OpenAI Five Finals

Further reading:

* Blog post: https://openai.com/blog/openai-five-finals/

* Live tweets: gdb at https://twitter.com/gdb/status/1117106896610058240, psyho at https://twitter.com/FakePsyho, mtrc at https://twitter.com/mtrc, nickstatt at https://twitter.com/nickstatt