Demo note. This note demonstrates what the SciDraft Hugo theme can do for academic and scientific publishing — for research institutions, researchers and students. Its content is demonstration material only: readers should ignore whether the demo content is correct. Chain-of-thought prompting began as a single sentence appended to a prompt and is now a family of strategies that differ in what they add: a fixed reasoning skeleton, several sampled chains and a vote, demonstrations the method writes for itself, or calls to an external tool in the middle of the reasoning. This survey groups the entries in its bibliography by that question, following the framing of the earlier survey of prompting strategies \cite{Yu2023-qr}, and asks in each group what the reported gain is actually attributed to. ...