In the XX century, the development of chess art continues. A number of new directions appear, content is enriched, technical skill is improved, the geography of composition is expanding, etc. The book examines a period that covers almost the entire first half of the 20th century. The first part of the book provides a description of the main problem schools and trends that developed in the pre-war period. To characterize them, only the most typical examples are given without going into details that require special knowledge from the reader. The second part is devoted to an overview of the development of problem composition in specific countries.
