I didn't respond in error. You said the goal was correctly chalked off. I am trying to understand on what basis you think that.
Because the PL SAOT, which is supposed to be the most advanced system out there, has a 5 cm tolerance built into it to take into account inaccuracies and give some element of doubt to the attacker. So, if the Arsenal goal was offside by less than 5 cm it would have been allowed by the PL SAOT because of its tolerance, even though it was disallowed by UEFA SAOT which is supposedly accurate to the mm (which I very much doubt).
That seems like a problem to me. And has been a problem for every toenail offside decision in UEFA (and FIFA) competitions since SAOT was introduced. Some of which had significant repercussions in terms of result.
Hence the question to you, who watched the game, if the offside decision was 5 cm or less.
Wondered why premier waited to use the auto offside so I looked up on Ai>>
Yes, the Premier League uses a different semi-automated offside technology (SAOT) system compared to UEFA. Here are the key differences based on available information:
### Premier League SAOT System
- **Implementation**: Introduced in the 2024/25 season, with live operation starting in Matchweek 32 (April 12-14, 2025), after testing in the FA Cup.[](https://www.espn.com/soccer/story/_/id/44038727/premier-league-fa-cup-semi-automated-var-offside-all-need-know)[](https://www.premierleague.com/news/4273447)
- **Technology Provider**: Developed in collaboration with Genius Sports, using computer vision cameras installed in every Premier League stadium.[](https://www.premierleague.com/news/4082349)[](https://www.premierleague.com/news/4256036)
- **Cameras**: Utilizes up to 30 cameras per stadium, operating at 100 frames per second (twice the speed of typical broadcast cameras).[](https://www.espn.com/soccer/story/_/id/44038727/premier-league-fa-cup-semi-automated-var-offside-all-need-know)[](https://www.premierleague.com/news/4256036)
- **Data Points**: Tracks up to 10,000 surface "mesh" data points per player for precise positioning.[](https://www.espn.com/soccer/story/_/id/44038727/premier-league-fa-cup-semi-automated-var-offside-all-need-know)[](https://www.premierleague.com/news/4256036)
- **Ball Sensor**: Does not use a chip in the ball, unlike FIFA’s system, due to the Premier League’s contract with Nike and patent issues with Adidas (used by FIFA/UEFA).[](https://www.espn.com/soccer/story/_/id/44038727/premier-league-fa-cup-semi-automated-var-offside-all-need-know)[](https://www.dailymail.co.uk/sport/football/article-12589707/Premier-Leagues-plans-automatic-offside-VAR.html)
- **Tolerance Level**: Retains a "tolerance level" (approximately 5cm), giving the "benefit of the doubt" to attackers to avoid marginal "toenail" offside calls. This is unique to the Premier League among SAOT-using leagues.[](https://www.espn.com/soccer/story/_/id/44038727/premier-league-fa-cup-semi-automated-var-offside-all-need-know)
- **Visualization**: Generates 3D automated graphics for in-stadium and broadcast displays, avoiding overlay with broadcast footage for quicker decision visuals.[](https://www.premierleague.com/news/4256036)
### UEFA SAOT System
- **Implementation**: First used in the Champions League from the 2022/23 season group stage and in competitions like the UEFA Super Cup and Euro 2024.[](https://www.espn.com/soccer/story/_/id/44038727/premier-league-fa-cup-semi-automated-var-offside-all-need-know)[](https://www.espn.co.uk/football/story/_/id/37630682/champions-league-use-semi-automated-offside-technology-group-stage)
- **Technology Provider**: Initially developed with Adidas and Kinexon, though the Champions League uses a non-chip system similar to the Premier League’s for regular matches.[](https://www.espn.com/soccer/story/_/id/44038727/premier-league-fa-cup-semi-automated-var-offside-all-need-know)[](https://www.dailymail.co.uk/sport/football/article-12589707/Premier-Leagues-plans-automatic-offside-VAR.html)
- **Cameras**: Employs 10-12 cameras per stadium, operating at 50 frames per second (slower than the Premier League’s).[](https://www.espn.com/soccer/story/_/id/44038727/premier-league-fa-cup-semi-automated-var-offside-all-need-know)
- **Data Points**: Maps 29 data points per player, significantly fewer than the Premier League’s 10,000.[](https://www.espn.com/soccer/story/_/id/44038727/premier-league-fa-cup-semi-automated-var-offside-all-need-know)
- **Ball Sensor**: For major tournaments like Euro 2024, UEFA uses a chip in the ball (Adidas-manufactured) for precise kick-point detection, but not in the Champions League, where a non-chip system is used.[](https://www.espn.com/soccer/story/_/id/44038727/premier-league-fa-cup-semi-automated-var-offside-all-need-know)[](https://www.dailymail.co.uk/sport/football/article-12589707/Premier-Leagues-plans-automatic-offside-VAR.html)
- **Tolerance Level**: Does not use a tolerance level, meaning it makes calls on the most marginal offsides, unlike the Premier League’s approach.[](https://www.espn.com/soccer/story/_/id/44038727/premier-league-fa-cup-semi-automated-var-offside-all-need-know)
- **Visualization**: Also provides automated graphics, but the Premier League’s system is noted for producing higher-quality visuals due to more cameras and data points.[](https://www.espn.co.uk/football/story/_/id/39920409/premier-league-semi-automated-var-offside-all-need-know)
### Key Distinctions
1. **Precision and Speed**: The Premier League’s system is designed to be more precise, with more cameras (30 vs. 10-12), faster frame rates (100 vs. 50 fps), and significantly more data points (10,000 vs. 29).[](https://www.espn.com/soccer/story/_/id/44038727/premier-league-fa-cup-semi-automated-var-offside-all-need-know)
2. **Ball Chip**: UEFA’s system for major tournaments includes a chip in the ball, while the Premier League avoids this due to its Nike contract and uses alternative software for kick-point detection.[](https://www.espn.com/soccer/story/_/id/44038727/premier-league-fa-cup-semi-automated-var-offside-all-need-know)[](https://www.dailymail.co.uk/sport/football/article-12589707/Premier-Leagues-plans-automatic-offside-VAR.html)
3. **Tolerance Level**: The Premier League’s unique tolerance level aims to reduce controversial marginal calls, while UEFA’s system enforces stricter offside decisions.[](https://www.espn.com/soccer/story/_/id/44038727/premier-league-fa-cup-semi-automated-var-offside-all-need-know)
4. **Development Philosophy**: The Premier League developed its own system to be “future-proof” and more accurate, avoiding reliance on FIFA/UEFA’s chip-based technology. This was a deliberate choice, as noted by Premier League Chief Football Officer Tony Scholes.[](https://www.skysports.com/football/news/11095/13339920/premier-league-semi-automated-offside-to-be-introduced-in-top-flight-on-april-12-following-fa-cup-tests-earlier-in-season)[](https://www.espn.com/soccer/story/_/id/43689769/premier-league-wants-semi-automated-var-offside-season)
### Why the Difference?
- **Contractual Constraints**: The Premier League’s long-standing deal with Nike prevented adopting FIFA/UEFA’s chip-based system, as Adidas holds the patent for the ball sensor.[](https://www.dailymail.co.uk/sport/football/article-12589707/Premier-Leagues-plans-automatic-offside-VAR.html)
- **Customization**: The Premier League aimed for a bespoke system tailored to its needs, prioritizing precision and fan experience (e.g., better graphics and tolerance level).[](https://www.espn.com/soccer/story/_/id/43689769/premier-league-wants-semi-automated-var-offside-season)
- **Testing and Timing**: The Premier League delayed implementation to ensure reliability, opting for extensive testing rather than adopting UEFA’s system outright.[](https://www.espn.co.uk/football/story/_/id/41468887/premier-league-delays-semi-automated-offside-var-2025)[](https://www.skysports.com/football/news/11095/13308478/semi-automated-offside-technology-to-be-used-for-fa-cup-fifth-round-in-english-football-first)
### Current Sentiment
Posts on X reflect some frustration with the Premier League’s decision to develop a hybrid system rather than adopting UEFA/FIFA’s established SAOT, with concerns about delays in decision-making (e.g., an 8-minute offside call). However, the Premier League insists its system is more advanced and suited for long-term use.[](https://www.espn.com/soccer/story/_/id/43689769/premier-league-wants-semi-automated-var-offside-season)
In summary, while both systems aim to automate offside decisions, the Premier League’s SAOT is distinct in its higher camera count, faster frame rate, greater data points, lack of a ball chip, and unique tolerance level, making it a more customized and arguably more precise system compared to UEFA’s.[](https://www.espn.com/soccer/story/_/id/44038727/premier-league-fa-cup-semi-automated-var-offside-all-need-know)[](https://www.premierleague.com/news/4256036)