Building a Solid Opening Repertoire

Openings are the most over-studied and least understood part of chess. Many players spend hours memorising long lines and still feel lost by move 12. A good repertoire is not about knowing the most moves. It is about understanding the positions you reach, so that you know what to do when your opponent leaves the book.

First, the opening principles

Before any specific opening, every player should follow these principles until they become automatic:

1. Fight for the centre with pawns (e4, d4) and pieces.
2. Develop your pieces: knights and bishops first, usually knights before bishops.
3. Castle early to make your king safe and connect your rooks.
4. Don’t move the same piece twice in the opening without a good reason.
5. Don’t bring your queen out too early, where it can be chased with tempo.
6. Connect your rooks and put them on central or open files.

If you follow these principles, you will reach a playable middlegame against almost anything, even without knowing the theory.

Choose openings that match your style

There is no “best” opening, only openings that suit you. Ask yourself:

• Do I enjoy sharp, tactical positions where both kings are under attack?
• Or do I prefer calm, strategic positions where I can outmanoeuvre my opponent slowly?

Your style	As White, consider	As Black vs 1.e4	As Black vs 1.d4
Open, tactical	1.e4 with the Italian Game	1…e5 or the Sicilian	King’s Indian Defence
Solid, strategic	1.d4 with the Queen’s Gambit, or the London System	Caro-Kann Defence	Queen’s Gambit Declined or the Slav
Flexible	1.Nf3 or the English Opening	French Defence	Nimzo-Indian Defence

A repertoire by level

Beginners (up to about 1000): play open positions where tactics and principles matter most. 1.e4 e5 positions such as the Italian Game teach development, centre control and king safety better than anything else.

Improving players (about 1000–1600): pick one reply to 1.e4 and one to 1.d4, and stay with them. Learn the main ideas and the typical middlegame plans, about 6–10 moves deep. Switching openings every month is the most common reason players stop improving.

Tournament players (1600+): deepen your lines, prepare against the openings your regular opponents play, and keep a personal opening file with the lines you have analysed.

How to study an opening the right way

1. Learn the ideas first. For each opening, write down in one sentence the main plan for each side, and the typical pawn breaks.
2. Play through 10–20 model games by strong players in your opening. You will absorb the typical plans, piece placements and endgames.
3. Learn the critical tricks and traps in your lines, for both sides, so you don’t lose in 15 moves.
4. Play it in practice games, then check your games afterwards. Where did you leave the book? What should you have played?
5. Keep a repertoire file (a Lichess study works well) and add to it after every game.

Common opening mistakes

• Memorising without understanding. When your opponent plays a different move, the memorised line is useless. The ideas still help.
• Grabbing pawns while undeveloped. A pawn is rarely worth three tempi.
• Copying a world champion’s repertoire. Their openings depend on deep preparation. Choose openings you can understand.
• Ignoring the endgame. Many openings lead to typical endgames. Knowing them makes your opening choice much stronger.

Where to explore

• The Lichess Opening Explorer shows what masters and club players actually play in any position.
• Our Resources page has a quick guide to the most popular openings, with their main ideas.

A good repertoire grows with you. Start simple, understand the ideas, and add depth only when your games show you need it.