The Ruy Lopez is probably the most classical opening in chess. It is named after Ruy López de Segura, a sixteenth-century Spanish priest, and four centuries later it is still in the repertoire of almost every world champion.
1.e4 e5 2.Nf3 Nc6 3.Bb5
The move 3.Bb5 does not threaten to win anything yet: it attacks the knight that defends e5, and with that it starts a pressure that can last the whole game. That is its charm and its difficulty. The Ruy Lopez is not won in the opening: it is won in the middlegame the opening leaves behind.
The idea in one sentence
White pressures Black's centre slowly and indirectly: first against e5, through the c6 knight, and later with the d4 break when everything is ready. Black has to choose between conceding some space and meeting that pressure with more activity.
What each side wants
White:
- Keep the pressure on
e5 and prepare d4 with c3. - The typical manoeuvre
Nbd2-f1-g3, bringing a knight to the kingside. - A space advantage in the centre and, in many lines, a kingside attack.
Black:
- Hold
e5 without becoming passive. - Queenside counterplay with
...b5, ...Na5 and ...c5. - Free the position with
...d5 when it is possible.
The main lines
Exchange Variation: 4.Bxc6
After 3...a6 4.Bxc6 dxc6, White gives up the bishop and aims for the endgame: White's kingside pawn majority is worth more than Black's on the other wing, because the doubled c-pawns cannot create a passed pawn. It is a practical weapon and a popular surprise.
The Steinitz lines
Black supports e5 with ...d6, either at once (3...d6) or after 3...a6 4.Ba4 d6, the Modern Steinitz. It is a solid way to play, with a little less space and a lot of firmness.
Systems with ...g6 and ...f5
Replies off the main road: 3...g6, developing the bishop on g7, and 3...f5, the Schliemann Gambit, which counterattacks immediately. They are good surprise weapons, and worth having prepared if you play the white side.
Open Variation: 5...Nxe4
After 3...a6 4.Ba4 Nf6 5.O-O, Black takes the e4 pawn and looks for active piece play. It is the line for those who prefer activity to solidity.
Berlin Defence: 3...Nf6
The defence Kramnik used to neutralise Kasparov in their 2000 title match. It often leads to an early endgame, the "Berlin Wall", where Black loses the right to castle but keeps a position that is very hard to break.
The main line and its middlegames
With 3...a6 4.Ba4 Nf6 5.O-O Be7 6.Re1 b5 7.Bb3 d6 8.c3 O-O 9.h3 you reach the Closed Ruy Lopez, one of the richest and most studied middlegames in chess. This is where you learn the plans that apply to the whole opening: the knight manoeuvre, the d4 break, the kingside attack against counterplay on the other wing.
Typical mistakes
- Expecting to win
e5 straight away. 4.Bxc6 dxc6 5.Nxe5 does not win a pawn, because Black gets it back with 5...Qd4. The pressure is long-term. - As Black, staying passive. Holding
e5 is not enough; you need queenside counterplay. - Exchanging the
b3 bishop for no reason. It is the piece that eyes f7 and sustains the pressure. - Playing the middlegame from memory. The Ruy Lopez is won by understanding structures, not by remembering moves.
Who is the Ruy Lopez for?
For players who want a White opening that will last a lifetime. It is demanding —there is a lot of theory—, but every hour invested in it teaches real chess: the centre, manoeuvring, endgames. If you would rather start with something more direct, the Italian Game shares the first moves and is simpler to learn. And to choose sensibly, read which opening suits the way you play.
How to study it
First the plans of the main line, because they come up the most. Then Black's replies one by one, starting with those you meet most at your level. And always complete games: in the Ruy Lopez, the important part starts on move fifteen.
The course Ruy López in Depth: Variants, Systems and Middlegame, with grandmasters Andrés Rodríguez Vila and Diego Flores and International Master Mario Villanueva, covers in six lessons the Exchange Variation, the Steinitz lines, the systems with ...g6 and ...f5, the Open and the Berlin, with two full lessons devoted to the typical middlegames of the main line.