Start each player at 501 or 301 points
Subtract the score of each three-dart turn from the player’s total
Count only the segment hit on the dartboard
Use the board’s value for the ring hit
Outer single ring counts as the segment number
Double ring counts as double the segment number
Triple ring counts as triple the segment number
Outer bull counts as 25 points
Inner bull counts as 50 points
Misses count as 0 points
If a player goes below zero, the turn is a bust
If a player reaches exactly zero, the game is won
In double-out games, the final dart must land in a double
In straight-out games, the final dart can be any scoring hit
Keep a running total after each turn
The player with the lowest remaining score wins when the game ends