Krotov is for advanced students only. If Irodov is a scalpel, Krotov is a sledgehammer. The problems are notoriously long, involving nested physical effects (gravity + electromagnetism + thermodynamics in one problem).
: Hosts massive collections like the Russian Physics Olympiads 2005–2017 and the 2023-2024 Finals Problems . russian physics olympiad problems pdf hot
: Basic conceptual questions often available through Moscow's VOS portal . Krotov is for advanced students only