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