Réti Opening

The Réti (1.Nf3) is the most flexible first move in chess. White develops without committing to a pawn structure - the c-pawn, d-pawn, e-pawn and g-pawn are all still candidates. Named after Richard Réti, the Czech hypermodernist who used it to beat Capablanca in 1924 (breaking Capa's eight-year undefeated streak), the Réti is the modern grandmaster's tool of choice for maximum opening flexibility. Carlsen plays it constantly.

Main line: Réti vs ...d5

After 1...d5, White's most ambitious reply is 2.c4 - the classical Réti. Black must decide: accept the c-pawn (2...dxc4), defend it (2...c6 or 2...e6), or push (2...d4). The position becomes a fluid King's Indian Attack / Catalan / English hybrid, depending on what Black does next. White's flexibility lets them respond to any Black setup with a tailored plan.

Variations

King's Indian Attack (1...d5 2.g3)

White plays a King's Indian setup with reversed colours - g3, Bg2, O-O, d3, Nbd2, e4 (eventually). The KIA gives White a fianchetto attack on the kingside while letting Black overcommit in the centre. Bobby Fischer made it a famous weapon in the 1960s. Less theoretical than the classical Réti and a great tool against any Black defence.

Réti vs Symmetric (1...Nf6)

Black mirrors. The game often transposes to the English Opening or a fianchetto-vs-fianchetto setup. Both sides play similar moves and the small tempo edge becomes decisive at high levels. At club level, the game is essentially a draw with imagination from one side.

Réti vs ...c5

Black plays a Sicilian-style setup. White can transpose into the English (2.c4) or play a Sicilian Reversed (2.e4 - actually now it's a Sicilian where White is Black). The Réti's strength is letting White pick whichever structure is most uncomfortable for the opponent.

Common traps

Don't lose to a quick centre push: as White, if you let Black play ...e5 unchallenged with pieces backing it up, the centre becomes Black's. The Réti relies on hypermodern principles - if Black is allowed to occupy the centre with pawns and back them up with pieces, the hypermodern bet fails.

Watch the long diagonal: with Bg2 fianchettoed, the a8-h1 diagonal points at Black's queenside. Any time Black has loose pieces on c6 or b7, tactical shots from Bxc6 or e4 breaks can win material.

Typical plans for White

The Réti is fundamentally a queenside opening. White plays c4 (or skips it), fianchettoes the king's bishop, castles, and then expands on the queenside with b3, Bb2, and a4. The plan against Black's centre is undermining: provoke ...c6 or ...e6 with c4, then break with d4 or e4 at the right moment. The Réti is for players who like multi-purpose moves and dislike forced theoretical lines.

If you want a flexible 1.Nf3 weapon that lets you play almost any structure, the Réti is the right choice. The drills below cover the classical Réti, KIA, and the major Black responses.