Chimp Test

Numbers briefly appear on screen then disappear. Remember where each number was and click their positions in order starting from 1! As levels increase, you'll need to remember more numbers. One wrong click means instant game over, so click carefully. Display time increases proportionally with the number count, so stay calm and memorize positions carefully. This game originates from actual experiments at Kyoto University's Primate Research Institute, used to compare memory between chimpanzees and humans — a validated cognitive task.

While numbers are visible, focus on memorizing positions starting from the smallest ones. Instead of memorizing numbers individually, try to remember them as spatial patterns — you'll retain more. Memorization time increases with the number count, so stay calm. This technique, called "spatial chunking" in cognitive psychology, means perceiving number positions as shapes or paths. For example, if positions 1-2-3 form a triangle, you only need to remember "triangle" — greatly reducing memory load.

Known as the Chimp Test, this game measures your iconic memory and spatial working memory. In actual research, chimpanzees outperformed humans on this test, making it a fascinating brain game that lets you experience the limits of short-term memory firsthand. Research published in 2007 by Professor Matsuzawa's team at Kyoto University showed that chimpanzee Ayumu could memorize the positions of 9 numbers in just 210ms. This ability relates to "eidetic memory," and humans can also improve it through consistent training.

It measures Iconic Memory and Visuospatial Working Memory. Originating from experiments by Dr. Matsuzawa's team at Kyoto University Primate Research Institute, this test lets you experience Miller's Magic Number (7±2) — the capacity limit of human short-term memory. Most adults can momentarily remember 5-9 items. Brain imaging research shows that during this task, the occipital visual processing area and prefrontal working memory area activate simultaneously, and training improves the efficiency of this connection.

Most people game over at levels 5-7. Level 8+ is excellent, and level 10+ indicates exceptional iconic memory. The chimpanzee Ayumu from the original experiment memorized 9 numbers in just 210ms. Can you beat a chimpanzee? According to Miller's Magic Number 7±2, most adults can momentarily remember 5-9 items, but spatial pattern memorization techniques can help surpass this limit. Daily practice lets you feel your memory capacity gradually expanding.

Yes, it works great on mobile. Directly tapping number positions by touch is actually quite intuitive. The grid auto-adjusts to your screen size, and you can play at the same difficulty as on PC. Touch input is faster than mouse clicking and lets you use spatial memory more intuitively, so some players actually achieve higher records on mobile. Even 3-5 minutes of training during commutes or waiting times effectively improves spatial memory.

Yes! Your highest level reached is auto-saved. A "NEW BEST!" indicator appears when you beat your record. Records persist on the same browser, letting you enjoy the satisfaction of pushing your level higher day by day. Safely stored in local storage with no sign-up needed. Tracking your progress toward chimpanzee Ayumu's level 9 provides fun motivation. With daily consistent practice, you can feel level improvement within 1-2 weeks.