D8.4 Open Challenges awarded solutions

The D8.4 is undertaken as part of WP8 Internal & external validation of ChAImeleon repository framed under task T8.5 Execution of the Challenges and running of the External Validation period. This deliverable defines and explains the proper execution of the Open Challenges, including the development and results of the Classification and Championship phases, the continuous technical support to the participants, the adjustments made for the best development of the challenges, the close communication with the participants through e-mail and through the forum of Grand Challenge platform, as well as the selection of the top participants and the distribution of the prizes. The deliverable is divided in the following main sections: Objectives and description, Development and outcomes of the Classification phase, Development and outcomes of the Championship phase, Technical support and follow-up of the participants, Adjustment and finetunning of the Challenges, Communication throughout the challenges, Distribution of the prizes, and Pathway to WP9.