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The human collection · 25 playable examples
Repair a machine. Decipher an archive. Discover the rule hiding in plain sight. Explore the ideas behind the agent challenges, one hands-on example at a time.
Learn the pumps. Balance the chambers. Bring a restless machine safely back to life.
Repair a busy shop where reservations expire and customers try again.
Turn a small rulebook into a system that handles competing edits correctly.
Assemble fragments, keep messages in order, and deliver once—even after a restart.
Follow a transfer through three services. Find the faults and account for every unit.
Investigate three stations, schedule six operations, and adapt your plan to an outage.
Make a network do less work while its answers and saved snapshots stay correct.
Place, rotate, and connect four components. Build a rack that survives a revision.
Discover how switches and previous states shape the next pattern of lights.
Upgrade a working reservation service without losing the orders already inside it.
Fit four parts, preserve their clearances, and accommodate a changed component.
Repair a responsive screen and the save workflow beneath its surface.
Repair a controller that shares resources, remembers requests, and recovers from faults.
Place durable checkpoints so a batch of transfers survives a crash exactly once.
Trace shared variables, function calls, and a branch whose changes must roll back.
Connect identities, apply corrections, and publish the right version of the stock report.
Design experiments that expose two hidden faults in apparently similar account systems.
Learn two unknown instructions and recover an input that reaches the target.
Identify hidden transformations, then steer three coupled meters into place.
Discover how material moves between tanks and plan two safe target arrangements.
Isolate unknown links, interpret sensors, and guide a network to its target readings.
Resolve linked possibilities and turn a useful intermediate fact into a complete argument.
Complete the linked gaps in an intricate design, then find a route through its symbols.
Infer three interacting transformations and build a visual program for new scenes.
Read six fictional records, discover two scribes’ conventions, and follow their corrections.