings. If you have any questions, please create a new thread directly on the Discussion Forum. Unless your topic is sensitive, posting directly to the forum will ensure all participants have equal access to the same updates and answers. You are also welcome to use this forum to connect with other participants and form teams. Good luck to all! @DigitalPenFeatureExtractionChallengeOrganizers