An ordinary conflict at the chessboard that escalated into a deadly fight. A duel between Nicholas Albert, a boy who spends almost all his free time playing chess with a computer, and Julio Omedas, an international chess player and psychologist. Fight in the endless logical labyrinths of the great game. A competition in which Nicholas Albert tries to impose his own rules of the game. From an early age, it is pleasant for him to see others suffer, and it is even more pleasant for him to make others suffer. After all, he is the true descendant of Cain. International bestseller from Ignacio García-Valino.