I think now, it can be considered "legal", in the summary post there was also included a 4 player base game. Nevertheless for your achievement to get black, it might be insignificant, because you have to cover the first 5 major expansions for that, and it is likely, that with just 4 further games, you will miss at least one and need another victory. Not a big deal for somebody, who already won a tournament and regularly participates in the weekly games, though.
Started by Hounk
Started by mcorbet
Started by Decar
Started by rfielder
Started by Gordie_a