(Play According to the Rules!). The book is intended for arbiters and organizers of tournaments, however it is also usefull for players of all levels. It is divided into three parts: 1) the official chess rules approved by the Russian Federation in 2017, which fully comply with the international rules of FIDE. 2) an explanation of the main functions of the Swiss-Manager program, practical recommendations are given regarding its use in the organization of chess competitions. 3) The third part of the book is interesting: a test of knowledge and correct interpretation of the current rules of chess with 200 questions and their explanation. The author is an international arbiter, he has been dealing with the interpretation of the rules for a long time. 3 pictures.