(Under water. 33 chapters on the mysteries of chess). The book is intended for intermediate and stronger players. In 33 separate chapters, author tells about various aspects of the game. He presents the method, how he himself understands chess and how to solve strategic and other problems. Material is divided into 7 thematic sections: 1. Understanding of chess, 2. Chess Pieces, 3. Time in chess, 4. Openings, 5. Decision-making, 6. Computers, 7. Beauty of chess. Jan Markos, born. 1985, is for many years one of the best Slovak chess players, or the best one. First edition was in autmun 2016 and was sold out very quickly. This reprint is from January 2017 and includes corrections of mistakes made in the 1st edition.