Memory Grid
Watch the sequence light up. Repeat it back perfectly. Each level adds one more tile.
Memory Grid
Watch the tiles light up. Repeat the sequence back. Each level adds one more tile. Use mouse, touch, or keyboard shortcuts.
3x3 grid until level 9, then 4x4. Shortcuts: 1-9, then Q W E R A S D.
About working memory and the Memory Grid
In 1956, psychologist George Miller published "The Magical Number Seven, Plus or Minus Two" — one of the most cited papers in cognitive psychology. Miller demonstrated that the average human can hold 7 ± 2 items in working memory at once. This fundamental constraint shapes everything from how we read to how we solve problems to how much we can keep track of during complex tasks.
Working memory is distinct from long-term memory. It's the mental workspace you use when you're actively thinking — holding a phone number while you dial it, keeping track of multiple points in a conversation, or monitoring several variables while solving a problem. Unlike long-term memory, working memory is strongly correlated with fluid intelligence, processing speed, and academic and professional performance.
Memory Grid starts at a 3×3 grid with sequences of increasing length. At sequence length 9, it expands to a 4×4 grid for an additional challenge layer. The game is pure working memory — no tricks, no strategy. Just how many items can you hold and reproduce? Average adults max out around 7-9 items. Elite performers in memory sport competitions can reach 15-20 through specific training techniques.
Read more: Working memory — what it is and how to improve it →