PuzzlesComing soon
Daily puzzles
One small puzzle a day, the same for everyone. Solve it, see where you landed on today's leaderboard, and come back tomorrow.
Find the bottleneck
A small system is struggling. Tap the one part that gives out first.
Example: Users → load balancer → two app servers → one database at 95% CPU. Checkout takes 9 seconds.
- One a day
- New at midnight in your time zone. Yesterday's stays open to practise.
- A few tries
- Each wrong try shows a clue, so you learn something either way.
- Daily leaderboard
- Fewer tries and a faster solve rank higher. It resets every day; joining is your choice.
Puzzles are on the way
The visual labs are the closest thing today: a design, a set of checks, and a reason for every result.