Pi Chain

3.14159265... How far can you carry it?

Pi Chain is a small, focused game about memory and precision, built entirely around the digits of pi.

Two ways to play

Recall Chain — Type each digit of pi from memory, one after another, on a full-size keypad. One wrong digit ends the chain. How far can you get?

Rapid Fire — Pick the correct next digit from four choices before the ring closes. Build a streak before the clock runs out.

Exact, not memorized

The digits aren't hardcoded from memory — they're computed live in your browser using Machin's formula, so every digit you see is mathematically exact, not transcribed.

Runs entirely in the browser, on phone or desktop. No download, no install.

Your best scores are saved on your device, so you always have something to beat.

If you enjoy it, a tip is always appreciated — but never required.