Throw one dart at each of the current targets.
For example, first targets are: Treble 20, Treble 20 and Treble 20.
One dart for each target and you only score on target section number. Let's say you hit:
Treble 20 - Single 20 - Treble 5.
Enter the score: 80 since you only score on section 20.
Standard targets are 5 throws (5 x 3 darts):
T20 - T20 - T20
T20 - T20 - T19
T20 - T20 - T18
T20 - T20 - T17
T20 - T20 - Bullseye
What will be your top score?