143 checkout
In short
143 checks out in three darts under double out: T20, T17, D16, for 60 + 51 + 32. If the treble 20 lands in the single 20, 123 is left, out of reach with two darts left: T20, T13 leave 24, so D12 on the next visit. Should the second dart, at the treble 17, drop into the single 17, 66 is left, out of reach with the last dart: T14 leaves 24, so D12 on the next visit. With only two darts in hand, T20, T17 leave 32, so D16.
T20
60
T17
51
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
123 left, set up 24, so D12 on the next visit
T20
60
T13
39
treble 17 → single 17
66 left, set up 24, so D12 on the next visit
T14
42
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
T20
60
T17
51
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
Same route as under double out
Neighbouring scores
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