Chapter 1 · Keepers and first signs
Read the first movement
Learn how motion, order, and one impossible body shape name the core idea.

Picture path
- Gigabyte lands and raised ripples spread ring by ring. What traversal is moving?Follow the frontier: an entire ring finishes before the next ring begins.
- Badger digs one tunnel to the bottom while side tunnels wait in darkness. What is he doing?Track one branch from entrance to dead end, then notice where he must return.
- Every jar already stands from smallest to largest and nobody is grabbing one. What does that order say?Look for a complete ordered run, then check whether a hand has removed the best item.
- Dex has an enormous head and checks an earlier solved jar before its cached result returns to the waiting caller’s jar. What is reused?Only the head is enlarged: it marks the top-down, memory-first direction.