117 Checkout in Darts — T20 → 17 → D20
At 117, the leg is decided by the quality of the opening throw more than any other single factor. The route — T20 → 17 → D20 — is built to convert that first dart into a clear path to D20. Players who finish 117 reliably treat the opening triple as the highest-consequence dart in the visit, not the double — because the double becomes straightforward when the approach is controlled, and becomes genuinely hard when it is not.
The preferred miss direction on T20 from 117 is toward 5. Landing there leaves 112 — a position that still carries a realistic path to the close. The 1 side leaves 116 and a harder problem. Players who pay attention to miss geometry on their primary scoring targets consistently produce better outcomes from imperfect darts, which is where most of the marginal gains in competitive 501 are actually found — not in perfect throws, which are the same for everyone, but in where the imperfect ones land.
Players who are reliable at finishing 117 in competition have usually identified and eliminated one specific failure pattern from their game: the tendency to respond to what just happened rather than commit to what comes next. If the first dart misses, the instinct is to adjust — to be more careful, to aim more precisely, to compensate. That instinct is the source of most dropped legs on 117. The route provides the continuation from any reasonable first-dart outcome. Trusting the route rather than overriding it mid-visit is the discipline that converts practice form into match results.
The mental side of finishing 117 is not separate from the technical side. They are the same challenge, solved by the same consistent routine. Tension changes the release point. A tighter grip means the dart leaves the hand later and lands lower. That is the miss that pressure creates, and it is preventable. Slow the approach down, not the throw. Walking to the oche deliberately creates time to settle. The throw itself should be exactly as fast as it always is. The gap between practice performance and match performance on 117 is always a pressure gap. Closing it requires training the pressure response, not just the throw. High-score finishes like 117 are decided on the first dart. The player who commits most cleanly to the opening target almost always takes the leg.
This is the route that wins legs under pressure — strong first dart, elite double, no weak link. When the opponent is threatening, commit to this structure without reservation.
Route Comparison & Target Selection
Primary: T20 → 17 → D20
treble 20 (60), single 17, closing on double 20 — high-percentage close
Alternate: T19 → 20 → D20
treble 19 (57), single 20, closing on double 20 — high-percentage close
The primary (T20 → 17 → D20) and alternate (T19 → 20 → D20) are structurally comparable routes from 117 — similar approaches, similar close quality. The miss geometry on T20 is asymmetric — the 5 side leaves 112 and the 1 side leaves 116, so the preferred drift direction is toward 5. Use the primary as the default. Switch to the alternate when the primary's opening is not grouping correctly on a given visit. The comparable close means the switch does not trade close reliability for a different approach — it exchanges one route for another of equal standing.
The key miss geometry: 5 leaves 112 (workable), 1 leaves 116 (harder). Bias toward 5.
Miss Geometry, Route Structure & When to Use the Alternate
The geometry around treble 20 is the most punishing on the board for missed triples. The 5 and the 1 sit either side of it — neither useful as a recovery segment from 117. A miss left into 5 leaves 112; a miss right into 1 leaves 116. The route opens on treble 20 because the scoring efficiency justifies it when the darts are landing in the bed. When they are not — when grouping drifts low consistently — switching to treble 19 corrects the geometry. The 3 and 7 that flank the 19 score more than the 5 and 1, and more often leave a position from which the leg can still be closed cleanly. That structural upgrade is the reason the switch is taught as a deliberate skill, not a fallback. Making the decision before stepping to the oche, and executing it with full commitment, is the competitive standard. For the structure from here, from 117 the route needs three darts: T20 → 17 → D20. T20 is the scoring dart, 17 is the positioning dart, and D20 is the close. That structure exists because the score does not allow a shorter path. The positioning dart (17) is particularly critical: arriving at D20 in control of the close requires that 17 lands exactly where the route requires, not approximately there. Understanding why each dart appears in the sequence — rather than treating the route as a single action — is part of executing three-dart finishes reliably in competitive play. As for the alternate route, the alternate (T19 → 20 → D20) and the primary (T20 → 17 → D20) are both genuine routes from 117 — they reach the close through different approaches and comparable finishing doubles. The alternate is not a lesser option; it is a different structural line that may suit the throw better on specific visits. Default to the primary and use the alternate when the primary's sequence — particularly the opening dart at T20 — is not landing as the route requires.
When and Why to Use This Route
Use this route as the default from this score — it combines aggressive scoring through T20 with one of the most reliable finishing doubles on the board at D20. There is no match situation where this route is the wrong choice. Whether the opponent is on a finish, comfortably behind, or within range, T20 applies pressure and D20 closes it cleanly.
This route works because it combines two structural strengths without compromise. T20 scores efficiently — it applies real pressure and creates the correct leave for the close — while D20 is one of the most forgiving finishing doubles on the board. Neither component is a weakness. Players who use this route benefit from aggressive scoring on the opening dart and a reliable, high-percentage close. Routes that sacrifice one for the other are weaker than this structure, which sacrifices nothing.
Why Players Miss This Finish
The most common pattern in a missed 117 checkout: T20 lands cleanly, 17 is rushed or slightly off, D20 is either unavailable or approached under recovered tension. The sequence breaks down in the middle, not at the close. Players who are aware of this pattern and deliberately slow their approach to 17 — giving it the same deliberate attention as the opening dart — close 117 significantly more often. The route is three committed throws, not a strong opener followed by two consequences.
The fix is specific: before stepping to the oche on 117, decide the full route, decide the preferred miss direction on T20, and commit to both before throwing the first dart. Players who make these decisions at the line rather than before it are making them while moving — which means they are made reactively rather than deliberately. A decision made before the approach is a decision that holds under pressure. A decision made mid-approach changes the throw.
Practice
Run T20 → 17 → D20 in sets of five attempts and track how many convert cleanly in two visits or fewer. That number is more informative than raw completion rate because it reflects whether the route is working or whether legs are being closed through recovery. A high raw completion rate with low two-visit conversion means the route is closing eventually but not efficiently — the visits are running long, which means first or second dart quality needs work. A low completion rate with decent two-visit conversion means the close is the problem. The metric reveals where to focus practice.
Include recovery reps in every 117 practice session. When T20 drifts into 5, the leave is 112 — practise that score until it feels routine, because it is the most likely leave after an imperfect first dart. When T20 drifts into 1, the leave is 116 — that one deserves practice too, because a leave that has never been practised becomes a source of hesitation in a match. Building familiarity with both miss outcomes means the visit continues automatically rather than stalling after a drift on the opener.
