When a 501 Visit Does Not Count—and Where Your Score Resets
In double-out 501, overscoring, leaving 1 or reaching zero without a double ends the visit; the whole visit is erased and the starting score returns.
In standard double-out 501, you bust if a dart takes your score below zero, leaves exactly 1, or reaches zero without landing in a double. The visit ends immediately, every dart from that visit is disregarded, and your score returns to what it was before the first dart of the visit—not what it was immediately before the mistake. That rollback is set out in the PDC Europe rules for 501 and busts.
The bust rule in 30 seconds
A visit is your opportunity to throw up to three darts. In standard double-out 501, the visit is a bust when:
- Your remaining score falls below zero.
- Your remaining score becomes exactly 1.
- You reach zero without the final dart hitting a double.
As soon as any of these happens, the visit is over. You cannot throw any unused darts, and none of the darts already thrown during that visit changes your score.
Zero alone is not enough to win a double-out leg. The final dart must hit a numbered double or the 50-point inner bull, which functions as double 25. The 25-point outer bull is not a double.
Scoring and checkout rules do prompt questions among newer players, as illustrated by this beginner community discussion about confusing parts of darts. That thread is anecdotal rather than evidence of how widespread the confusion is, but it highlights the importance of naming the format: these are double-out rules, not universal rules for every version of 301, 501, or another 01 game.
Darts bust score examples: quick-reference table
The first five scenarios show the three bust conditions and what happens when the mistake occurs at different points in a visit. S means single and T means triple.
| Scenario and starting score | Dart sequence and running remainder | Outcome and reason | Next-visit score |
|---|---|---|---|
| 1. Start on 32 | S20 leaves 12; S15 produces −3 | Bust: score falls below zero | 32 |
| 2. Start on 32 | S8 leaves 24; S3 leaves 21; S20 leaves 1 | Bust: exactly 1 remains | 32 |
| 3. Start on 10 | S10 reaches 0 | Bust: zero reached on a single | 10 |
| 4. Start on 32 | S16 leaves 16; T8 produces −8 | Bust: later dart overscores, so both darts are erased | 32 |
| 5. Start on 12 | Inner bull scores 50 and produces −38 | Bust on dart one: score falls below zero | 12 |
These are direct arithmetic applications of the double-out bust rule. The 32 → S20 → S15 overscore and the return to the visit’s starting score are also given as a worked example in this 501 rules and checkout guide.
The fifth scenario shows that the inner bull is not automatically a checkout. From 50, it is a legal finish because it counts as double 25. From 12, the same 50-point hit overscores, ends the visit immediately, and returns the player to 12.
Why the whole visit is erased after a bust
Only undoing the final dart is incorrect. A bust voids the scoring effect of the entire visit, including any valid points scored by earlier darts.
Consider the fourth scenario as a timeline:
32 at the start → S16 leaves 16 → T8 would leave −8 → reset to 32
The next visit begins from 32, not 16. The single 16 temporarily changed the running remainder, but it belongs to the same visit as the busting triple 8.
It helps to separate the physical sequence from the recorded score:
- Two darts were physically released.
- The first dart landed in single 16.
- The second dart caused the bust.
- Neither dart reduces the score carried into the next visit.
- The unused third dart cannot be thrown.
- Play passes to the opponent or next player.
The same rollback applies when a bust occurs on the third dart. All three darts were physically thrown, but that visit contributes nothing to the player’s remaining-score calculation.
This is why the scorekeeper must retain the value held at the start of each visit. The pre-visit score is the rollback point; the temporary remainder shown after dart one or dart two is not.
Bust or checkout? Valid finishes from common scores
A legal checkout reaches exactly zero with the final dart in a double. The next three numbered scenarios contrast valid finishes with plausible busts.
| Scenario | Starting score | Legal checkout | Bust contrast |
|---|---|---|---|
| 6 | 32 | D16 | S16, S16 reaches zero on a single |
| 7 | 40 | D20 | S20, S20 reaches zero on a single |
| 8 | 50 | Inner bull | T20 scores 60 and overscores by 10 |
These standard finishes—32 through double 16, 40 through double 20, and 50 through the inner bull—follow double-out scoring. Double 1 is also a legal checkout from 2 and, because it scores 2, is the lowest possible double-out finish.
The bust contrast in scenario 6 is important. The first S16 is a legal setup dart because it leaves 16, but the second S16 does not win the leg. It reaches zero on a single, so the entire visit busts and the score returns to 32.
Leaving 1 also causes an immediate bust. No single dart can remove exactly 1 while finishing on a double: a single 1 would reach zero without satisfying the double-out requirement, while the smallest numbered double—D1—scores 2.
Near a finish, therefore, check both the arithmetic and the required final segment. A route fails if it:
- takes the score below zero;
- leaves exactly 1; or
- reaches zero on a single or triple rather than a double.
Double-out versus straight-out bust rules
Some guides appear to describe a different bust rule because they are explaining straight-out play rather than double-out 501.
| Situation | Double-out | Straight-out |
|---|---|---|
| Score falls below zero | Bust | Bust |
| Score finishes on 1 | Bust | Remains playable |
| Zero reached with a single | Bust | Legal finish |
| Zero reached with a double | Legal finish | Legal finish |
A remaining score of 10 provides the clearest contrast:
- In double-out, S10 reaches zero without a double. The visit busts, and the player returns to 10.
- In straight-out, S10 reaches exactly zero and wins.
Straight-out generally permits a single, double, or triple to take the score to exactly zero, while an overscore remains a bust. For example, the DARTSLIVE guide to 01 games allows a player on 12 to finish with single 12, double 6, or triple 4 and treats a score below zero as a bust.
Local leagues, pub games, competitions, and electronic-board settings can use different finishing modes. Confirm whether the selected game is double-out, straight-out, or another variant before applying any checkout or bust example.
A simple way to avoid common busts
Before throwing at a low remaining score, check two things:
- The number left.
- The required finishing mode.
Do not assume that reaching zero with any segment will win. In double-out, the final dart has to land in a numbered double or the inner bull.
It also helps to recognize a small group of legal finishes:
- 32 → D16
- 40 → D20
- 50 → inner bull
- 2 → D1
If the available checkout is uncomfortable, choose a setup shot intended to leave a familiar double rather than aiming at a segment that can overscore. This is practical route-planning, not a guarantee that a player will win more legs or avoid every bust.
Accurate scorekeeping matters as much as route selection. Record the score held at the beginning of each visit so that a bust can be restored correctly. When reviewing performance, keep scoring, checkout attempts, successful doubles, and busted visits conceptually separate: they describe different parts of the leg.
Does a bust cancel all three darts in the visit?
A bust cancels the scoring effect of the entire visit. Every dart already thrown in that visit is disregarded, and the score returns to its pre-visit value.
If the bust happens on dart one or dart two, the unused darts are not physically thrown because the visit has already ended. Saying that the “whole visit is cancelled” refers to its scoring effect; it does not mean three darts were necessarily released.
Is the bullseye a double in 501 darts?
The 50-point inner bull can serve as double 25 in double-out 501, so it is a legal checkout from 50. The 25-point outer bull is not a double.
The inner bull can still cause a bust when it scores more than the player needs. With 12 remaining, for example, a 50-point inner bull takes the score below zero, ends the visit, and restores the score to 12.
Is a bust the same as a bogey number?
No. A bust is an event within a visit: the player overscores, leaves 1, or reaches zero without a valid double under double-out rules. It immediately ends the visit and restores the starting score.
Does a first-dart bust count as one dart or three in match statistics?
There is no universal recording convention across every league, jurisdiction, app, or statistical purpose. Physically, only one dart was released if the player busted with dart one. A scoring system may treat darts counted for a leg average separately from physical darts released or attempts at a double.
An informal discussion among scoring-app users reports systems that record a first-dart bust as a three-dart visit while recording only the double attempt actually made. That discussion does not establish an official universal standard, so use the convention specified by the relevant league, competition, or software.
The usable rule at the board is straightforward: identify the format, remember the three double-out bust triggers, and restore the score held before the first dart of the visit. From 32, D16 wins; taking the score below zero, leaving 1, or reaching zero without a double sends the score back to 32.