Spanish: 5.O-O b5

Before the first move

The Ruy Lopez, or Spanish Game, is one of the most respected openings in chess history. White aims for long-term central control and pressure on Black's structure, while Black uses flexible defenses to fight for counterplay. This specific line explores the Morphy Defense, where Black expands on the queenside to challenge White's light-squared bishop early on.

1. e4White · your move

Push your pawn to e4. This classic opening move claims space in the center, controls the d5-square, and immediately opens pathways for your queen and light-squared bishop to enter the game.

1... e5Black

Black replies e5, the most direct way to challenge White's ambitions. This leads to Open Games where both sides fight for central dominance. Other common tries like the Caro-Kann with c6 or the Scandinavian with d5 lead to very different pawn structures.

Other paths here: f6 (Barnes Defense) · g5 (Borg Defense) · h6 (Carr Defense) · f5 (Duras Gambit)

2. Nf3White · your move

Develop your knight to f3. This is an ideal square for the knight, as it attacks the e5-pawn and prepares for kingside castling. You are following the principle of developing minor pieces toward the center.

Other paths here: Ke2 (Bongcloud Attack) · d4 (Center Game) · c4 (English Opening: The Whale) · Ne2 (King's Pawn Game: Alapin Opening)

2... Nc6Black

Black plays Nc6, the most common defense. You'll have to watch out for sharp alternatives like the Petroff Defense with Nf6 or the Elephant Gambit with d5, but Nc6 remains the gold standard for solid development.

Other paths here: d5 (Elephant Gambit) · Qe7 (Gunderam Defense) · Bc5 (King's Pawn Game: Busch-Gass Gambit) · f6 (King's Pawn Game: Damiano Defense)

3. Bb5White · your move

Slide your bishop to b5. This defines the Ruy Lopez. You aren't just developing; you are indirectly attacking the e5-pawn by pinning or threatening the knight that defends it.

Other paths here: Nxe5 (Irish Gambit) · g3 (King's Knight Opening: Konstantinopolsky) · c4 (King's Pawn Game: Dresden Opening) · b4 (King's Pawn Game: Pachman Wing Gambit)

3... a6Black

Black plays a6, forcing White to make a decision about the bishop. While the Berlin Defense with Nf6 is very popular at the top level, a6 remains the most frequent choice, followed by the Cozio Defense with Nge7 or the Fianchetto with g6.

Other paths here: Bb4 (Ruy Lopez: Alapin Defense) · g5 (Ruy Lopez: Brentano Gambit) · a5 (Ruy Lopez: Bulgarian Variation) · Nge7 (Ruy Lopez: Cozio Defense)

4. Ba4White · your move

Retreat your bishop to a4. You maintain the pressure on the knight while keeping your bishop on the board. This preserve the 'Spanish Bishop' which is often your most important attacking piece in this opening.

Other paths here: Bxc6 (Ruy Lopez: Exchange Variation) · Bc4 (Spanish: 3...a6 4.Bc4)

4... Nf6Black

Black plays Nf6, continuing development and eyeing the e4-pawn. You might also see the Classical Defense with Bc5 or the Bird's Defense with Nd4, but developing the knight is the most robust path toward the middlegame.

Other paths here: Nd4 (Ruy Lopez: Bird's Defense Deferred) · Bb4 (Ruy Lopez: Morphy Defense, Alapin's Defense Deferred) · b5 (Ruy Lopez: Morphy Defense, Caro Variation) · Bc5 (Ruy Lopez: Morphy Defense, Classical Defense Deferred)

5. O-OWhite · your move

Castle kingside now. This tucks your king away to safety and brings your rook closer to the center. In the Spanish, the rook often moves to e1 later to support the e4-pawn.

Other paths here: d3 (Ruy Lopez: Morphy Defense, Anderssen Variation) · Bxc6 (Ruy Lopez: Morphy Defense, Bayreuth Variation) · c3 (Ruy Lopez: Morphy Defense, Jaffe Gambit) · d4 (Ruy Lopez: Morphy Defense, Mackenzie Variation)

5... b5Black

Black plays b5, kicking the bishop and expanding on the queenside. This is a critical moment. Instead of b5, you could have tried the Open variation with Nxe4 or the solid d6, but b5 is the hallmark of the main line Spanish.

Other paths here: g6 (Ruy Lopez: Brix Variation) · d5 (Ruy Lopez: Central Countergambit) · Bc5 (Ruy Lopez: Morphy Defense, Neo-Arkhangelsk Variation) · d6 (Ruy Lopez: Morphy Defense, Steinitz Deferred)

Where you stand

The opening has reached a classic Spanish structure. White will likely retreat the bishop to b3 and prepare a central strike with c3 and d4. Black has successfully expanded on the queenside and will look to castle and challenge the center, often by placing a bishop on b7 or e7. Both sides have a wealth of strategic plans in this rich and deeply studied position.

• a4-b3 Secure the bishop on the b3-f7 diagonal
• c2-c3 Prepare d4 to challenge the center
• c8-b7 Develop the bishop to the long diagonal
• f8-e7 Prepare to castle and connect the rooks