This book is written on the basis of special methodological developments of the authors and is designed to give the reader the necessary and sufficient theoretical training both for independent development of the poker game and for further improvement of his poker skills. Playing poker requires three types of intellectual efforts from the player - logical, analytical and psychological, and the role of the latter two is significantly greater. It is the analytical component of poker that this book is mainly devoted to. Working on it, the authors aimed to provide the reader with the opportunity to independently master the basics of a successful game of Texas Hold'em - the most popular type of poker. Nevertheless, it is assumed that the initial acquaintance of the reader with poker has already occurred, and he knows the rules of the game in general and Texas Hold'em in particular.