Press Start, take one look at the lit tiles, then tap the same tiles back once the grid goes dark.
ReadytilesA sample pattern. Press Start, then tap the tiles that were lit.
More options
The pattern lights for one second, the way a camera would take it. It starts at 4 tiles and adds 2 after every cleared board, so 24 tiles is the 11th board. At 20 tiles one second is 50 ms a tile: far too short to look at each one.
–This run
–Your best
–Last run
Starts at 4 tiles and adds 2 after every cleared board, up to 24. The grid grows with the pattern, from 3 by 3 to 7 by 7, so fewer than half the tiles are ever lit. The pattern shows for about 1000 ms. Tap the tiles that were lit, in any order. Dark tile number 3 loses the board, which is a strike and a new pattern of the same size. The run ends at 3 strikes. The result is the biggest pattern you cleared.
One-second snapshotThe pattern lights for one second, the way a camera would take it. It starts at 4 tiles and adds 2 after every cleared board, so 24 tiles is the 11th board. At 20 tiles one second is 50 ms a tile: far too short to look at each one.
Quarter-second glanceA 250 ms flash, a quarter of the snapshot: too short to move your eyes around the grid. It starts at 3 tiles and adds one at a time, so whatever you rebuild came from a single glance.
Snapshot with no wrong tapsThe one-second snapshot with nothing forgiven: the first dark tile you tap ends the run. A photograph does not guess, so this round scores only the pattern you rebuilt exactly.
Show all 11 rounds and notes (8 more)
Study, wait, then rebuild 3
Ten-second studyThe pattern stays lit for ten seconds, time to look at every tile, then goes dark. It starts at 6 tiles on the 4 by 4 grid and adds 2 a board. Compare it with your one-second snapshot: the gap is what the extra looking bought you.
Ten-second study, ten-second waitTen seconds to study, then the grid stays dark and locked for ten more before it takes a tap. A picture that is truly still in front of you would survive the wait untouched.
Ten-second study, thirty-second waitThe longest hold the test allows: thirty seconds of dark grid after the study. By the time the grid unlocks, all that is left is what you stored.
What the research says 5
A random-dot test passed onceAround 1970 one woman was reported to recall random dot patterns well enough to combine two of them from memory into a 3D picture. She remains the only person documented to pass such a test, and it was never repeated.
Eidetic and photographic are two claimsThe words are used as one, but they can be told apart. Eidetic memory is seeing a picture for a few minutes after it has gone. Photographic memory is recalling a whole page of text or numbers in detail after one look.
Eidetic images are reported mostly in childrenEidetic imagery turns up in two to ten percent of six- to twelve-year-olds, and is virtually nonexistent in adults. Photographic memory, the page-of-text kind, has never been shown to exist.
Even eidetic recall is not a copyThe image begins to fade within minutes of the picture being taken away, and what people report from it often has small errors, including details that were never there. That is why this page has wait rounds.
Memory champions use methods, not snapshotsRecall only counts as eidetic when no memory technique is used. None of the best competitors at the World Memory Championships has claimed a photographic memory: they train methods that anyone can learn.
How this list was compiled: Rounds and notes written for this page on 2026-09-26. The research notes are from https://en.wikipedia.org/wiki/Eidetic_memory, read on 2026-09-26: eidetic and photographic memory are used interchangeably but also distinguished, eidetic memory being the power to see an object for some minutes once it is gone and photographic memory recalling whole pages of text or numbers in great detail; eidetic memory is reported in a few children and as a rule not in adults, and nobody has shown that true photographic memory exists; eidetic memory turns up in two to ten percent of six- to twelve-year-olds and is virtually nonexistent in adults; the image starts losing vividness and stability within minutes once the stimulus is removed; eidetikers' memories are rarely perfect and often hold small errors, including details that were not in the original, so even eidetic memory often appears reconstructive; around 1970 one woman was reported to recall random dot patterns well enough to combine two of them from memory into a stereoscopic image, and no one else is on record as passing such a test, and the tests were never repeated; recall counts as eidetic only without mnemonics or other strategies; none of the best competitors at the World Memory Championships has claimed a photographic memory. Counts: a 1,000 ms snapshot of 4, 10 and 20 tiles gives 250, 100 and 50 ms a tile; a climb from 4 tiles adding 2 a board reaches 24 on its 11th board. No span, average or age figure is printed. Licence: own work
How it works
This photographic memory test lights a pattern of tiles for one second and then hides it. Tap back the tiles that were lit, in any order. Each cleared board adds two tiles, up to 24. It is a visual recall game: it cannot show whether you have a photographic memory.
Read the full guide
Snapshot first, then study
Press Start for the one-second snapshot. A dark tile is a miss, three misses lose the board, and three lost boards end the run. Then pick Ten-second study under Round and compare the two scores. The wait rounds lock the grid for 10 or 30 seconds after the study, so you can see what is left once the picture has gone.
Before you press Start, rest your eyes on the middle of the grid, so a one-second flash lands in a single view.
Questions and answers
Can this test tell me if I have a photographic memory?
No. It measures how big a tile pattern you can rebuild on this screen today. Photographic memory in the popular sense, recalling a full page after one look, has never been shown to exist, and no online game can confirm it.
What is the difference between eidetic and photographic memory?
The two words are often used as one. When they are told apart, eidetic memory means still seeing a picture for a few minutes after it is gone, and photographic memory means recalling pages of text or numbers in detail after one look.
Why are there wait rounds?
An eidetic image is described as fading within minutes of the picture being removed. The 10- and 30-second waits show how much of a pattern you keep once it is gone, which is the part a real snapshot would hold.