The book of the international master Maxim Chetverik is dedicated to the debut experiments undertaken at the board (usually with classical time control) by players in the grandmaster rank. The 50 games given in full and 33 test tasks illustrate unusual ramifications in the full spectrum of chess principles. The study of new and revival of old debut rarities is relevant in connection with the rapid development of the theory. Mastering long options requires remarkable memory and is more suitable for chess professionals. Using examples of the creative creativity of grandmasters, the reader is invited to evaluate the quality of the debut experiment and decide whether it is appropriate to adopt the idea of ​ ​ a titled player.