This book constitutes the proceedings of the 19th Russian Conference on Artificial Intelligence, RCAI 2021, held in Moscow, Russia, in October 2021.

The 19 full papers and 7 short papers presented in this volume were carefully reviewed and selected from 80 submissions. The conference deals with a wide range of topics, categorized into the following topical headings:

cognitive research

data mining, machine learning, classification

knowledge engineering

multi-agent systems and robotics

natural language processing

fuzzy models and soft computer

intelligent systems

tools for designing intelligent systems