99 checkout
In short
99 checks out in three darts under double out: T20, S7, D16, for 60 + 7 + 32. If the treble 20 lands in the single 20, 79 is left and still on: T13, D20. Should the third dart, at the double 16, drop into the single 16, 16 is left for the next visit: D8. With only two darts in hand, T19, S10 leave 32, so D16. Under straight out, where any segment can finish: T20, T13. Under master out, where a treble can finish: T20, T13.
T20
60
S7
7
D16
32
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.
treble 20 → single 20
79 left, with the two darts left
T13
39
D20
40
double 16 → single 16
16 left, on the next visit
D8
16
With fewer darts in hand
The finish is then out of reach: these darts set up the next visit.
Two darts
leaves 32, so D16
T19
57
S10
10
Under the other checkout rules
Master out
finish on a double or a treble
T20
60
T13
39
Straight out
any segment can finish
T20
60
T13
39
Neighbouring scores
Let DartSync work out your finish
In a game, the scoreboard shows the route every visit, following the checkout rule you chose.
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