Σ MathFold

An adaptive logic odyssey · 1,000 levels

Solve 1,000 logic challenges.
Reach the secret at the end.

Every challenge is generated on the fly and never repeats — like a digital fingerprint of pure mathematics. Enter your name and begin. No signup, no password, no email.

Using the same name again continues your journey where you left off.

…Players
…Top solver
…Reached the secret
…Wall messages
…Visits

Never the same puzzle

Questions are produced by a cryptographic-style generator keyed to your journey. Refresh all you like — level 217 will still be exactly what you saw.

Adaptive difficulty

Arithmetic grows into sequences, primes, divisors and divisibility as you climb all the way to 1,000.

A secret awaits

Finish the last challenge and a message written for the persistent will be revealed.