IQ Test for Chess Players

What the largest meta-analysis found

In 2016 Alexander Burgoyne, Giovanni Sala, Fernand Gobet and colleagues published a meta-analysis in the journal Intelligence. It pooled 19 studies, 26 independent samples and 1,779 participants.

Chess skill correlated positively with every broad ability they looked at: fluid reasoning (r = 0.24), comprehension-knowledge (r = 0.22), short-term memory (r = 0.25) and processing speed (r = 0.24). The average across all of them was r = 0.24.

A correlation of 0.24 is real but modest. Squared, it means fluid reasoning accounts for roughly 6% of the differences in chess skill, leaving most of the variation to other things.

Why the overlap depends on age and level

The link was not the same in every group. For fluid reasoning, the correlation was r = 0.32 in youth samples but r = 0.11 in adult samples. It was r = 0.32 in unranked samples and r = 0.14 in players with an official rating.

The authors concluded that cognitive ability matters most for young players and at lower skill levels. Among rated adults, general reasoning explained only about 1% to 2% of chess skill in these data.

Numerical ability correlated more strongly with chess skill (r = 0.35) than verbal ability (r = 0.19) or visuospatial ability (r = 0.13). Chess is not simply a spatial puzzle.

Practice versus ability

Anders Ericsson and colleagues argued that individual differences in expert skill mostly reflect hours of deliberate practice. A 2014 meta-analysis by Brooke Macnamara, David Hambrick and Frederick Oswald in Psychological Science found that deliberate practice explained 26% of the variance in performance in games, including chess, 21% in music and 18% in sports.

That is a large share, but not all of it. Guillermo Campitelli and Fernand Gobet (2011) argued that practice is necessary but not sufficient: among players who reached master level, some needed around 3,000 hours of serious practice while others needed far more.

So the honest picture has three parts: lots of practice, some general cognitive ability, and individual differences in how quickly people improve.

How this test works for chess players

• Each question shows a grid of shapes with one piece missing. You choose which option completes the pattern.
• It is timed at about 12 minutes overall, so it rewards quick, accurate pattern spotting rather than deep calculation.
• No chess knowledge, notation or reading is involved, so club players and beginners face the same questions.
• It is an online reasoning test, not a clinical assessment and not age-normed. Treat it as a puzzle score, not a rating.

What your score does and does not say about your chess

A matrix-style test taps fluid reasoning: spotting rules in unfamiliar patterns. The meta-analysis found that ability correlates with chess at about r = 0.24 overall, so a high score is no guarantee of a high rating, and a modest one says little about your chess.

Your Elo or FIDE rating reflects thousands of hours of pattern memory, opening study and calculation that a 12-minute visual test cannot see. Use the score as a small extra data point about one skill.