Last updated 28 August 2026
What this actually measures
Visual working memory is the short-term store that holds what you have just seen for a few seconds while you act on it. It is famously small — most people manage somewhere between three and five items at once, and that limit barely shifts with effort. What does shift is strategy. Once a pattern grows past four or five squares, holding each position separately stops working and people start grouping them into shapes: a line, a corner, a triangle. That is chunking, and it is the same trick that lets a chess player remember a whole board as a handful of familiar formations rather than thirty-two separate pieces.
Common questions
How many squares can most people remember?
Visual working memory typically holds three to five items at once. Reaching level six or seven usually means you have started grouping squares into shapes rather than memorising each position separately.
Why does the grid get bigger?
So the test keeps measuring memory rather than luck. On a small grid a guess has a decent chance of landing on a real square; as the grid grows, guessing stops working and only genuine recall carries you forward.
Does practice improve the score?
Your score on this specific task will improve with practice, largely through better chunking strategies. Whether that carries over to memory in everyday life is much less certain — the research on transfer from brain-training games is mixed at best.
Is my score saved?
Your best level is kept in your own browser so you have something to beat. Nothing is uploaded and there is no account.