On June 23-25, 2021, the Fifteenth International Conference "Game Theory and Management" (GTM2021), organized by St. Petersburg University in partnership with the International Society of Dynamic Games, will take place. We talked about the benefits of the conference of mathematicians for business and public administration, connection with psychology and game plots of masterpieces of world painting with the co-chairman of the program and organizing committees, Associate Professor of the Department of Operations Management of the Business School, Academic Director of the Master of Corporate Finance program Nikolay Zenkevich.