4 checkout
In short
4 checks out in one dart under double out: D2, for 4. If the double 2 lands in the single 2, 2 is left and still on: D1. And if the double 1 drops into the single 1 as well, 1 is left: bust, the visit is lost. Under straight out, where any segment can finish: S4.
D2
4
When a dart strays
A missed treble or double often drops into the single of the same segment, and a missed bull into the 25 around it. Here is what that leaves, and what comes next.
double 2 → single 2
2 left, with the two darts left
D1
2
Under the other checkout rules
Master out
finish on a double or a treble
Same route as under double out
Straight out
any segment can finish
S4
4
Neighbouring scores
Let DartSync work out your finish
In a game, the scoreboard shows the route every visit, following the checkout rule you chose.
Play a game of 501