Shooters in Burnsville mn used to have a 9 ball tournament like that. They had a chart- master++, master+, master, aa+, aa, a..etc
Then a corresponding side that gave a game on the wire, the break, wild balls, called ball spots.
The gap between two opponents would determine what kind of spot you got.
You could get in contact with them to get a copy of the sheet if they still have it or more information.
