123 checkout
123 checks out in three darts under double out: T20, T13, D12, for 60 + 39 + 24. If the treble 20 lands in the single 20, 103 is left, out of reach with two darts left: T20, S11 leave 32, so D16 on the next visit. Should the second dart, at the treble 13, drop into the single 13, 50 is left and still on: BULL. With only two darts in hand, T20, T13 leave 24, so D12. Under straight out, where any segment can finish: T20, T18, S9.
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.
With fewer darts in hand
The finish is then out of reach: these darts set up the next visit.
Under the other checkout rules
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