chertov.org.ua

Read-only access to chertov.org.ua, a Russian-language site publishing worked solutions to the physics problem book by A. G. Chertov and A. A. Vorobyov (Чертов А.Г., Воробьёв А.А.). STRUCTURE. The book is 10 chapters (глава) containing 51 paragraphs (параграф, written §), which contain the problems (задача). A problem is addressed by its paragraph number plus its number within that paragraph, written "P.N" — for example 1.12. Paragraph numbers are unique across the whole book, so a paragraph number alone identifies a section and the chapter is never needed to address a problem. WHAT IS EXPOSED. Only problems that have a published solution. Problems still awaiting one are absent from every result and from every count, so a count returned here is a count of solved problems. SOLUTIONS. Each solution is a scanned worked derivation served as a GIF from the static host https://static1.chertov.org.ua. Those URLs are permanent, public and hotlinkable — link to the image rather than copying it. There is no text transcription of a solution. The problem STATEMENT (the `condition` field) is available as plain Russian text. PAGES. Every problem, paragraph and chapter also has a canonical HTML page on https://www.chertov.org.ua; each result carries its `page_url`. TOOLS. `list_chapters` maps the whole corpus and is the place to start. `list_paragraphs` lists the paragraphs of one chapter or of the book, with solved counts and problem-number ranges. `list_problems` pages through one paragraph. `get_problem` fetches one problem by paragraph + number or by label. `search_problems` searches the Russian problem statements; its query must be at least 5 characters once whitespace is removed, and a shorter one is rejected with a validation error rather than returning an empty result. CALLING. Every tool is read-only, free of side effects and safe to call repeatedly or in parallel. Every result is JSON with English field names; the values are in the source language, which is Russian. A problem that does not exist, or that has no published solution, comes back as a normal result with `found: false` — that is an answer, not a failure to retry.