When a chess grandmaster moves a piece in seconds rather than minutes, something remarkable is happening: intuition is winning. A new study published in the Proceedings of the National Academy of Sciences reveals that professional chess players who make faster decisions tend to make higher-quality moves—a finding that challenges our intuition about the value of deliberation and offers insight into how human expertise actually works.
Professor Uwe Sunde from Ludwig Maximilian University of Munich led a research team including scientists from Erasmus University Rotterdam and UniDistance Suisse to investigate a deceptively simple question: does the time a player spends on a move correlate with how good that move actually is? The conventional wisdom might suggest that more time equals better decisions, but the reality is more nuanced and more interesting.
The researchers took an elegant approach to studying complex decision-making outside the sterile confines of the laboratory. Rather than asking students to solve puzzles, they analyzed actual moves from professional chess tournaments, measuring how long each player deliberated before moving and then comparing those decisions against the objective benchmarks set by chess engines. This allowed them to assess decision quality in real strategic situations, where stakes are high and complexity is genuine. They even compared decisions made by the same player against the same opponent across multiple games, controlling for variables like computational complexity and time pressure.
The results were clear: faster decisions correlated with higher quality, even after accounting for the objective difficulty of the position, the number of viable alternatives available, and the mounting pressure of the clock. But here's where the finding becomes profound. When a player spends longer thinking about a move, they tend to make worse decisions—not because the position itself is harder, but because they perceive it to be harder. Conversely, quick decisions often signal something else entirely: intuition, an almost instinctive grasp of what the best move is.
"With this study, we've been able to show that, if you keep the objectively measurable difficulty of the decision constant, somebody who thinks for longer will make worse decisions," Sunde explained. That perception gap is key. A player wrestling with a position for five minutes may be signaling not careful analysis but rather confusion—a subjective sense that the problem is intractable. A player who sees the right move immediately possesses something that machines still cannot replicate: the human ability to recognize quality from pattern and experience.
Sunde sees in these findings a fundamental distinction between human and artificial intelligence. "This is what distinguishes humans from machines: Humans can often recognize what's good or what isn't good from the situation. But if a person doesn't manage to grasp the situation quickly, they find it difficult to continue computing the problem rationally." In other words, once intuition fails, rational analysis often fails too.
The implications extend far beyond the 64 squares of a chessboard. Sunde suggests that these insights about expertise, intuition, and decision speed may apply to any field requiring complex strategic thinking—medicine, business, design, leadership. The lesson is counterintuitive but powerful: sometimes, trusting your gut is not a bias to overcome but a feature of expert cognition to cultivate.