147 checkout
In short
147 checks out in three darts under double out: T20, T17, D18, for 60 + 51 + 36. If the treble 20 lands in the single 20, 127 is left, out of reach with two darts left: T20, T17 leave 16, so D8 on the next visit. Should the second dart, at the treble 17, drop into the single 17, 70 is left, out of reach with the last dart: T10 leaves 40, so D20 on the next visit. With only two darts in hand, T20, T17 leave 36, so D18.
T20
60
T17
51
D18
36
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
127 left, set up 16, so D8 on the next visit
T20
60
T17
51
treble 17 → single 17
70 left, set up 40, so D20 on the next visit
T10
30
double 18 → single 18
18 left, on the next visit
D9
18
With fewer darts in hand
The finish is then out of reach: these darts set up the next visit.
Two darts
leaves 36, so D18
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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In a game, the scoreboard shows the route every visit, following the checkout rule you chose.
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