Vietnamese Billiards and the Data Void: Building Your Own Measurement Sheet Before the Major Season

Rack 15, score 7-7. A 9-ball qualifying match on table four at an open event in Hanoi. The home player had two balls left, the 7 frozen near the long rail, the cue ball about a hand's width away from it. He chose a soft push to send the cue ball toward the short rail, but it caught a second cushion and stopped in the middle of the table, leaving an easy cut for his opponent. Four shots later, the rack was gone. On air, the commentator sitting next to me said the familiar line: "He lost focus." I rewound the tape that same night. Frame 42 showed something else. The tip struck the cue ball half a millimetre below centre, enough to create a trace of reverse spin the player had not accounted for. The cue ball met the long rail at an entry angle of about 34 degrees, when the position he wanted required 28. A six-degree error on the rail path, multiplied by cloth speed in the humidity of that evening, pushed the cue ball nearly half a metre off the intended resting point. The lost rack sat in the geometry, plus a physical variable nobody in the arena recorded. The distance between those two explanations is bigger than a single rack. It is the distance between a billiards culture that runs on data and one that runs on memory. Billiards has more players in Vietnam than any sport that does not use a round ball. On the carom side, Vietnam belongs to Asia's strongest group, with Tran Quyet Chien leading the way and international events staged in Binh Duong drawing crowds larger than many Olympic disciplines. On the pool side, 9-ball and 8-ball have exploded over the past decade, clubs have opened across every inner-city district, and Duong Quoc Hoang and his generation carried Vietnamese pool onto the SEA Games stage. In 2026, the Hanoi Open Pool Championship brought the World Nineball Tour to Vietnam for the first time, making Hanoi a stop on the international professional circuit. Running parallel to all of that, the data infrastructure of the sport is close to empty. Football has StatsBomb and Opta, tagging hundreds of thousands of events each season, giving every pass a coordinate and every shot an expected-goals value. Billiards publishes only the end of the story: the score, the racks won, and for snooker the century count, for carom the average. A results sheet never tells you where the cue ball stopped, which shot in the rack it was, when the player chose to play safe, or what that safety left behind. The 2026 shutdown taught me something I still carry: in an empty season, the data is quiet, and that is when it speaks most clearly. While European football was paused, I sat down and redrew transition moments from classic matches, checked expected-goals figures against the video, and found a shot that hit the post had been dropped from the dataset. With billiards, the silence runs deeper. Nobody omitted the data, because there was never any data to omit. An empty season taught me that the silence of data deserves interrogation, and in billiards it deserves interrogation every single day. Anyone analysing this sport has to build the measurement sheet from scratch. I split a billiards match into four data layers and record all of it by hand, rewatching the video after every match I follow. The first layer is positional geometry. Every shot in my sheet carries four values: the distance between cue ball and object ball, the entry angle into a cushion if one is used, the expected exit angle, and the actual resting point of the cue ball after the object ball leaves. I call the gap between expected and actual resting point positional deviation, measured in centimetres. In a semi-professional 9-ball rack, the average deviation of the winning player is usually smaller than that of the loser, but the interesting part is the distribution: both players produce huge misses, and they differ only in when those misses land. Before you tell me a break was good, tell me where the cue ball stopped after the third shot. In 9-ball, most racks are decided from the third shot onward, once the cue ball has crossed at least one cushion and the player must choose between continuing the run and playing safe. The second layer is break efficiency. "A strong break" measures nothing. What measures is the rate of breaks that pocket a ball, the rate of dry breaks, the position of the 1-ball once the table settles, and whether the cue ball stays in the top half of the table. A player who breaks with moderate power but always keeps the cue ball above the head string and always leaves a makeable 1-ball will win more racks than a player who breaks ferociously and lets the cue ball drift into mid-table. In my sheet, a break is graded by the value of the layout it creates, not by the sound it makes. That is where spectators and analysts watch two different matches. The third layer is safety play and defensive geometry. I log three numbers: the rate of safeties that leave a locked-up position, the rate of opponents forced into a kick shot, and the rate of opponents who counter-attack successfully from that same safety. The third number matters most, because it tells you whether the safety was genuinely safe or merely elegant. A tactical system is only trustworthy once I have found its hole. With young Vietnamese players, the hole usually shows up in this group: their safeties are good enough to trouble opponents of similar level, but against a player who reads cushions well, the counter-attack rate spikes and the match swings within two racks. The fourth layer is physical conditions, and this is the most neglected part in Vietnam. Humidity, temperature, cloth speed, ball set, and cushion tension all change how a ball rolls. A pool hall in Nha Trang in September and a dry, air-conditioned room in Europe produce two different rolls from the same push. Cloth absorbs moisture, the ball rolls shorter, spin takes less, and the cue ball stops earlier than the player imagines. If that variable is missing from your sheet, you will blame form instead. I have sat beside players who explained a miss with "my arm was dead today", while the real cause was humidity rising after an afternoon storm and them keeping the same contact point they used that morning. My data-collection method also came out of a mistake. In July 2026, I went on air for a World Cup semi-final and declared that the team I was covering would press high in a 4-3-3. They dropped 35 metres deep. I was wrong live, and the audience noticed. After the match I watched all 90 minutes again and charted 12 transition moments, finding a gap of 25 metres between the midfield and defensive lines. Since then my rule has been: pick exactly 12 decisive sequences per match, redraw them, check the video, record the numbers. In billiards, those 12 sequences are 12 racks or 12 consecutive shot chains. I do not watch a match for entertainment; I watch to find the moment a positional structure begins to collapse. The results repeat fairly consistently: in pool matches featuring Vietnamese players, the structure collapses on the third or fourth shot of a rack, rarely on the final shot that the crowd remembers. One more thing the sheet taught me about carom, something the rankings never say. The average compresses an entire tournament into a single figure, and two players with the same average can have completely different distributions. Someone grinding out 1.2 points per inning all event is a different animal from someone who mixes innings of 8 between blanks. In long formats, the steady player wins. In formats played to 25 or 30 points, the high-variance player gains an edge, because a single explosive inning can end the match. Average hides variance, and variance decides who lifts the trophy in short formats. The blind spot of this method sits exactly where I least want to admit it. Broadcast cameras have angles, and those angles hide what I need to see. The decisive shot often happens at the far end of the table, where the player's body blocks the cue ball at the precise moment of contact. I have to check three or four camera angles, sometimes waiting for a spectator's phone clip to surface online, before I can identify the real contact point. Faith in the naked eye has hard physical limits: the human eye cannot separate half a millimetre on a cue tip at 25 frames per second. But the bigger trap lies on the other side, when the measurement sheet hardens into a fixed lens. I once applied one team's successful formula from Euro 2026 to every subsequent match, convinced that adjusting at the right moment was enough. That formula only worked because the foundation was already stable. With a player whose basic push is still broken, the problem is not tactical adjustment, it is fixing the contact point. My own sheet can become a cage if I forget to check the starting point before talking about solutions. There is a third trap, growing quickly in the Vietnamese market: borrowing football's analytical vocabulary to sell billiards. Phrases like "billiards expected-goals" sound modern and measure nothing, because billiards has no expected value in that sense. Billiards has geometry, pocketing probability by angle and distance, and table conditions. Anyone telling you a single composite index captures a player's form is selling you a product. At the next event, I will track two numbers first: the dry-break rate of the home players, and the rate of safeties that leave a locked-up position across the first three racks of each match. Neither requires expensive equipment, only someone sitting down after the match with the video and a sheet of squared paper. Champions are not players who never lose; they are the ones who err fewer times under the same pressure. A layout is only the residue of every decision already made on the cloth, and if you never record those decisions, all you will keep is the memory of beautiful shots.