After receiving feedbacks from the community, and due to the covid crises, we have decided to carry-on the data challenge until the 30th of September 2020. The results of this first phase will be published in an SPIE-conference proceeding (Astronomy Telescope + Instrumentation, San Diego, USA) at the end of the year 2020. Every participant will be contacted and invited to co-author the proceeding. In the meantime, have fun !