Checkout ladder #244 climbs from 2 to 111 in five steps — 2, 46, 79, 96 and 111 — with three darts per finish and a double to end on.
2 is a straight double: D1. A miss into the single leaves an odd number, so the next dart has to set up a double before you can finish. 46 is a two-dart finish: 6 D20.
79 is a two-dart finish: T13 D20. 96 is a two-dart finish: T20 D18. 111 needs all three darts: T17 20 D20. If the first dart misses its treble, the board will show the new route straight away.
At best the five finishes need 10 darts out of 15. Your result counts the finishes you make first and the darts you used second. The middle finishes decide this ladder. Choose the route that leaves a double after a missed treble; the suggested routes do that wherever they can.