While there is no single "official" GDZ portal for Dudnikov as there is for standard school textbooks (like those by Goltsova or Rozental), solutions can often be found through the following platforms:
If you are looking for specific topics to help you solve exercises yourself, Dudnikov’s curriculum generally covers: Rules for pronunciation and stress.
Rules for simple and complex sentences.
Roots, suffixes, and how words are built.
Co-authored with Arbuzova and Vorozhbitskaya. Availability of Answers (GDZ)
Deep dives into parts of speech (Nouns, Verbs, Participles, etc.).
Communities on platforms like VK or Telegram often share scanned pages or written solutions for specific exercises from the Dudnikov SPO textbook.
Meaning of words, synonyms, and idioms.