Single portion value Quadruple portion value Double portion value Treble portion value
British Darts Organisation World Darts Federation World Darts Council American Darts Association
8 11 10 9
5 feet 8 feet 6 feet 7 feet 9.25 inches
5 3 2 4
Double or bull shot Exact score Double only Triple score
75 100 25 50
Inventing the numbering system Inventing Dartboard Establishing BDO First 9 dart finish