170 checkout
In short
170 checks out in three darts under double out: T20, T20, BULL, for 60 + 60 + 50. If the treble 20 lands in the single 20, 150 is left, out of reach with two darts left: T20, T18 leave 36, so D18 on the next visit. Should the second dart, at the treble 20, drop into the single 20, 90 is left, out of reach with the last dart: T18 leaves 36, so D18 on the next visit. With only two darts in hand, T20, T20 leave 50, so BULL.
T20
60
T20
60
BULL
50
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
150 left, set up 36, so D18 on the next visit
T20
60
T18
54
treble 20 → single 20
90 left, set up 36, so D18 on the next visit
T18
54
bull → outer bull
25 left, on the next visit
S9
9
D8
16
With fewer darts in hand
The finish is then out of reach: these darts set up the next visit.
Two darts
leaves 50, so BULL
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
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