Darts strategy looks trivial from the outside — aim at the treble 20, then hit a double — and is anything but. The board is arranged so that missing the 20 costs you far more than missing almost anything else, the checkout table branches into hundreds of routes with different risk profiles, and the arithmetic of what you leave yourself is as consequential as what you score. A player who averages 100 and checks out at 35 per cent will beat a player who averages 103 and checks out at 25 per cent almost every time.
The four diagrams below map the board as professionals read it: the two main scoring beds and the price of missing each, the routes out of 170 and the great three-dart finishes, the doubles ladder that explains why 32 is prized above 40, and the punishment geometry that makes the numbering sequence the sport's real defence. The concepts that follow are the working vocabulary — three-dart average, checkout percentage, setup darts, bogey numbers, break of throw, grouping and dartitis.
Tactics board
The scoring beds: treble 20 against treble 19
Checking out 170 and the great finishes
The doubles ladder: why 32 beats 40
Punishment geometry: where misses go
Key concepts
The three-dart average
The sport's headline statistic: total points scored divided by darts thrown, multiplied by three. It measures scoring power and nothing else, but it is the cleanest comparison the game has. A pub league player might average in the 50s, a county player in the 70s, and a PDC Tour Card holder needs the mid-90s to survive. Anything above 100 in a televised match is a strong performance, above 105 is exceptional, and the all-time televised record is Michael van Gerwen's 123.40 against Michael Smith in the 2016 Premier League. The average is calculated on the whole match including checkout darts, which is why long finishes and missed doubles drag it down: a player who leaves 32 four times before hitting it will see an average fall by several points even though the scoring was faultless.
Checkout percentage
Doubles attempted against doubles hit, and the statistic that decides more matches than scoring does. Elite checkout percentages sit between 35 and 45 per cent across a televised match, which means the best finishers in the world miss most of their attempts. Because a player only gets darts at a double if they have scored their way there, the two statistics interact: a heavy scorer arrives at a finish sooner and gets more attempts, so a modest checkout rate can still win. The reverse also holds, and the sport's folklore is full of players who out-averaged an opponent by ten points and lost. Coaches treat doubling as a separate discipline with its own practice routines, most commonly around the board from double 1 to double 20 without a miss allowed.
The setup dart
When a player cannot check out with the darts remaining, the objective changes from scoring to arranging. From 130 with two darts left, a professional takes treble 20 to leave 70, not because 70 is small but because it splits into 18 and double 26 or 20 and double 25. From a leave of 66 the standard route is 16 then double 25, or 10 then double 28. The principle is to reach a number that leaves a preferred double, ideally 32 or 40, on the following visit. The most-cited example is 81: taking treble 15 leaves 36, or double 18, whereas the greedy treble 19 leaves 24 and a fiddly double 12. Good setup play is invisible to casual viewers and is the clearest separator between a county player and a professional.
Bogey numbers
Seven scores between 159 and 170 cannot be checked out with three darts under any combination: 169, 168, 166, 165, 163, 162 and 159. There is no route because the maximum single dart is 60 and the maximum finishing dart is 50, so a three-dart out requires two darts totalling at least the leave minus 50, and those seven fall through the gaps. Professionals never willingly leave them, which shapes decisions much earlier in a leg — a player on 229 will choose a scoring dart that avoids stepping into 168 or 166 on the next visit. The term also covers awkward leaves like 99, 103 and 107, which are technically checkable but require an unlikely combination and are avoided when a cleaner route exists.
The break of throw
The player who throws first in a leg has the advantage of arriving at a finish one visit earlier, and at professional standard a leg on your own throw should be won. Matches therefore hinge on breaks, exactly as in tennis. A player who wins a leg against the throw takes a lead that the opponent must then reverse by breaking back, and in a race to six that single leg is usually the match. This is why the bull-up matters, why players speak of the pressure of throwing second at the start of a set, and why deciding-leg formats vary between events. Some tournaments give the throw to the player who was broken; the World Championship's deciding legs are preceded by a fresh bull-up, so the advantage is re-competed rather than awarded.
Grouping, rhythm and tempo
A dart already in the treble bed occupies space, so professionals cultivate a grouping tight enough to be accurate but angled to avoid deflecting the following dart — hence the fashion for slimmer barrels and shorter stems that let three darts sit side by side. Tempo is intensely personal and largely unteachable. Michael van Gerwen throws quickly and rarely reconsiders; Peter Wright is deliberate and adjusts constantly; Phil Taylor's rhythm was metronomic to the point that opponents described it as intimidating in itself. Because there is no defence in darts, tempo is one of the few tools available for affecting an opponent, and pace-of-play rules exist precisely to stop players weaponising delay. Sports psychologists working in the sport concentrate less on aiming than on protecting rhythm under crowd noise.
Scoring routes and the 12-dart leg
A leg of 501 is a race measured in darts, and the benchmarks are exact. Twelve darts is the standard for elite scoring: 180, 180, 141 is nine, but the realistic strong leg is three visits of around 140 followed by a checkout. Fifteen darts is a solid professional leg, eighteen is average, and anything above twenty-one on your own throw is a leg you expect to lose. Because the checkout has to be reachable, players work backwards: 501 minus two maximum visits leaves 141, minus three visits of 140 leaves 81. The whole architecture of scoring is therefore aimed at arriving on a two-dart finish rather than simply scoring the most points, which is why a visit of 134 can be more useful than one of 140 if it leaves the better number.
Dartitis
The sport's version of the yips: a psychological block that prevents a player from releasing the dart, producing a frozen hand at the point of throw. It has ended or badly damaged major careers. Eric Bristow developed it in the mid-1980s at the height of his dominance and never fully recovered, winning no world title after 1986. Berry van Peer's visible struggle at the 2017 Grand Slam of Darts brought the condition to a new audience and drew unusually sympathetic treatment from a crowd normally happy to jeer. There is no agreed cure; players have tried changing grip, weight, hand and pre-throw routine, and some recover fully while others never throw competitively again. It is the clearest evidence that darts is a motor-control sport played under psychological load rather than a game of pure aim.
Equipment as a variable
Within the 50-gram and 300-millimetre limits, almost everything is adjustable, and professionals tinker constantly. Barrel weight has trended downward over three decades, from the 26 to 30 gram darts common in the 1980s to the 21 to 24 grams typical today, which flatten the flight path and demand a firmer throw. Grip patterns, knurling, front-loaded or rear-loaded balance, stem length and flight shape all alter how the dart travels and how it sits in the board. A larger flight slows the dart and lifts the tail; a slim flight makes for a flatter, faster trajectory and tighter grouping. Points are sharpened or dulled to influence bounce-outs. None of this creates ability, but the search for a setup that feels invisible in the hand is a permanent feature of professional life.
How it evolved
For most of the sport's history the tactical orthodoxy was simple and rarely questioned: score on the treble 20, finish on double 16 or double 20, and play safe with the setup. What changed in the PDC era was the raw standard. When scoring 100 per visit became routine rather than exceptional, the game's decisive skill migrated to the checkout, and the professional's mental library expanded from a handful of memorised finishes to the entire table from 170 downwards, with preferred and alternative routes for every number. The rise of televised statistics accelerated this: once averages, checkout percentages and darts-per-leg were displayed to millions, players began optimising for them.
The current direction of travel is toward faster, higher-variance darts. Younger professionals raised on online and soft-tip practice throw quicker, commit to the 20s more aggressively and appear less troubled by pressure doubles than the generation before them, which is a large part of why the average age of a major finalist has fallen sharply since 2020. The counter-trend is the sport's growing seriousness away from the oche — structured practice regimes, sports psychology, and in some cases fitness and diet programmes that would have been laughed out of a 1980s dressing room. The board has not changed since 1913. Everything else about how it is attacked has.
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