THE CHALLENGE LIBRARY

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Challenge 04 / Season 2Open now

Current challenge · Data cleanup

The Welcome Desk

Scanners retry. Some check-ins are rejected. Work out who arrived first, which room was busiest, and how many kits are still waiting.

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PREVIOUS WEEKS

Past challenges.

Open a title to visit its original community thread. Earlier participation windows are closed.

The Hour That Happened Twice
Comparing a rail night across changing clocks.
Season 1 · Challenge 03 · Closed
Photo Finish
Filtering, grouping, and sorting race records.
Season 1 · Challenge 02 · Closed
The Night Gate
A connected trail through three datasets.
Season 1 · Challenge 01 · Closed
The community pilot
The first weekly automation challenge.
Season 1 · Challenge 00 · Closed