What makes an opening advanced?
There is no official list of “advanced” openings. In practice, people use the word for openings that demand more of the player. Usually one or more of these is true:
- Deep theory. Critical lines have been analyzed for many moves, and one inaccurate move can lose quickly.
- Subtle strategy. The right plan depends on pawn structure and piece placement rather than a memorized sequence.
- Move-order tricks. The same position can arise by several routes, so you must know what each route allows your opponent.
- Sharp imbalance. Both sides are racing in different directions, and tactics decide the game.
An opening can be advanced in one way but easy in another. A quiet system may have little theory but ask a lot of positional understanding.
Know the principles first
Advanced openings don’t replace the basics, they depend on them. The core principles still apply:
- Fight for the center with pawns and pieces.
- Develop knights and bishops before moving the same piece twice.
- Castle to protect the king and connect the rooks.
- Avoid early queen adventures.
Strong players break these rules sometimes, but only when they can calculate why it works, a skill built through chess visualization training. If you are still learning the first step, read about the first pawn move in chess before returning here.
Families of advanced openings
1.e4 openings
- Open Sicilian. After 1.e4 c5 2.Nf3 and 3.d4, there are many systems such as the Najdorf, Dragon and Scheveningen. See our Sicilian Defence guide.
- Ruy Lopez. Lines like the Closed Ruy Lopez, Marshall Attack and Berlin Defence ask for deep strategic understanding. See the Spanish Defence (Ruy Lopez) article.
- Italian Game with c3 and d4, or Evans Gambit. Classical, but modern players have found plenty of subtle ideas. See the Italian Game.
1.d4 openings
- King’s Indian Defence (1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6). Black lets White build a big center, then attacks it.
- Grunfeld Defence (1.d4 Nf6 2.c4 g6 3.Nc3 d5). Black strikes at the center at once.
- Nimzo-Indian Defence (1.d4 Nf6 2.c4 e6 3.Nc3 Bb4). A flexible, respected defence that fights for e4 with pieces.
- Queen’s Gambit and the Catalan. Lines of the Queen’s Gambit (1.d4 d5 2.c4) and the Catalan (1.d4 Nf6 2.c4 e6 3.g3) lead to strategic battles with long-term pressure.
Flank openings
The English Opening (1.c4) and the Reti (1.Nf3) can transpose to many structures. They are flexible but need care with move order.
What is the most complex opening?
It depends on what “complex” means, and the answer is subjective. Candidates often mentioned include the Najdorf Sicilian, for its mix of theory and tactics, and the King’s Indian Defence and Grunfeld for their strategic richness. If you mean most theory, the Open Sicilian and the Ruy Lopez are strong contenders. Any opening you don’t understand can feel complex, so choose by style rather than by reputation.
Building a repertoire
A repertoire is a set of openings you know well enough to play as White, and as Black against 1.e4 and 1.d4. Some tips:
- Choose by style. Do you like open tactics or slow maneuvering? Pick lines that fit.
- Keep it small. One system against each major first move is plenty to start.
- Learn ideas, not only moves. Know the typical pawn breaks, piece squares and plans.
- Review your own games. Your mistakes show which lines to study next.
Move orders and transpositions
Many openings reach the same position through different move orders. For example, a game that starts 1.Nf3 can transpose into a d4 or c4 opening. Advanced players use this to avoid lines they dislike, or to steer the opponent into unfamiliar territory. Check what alternatives your opponent has at each move, because a choice that looks the same can open a different set of sidelines.
How to study openings
- Start with model games from strong players in your chosen lines.
- Use an opening explorer or database to see the most common replies and results.
- Practice the positions you reach, and with puzzles built from them (see the best tactics for chess for the patterns to look for), to make the ideas stick.
- Only memorize deep lines after you understand the plans behind them.
The 40-40-20 rule
You may see the 40-40-20 rule in search suggestions. It is not a standard, officially defined chess rule. Different sources use it as a loose heuristic for how to divide study or time, so treat it with caution. A balanced training plan usually includes tactics, endgames, opening understanding and playing and reviewing real games.