To Single Digit Great (SDG) a song is to get a single digit number of greats on the song (less than 10) whilst otherwise full comboing it. With Expert charts having hundreds of steps in, getting less than 10 greats on any one of them is a notable achievement for all but the best players. Related to the Single Digit Great is the more frustrating Black Flag. This article is a . You can help My English Wiki by expanding it.