The subject of the book is a new methodology for calculation of variants, concentration of attention and an overview on the board. Three levels of difficulty focus on players of various strength, from pre-intermediate to advanced ones. The book contains 500 samples. Konstantin Chernyshov is strong GM, who has also long worked as a coach. The book has been also published in Russian with title Tayny videnia shakhmatnoi doski i rascheta variantov.