Moscow Mathematical Olympiads (published by the American Mathematical Society).
When searching for problem collections, it helps to understand the different tiers of the Russian mathematical pipeline. The All-Russian Olympiad (Vseross)
Spend at least 45 minutes trying to solve a problem on blank paper before looking at the solution.
To help tailor your preparation or find the exact resources you need, it would be useful to know a bit more about your current focus.
Russian combinatorics is legendary for its difficulty. Common themes include:
Finding the most current competition problems requires a slightly different approach, as they are not immediately published in collected PDF books. However, you can find them through:
Combinatorics in the Russian tradition is famously difficult. It rarely involves simple counting permutations. Instead, it focuses on:
Russian problems rarely require tedious calculations. Instead, they demand creative breakthroughs, clever insights, and rigorous logic.
The Russian Math Olympiad is legendary for its difficulty. It prioritizes deep, creative logical thinking over rote memorization. Finding high-quality problems and solutions in PDF format is a priority for competitive students worldwide.