Challenge your limits

A cybersecurity platform for curious minds.

Challenges

Notice

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1 New Administrators Join CodeShell.krCodeShell 2026-09-22 00:52 119 2 CodeShell.kr Round 1 Winner: AACDAICodeShell 2026-09-21 10:23 228 3 CodeShell.kr has been re-registered on WeChall.netCodeShell 2026-09-19 10:16 560

Recent challenges

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1 Template ResidueWEB MEDIUM100 2 External FootnoteWEB HARD200 3 Glass IndexWEB MEDIUM100 4 Margin DirectiveWEB MEDIUM100 5 Print QueueWEB MEDIUM100 6 Directory WhisperWEB EASY50