Back to the future! Far from a dusty relic once played by great masters such as Rubinstein, Pillsbury, and Bogolyubov, the Zukertort System now enjoys new life. Modern world-class players such as Artur Yusupov, Teimour Radjabov, and Lázaro Bruzón have come to appreciate the Zukertort's rich potential and play it with confidence against strong opposition. The Zukertort System is a fully viable, dynamic 21st-century opening. Often considered a variation of the better-known Colle System, the Zukertort stands proudly on its own, offering White chances to launch a sharp kingside attack or to work up a slow squeeze on the queenside. In this monograph by Zukertort practitioner IM Grigory Bogdanovich, players of the white pieces will discover how to build on the assets of their position, while players of Black will learn how to defend their territory. All along, the reader is treated to a positional manual on fundamental themes such as hanging pawns, the isolated queen's pawn, and sacrifices to open lines for attack.