Othello is a board game that is a modern variant of Reversi. It looks similar to Go with its checkered board and black and white pieces, but it's completely different.
negative_seven saves 7.31 seconds over the previous "maximum score" run through extensive research and development, the most notable being the usage of a modern Othello AI engine and pitting it against the Atari 2600 AI. You can read the author's notes here for all the details on the efforts put into the run, including the creation of a custom Atari 2600 emulator.