Four Rule Sets, One Name: The Identification Trap in Billiards Analysis

Night fell at a billiards club on Nguyen Thien Thuat Street, and two tables stood less than two metres apart. On the left, a carom table with three balls resting like three beads. On the right, a pool table with fifteen balls racked in a triangle. A customer turned to me and asked: “Which is better, Quyet Chien or Duong Quoc Hoang?”

I poured more tea, looked at the two tables, and honestly said I had no answer. The question rested on a premise that had tilted long before it was spoken: that those two men are playing the same sport. In Vietnamese, both are called “bi-a”. In competitive reality, they live on different planets.

The match truly begins at the moment nobody touches a ball — the hush before the player bends down, and that hush is the one thing every rule set shares. After it, each rule set continues in a language of its own.

In Vietnam, a single word, “bi-a”, has to carry four competitive systems: carom (one cushion and three cushion), pool (8-ball, 9-ball, 10-ball), snooker, and Chinese billiards — that is, Chinese-style 8-ball played on tight-cut pockets. Fans use one word. Broadcasters use one time slot. Sponsors use one budget line. The Ho Chi Minh City Billiards & Snooker Federation (HBSF) runs events across several disciplines at once, which is normal, because the tables, the cues and the crowds all live under one roof.

That convenience has a price. Each of those four rule sets runs on its own unit system, generated by its own rules. An outsider sees quantities that look alike — percentages, points, innings — and assumes they can be placed side by side. They cannot.

Based on my experience following matches, from domestic events to international ones on screen, I keep noticing something small that ruins a great many arguments: people compare players using a yardstick that belongs to another discipline.

Start with three-cushion carom, Vietnam’s strongest suit. The central unit is the average per inning — points divided by the innings a player is granted. World-class matches usually finish at 40 points, with some finals pushed to 50. A player holding an average around 1.5 to 2.0 per inning already sits among the global elite. Alongside it sits the run — consecutive points within a single inning — and the number of innings a player needs to cover the match distance.

Those two quantities cannot substitute for each other. One player wins 40-38 with an average of 2.0, meaning he finishes in twenty innings. Another wins by the identical score with an average of 1.2 and one huge run at the end. The scoreboard shows the same result. The technical stories are entirely different.

Tran Quyet Chien, who took the three-cushion world title in Cairo in 2026 according to Union Mondiale de Billard (UMB) records, is the model of a player who lives on the average. Bao Phuong Vinh, world three-cushion champion in Ankara in 2026 and the creator of the first all-Vietnamese final in the event’s history, represents the player who lives on the run — explosive strokes, accelerating rhythm. One rule set, two technical signatures.

Move to pool. Here the most quoted metric is the break and run — breaking and clearing the rack without surrendering the table. Then come break success rate, safety success rate, and the quality of push-outs. Matches are counted in racks, played as races to 7, 9 or 11. A pool rack has no average per inning, because innings within a rack do not exist as a statistic. Pool players live on per-shot probability, not on accumulation across a sequence of turns.

Snooker has its own vocabulary, and that vocabulary has entered the mainstream: the century — a break of 100 or more — and the maximum of 147. In snooker, people talk about frames, frame length, and the ability to build a break from an open table. Nobody sets a snooker century beside a three-cushion run, even though both signal a heavyweight cueist.

Chinese billiards adds one more variable: the called pocket. A player must pot the ball and declare the pocket in advance, on a surface whose pockets are cut tight in the snooker manner. Same numbered balls, same cue, but the error tolerance is squeezed and the psychological pressure changes colour.

Each rule set generates its own unit system, and a statistic only means something inside the ecosystem that produced it. An average of 1.5 in three-cushion sounds small next to a 90 percent potting rate in pool. Setting them side by side is like comparing a striker’s goal tally with an archer’s points — both are counted in numbers, and both are meaningless once the units are swapped.

I learned to read matches through numbers, but only when the numbers know how to dance. And they only dance on their own stage. Every shot is a whisper, and a match is a long conversation — but that conversation can only be translated in the language that gave birth to it.

The contrarian view sits here: the fault in calling everything “bi-a” belongs to how the industry organises itself, not to the fans. When every discipline shares one word, they also share one funding line. And when money is shared, whoever allocates it goes looking for a single yardstick. That yardstick is always borrowed from the discipline currently in fashion, rather than from the one currently winning.

In Vietnam, three-cushion carom brings home world titles and a thick tradition. Pool brings a young pipeline, student audiences, and a presence at regional multi-sport games, where cueists such as Duong Quoc Hoang have left their mark. Chinese billiards brings large prize purses and an elaborate media machine. Three currents flow in one channel, and we keep measuring one current with another’s flow rate.

The blind spot of collective memory is this: a strong carom base does not automatically produce a strong pool base. The eye trained on three-cushion learns to read the rails, to calculate three contacts, to love long trajectories. The pool eye learns to read the layout after the break, to choose the clearance order, to accept that a rack can end in silence after a single break shot. Two kinds of eyes. Two kinds of patience.

And here is what is least said: disciplines that do not generate attractive statistics lose the media race even when they win more. A three-cushion run stretched over twenty innings is very hard to cut into a short clip. A break and run cuts in thirty seconds. That asymmetry seeps into how we remember players, not just how we watch them.

The 398 days when no ball rolled on a competition table in front of a crowd were the time I relearned how to read billiards from scratch, and the biggest lesson was simple: to understand statistics, you first have to know which stage you are standing on.

The question I could not answer for that customer is not about who is better. It is about whether we have the patience to learn three or four separate vocabularies for a single sport, or whether we will keep using one yardstick and then wonder why the best players stay outside the frame.