Writeup index
Two views on the same idea: a short technique primer list, and a harvested archive of CTF challenges that already have published solutions to compare - picoCTF included, where the solution is always the writeup on picoctfsolutions.com.
19,665 challenges from 1,445 events, every one of them with a published solution somebody wrote up (40,137 writeups in total; 9,094 challenges have two or more to compare, which is what the 2+ solutions filter narrows to). Each links to its CTFtime task page - the hub collecting every solution - and to the closest picoCTF challenges on picoctfsolutions.com, so you can watch the same technique taught twice by different people. Every challenge appears once: where CTFtime split one across several task pages, 342 of them, the pages are grouped under a single entry. picoCTF is the exception to all of that: its 513 challenges skip CTFtime entirely and link to their writeup on picoctfsolutions.com.
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