
Game objective: reduce your score from 1501 to exactly zero.
During every visit you throw up to 3 darts. Their combined value is deducted from your current score.
Double Out: the game must be finished on a Double. The 50-point Bull is also a valid finishing dart.
Bust: going below zero, leaving 1 point or reaching zero without a Double cancels the entire visit.
This is a demanding scoring endurance exercise. The key is maintaining a stable average over a very long distance.