In the next book from the series “Practice of chess tactics” offered to the reader, both positions that occurred in real games and training positions on topics: overlap, liberation (fields, lines, etc.) are collected. (e) Opening of lines . At the end of each topic are solutions. In particular, the Polgar sisters believe that chess is 99% composed of tactics. No strategic understanding will replace careful calculation in tactically saturated positions. On the other hand, having only basic knowledge in the field of strategy, but being a good tactician, the player can move very far. From the very beginning, his father offered a series of positions to the little Zhuzhe for an independent solution, and the solution invariably turned out to be tactical. Thousands of positions - that's all . You ask, what is new here? Every chess player at least occasionally tries to find the strongest continuations in positions published in journals. That's right - occasionally . The matter is in quantity! The Polgar sisters had thousands of such exercises at hand and performed them daily. The book will be useful to the chess player of any qualification .