The Arena
Hands-on challenges, checked automatically. In π‘ Security challenges, each one is a made-up app with one weakness: you find it, write the fix, and the Arena runs the attack against your own code to prove it holds. Nothing real is ever attacked. In π CAD challenges, you get a real-world brief and design the part in code; the Arena measures it like a machinist would. In π Forensics cases, you unpack made-up practice evidence on your own computer, investigate it with the tools from the forensics course, and report your findings. In π CNC challenges, you write G-code for a job and the simulator checks it would cut cleanly. In π Bug hunt challenges, you fix real bugs found while building this site (see the bug log).
ποΈ This week's challenges
Three fresh picks, one per level. They change every Monday.
Beginner
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Intermediate
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Expert
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π This week's ranking
CAD challenges
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