Vietnamese Billiards Across Three Data Layers: Carom, Pool and the Squad-Depth Question

At 2:15 in the morning, inside a billiards club on Pham Ngu Lao Street, I closed my tracking notebook and read the last line again: 19 out of 31. Over four hours, a young Vietnamese player had left an open table after 19 of his 31 breaks. But only six of those 19 open tables turned into a run-out. A rate of 31.6 percent.

At the next table, a man in his thirties who had played in an international pool event staged in Hanoi had a far lower break rate: 14 out of 28. That night he won 11 of his 14 matches. Read the break column, and the young player looks stronger. Read the results column, and the older man is far ahead.

The gap between those two columns is what this piece is about. After years of tracking Vietnamese billiards with a paper notebook and a spreadsheet, I have learned that the hard part is not measurement. The hard part is knowing which layer you are measuring.

People see the finishing shot. I see the twenty quiet minutes that led to it. And in Vietnamese billiards, those twenty minutes have almost never been recorded.

Context: three streams of billiards, one largely empty data system

Billiards in Vietnam is not one sport. It is three sports layered onto the same cultural space.

The first stream is three-cushion carom. This is the densest layer and the one where Vietnam has the clearest international voice. Clubs in Ho Chi Minh City, Binh Duong, Dong Nai and Hanoi sustain an enormous amateur base, and from that base emerges a small professional group that domestic fans follow shot by shot: the generation of Tran Quyet Chien, Nguyen Quoc Nguyen and Duong Quoc Hoang, plus younger names such as Bao Phuong Vinh. The group is not large, but its quality density is high.

The second stream is pool, mainly 9-ball and 10-ball under international competition systems. This is the fastest-growing stream in terms of young players, amateur tournaments and online attention. International events staged in Hanoi in recent seasons have exposed a large Vietnamese audience directly to professional standards: shot clocks, referee procedures, table setup and lighting control, and most importantly the way match data is captured shot by shot.

The third stream is snooker. Small in elite participation, but durable in club culture, especially in the major cities. Snooker in Vietnam has almost no short-term international pathway, given travel costs and the qualifying system in the United Kingdom. It still serves as a training ground for safety thinking and cue-ball thinking.

These three streams run on three different governance systems. Carom follows the international carom federation, with event-based and average-based scoring. Pool follows international pool bodies and professional promoters, with a tour-based ranking logic. Snooker follows the British professional snooker association, with a qualifying and tour-card system.

This means a Vietnamese fan who wants a full picture of a player must read three systems, three points logics and three definitions of the word form.

Meanwhile, at the domestic level, what exists is results. There is no system recording turn by turn, safety by safety, or positional error by positional error at amateur and semi-professional events. A match can last three hours, and the only thing left afterwards is the final score. This is the single biggest bottleneck in Vietnamese billiards, and it is not a bottleneck of talent.

Layer one: dissecting the shot and the structure of a turn

Any serious conversation about billiards data has to start with the smallest unit. In pool, that unit is the shot. In carom, it is the turn.

A turn in carom has structure. It opens with a position, usually neutral or unfavorable. It develops through the first scoring shot, then through a scoring chain that depends on cue-ball quality. And it ends, either with a miss or with a deliberate move into a defensive position.

Three metrics are readable from that structure: average points per turn, finishing rate in the middle phase, and the share of turns cut short by a positional error. The third is the most important and the least discussed. A player may score three points per turn, but if a third of his turns end because the cue ball is half a meter out of place, that average is hiding a systemic fault.

In pool, the break is usually judged by feel, strong or weak. The better reading splits it into three variables: whether the cue ball is controlled within a safe zone, whether the one ball is pocketed, and how many balls are pushed into dead positions. In the four hours I tracked on Pham Ngu Lao, the young player's 19 breaks all scored well on the first two variables. But 11 of them left two or more dead balls. He broke well in terms of sound. He broke poorly in terms of table structure.

The metric that says the most about a player is not the number of points he scores, but the rate at which he converts a neutral position into an advantageous one. That is the core skill of this sport across all three streams. It is also the hardest skill to coach, because it depends more on reading the table than on the arm.

The other half of the picture is safety play. Fans remember scoring runs. Analysts remember the safeties that created them. In the ledger of 1,900 matches I have built over three seasons, players inside the top 20 for pot success but outside the top 40 for safety success consistently win about ten percentage points less than the group with the opposite profile. Same scoring skill, different outcome in the part nobody watches.

I should be clear about the reliability of that ledger. I record by hand, by direct observation, with no angle sensors and no multi-camera setup. My error margin is roughly plus or minus two percent on basic metrics. Enough to show a trend. Not enough to judge a single shot. Before trusting a number, I ask where it came from. The same way I watch a player before judging him.

Layer two: player data and the form curve

At this layer, the central question is not who is best. It is who stays best, and for how long.

In carom, the form curve peaks late. Elite players typically peak between thirty and thirty-eight, because the discipline rewards table reading and the ability to hold a stable stroke rhythm under prolonged pressure. In pool, the peak comes earlier, commonly between twenty-four and thirty-two, because the discipline rewards fast decision-making and confidence on the break. Snooker sits in between, with a peak usually between twenty-five and thirty-five.

The current Vietnamese carom group sits squarely in the peak band. That is good news in the short term and a problem in the medium term. When a group peaks at the same time, it creates a very clear window of results, but that window closes almost simultaneously. The depth question is therefore not academic.

In my data, the gap between Vietnam's leading carom group and the next group is not in the ability to win one match. It is in the ability to win six or seven matches in a row across a multi-day event. In a single match, the gap almost disappears. In a tournament, the gap is multiplied by accumulated fatigue.

Consistency is not an addition of talent. It is a multiplication. A player with a mature technical base, but with a mismatched daily and competitive rhythm, will gradually lose his edge round by round. This is why a week-long international event is a fundamentally different test from a two-day domestic event.

In pool, the story is different. The number of young players is rising fast, but the international sample for this group is still thin. A few good results at home events are not enough to draw a curve. I once sat with three club coaches and heard the same assessment: Vietnamese young players pot very well, but lose the racks where the table does not allow attack. That observation matches the data: their safety rate sits clearly below that of international professionals.

There is another kind of divergence between data and reputation. Each season, a few players rise on the back of one televised match clipped into short videos. My ledger usually shows those matches were played at an individual peak, outside the player's own average band. This does not diminish the match. It only reminds us that a data point is not a data line.

Layer three: tournament systems and formats

Format decides which kind of player gets produced. This is the least discussed layer and the one with the largest effect.

A race to five leaves far more room for error than a race to eleven. In a short race, a lucky break can decide a rack. In a long race, luck is diluted across racks, and endurance, safety play and in-match tactical adjustment become decisive. The same ranking list can therefore rank two players very differently depending on the average race length of the events they enter.

Prize structure is also a technical variable. Most international events distribute money in a steep pyramid: semi-finalists take most of the fund, and the rest barely covers part of travel costs. For a Vietnamese player, travel and accommodation for an event in Europe or the Middle East can equal the prize money for reaching round three. The decision to enter is therefore not only a sporting decision. It is a financial one, and it directly shapes the data sample we have.

The ranking-points system has a rarely mentioned feature: one good month can shape an entire career. Reaching a semi-final at a high-coefficient event can move a player from outside the top 60 into the top 30, and from there he gains direct entry to major events, which means more chances to accumulate points. This is a self-reinforcing mechanism. It rewards those who already hold an advantage, and it penalizes those who have never had one good week at the right time.

Hosting is the most underrated variable in the whole system. When an international event is staged in Vietnam, home players gain main-draw places, familiarity with international table conditions, and most importantly repeated appearances in the international data system. A hosting slot is a data subsidy, not just a cash subsidy. Binh Duong has played that role for carom. Hanoi has played it for pool. Two localities, two streams, two kinds of capital.

But data capital is only worth something if it is used. After each hosting cycle, what durably remains in the country is usually results and images. Shot-level data, if captured at all, tends to stay inside the promoter's system. This is the gap any billiards nation wanting to move up must close.

The power map and where Vietnam stands

World billiards has three power centres running in parallel, and Vietnam sits in an interesting position: strong in one, rising in the second, and almost absent from the third.

In snooker, power is concentrated in the United Kingdom and is shifting increasingly towards China. The qualifying system and the two-year tour-card structure create a very high barrier to entry. Vietnam has almost no representation in this system, and that is rational on cost grounds.

In carom, power is more diffuse. Europe holds the historical and infrastructural centre, with Turkey, the Netherlands, Belgium and Sweden regularly represented in the closing rounds. Asia has Japan, South Korea and Vietnam. Egypt represents Africa. This is the arena where Vietnam can genuinely compete, not only at individual level but in the number of main-draw representatives.

In pool, the picture is broader and more competitive: the United States, the Philippines, Chinese Taipei, European nations, and China as both market and talent source. Vietnam sits in the middle group, with growth potential but without a deep record of results.

Squad depth is the real geopolitical metric of billiards, and it is measured by the number of players aged eighteen to twenty-three who can reach a main draw at an international event, not by the number of trophies. Trophies measure the past. Depth measures the ability to hold position over the next ten years. In my ledger, that column is the first one I look at when a season closes.

Rules, governance and integrity risk

There is a structural paradox in Southeast Asian billiards that few people want to state plainly.

Billiards is a sport with very high betting liquidity. There are many matches, many intermediate score points within each match, and amateur events run almost weekly. At the same time, most professional players in the region earn too little from competition to cover international travel. The combination of high liquidity and low income is a structural condition for integrity risk.

Where prize money is low and betting flow is high, the rules must be stronger than the cue. This is not a prediction of wrongdoing. It is an observation about incentive structure, and other sports around the world have paid the price for ignoring it.

Three governance areas deserve serious attention. The first is match integrity control, including capturing and storing shot-level data in enough detail to detect abnormal patterns. The second is participation criteria, including wildcards and home slots, because this is where transparency is most often skipped. The third is contractual relations between players and clubs, sponsors and promoters, which are often handled by verbal agreement.

At the level of playing rules, I hold a clear and possibly contentious view. Video review, however necessary for accuracy, is being overused in terms of duration. A ninety-second exchange between referee and review desk can completely break the momentum of a player who is in rhythm. In billiards, stroke rhythm is the most fragile asset. A shot interrupted mid-flow does not only cost time, it costs state. I have recorded many cases where a player on a good scoring run was stopped by a review, then returned to the table with a completely different rhythm. Accuracy should not be paid for with the rhythm of the match. There should be a hard time limit, and a mechanism so players are not frozen mid-run.

Professional ecosystem and psychological pressure

A Vietnamese player's income structure at semi-professional and professional level usually has four sources: prize money, personal sponsorship, exhibition play, and income from a club or coaching. Of those four, prize money is the most volatile and the most discussed. Personal sponsorship often depends on a few televised moments. Exhibition play depends on local fame. Coaching is the most stable source, and that is precisely the concern.

When a player's most stable income comes from teaching others to play, the time available to upgrade his own game is compressed. This is a loop many individual sports have gone through. It does not come from laziness or lack of ambition. It comes from cost structure.

On coaching teams, most Vietnamese players coach themselves. Very few have a dedicated technical coach, and almost none have data-analysis support. Compared with national setups in Europe, where a player may have a technical coach, a fitness specialist and an opponent analyst, the gap is not in individual talent. It is in support infrastructure.

On competitive rhythm, this is the most misjudged variable. Many assume more competition is always better. My data shows the opposite in some cases: a dense run of low-intensity domestic events can degrade the ability to focus at high-intensity international events. A good rhythm alternates deep training blocks with high-pressure competition. A schedule with only competition and no training is an eroding schedule.

On psychology, the metric I care about most is the win rate in deciding racks. Pressure in billiards does not come from the stands, it comes from the silence between your own turns. There is no teammate to share it with, no coach allowed to intervene mid-rack, no one to screen you. The entire interval between two turns, a player is alone with the decision he just made. This is a kind of pressure no fitness metric captures, and it is the kind that decides results in the closing rounds.

The contrarian angle: correlation is not causation

This is the part I have to state plainly, even when it is uncomfortable.

Vietnamese billiards currently has a very attractive growth story: more events, more players, more views, more young players appearing on video platforms. Each of those variables is true when measured alone. The problem is that we read them as a chain of causation, when they are only a chain of correlation.

Take four specific examples.

First, break speed is often equated with class. In my data, the correlation between break speed and match win rate is close to zero at sample sizes below one hundred matches. Correlation only appears when the cue-ball control variable is separated out. What decides is not force, but the ability to stop the cue ball in a safe zone.

Second, practice hours are treated as a direct indicator of improvement. But practice without feedback only reinforces old habits. Among the players I track, those with the most practice hours are not the fastest improvers. The fastest improvers are those with someone recording and giving feedback after each session.

Third, tournament count is treated as an indicator of system health. But more events may only reflect lower organizing costs, not higher competitive quality. A system with three high-quality events usually produces better players than a system with thirty low-quality ones.

Fourth, home advantage. It is true that home players perform better at hosted events, but part of that comes from gaining more main-draw entries, therefore generating more data. That means part of home advantage is a measurement effect, not a playing effect.

Above all of this sits a deeper problem. We only measure what is easy to measure. Pot success is measurable. Decision quality is not. Leave quality is not. The ability to recognize when to stop attacking and switch to safety is not. So the easy metrics gradually become targets, and the hard skills gradually get ignored.

When a metric becomes something people praise, it stops reflecting the game and starts reflecting the person being praised. This is a lesson many sports learned by paying for it. Vietnamese billiards has the advantage of learning late, which means it can learn from the mistakes of those who went first, provided it is willing to look at them.

Billiards has its own rhythm, data has its own rhythm. It took me years to learn how to put them in the same sentence.

Signals for the next cycle

I will not conclude. I will list what I will track next season, and why.

I will track how many Vietnamese players reach the main draw of international events across all three streams. This is the only metric reflecting real depth, because it cannot be dressed up by one good match.

I will track the controlled break rate among young players. If that number rises while win rate does not, we are coaching sound rather than coaching table structure.

I will track the win rate in safety racks under long formats. This is the best predictor of results at multi-day events, and it is the metric domestic clubs almost never record.

I will track data standardization at home. If by the end of next season there is still no common recording format for amateur and semi-professional events, every analysis of Vietnamese billiards will keep stopping at the level of feeling.

And I will track the average age of main-draw qualifiers. If that age rises, the window of results is narrowing. If it falls without a drop in quality, a new generation has genuinely arrived.

I am the one who stays with the spreadsheet after the stands go dark. You may call it a job. I call it a calling. Every season is a data series, but my memory does not belong to any model. Perhaps that is exactly why, night after night in a billiards club, I still open the notebook, still count from the beginning, still wait to see whether a fourth data layer appears.

Method note: figures in this piece come from a personal tracking ledger recorded on site at tournaments and clubs across three seasons, with an estimated error margin of plus or minus two percent on basic metrics. This article is for sports-information reference only and does not constitute betting advice. Competitive results are highly uncertain, and readers should view the conclusions rationally.