166 Checkout in Darts — T20 → T18
At 166, the leg is decided by the quality of the opening throw more than any other single factor. The route — T20 → T18 — is built to convert that first dart into a clear path to T18. Players who finish 166 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.
From 166, a miss on T20 has a clear preferred direction: toward 5, which leaves 161. A drift into 1 leaves 165 instead — the worse of the two outcomes by a meaningful margin. This is not something to aim for passively. The pre-throw routine should include a deliberate bias toward the 5 side, expressed in the follow-through direction rather than in any adjustment to the aim line. Consistent application of this principle across a match produces better leaves on misses, which reduces the number of visits needed to close a leg.
What separates consistent finishers on 166 from inconsistent ones is rarely the route they choose. It is the quality of the decision-making that precedes each throw. Taking an extra moment before stepping to the oche to confirm T20 → T18 as the right route, confirm T20 as the right first target, and confirm full commitment to the execution removes the reactive thinking that pressure introduces. The throw itself is already there — what gets disrupted under match conditions is the clarity of intent before the throw begins.
On 166, the only difference between practice and match play is the number of thoughts between stepping to the oche and releasing the dart. Fewer thoughts means a better result. Most missed checkouts under pressure come from tension in the arm rather than poor aim — the line is correct but the tempo changes and the dart goes offline. Let the dart go naturally and do not force the release. A forced release almost always lands outside the intended area on 166. Consistent finishing in darts depends on mental control as much as technique — and mental control, like technique, is trainable through structured practice. On 166, the pressure is visible — the opponent knows a finish is on. The players who close it ignore that fact and focus entirely on the process.
If urgency is real, the triple start on 166 is the right call. T20 scores hard and keeps pressure on the opponent. Back it fully.
Route Comparison & Target Selection
Primary: T20 → T18
treble 20 (60), closing on treble 18 (54)
The anti-target on T20 is 1. A miss there leaves 165 — the preferred miss is into 5 for 161.
Miss Geometry, Route Structure & When to Use the Alternate
From 166, the first dart targets treble 20 — but the neighbour geometry here matters as much as the target itself. The 5 sits to the left and the 1 to the right, making this the most unforgiving triple on the board for errant darts. A miss into 5 from 166 produces 161 remaining; into 1 it produces 165. The preferred drift direction — toward 5 — leaves the more workable 161, but even that requires a recovery route that starts the close later than hitting the treble would. When grouping drifts below the bed consistently, treble 19 corrects both the mechanical and geometric problem simultaneously: its 3 and 7 neighbours are higher-value, the miss cost is lower, and the route into a close from the resulting leaves is more often clean. As for the structure of the route, from 166 the finish runs two darts: T20 → T18. T20 creates the exact leave for T18 with no intermediate setup required. Two-dart routes are the most efficient finish structure in 501 — they offer no margin for absorbing a poor first dart but also ask for nothing beyond precision on two consecutive throws. The execution demand is concentrated entirely on T20: land it correctly and the close on T18 is a single committed throw away. The risk of two-dart routes is not complexity but consequence — a missed first dart in a two-dart sequence leaves the close further away and the recovery position immediately visible to both players.
When and Why to Use This Route
Use this route confidently from this score. The combination of T20 for scoring and T18 for the close is the best available structure here. T18 responds well to a committed throw after a controlled approach — give the setup dart the same deliberate attention as the final dart, and the close becomes a real proposition in any match situation.
The route works because it is the most practical option from this score. T20 and T18 work together to create the best available finish structure. Commit to both darts and the route delivers the strongest result this score can produce.
Why Players Miss This Finish
The miss on 166 is almost always on the opening dart, not the close. A drift on T20 into 5 leaves 161 — a position that requires recalculating the route under time pressure. Players who do not practise their recovery from that leave find themselves improvising at a moment when improvisation is most expensive. Knowing the best continuation from both miss positions before starting the visit removes the cognitive load that creates the miss on the recovery dart.
The fix is specific: before stepping to the oche on 166, 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
The simplest effective practice format for 166 is a completion drill: attempt T20 → T18 repeatedly, require three consecutive successful completions before finishing the exercise, and restart the count every time a dart misses. This format produces more useful practice than fifty relaxed attempts because the final dart in each set carries real consequence. That consequence is what trains the composure that match finishes require — not just the accuracy.
Include recovery reps in every 166 practice session. When T20 drifts into 5, the leave is 161 — 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 165 — 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.
