The Ruy Lopez: Why 1.e4 e5 2.Nf3 Nc6 3.Bb5 Is Still Everyone's Main Weapon

The Ruy Lopez, 1.e4 e5 2.Nf3 Nc6 3.Bb5, is named after a 16th-century Spanish priest who wrote one of the first serious treatises on chess strategy, and it remains, five centuries later, the single most respected way for White to meet the Open Game. It appears constantly at every level from club play to World Championship matches, which for an opening this old is a remarkable thing to still be true.

The point of 3.Bb5 is easy to state and takes longer to fully appreciate: the bishop pins the knight on c6 against the e5 pawn, so if that knight ever moves, e5 falls to Nxe5. That threat isn't usually cashed in immediately — Black has time to deal with it — but it shapes the entire opening. Nearly every Black defence in the Ruy Lopez exists specifically to neutralise or sidestep this pin, and the different defences are really just different answers to the same question: what do I do about my knight on c6?

Black's main reply, 3...a6, is called the Morphy Defense, and it asks White a direct question in return: keep the bishop with 4.Ba4, maintaining the pin, or trade it off with 4.Bxc6. Most main-line theory follows 4.Ba4, after which the game typically continues 4...Nf6 5.O-O Be7 and into one of the deepest, most studied bodies of opening theory in the entire game — the Closed Ruy Lopez, where both sides manoeuvre for space and piece placement over many moves rather than resolving the tension quickly.

The Exchange Variation, 4.Bxc6, takes a completely different approach and is worth knowing as its own thing rather than a footnote: White gives up the bishop pair to double Black's pawns with 4...dxc6. The resulting structure genuinely favours Black's pawn majority on the kingside for the endgame, but White's simpler development and the long-term weakness of doubled c-pawns has made this a serious, sometimes even aggressive try rather than the quiet drawing weapon it's sometimes assumed to be — Bobby Fischer famously used it as a fighting line, not a safe one.

The Berlin Defense, 3...Nf6, deserves its own mention because of how thoroughly it changed elite chess. Rather than defending the pawn or breaking the pin, Black offers a trade: after 4.O-O Nxe4 5.d4, play often heads toward an early queen trade and an endgame that is famously difficult for White to make any real progress against. It became known as the "Berlin Wall" after Vladimir Kramnik used it to neutralise Garry Kasparov's attacking chess in their 2000 World Championship match, and it has been a mainstay at the top level ever since — a reminder that "boring" and "hard to beat" are often the same thing at the highest level, even if it is a less exciting choice for a club player looking for chances to win.

For a player taking up the Ruy Lopez without wanting to absorb decades of main-line theory, the practical route is picking one system and learning its plans rather than memorising forcing lines. The Exchange Variation asks for the least memorisation and gives White a simple, principled plan (fast development, pressure the doubled pawns). The Closed main lines ask for more but reward you with an opening that will serve you at every level you ever reach, because nobody outgrows the Ruy Lopez — it is still what the strongest players in the world play when they want the most thoroughly tested test of Black's Open Game.