How Eyegaze Research Shaped A Candidates Challenger
The Eye‑Gaze Scientist
When Matthias Blübaum sits down at the board in Cyprus later this week, he will carry more than just a 2698 rating and a Cinderella story from the Grand Swiss. The 28‑year‑old German studied mathematics and physics at Bielefeld University – a campus nestled against the Teutoburg Forest, and home to one of the most ambitious research projects ever conducted on chess expertise. Between 2016 and 2019, scientists at Bielefeld’s Cluster of Excellence Cognitive Interaction Technology (CITEC) worked alongside French researchers to literally watch how chess players think – by tracking their eye movements, microexpressions, heart rate and even perspiration. Blübaum was part of that intellectual environment, and the insights from that lab may have quietly shaped the player who now stands on chess’s biggest stage.
The project was called Ceege – an acronym for “Chess Expertise from Eye Gaze and Emotion”. A collaboration between Bielefeld University and France’s Inria Grenoble Rhônes‑Alpes, it ran from 2016 to 2019 with funding of €300,000 from the German Research Foundation (DFG) and the French National Research Agency (ANR).
— Professor Dr. Thomas Schack, head of the Neurocognition and Action research group
Researchers used eye‑tracking glasses to measure where players looked, while cameras recorded facial expressions and body language. A separate team tracked microexpressions, gestures, heart rate and respiration. The goal: to understand why some players see winning moves while others miss them – and to build an AI assistant that could train players by predicting their weaknesses.
By observing more than 120 participants – a third of them chess experts, two‑thirds novices – the team discovered clear differences:
| Expert players | Amateurs |
|---|---|
| Concentrate on key pieces that can decide the game | Jump frequently from one piece to another |
| Control attention more efficiently | Look at nearly all pieces, regardless of importance |
| Show calmer microexpressions during critical moments | Display visible stress even in quiet positions |
Dr. Kai Essig, one of the lead researchers, explained: “Chess experts concentrate for most of the time on the main chess pieces that can make or break the game in respective situations. The experts control their attention more efficiently than novices.”
The team even attempted to predict the outcome of the 2016 World Championship match between Magnus Carlsen and Sergey Karjakin. “Early in the tournament, it was already apparent that Magnus Carlsen would win. He had shown more initiative in the first six matches,” said physicist Thomas Küchelmann. “It was hardly possible for his opponent Sergej Karjakin to dominate the game.”
One of Ceege’s most ambitious goals was to develop an electronic chess assistant that could analyse a player’s gaze patterns and recommend the optimal move. The system was designed to train novices and even help experts refine their intuition. “Looking forward, it would also be conceivable to integrate this assistive system into a robot,” said Professor Thomas Schack. “With their physical presence, robots could motivate players in a different way than for example an assistant operating verbally on a tablet.”
Though the project ended in 2019, its echoes remain. The idea that chess skill can be decoded through eye movement and emotional response has influenced modern training methods, and for a student at Bielefeld during those years, the proximity to such research was a unique intellectual backdrop.
Matthias Blübaum completed his Master’s degree in 2022 – the same year he began his serious ascent in the chess world. His thesis subject has been a matter of speculation; but his approach to chess has always carried the hallmark of a scientific mind. In an interview with ChessBase, he reflected on the balance:
That pragmatism, combined with the analytical rigor of mathematics and physics, may explain his calm, grinding style – a style that carried him to second place in the 2025 Grand Swiss and into the Candidates.
If we apply the Ceege findings, Blübaum’s profile matches that of an expert player – one who efficiently filters irrelevant information and focuses on critical pieces. In a fourteen‑round marathon like the Candidates, that efficiency can be a superpower. The pressure will be immense, but the lab‑trained ability to maintain calm attention could be the edge that turns a Cinderella qualifier into a genuine threat.
The research also highlighted that experts show less emotional volatility in tense moments. Blübaum has already demonstrated that resilience: he qualified for the Candidates with a career‑best performance in the Grand Swiss, and his quiet, almost stoic demeanour at the board has drawn comparisons to the great positional players of the Soviet era.
— Dr. Kai Essig, Ceege project lead
The project could not, of course, predict Blübaum’s Candidates run – but it did help train a generation of players who learned to look at the board differently. For the German grandmaster, the journey from Bielefeld to Cyprus is a testament to the quiet power of deep study, both in science and in chess.
The Bielefeld University blog post from December 2016 that announced the Ceege project closed with a prediction: “It appears that we will even be able to recognize a series of optimal moves that will increase the player’s probability of winning.” Nearly a decade later, one of their own students will attempt to prove that hypothesis on the world’s biggest stage.
Blübaum himself put it more simply: “I’m extremely happy I can make a profession out of a hobby.” On the coast of Cyprus, that hobby meets a lifetime of science, study, and the quiet gaze of a man who learned to see the board as few others do.
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