Echo: How Long a Sequence Can You Hold? 🔊
Published: August 10, 2026 · 4 min read
Echo is Simon, essentially: tiles light up in a sequence, you repeat it, and each round adds one more step. It is also a fair approximation of the digit-span tasks psychologists use to probe working memory, which makes the point where you fail genuinely interesting.
The rules
Tiles flash in a sequence. Tap them back in the same order. Get it right and the next round adds a step. Get it wrong and the run ends.
Chunking: how to get past 7
You will not brute-force your way past about seven steps by trying harder. What works is chunking — recoding several items as one.
Three approaches, in rough order of how well they hold up:
Spatial shapes. Don't remember "top-left, top-right, bottom-right" — remember a shape. An L, a zigzag, a clockwise sweep. Three items become one, and a nine-step sequence becomes three shapes.
Rhythm. Group the sequence into beats: dum-dum-DUM, dum-DUM. Motor and auditory memory are separate from visual working memory, so this gives you a second channel rather than crowding the first.
Naming. Assign each tile a syllable and hold the sequence as a nonsense word. Effective, but it collapses fastest under pressure.
The reason chunking works isn't that your capacity grows — it's that capacity is measured in chunks, and you get to decide how big a chunk is.
Why everyone stalls around the same place
Most people fail somewhere between 7 and 10 steps, and that's not a coincidence — it's roughly where estimates of short-term memory span land. Miller's famous "seven, plus or minus two" from 1956 is the version everybody's heard; later work suggests the number for genuinely unchunkable items is closer to four.
Which is another way of saying: if you're getting past ten, you are definitely chunking, whether or not you noticed doing it.
About our version
The grid grows from 3×3 to 4×4 as you climb, which stops the sequence turning into pure muscle memory. Best runs are kept on your device.
It runs in your browser, works offline once loaded, needs no account, and costs nothing.
Questions people actually ask
What's a good score in a memory sequence game?
Most people stall between 7 and 10 steps. Getting past 12 reliably means you've found a chunking strategy, whether or not you set out to.
How do I remember longer sequences?
Group them. Remember three tiles as a shape rather than three positions, or as a rhythm rather than a list. Capacity is measured in chunks, and you control how big a chunk is.
Keep reading
- Reflex: What's Your Reaction Time? ⚡ — Wait for green, tap. Typical is around 250ms, good is under 200, and anything under 120 means you guessed — here's why.
- Brain Training Games: Focus, Memory and Reaction 🧠 — A Schulte table, a Stroop test, a memory sequence, a reaction timer and mental arithmetic — five games built around a number you can try to beat tomorrow.
- Scan 25: The Schulte Table, and How to Get Faster at It 👁️ — Twenty-five numbers, one grid, find them in order. The people who go fast aren't looking harder — they're looking less.
Play Echo now
Growing sequences, growing grids, best runs saved locally. Free, no account.