1. Confusing singles, doubles and trebles
A dart scores the number of its sector multiplied by the ring it lands in. Both wide areas of the 20 sector score 20; the narrow outer ring scores 40 and the narrow inner ring scores 60. S, D and T stand for single, double and treble. Check where the point has landed before adding up the visit, especially when a dart sits close to a wire.
T20, S5 and S20 total 85, not 45 or 105. From 501, that leaves 416. The outer bull scores 25; the inner bull scores 50. A bounce-out scores zero and is not thrown again. If you need a fuller introduction, the 501 beginner guide follows an entire visit from the board to the remaining score.
2. Subtracting from the wrong remainder
Keep the visit score and the remainder separate. If you start on 416 and score 60, the new remainder is 356. Say “60 scored, 356 left” while learning. Even a correct total can be entered for the wrong player or subtracted from an old score. Check the active name before confirming.
3. Keeping points from a busted visit
In double-out, a bust cancels the whole visit. You bust by going below zero, leaving one, or reaching zero without a double. Starting on 32, S20 leaves 12; S12 then reaches zero on a single, so the visit is a bust and you return to 32. You do not keep the first 20 points. S20 followed by D6 would finish legally.
4. Throwing again after a finish or a bust
On 40, D20 with your first dart ends the leg. On 20, T20 with your first dart busts the visit. In either case, stop throwing. There is no bonus for unused darts and no opportunity to repair a bust with the remaining two. Recording extra throws can turn a correct result into an incorrect history.
5. Entering three darts for every checkout
A finish can use one, two or three darts. If you close 40 with your first dart, record one dart, not three. In DartsRound, an X01 bust counts as zero credited points and a full three-dart visit; a successful checkout uses its actual dart count. This convention matters when comparing three-dart averages with another scoring system.
6. Treating a Cricket visit as an X01 total
In X01, T20 and three S20s both score 60 when no entry or finish rule changes the visit. Cricket needs the actual targets and multipliers because marks close individual numbers. T20 gives three marks on 20; T19 and S3 also total 60 numerically but give three marks on 19 and none for 3. A total alone cannot describe that difference.
7. Correcting a mistake after the next player throws
Agree a simple routine for casual games: throw, read the darts, confirm the score, then retrieve them. If you enter the last visit incorrectly in DartsRound, undo it before anyone continues and enter the correct visit. A competition may have its own correction procedure; agree which rules apply rather than arguing from memory halfway through a leg.
Try a dry run before your next match: 501 minus 85 is 416; 416 minus 60 is 356; 52 minus S20 leaves D16. Then test the busted-32 example above. If everyone can explain both the arithmetic and the finish rule, the scorer becomes a shared record instead of a source of disputes. Practise the starter checkouts when the final subtraction is what slows you down.