(Collection of Chess Problems. Gennady Kozyura and Valery Kopyl 2003-2020. Part 1). This book contains joint chess compositions by two Ukrainian chess composers, Gennady Kozyura and Valery Kopyl, for the period from 2003 to December 2020. The book is signed by both authors on the title page. The problems are arranged in chronological order and divided into two sections. A total of 656 compositions are collected, of which 114 are Album ones. The authors plan to publish the second part of the collection, which will contain individual problems of each composer