Chess Openings: Opening Principles and 8 Popular Systems

An opening is the first 10-15 moves of a game, and the goal isn't memorizing variations — it's three simple principles: control the center, develop your pieces, and keep your king safe. Named openings (Italian, Sicilian, French) are just concrete ways of applying those principles, refined by generations of players as especially effective.

In short: you don't need to memorize openings to start a game well — the three principles from how to win at chess are enough. The named openings below show what those principles look like in practice for both sides. Try each one on the live board.

Try popular openings live

Each preset plays out the first book moves of the opening and explains what problem it solves for the opponent.

A quick guide to 8 popular openings

• Italian Game (1.e4 e5 2.Nf3 Nc6 3.Bc4): fast development with the bishop aiming straight at f7, Black's weakest point at the start of the game. A great first opening for White — simple plans, clear goals.
• Sicilian Defense (1.e4 c5): the most common reply to 1.e4 at high levels. Black fights for the center asymmetrically, banking on counterplay on the queenside later.
• French Defense (1.e4 e6): Black gives up some central space in exchange for a solid pawn structure that's hard to break.
• Caro-Kann Defense (1.e4 c6): a similar idea to the French, but without locking in the light-squared bishop — at the cost of one extra tempo.
• Queen's Gambit (1.d4 d5 2.c4): White offers the c4 pawn to gain full control of the center if Black captures it. A classic example of what a gambit actually is.
• Scandinavian Defense (1.e4 d5): the simplest reply to 1.e4 to remember — Black immediately trades pawns in the center.
• Ruy Lopez (1.e4 e5 2.Nf3 Nc6 3.Bb5): one of the oldest and still most popular openings at the top level — the bishop on b5 puts long-term pressure on the c6 knight.
• London System (1.d4 and Bf4): a universal plan for White independent of Black's reply — the same development scheme works almost every time, making it a popular choice for a first repertoire.

Nine more openings with full pages

The opening trainer in the app covers 16 repertoires in total — besides the eight above, these also have their own page: Slav Defense, Scotch Game, Vienna Game, Four Knights Game, Petrov Defense, Philidor Defense, Pirc Defense, Alekhine's Defense, and Modern Defense.

Open, semi-open, or closed?

Openings starting with 1.e4 e5 are called open games — the center trades quickly and play tends to be sharper and more tactical. When Black replies with something other than e5 (as in the Sicilian or French), it's called a semi-open game. Openings starting with 1.d4 d5 (like the Queen's Gambit) are closed games — the center stays locked longer and plans are more positional than tactical. No type is "better" — they just suit different playing styles.

Honestly, about this page's scope

This is an overview of the principles and a board to experiment with the first moves of eight openings. For the Italian Game we already have a separate, deeper page with concrete lines and plans; the other openings will get their own pages over time — for now their full repertoire (with branches and typical opponent mistakes) lives in the opening trainer inside the app. You can already practice these same principles in a game against the computer at any difficulty level.

Before playing your first opening, make sure you know the 5 rules that win most games — the openings on this page are just concrete examples of those rules in action. The "Openings" chapter of the chess course walks through them step by step, with a task to complete in every lesson.

The course works offline after your first online visit on this device. No app installation required.