144 checkout
In short
144 checks out in three darts under double out: T20, T20, D12, for 60 + 60 + 24. If the treble 20 lands in the single 20, 124 is left, out of reach with two darts left: T20, T16 leave 16, so D8 on the next visit. Should the second dart, at the treble 20, drop into the single 20, 64 is left, out of reach with the last dart: T16 leaves 16, so D8 on the next visit. With only two darts in hand, T20, T20 leave 24, so D12.
T20
60
T20
60
D12
24
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
124 left, set up 16, so D8 on the next visit
T20
60
T16
48
treble 20 → single 20
64 left, set up 16, so D8 on the next visit
T16
48
double 12 → single 12
12 left, on the next visit
D6
12
With fewer darts in hand
The finish is then out of reach: these darts set up the next visit.
Two darts
leaves 24, so D12
T20
60
T20
60
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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In a game, the scoreboard shows the route every visit, following the checkout rule you chose.
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