To understand why these PDFs are sought after, look at the difference in style. Western problems often test "Which formula fits?" Russian problems test "What is actually happening here?"
To use these resources effectively, consider the following approach: Russian Physics Olympiads 2005-2017 1 3 1 | PDF - Scribd russian physics olympiad problems pdf upd
While technically a problem book, the difficulty level of problems in Problems in General Physics by I.E. Irodov is similar to Russian Olympiad training. To understand why these PDFs are sought after,
This is the official state-sponsored competition. It consists of four distinct stages: This is the official state-sponsored competition
(e.g., Grade 9 vs. Grade 11), let me know so I can find the exact PDF link for you. Would you also like to see for a particular topic like mechanics or electromagnetism?
Websites like Physicscup.com and specialized academic wikis periodically upload comprehensive, clean PDFs with modern LaTeX formatting and corrected errata.