The Queen's Indian Defence is a classical opening, usually valued more for its solid positional foundation than for its fighting potential. IM Deboushnik De's new repertoire keeps that foundation but adds novelties, ambitious ideas and aggressive lines that let Black fight for the initiative. The central idea goes back to Aron Nimzowitsch. His 4...Ba6, aimed straight at the c4-pawn, turns a developing move into a question White has to answer immediately. The repertoire is built around that question, and around a broader principle: Black's setup should be decided by what White has already committed to.