How's your memory, really?
Five quick tests of working memory — starting with the one chimpanzees are famous for beating humans at.
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Click the tiles in order, 1 → 4. The instant you click "1", every number vanishes — finish the round purely from memory.
Round over
You correctly cleared tiles.
Last 10 attempts
Watch the tiles light up, then repeat the sequence by clicking them in the same order.
Round over
You reproduced a sequence tiles long.
Last 10 attempts
A number will flash briefly. Memorize it, then type it back once it disappears.
Round over
You correctly recalled digits.
Last 10 attempts
A set of tiles will flash. Memorize them, then click exactly those tiles once they reset. Three lives; the grid grows each level.
Round over
You reached level .
Last 10 attempts
Words appear one at a time. Mark each SEEN if it has already shown this game, or NEW if it hasn't. A wrong call costs a life.
Round over
You survived words.
Last 10 attempts
Brain score
One number across all six tests. Each best score maps to 0-100 on the scale of its test, then the tests you played are averaged. Stored on this device only.
About these games
The Chimp Test recreates a well-known working-memory task from primate cognition research: young chimpanzees at Kyoto University's Primate Research Institute were found to briefly outperform human adults at recalling the position of numbers that vanish the moment you start clicking. It's a genuinely hard test of your visuospatial working memory — most people plateau well before double digits.
Sequence Memory tests a different kind of recall: how long a pattern you can hold and reproduce in order. Number Memory strips it down further, testing pure digit-span recall — the same skill behind remembering a phone number just long enough to dial it. Visual Memory pushes your spatial recall as a growing grid of tiles flashes and you click them back from memory, and Verbal Memory switches to words, tracking how many you can keep straight as SEEN or NEW before you slip.
The N-Back Test is the odd one out and lives on its own page: instead of a ladder you eventually fall off, it is a timed session you repeat, where a square jumps around a grid and you flag every repeat of the position n steps back. The level moves up and down on its own as you improve, and it is scored with hits, false alarms and d-prime rather than a percentage — because on a task where most trials are not targets, a percentage flatters you for pressing nothing.
All these games run entirely client-side in your browser. Nothing you do here is uploaded or stored anywhere except your own device's local storage, which is what powers your best score and history.
Play each test on its own page
Prefer a single test with no tabs? Each game has its own dedicated page:
Learn more about memory training
What's a good memory score?
Realistic benchmarks for the Chimp Test, Sequence Memory, and Number Memory, and how they compare to classic working-memory research.
How to improve your working memory
Genuine techniques — chunking, spatial visualization, and short consistent practice — plus honest limits on how trainable working memory really is.
The history of the Chimp Memory Test
The real story behind the name: Ayumu the chimpanzee, Kyoto University's research, and the eidetic memory debate it sparked.
How this test works
A look under the hood: how scoring and history work, and exactly how difficulty scales each round in all three modes.
