ChimpTest
A free memory game inspired by Ayumu the chimpanzee at Kyoto University
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A free browser game where numbered squares flash and hide, then you tap them back in ascending order. Inspired by memory experiments with a chimpanzee at Kyoto
About ChimpTest
ChimpTest is a free, browser-based memory game with no sign-up or download required. Numbered squares appear on the board for a brief flash, then hide under blank squares. You must tap them back in ascending order; clear the board to advance to the next level, which adds a square and shortens the flash window. Three wrong-order taps end the game.
The game is inspired by the limited-hold memory task published by Sana Inoue and Tetsuro Matsuzawa at Kyoto University's Primate Research Institute in 2007, in which a juvenile chimpanzee named Ayumu tapped masked numerals in order faster and more accurately than university students after very brief exposures. However, the game differs from the original experiment: it uses progressive levels with shrinking flash windows, rather than the original's fixed exposures.
The game exercises visuospatial working memory and attention under time pressure. It is trainable and fun, but does not measure photographic memory, diagnose anything, or serve as an IQ test. All scores are stored locally in your browser; nothing is uploaded to any server.
- memory game
- working memory
- ayumu test
- free game
- browser game
- brain training
Features worth knowing
- Progressive levels that add numbered squares
- Flash window shrinks as difficulty increases
- Three-strike game over system
- Local browser storage of scores
- Challenge links with shared level difficulty
- Customizable flash speed via URL parameter
Pricing
Pricing model: Free
ChimpTest metrics
| Metric | Value |
|---|---|
| Domain Rating | 6 no change since last check |
| Trust Flow | 6 no change since last check |
| Citation Flow | 20 no change since last check |
| Referring domains | 3 no change since last check |
| External backlinks | 5 no change since last check |
Ahrefs Domain Rating scanned 3 Nov 2026, updated 3 Nov 2026. Main topic: Recreation/Outdoors (6). Majestic scanned 3 Nov 2026, updated 3 Nov 2026. Link stats via Majestic. Trust Flow, Citation Flow and Topical Trust Flow are trademarks of Majestic-12 Ltd.
ChimpTest domain facts
Reveal the domain facts
| Domain age | 11 months |
|---|---|
| Registered | |
| Expires | |
| Registrar | DNSPod, Inc. |
| DNSSEC | Not signed |
ChimpTest launch results
| Measure | At launch, then latest |
|---|---|
| Domain Rating (Ahrefs) | 6 first measured 3 Nov 2026 |
| Trust Flow (Majestic) | 6 first measured 3 Nov 2026 |
| Referring domains (Majestic) | 3 first measured 3 Nov 2026 |
Day 0 since launch. Next receipt: day 30, 3 Dec 2026. The figures report a change; they do not say what caused it, and many things can. No figure here is a guess.
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FAQ
- Is this the actual test Ayumu took?
- No, it is inspired by the original test. The 2007 Kyoto University experiment used numerals 1–9 that appeared on a touch screen and were masked by white squares, with automatic masking after 650, 430 or 210 milliseconds. ChimpTest uses the same flash-mask-tap-in-order idea but adds levels, lives and a progressive difficulty curve that the lab task did not have.
- What does my level mean?
- Your level is the board you reached. Level 1 deals 4 squares, and every cleared board adds one more square, up to 9 squares at level 6. After level 6, the square count stays at 9 but the flash window keeps shrinking toward 650 milliseconds, matching the longest exposure Ayumu faced in the published experiments.
- Does this test measure photographic memory?
- Not really. The original experiment was titled working memory of numerals, not photographic memory. The task taps visual working memory, attention and scanning strategy. True photographic memory in adults has never been verified in a controlled study.
- Where are my scores saved?
- Scores are saved in your browser's localStorage on that device only. The data includes runs played, best level reached, and total taps. Nothing is uploaded and there is no account; clearing site data resets the record.
- Can I get better at it?
- At this task, yes — demonstrably. When researchers gave humans practice on the real masking task, two participants matched Ayumu's accuracy. Whether that training makes you generally smarter is a different, much weaker claim. See can you actually train this.
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