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VAR stands for Video Assistant Referee

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And the ball itself is part of the system too. The official World Cup match ball contains a sensor built into its side that captures the exact moment of a kick, along with the ball's speed, direction, and spin, sending all of that data wirelessly hundreds of times per second. This is what makes it possible to determine the precise moment the ball leaves a player's foot — which is the exact moment that matters for an offside call. That data is combined with the player tracking data in near real time, and if a potential offside is detected, an automated alert goes straight to the VAR team.

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It's a remarkable system. Cameras, sensors, wireless data transmission, computer vision, real-time 3D modeling — all made with the same building blocks our students learn to work with at The Coding Space — running simultaneously across a stadium full of 80,000 people.

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So why is it so controversial?

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Despite the sophistication, VAR has been one of the most debated innovations in football since it was introduced back in 2028. Part of the frustration is simply the time it takes. Even with automated alerts, reviews can drag on for several minutes, killing the momentum of a game at exactly the moments when emotion runs highest. Fans inside the stadium often have no idea what's happening or why the game has stopped, which creates a strange disconnect between the spectacle on the pitch and the experience in the stands.

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But the deeper controversy is about what the technology has made possible, and how it has changed soccer.

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Semi-automated offside detection can determine that an attacker's foot was 2.3 centimeters ahead of a defender's knee. (It has happened several times during this World Cup)

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Objectively, that's accurate. But it raises a real question about what the offside rule is actually for — and whether a margin that no human eye could ever detect should be the difference between a goal and a disallowed one, a win and a loss. The technology has introduced a level of precision the game was never designed for.

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There's also the question of consistency. VAR was introduced with the promise of correcting only clear and obvious errors. In practice, the threshold for what counts as clear and obvious has been applied differently across competitions, leagues, and referees — leading to situations where nearly identical incidents produce entirely different outcomes. And despite all the technology, the decisions still ultimately rest on human judgment. VAR doesn't eliminate controversy. It just moves it to a different room.

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Whether you think that's progress or a problem probably depends on how you feel about the relationship between sport and technology — and whether you believe the pursuit of perfect accuracy is worth what it costs the experience of the game.

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What do you think about the VAR system?

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At The Coding Space, we love using moments like this to show students that the technology shaping the world around them — from a World Cup stadium to a smartphone — is built on the same foundations they're learning in class: data, logic, engineering, and code. If this got your child curious about how it all works, we'd love to show them more.

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🔗 Explore our programs here!

","frontmatter":{"bgColor":"#faf6ee","date":"July 13, 2026","featuredImage":{"alt":"VAR Room","image":{"childImageSharp":{"gatsbyImageData":{"layout":"fullWidth","backgroundColor":"#080808","images":{"fallback":{"src":"/static/bedb2008e7f9b418261c435428ef9603/7475d/var.webp","srcSet":"/static/bedb2008e7f9b418261c435428ef9603/41031/var.webp 750w,\n/static/bedb2008e7f9b418261c435428ef9603/34007/var.webp 1080w,\n/static/bedb2008e7f9b418261c435428ef9603/c406c/var.webp 1366w,\n/static/bedb2008e7f9b418261c435428ef9603/7475d/var.webp 1440w","sizes":"100vw"},"sources":[]},"width":1,"height":0.6673611111111111}}}},"title":"The Amazing (and Controversial) Tech Behind the FIFA World Cup","titleColor":"#264548","description":"If you've been watching the World Cup this summer, you've probably experienced this moment. A goal is scored, the stadium erupts — and then everyone stops and waits. A few tense minutes pass before the referee signals a decision—half of the crowd cheers, the other groans.\n\nMeet VAR. But most people watching have no idea what's actually happening during those few minutes, and the technology behind it is far more remarkable than it might seem.\n","tags":null,"pageBuilder":null}}},"pageContext":{"id":"84018be8-8da6-588e-b52a-026f13c505a4"}}, "staticQueryHashes": ["4080856488"]}