A Tuesday night, a pool hall tucked down an alley off Lach Tray Street in Hai Phong. A phone propped against a chalk box, a match running on screen: a 9-ball table, two players in competition shirts, the click of balls dry and quick. I opened my spreadsheet, put two fingers on the keyboard, and stopped at the third column — the one that names the discipline.

I could not fill it in.

Everyone in the room knew it was billiards. But to produce a usable number — a price, a probability, a judgement that can still be checked three months later — "billiards" is not enough. That word names an entire family of sports, while my sheet needs the name of exactly one. And I had just realised that across four years in this trade, most of my error came from forgetting that, not from the model.

Data never lies, but I have misheard it before.

One name, four technical systems

I came to billiards from football. In 2026, aged 17, I first applied xG to the V.League for Hai Phong versus Sanna Khanh Hoa on matchday 18. Hai Phong generated 2.8 xG against 1.0, and I predicted 3-1. The match finished 0-1; goalkeeper Tran Buu Ngoc made seven saves and wrecked my model. I sat down and hand-recorded 20 consecutive matches to cross-check, and drew a rule I still use: a single metric is never a conclusion.

When I moved to billiards, I assumed I had carried that discipline with me. I was wrong in a different, deeper place: I assumed billiards was one sport.

In Vietnam, the word covers at least three major branches. Carom, comprising one-cushion and three-cushion, is played on a table without pockets and scored in innings and points. Pool, comprising 8-ball, 9-ball and 10-ball, is played on a pocketed table and scored in racks. Snooker is played on a large table with tight pockets and scored in frames and points. The three differ in table, balls, cue, rules, tournament systems, and in how a professional actually earns a living.

Inside Vietnam alone, a professional three-cushion player and a professional 9-ball player share almost no metrics. The first is measured by average points per inning. The second is measured by the share of racks won after a break. Those two numbers cannot sit in the same column.

Yet in the market they are routinely placed side by side under a single label. That is where nearly every error I have made begins.

Which metric belongs to which discipline

A data column only means something once the discipline is fixed. Until it is fixed, every number in that column is noise.

In snooker, the units are frames and points. The headline metrics are the century break — a visit of 100 or more — and the maximum 147. These exist only in snooker, tied to the structure of 15 reds and six colours. Ronnie O'Sullivan, according to professional tour records, holds the record of 15 competitive 147s, including the fastest in history: five minutes eight seconds, made at the 2026 World Championship against Mick Price. He also has seven world titles, level with Stephen Hendry.

Carry that "century" column into a 9-ball match and it is meaningless. In 9-ball the unit is the rack, and the key metric is the rate at which a player breaks and finishes the rack in the same visit. Alongside it sit push-outs, pot success after the break, and, under modern rules, a shot clock on every attempt. A good 9-ball player does not need 100 points; he needs to clear the table in one visit.

Chinese 8-ball is another system again. A nine-foot table, but with pockets cut in the snooker style, far tighter than a standard pool table. Group assignment and the deciding black give the match a structure close to American 8-ball, while the technical demand sits closer to snooker. That is why a pure pool player's metrics do not transfer directly. The world championship in this discipline has been staged annually in Yushan, Jiangxi province, since 2026, with prize funds counted in millions of renminbi.

Three-cushion carom sits almost entirely apart. No pockets, only three cushions and a target point. The units are innings and points; the core metrics are average per inning and longest run. An average of 1.5 points per inning is a very high world-class figure; at amateur level, 0.5 is respectable. In three-cushion, cue-ball placement and reading the cushions matter more than speed, and the gap between levels shows most clearly in how long a player can keep the cue ball inside a safe zone across consecutive innings.

Four systems, four metric sets, four ways of reading. In Vietnam, all four exist side by side, often in the same city, sometimes in the same room.

Tournament systems and the money flow

Once the discipline is fixed, the next question is which circuit the event belongs to, because the circuit determines both ranking and prize distribution.

Professional snooker revolves around what the trade calls the Triple Crown: the World Championship at the Crucible Theatre in Sheffield, England, staged there since 2026; the UK Championship; and the Masters. These three carry the greatest weight in a career, and they shape legacy.

Professional pool belongs to a different circuit, run by Matchroom. The world 9-ball championship sits inside it, alongside the Mosconi Cup — the Europe versus USA team event named after the legend Willie Mosconi, staged since 2026. The Matchroom signature is short format, fast rhythm, and a high capacity for upsets.

Chinese 8-ball took the commercial route. Large prize funds, events concentrated in China, and qualifying systems open to international players. A European or Asian pool professional can fly to Jiangxi several times a year just for these events.

Carom has its own structure: the Union Mondiale de Billard (UMB) runs the world championship and a World Cup series spread across countries, accumulating ranking points. This is the circuit Vietnam is deepest into. The 2026 three-cushion world championship was held in Binh Duong, the first time the sport's top-level world event took place on Vietnamese soil.

The analytical consequence: calendars, formats and prize weighting across these four circuits cannot be converted into one another. A player in good form in one circuit tells you nothing about another. And if a dataset merges all four into a single "billiards" column, every form comparison is already wrong at the first row.

Format decides who wins, not class

The same player, the same form, can produce entirely different results if the format changes. This is the part viewers skip when comparing records across branches.

In snooker, major matches use long formats, some stretching across two days and more than 30 frames. Length cancels luck: a single miss rarely decides a match, and class eventually surfaces. In 9-ball, most events run to 7, 9 or 11 racks. One lucky break or one opponent error swings the match. Chinese 8-ball usually runs to 13 racks or more, sitting between the extremes. Three-cushion is played to a target score, commonly 40 points, with a limit on innings.

Format is a variable independent of class, and ignoring it is the fastest way to misread a result.

I once used win rates in race-to-7 matches to infer a player's strength in long format, and the result was far off. The lesson was identical to my 2026 V.League lesson: I had compared two things measured in different units.

The power map

At snooker's top tier, the old generation still holds the centre. The 2026 cohort — O'Sullivan, John Higgins, Mark Williams — remain competitive in major events after more than three decades as professionals. China has produced players close to the top group, with Ding Junhui the pathfinder.

In pool, the Philippines and the United States remain the two traditional sources, while Europe and Asia keep adding title-calibre players. In Vietnam, Duong Quoc Hoang is the name that has reached a world summit in a pool discipline, according to international tournament records.

In carom, Europe still holds the historical position. Belgium's Raymond Ceulemans is credited with more than 20 world titles across his career. The Netherlands' Dick Jaspers and Sweden's Torbjorn Blomdahl have maintained elite level for decades. But Vietnam has pushed into that group with a generation of its own: Ngo Dinh Nai, Tran Quyet Chien, Nguyen Quoc Nguyen, and later Bao Phuong Vinh, who has stood at the top of the three-cushion world championship.

This is the point I consider most important in Vietnam's billiards power map: Vietnam's real strength lies in carom, the branch with the least English-language data and the least market pricing. Meanwhile pool — where international data is thickest — is where Vietnam has less depth. Those two facts are routinely merged into a vague sentence about Vietnamese billiards rising.

Governance, integrity and risk

Each branch has its own governing body. Professional snooker sits under the WPBSA and World Snooker Tour. Pool sits under the World Pool-Billiard Association (WPA). Carom sits under the UMB. Domestically, the Vietnam Billiards & Snooker Federation organises the national system and manages players.

The largest risk in any individual sport with betting markets is the integrity of results. In snooker, in 2026, the WPBSA announced sanctions against a group of Chinese players over match-fixing, following a long investigation. The case illustrates a rule I still apply when assessing risk: at prize tiers with low money, financial pressure on players is greater, and integrity risk is higher accordingly. That is a structural variable, not an accusation against any individual.

In billiards this risk is harder to detect than in football. A missed shot in 9-ball can look identical to a genuine miss. No slow-motion replay is enough to separate intent from technical error. That is why I set a rule for myself: for any billiards data source, I need to know who measured, how, under what conditions, and what that source is hiding.

The supply chain of a mislabelled sport

The billiards industry runs along a fairly clear chain. Upstream: practice rooms, pool halls, tables, cues, cloth. Midstream: players, tournaments, television and streaming platforms. Downstream: sponsorship, digital content, and betting markets.

In Vietnam, the upstream is strong in volume and weak in standardisation. Pool hall density is high, but table conditions vary widely, and that directly affects results. A player who practises on smooth cloth and generous pockets faces a completely different problem on a competition table with tighter pockets and fresh cloth.

The midstream lacks a data layer. Domestic match data is largely not recorded automatically. There is no standardised scoring system across events, no public innings database for three-cushion, no stored break-success rates for domestic pool events. Analysts have to record by hand.

Based on my own experience following matches, the gap between practice table and competition table is one of the most underrated variables in Vietnamese billiards. I once hand-recorded 20 football matches to cross-check metrics. Now I hand-record every inning of domestic three-cushion matches, and I know exactly what that feels like: slow, error-prone, and the only way to obtain primary data.

Psychology and the player life cycle

Billiards is a sport in which competitors sit down a great deal. There is no team-mate to share the pressure, no one to hold the position mid-match. When a player loses rhythm, no coach is allowed onto the arena floor to pull him back. That is the biggest difference from the team sports I used to analyse.

Career curves also differ by branch. Snooker allows players to hold a peak into their mid-thirties and beyond, because long formats reward experience and match management. Pool peaks earlier, because cue speed and the ability to handle pressure in short racks are decisive. Carom sits in between, with many players still competing at a high level past forty, thanks to cushion-reading skill accumulated over time.

In Vietnam, media pressure on carom players is far lower than on pool or snooker players. That has an upside: they concentrate better. And a downside: they lack the financial incentive to professionalise fully.

The counter-intuitive part: a blank column is a signal, not a bug

Here is where I argue against the crowd. When an analysis sheet returns a blank discipline column, the standard response is to treat it as a data-entry error and fill in something. That produces a feeling of completeness while destroying the value of the entire sheet.

The blank column is a structural signal. It reflects that this sport has not yet standardised itself at the data layer. Four technical systems, four circuits, four governing bodies, and one shared name on the signage. While the structure remains fused, the market prices the label rather than the discipline. And when the market prices the label, the gap between price and reality sits exactly there.

For an analyst, that is good news. The edge lies where basic data discipline already creates distance. Whoever separates the labels sees what others do not.

The crowd laughed. The numbers did not. A year later, I reposted that piece.

There is a second counter-intuitive point, and it concerns Vietnam directly. While most media attention flows to pool and snooker — the branches with international imagery, television and famous names — it is carom where Vietnam has real results and a real player pipeline. But carom is the hardest branch for outsiders to follow: no viral highlights, no three-second shock shot, only long innings and dry efficiency figures.

That gap is a data gap. And for me, the data gap is the most interesting place to sit.

Figures still needed

I always keep this section at the end, and this time it is longer than usual, because the subject of the piece is missing data itself.

Chinese 8-ball prize figures change by year and by sponsor, so I state magnitude rather than assert a fixed number for every season. O'Sullivan's 147 count and the world-title counts of carom players come from professional tour records, and those records are updated after each season.

Most importantly: there is no public, standardised, sufficiently long dataset for Vietnamese billiards in any branch. Every conclusion in this piece should be read as an analytical framework, not a record table.

Three thousand matches taught me that one match can teach more than all of them. But one match can also make me think I understand an entire sport.

What to track next

The first signal I watch is the discipline label in official results. If domestic events begin recording discipline, format and unit of measurement, a data layer will form from the bottom up.

The next signal is the UMB ranking points of Vietnamese players across World Cup stops. That points series is one of the few continuous, public, verifiable data series Vietnamese billiards currently has.

And the most notable medium-term signal is the money flow from the Chinese 8-ball circuit. If prize funds keep rising, they will pull players from other circuits, and the power map will shift within three to five years.

I do not write to persuade anyone. I write so that the data has a witness.

Meanwhile the Tuesday spreadsheet is still there, and the third column is still blank. I am leaving it that way. A blank column in the right place is worth more than a full column in the wrong one — and in a family of sports with four different technical systems, the first task is to name correctly what you are looking at.

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This piece belongs to the sports data analysis section. It is provided for information only and does not constitute betting advice. Competitive outcomes are highly uncertain; readers should treat the conclusions cautiously and verify sources themselves.