https://x-nagi.com/tags/plaidctf.htmlRecent content in PlaidCTF on Locus Solus | Nagi's BlogHugoen-USWed, 25 Aug 2021 21:59:22 +0800https://x-nagi.com/post/plaidctf2021.htmlWed, 25 Aug 2021 21:59:22 +0800https://x-nagi.com/post/plaidctf2021.html<p>In PlaidCTF 2021, I solved the challenge <code>The Watness III</code>, then I spent my time on another challenge <code>dr</code>. Unfortunately, the regular expression algorithm in <code>dr</code> is too complex to understand, thus I failed to solve it.</p> <p>There was a similar challenge in PlaidCTF 2020, <code>The Watness II</code>. I solved that last year when I was a member of A*0*E; it was a reverse challenge of a HyperCard game on the m68k platform. I thought that this challenge had the same game logic as the previous one, so I spent some time finding the color logic used in <code>The Watness II</code>. But the result shows that this challenge is different from that one.</p>