As part of the festivities, DARPA also released some highly anticipated information about the competition: a request for comments (RFC) that contained a sample challenge problem and the scoring methodology. The AIxCC is a grand challenge from DARPA in the tradition of the Cyber Grand Challenge and Driverless Grand Challenge. This competition format is a major step beyond the Cyber Grand Challenge in terms of realism for several reasons—namely, the challenge problems 1) are made from real-world software and vulnerabilities, 2) include source code and are compiled to real-world binary formats, and 3) come in many different source languages for many different computing stacks.