15 checkout

In short

15 checks out in two darts under double out: S7, D4, for 7 + 8. If the double 4 lands in the single 4, 4 is left and still on: D2. And if the double 2 drops into the single 2 as well, 2 is left for the next visit: D1. With a single dart in hand, S7 leaves 8, so D4. Under straight out, where any segment can finish: S15. Under master out, where a treble can finish: T5.

S7
7
D4
8
Double out

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 4 → single 4
4 left, with the last dart
D2
4

With fewer darts in hand

The finish is then out of reach: these darts set up the next visit.

One dart
leaves 8, so D4
S7
7

Under the other checkout rules

Master out
finish on a double or a treble
T5
15
Straight out
any segment can finish
S15
15

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