Working memory
Grid Recall
A spatial working memory drill. A pattern of cells flashes on a 4x4 grid, the grid is masked, and you click the pattern back from memory. Red decoy cells try to sneak into your answer, and the pattern grows while you keep getting rounds right. Twenty rounds, adapting to the span you can hold.
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20 rounds, one pattern each. Two correct rounds grow the pattern by one cell; a miss shrinks it by one, so the drill settles at the size you can hold.
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Sign up →Frequently asked questions
What is Grid Recall?
Grid Recall is a spatial working memory drill. Each round, a pattern of blue cells lights up on a 4x4 grid for about a second, the grid is masked, and you click the cells that were lit, in any order. A session is 20 rounds and takes around 3 to 4 minutes.
What are the red cells?
Red cells are decoys. They light up alongside the blue pattern in about half the rounds, and they must stay out of your answer: clicking a red cell fails the round. They train the filtering side of working memory, holding what matters while ignoring what does not.
Why does the pattern keep growing?
The session is adaptive. Two correct rounds in a row grow the pattern by one cell, and a failed round shrinks it by one. The drill settles at the pattern size you can hold about 70 percent of the time, so feeling stretched is the drill working, not you failing.
What is Sequential mode?
In Sequential mode the pattern arrives one cell at a time instead of flashing all at once, with decoys mixed into the sequence. You have to hold the pattern and extend it as it builds. Sequential spans run lower than whole-pattern spans for everyone; that is the format, not a slump. Sequential mode is available with a premium subscription.
What technique should I use?
Remember the pattern as one shape, such as an L or a diagonal, rather than a list of separate cells. Do not spend attention on the red cells: trying to remember what to avoid uses the same memory you need for the answer. An unclicked blue cell costs one hit; a clicked red cell fails the whole round, so when unsure, favour the cells you are confident about.