Omnibus

0

Score

1

Level

4

Tiles

0

Streak

0/3

Strikes

Chimp Test

Numbers appear on the grid. Tap 1 — every other number vanishes — then tap the rest in order from memory.

Three strikes and the run is over.

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Chimp Test

Numbered tiles are scattered across a grid. Study them as long as you like — then tap the first one, watch every other number vanish, and find the rest in order from memory. Each round you clear adds another tile. Free, no sign-up, no download.

Tap in order, from memory

The numbers vanish the instant you tap the first tile. Everything after that comes from what you held on to.

One more tile each round

Start with four and climb. The grid stays the same size, so the tiles only get harder to separate.

You choose when to commit

There is no reveal timer. Study the board as long as you like — the test begins on your first tap.

Classic and Practice

Play a scored run with three strikes, or drop the strike limit and work on a tricky tile count.

Personal best saved

Most tiles, highest score, level and streak — remembered locally on your device, per mode.

Private & client-side

The whole game runs in your browser. Nothing is uploaded, and it is free with no sign-up.

How to Play

  1. 1. Numbered tiles appear scattered across the grid.
  2. 2. Study them for as long as you want — nothing is timed.
  3. 3. Tap tile 1. Every other number disappears.
  4. 4. Tap the blank tiles in ascending order from memory.
  5. 5. Clear the round and another tile is added.

About the Game

The chimp test is a spatial working-memory task: you are holding a set of positions, and the order that connects them, for a few seconds while acting on them one at a time. What makes it hard is not the remembering so much as acting without re-checking — every tap you make removes a landmark you might have been using to orient the rest.

It is a game, not an assessment. A score here is not an IQ measurement, not a clinical result, and not evidence of anything about you beyond how you did at this particular task today. Fatigue, screen size and how much you have played all move the number around, which is exactly why it is worth playing more than once.

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Frequently asked questions

How do you play the chimp test?
A handful of numbered tiles appear scattered across the grid. Take as long as you like to study them, then tap tile 1 — at that moment every remaining number disappears, leaving blank tiles. Tap the rest in ascending order from memory. Clear the round and the next one adds another tile.
Why is it called the chimp test?
It comes from work at the Primate Research Institute in Kyoto, where chimpanzees — most famously one named Ayumu — were shown numerals on a touchscreen that blanked after a fraction of a second, and were able to tap them in order with striking accuracy. The finding that young chimps could outperform human adults on this particular task is what made it famous. This is the same task at a human pace, with the reveal ending when you choose rather than on a timer.
How many tiles should I be able to hold?
Most people manage somewhere between 5 and 9 tiles fairly comfortably and start slipping after that. Getting past a dozen is genuinely hard. There is a lot of variation between people and between attempts, so treat your own trend as the interesting number rather than any particular threshold.
Is it better to memorize the numbers or the positions?
Most people find positions easier than numerals — you are really remembering a shape or a path across the grid rather than a list. Some players chunk the tiles into small clusters; others trace a route. Both work, and finding out which suits you is most of the fun.
What's the difference between Classic and Practice?
Classic ends your run after three wrong tiles, which is what makes a score mean something. Practice has no strike limit, so you can sit on a difficult tile count for as long as you like and work on your method without the run ending.
Does a wrong tile end the round?
Not immediately. A wrong tap costs a strike and shows you the board again, then replays the same tile count in fresh positions. Only the third strike ends a Classic run.
Is my score saved?
Your most tiles held, highest score, highest level and best streak are stored locally in your own browser, kept separately for Classic and Practice. Nothing is uploaded, there is no account, and no server ever sees your scores.
Is it really free, and does it work offline?
Completely free, with no sign-up and nothing to install. The whole game runs client-side, so once the page has loaded it keeps working even on a flaky connection.

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