(The Opawskie Mountains Cup in 1991-2020 on the Polish-Czech border). History of 30 international tournaments played in the Gory Opawskie (Opawskie Mountains) in 1991-2020, namely in the municipalities of Glucholazy 1991-2001, Jarnoltowek 2002-2005 and Pokrzywna 2006-2020. The book contains a history of all tournaments, together 132 annotated games, 88 fragments of games, crosstables and detailed results of individual tournaments, all accompanied by 114 photographs. At the end, an overview of the winners of individual tournaments and a list of all players who participated in the tournaments during 30 years. The book is in Polish, but the preface is also in Czech.