Proving a stripped validator is secret-independent, re-implementing its integrity VM and XOR keystream, then taking the uncapped base credit path the 40000 bonus cap was there to hide
Separating 50 decoy case-flips from 29 real substitutions by aligning two files on their lowercased form with difflib
Peeling 1000 nested archive layers by magic byte, using the fact that 7-zip leaves its filename table readable to recover each layer password