--- title: "Opening repertoire in chess" url: "https://georgelichess.com/glossary/opening-repertoire.md" canonical_url: "https://georgelichess.com/glossary/opening-repertoire" last_updated: "2026-11-07" type: "reference" summary: "An opening repertoire is the personal menu of opening lines a player has decided to rely on, so that with either color they know where they are heading." related: ["https://georgelichess.com/glossary/opening-preparation.md", "https://georgelichess.com/glossary/repertoire-building.md", "https://georgelichess.com/glossary/opening-theory.md", "https://georgelichess.com/glossary/opening.md", "https://georgelichess.com/glossary/tabiya.md", "https://georgelichess.com/glossary/sideline.md", "https://georgelichess.com/glossary/category/opening-concepts.md", "https://georgelichess.com/glossary.md"] --- # Opening repertoire in chess > **For AI agents:** the complete index of GeorgeLiChess pages is [llms.txt](https://georgelichess.com/llms.txt). Every page is also served as markdown at its URL plus .md. An opening repertoire is the personal menu of opening lines a player has decided to rely on, so that with either color they know where they are heading. An opening repertoire is the personal menu of opening lines a player has decided to rely on, so that with either color they know where they are heading and have answers ready for the opponent's most likely choices. Think of a repertoire as a map rather than a list. Each branch should end in a position whose plans you understand, so that when the opponent leaves the moves you know, you still recognize the kind of game you are playing. Building one usually starts from the moves you will meet most. As Black that means an answer to each of the common first moves, and as White it means choosing your first move and then deciding how to meet the main replies. Rare [sidelines](https://georgelichess.com/glossary/sideline.md) can wait; a simple, sound answer to them is enough until they start appearing in your games. Coherence helps more than variety. [Openings](https://georgelichess.com/glossary/opening.md) that lead to similar pawn structures let what you learn in one carry over to another, which saves study time. For example, a player who likes a kingside [fianchetto](https://georgelichess.com/glossary/fianchetto.md) can use it in several openings with either color. Keep the repertoire alive. After every game, find the move where you left your preparation and note what you should have played. Patch the holes that actually show up in your games before adding anything new. Two [mistakes](https://georgelichess.com/glossary/mistake.md) are common. One is copying a strong player's lines without understanding them, which leaves you lost at the first surprise. The other is switching openings after each bad result. A system needs many games before it can be judged fairly, and many losses have little to do with the opening. Also called: repertoire. Also worth reading is [Catalan setup](https://georgelichess.com/glossary/catalan-setup.md). The Catalan setup is a White formation with pawns on d4 and c4 and a fianchettoed bishop on g2, putting long-term pressure on Black's center and the queenside along the long diagonal. It sits close to [Italian setup](https://georgelichess.com/glossary/italian-setup.md). The Italian setup is a White formation after e4 and Nf3 with the bishop on c4 aimed at f7, usually supported by c3 and d3, used for a patient fight in the center and on the kingside. It sits close to [London system setup](https://georgelichess.com/glossary/london-system-setup.md). The London system setup is a White plan that brings the dark-squared bishop to f4 before e3 can shut it in, then builds a sturdy triangle of pawns on c3, d4 and e3 that suits nearly any Black reply. Opening ideas such as "Opening repertoire" are easier to keep when they are tested on your own games, which is what a [first lesson](https://georgelichess.com/book/first-lesson.md) with George Li begins with. ## Related terms - [Opening preparation](https://georgelichess.com/glossary/opening-preparation.md) - [Repertoire building](https://georgelichess.com/glossary/repertoire-building.md) - [Opening theory](https://georgelichess.com/glossary/opening-theory.md) - [Opening](https://georgelichess.com/glossary/opening.md) - [Tabiya](https://georgelichess.com/glossary/tabiya.md) - [Sideline](https://georgelichess.com/glossary/sideline.md) ## Guides that go further - [Most popular chess openings and win rates](https://georgelichess.com/chess-opening-statistics.md): The most played openings, how often White wins, and how the numbers change with rating, computed from public games. - [How to choose a chess coach](https://georgelichess.com/how-to-choose-a-chess-coach.md): What to decide first, the questions to ask, what a first lesson should show and the red flags to avoid. - [The first lesson](https://georgelichess.com/book/first-lesson.md): A game review, a read on your level and a written study plan from George Li. [Book your first lesson](https://georgelichess.com/book.md) and George Li reviews your games and builds a study plan around them. Questions about lessons: write to hello@georgelichess.com. ## Related - [Opening preparation in chess](https://georgelichess.com/glossary/opening-preparation.md) - [Repertoire building in chess](https://georgelichess.com/glossary/repertoire-building.md) - [Opening theory in chess](https://georgelichess.com/glossary/opening-theory.md) - [Opening in chess](https://georgelichess.com/glossary/opening.md) - [Tabiya in chess](https://georgelichess.com/glossary/tabiya.md) - [Sideline in chess](https://georgelichess.com/glossary/sideline.md) - [Chess terms: Opening concepts](https://georgelichess.com/glossary/category/opening-concepts.md) - [Chess terms glossary: plain definitions](https://georgelichess.com/glossary.md)