Inside the Poomsae Scoresheet: Pre-Declared Difficulty and Vietnam's Technical Gap

Incheon, a late-April afternoon. I was sitting in the sixth row, just behind the judging panel, close enough to see the tablet screens light up after every routine. A female athlete walked to the centre of the mat, bowed to the panel, took a long breath and began Koryo. Three minutes. No shouts, no impact, not a drop of blood. Only steady breathing and the sound of heels dragging on the mat.

When the scoreboard appeared, I wrote it into my notebook: 3.60 in accuracy out of 4.00, and 5.58 in presentation out of 6.00. A total of 9.18. The athlete who followed her scored 3.52 and 5.82. A total of 9.34. The competitor with the higher accuracy score lost. That detail kept me in the arena for another four hours, and three days later I was still rewinding the footage.

CONTEXT

Poomsae is the forms division of taekwondo, the opposite of sparring. There is no opponent on the mat, no scoring blow, no referee pressing a button after contact. There is one athlete or one team, a form prescribed by the rulebook, and a judging panel of three or seven depending on the level of the event. At major events the panel is larger, and the highest and lowest scores are discarded before averaging.

The score has two parts. Accuracy covers the technical foundation: stances, hand positions, joint angles, balance, the rhythm of each movement in the form. Presentation covers speed, power, tempo, the tension of each movement and, in team events, synchronisation between members. Beyond the recognised forms, the system also includes freestyle poomsae, in which athletes choreograph their own routine to music and may use acrobatic and aerial spinning techniques.

Poomsae entered the SEA Games programme in 2026 and has featured at almost every regional Games since. For Vietnam it has been a far more reliable source of medals than sparring, where countries with deeper physical conditioning and training systems tend to dominate. The Vietnamese poomsae team, built around long-serving names such as Chau Tuyet Van, Nguyen Thi Le Kim, Lien Thi Tuyet Mai and Nguyen Thien Phung, has held a leading position in Southeast Asia for close to a decade.

But the world stage is a different story. And the reason is not that Vietnamese athletes train less.

THE ANALYSIS

I spent three days rewatching every poomsae routine from the three most recent international events featuring the Vietnamese team: a world championship, a SEA Games and a continental open. Forty-two routines in total, in individual and team divisions. I recorded each pair of scores — accuracy and presentation — rather than just the total, because a total erases all information about where the gap comes from.

The results show a repeating pattern. In accuracy, Vietnamese athletes tend to sit in the highest group; in presentation, they sit in the middle. The spread between those two components is wider for the Vietnamese athletes than for the Korean, Iranian and Filipino athletes in the same dataset.

Numbers do not lie; they simply wait to be read correctly.

There is a technical reason for that pattern. Accuracy is a closed component: it is defined by the rulebook, and the only way to raise the score is to repeat the correct movement thousands of times. That is the kind of skill a martial arts culture with high training discipline, long hours and low turnover will do well. Vietnam's strength here is not luck.

Presentation is different. It rewards amplitude, explosiveness, the expansion of a movement and presence in front of a crowd — qualities that depend on an explosive physical base built from childhood. A kick a few degrees higher, a sharper hip rotation, a crisper stopping point all carry scoring value. When the competition calendar is dense, presentation is the first component to erode.

That is why another detail in the footage caught my attention: at roughly 60 to 75 percent into a routine, when the form enters its final section and the breathing has grown heavy, the movement amplitude of many Vietnamese athletes visibly contracts — narrower stances, lower hand extensions, shorter stops. At exactly that point, the Korean athletes in the same dataset held their amplitude almost linearly from start to finish.

Frequency is what spectators overlook but coaches do not. Across the 42 routines, I counted 11 cases of clearly reduced amplitude in the closing section. Nine of them belonged to teams with a lower volume of explosive conditioning work. This is the verified layer: it comes from publicly available footage, and anyone with the source files can count it again.

The speculative layer is the explanation. The contraction could come from fatigue, from training habits, or from athletes being instructed to play safe so as not to lose technical points. I do not yet have enough data to separate those three possibilities. What I can state is that the pattern appears often enough that coincidence is not a serious explanation.

FREESTYLE AND THE DECLARED DIFFICULTY SHEET

In recognised-form divisions, the gap between teams is usually decided in presentation and moves within a few tenths of a point. In freestyle, the gap can be far wider, and most of the reason sits off the mat.

Under the current freestyle rulebook, each athlete or team must submit a technical declaration sheet to the organisers in advance. Every technique on the sheet is assigned a fixed point value according to its difficulty group, and the total value of the sheet may not exceed a defined ceiling. On the mat, the athlete performs exactly the declared sequence. Complete it fully and they receive the full value. Miss one technique and they lose that value plus a deduction.

In other words, a substantial share of the score is settled before a judge touches a tablet. It is a technical document, not a subjective judgement.

This is where the problem becomes uncomfortable. The largest gap between Vietnamese martial arts and the leading group in freestyle is rarely in the judging, but in the number and difficulty group of the techniques declared on the pre-submitted sheet. A team that declares five high-group techniques and completes them holds a points reserve that a team declaring three cannot offset with any level of performance.

The reason is concrete. High-group techniques require an acrobatic and aerial-rotation base — a skill built in adolescence and impossible to add within a short training cycle. When a martial arts system recruits from traditional forms classes and prioritises precision, it gains a very strong resource in the technical scoring and carries a very hard-to-fill gap in the acrobatic layer.

In the dataset I recorded, Vietnamese teams in freestyle declared roughly a third fewer techniques on average than the leading group. Completion rates were not far apart. The issue is not that they cannot do it, but that they declare less.

TEAM EVENTS: A STRENGTH WITH CONDITIONS

In team divisions, synchronisation is scored as a separate component. Three athletes must enter the routine together, holding the same tempo, the same amplitude, the same stopping points. This is where Vietnam's training discipline converts most clearly into points, and it is also where Southeast Asian teams most often beat stronger programmes.

But the synchronisation criterion has a reverse side. When scoring is anchored to the weakest member of a group, one weaker individual drags the whole team down, and the safest option is for all three to lower amplitude to a common level. A highly uniform line-up can therefore become a line-up with a capped ceiling, if the coaching staff chooses the safe option over the maximising one.

Among the team routines I watched, the Vietnamese groups kept amplitude deviation between their three members very low — lower than the leading group. In exchange, the absolute amplitude of the whole group was also lower. This is a deliberate trade-off, and it delivers at regional level while costing at world level.

One point needs separating out. At SEA Games level, the gap between teams in a single routine is narrower, so scoring variance carries relatively more weight. At world level, the gap in declared difficulty value widens, and scoring variance becomes less decisive. The same line-up can win regionally and lose globally without any change in ability.

THE CONTRARIAN ANGLE

After every defeat for Vietnam in an international poomsae final, a familiar line of commentary resurfaces: the judges were biased. I understand the reflex. Presentation does contain a subjective element, and in some cases inter-judge variance is real and measurable.

But when the two score columns are separated and set against the technical declaration sheet, most of the defeats I recorded were not decided by judge variance. That variance is usually a few tenths of a point. The gap in declared difficulty value is larger, and it is established before the athlete bows to the panel.

The blind spot is that we watch the performance, while the decision sits in a document filed with the organisers days earlier. Nobody films a declaration sheet. No stand applauds an entry in a difficulty catalogue.

I choose to trust the footage, because footage has no emotions. But footage also only records what happens on the mat. That is the limit of this profession, and it is why I have started asking to see the pre-submitted files at events that publish them.

A note on method: the pattern I describe rests on 42 routines, a sample large enough to raise a question but not large enough to conclude anything about an entire development system. I do not use it to speak about an individual athlete, and certainly not about a single match.

TAKEAWAY

Three days of rewatching, and then one detail reveals itself. The signal I will be watching at the next event is not any individual's score, but the freestyle team's declaration sheet: how many high-group techniques, what completion rate, and how many adolescents in the youth programme are being trained in an acrobatic base.

When the stands are empty, the mat begins to tell the real story. And that story is written before the music starts.