51 checkout
In short
51 checks out in two darts under double out: S19, D16, for 19 + 32. If the double 16 lands in the single 16, 16 is left and still on: D8. And if the double 8 drops into the single 8 as well, 8 is left for the next visit: D4. With a single dart in hand, S19 leaves 32, so D16. Under straight out, where any segment can finish: T17. Under master out, where a treble can finish: T17.
S19
19
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.
double 16 → single 16
16 left, with the last dart
D8
16
With fewer darts in hand
The finish is then out of reach: these darts set up the next visit.
One dart
leaves 32, so D16
S19
19
Under the other checkout rules
Master out
finish on a double or a treble
T17
51
Straight out
any segment can finish
T17
51
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