Challenge 2 Sandbox is now open! Familiarize yourself with the Problem Formulation (new Sept. 8), Input Files and Formats, Output Files and Format, Rules, Scoring, and the Timeline (summarized below). Only members of Challenge 2 registered Teams may submit. Challenge 1 teams must reregister as Challenge 2 teams.
Watch Lane Genatowski, ARPA-E Director, talk about Challenge 2 on YouTube.