Ruy Lopez: Bulgarian Variation

Before the first move

The Ruy Lopez is one of the oldest and most respected openings in chess. While White aims to control the center and pressure the e5-pawn by pinning the knight, the Bulgarian Variation introduces an early a5 push for Black. This rare sideline seeks to gain space on the queenside and disrupt White's typical light-squared bishop maneuvers.

1. e4White · your move

Push your pawn to e4. This classic opening move claims the center and immediately opens lines for your queen and light-squared bishop. You are establishing a presence in the heart of the board while preparing to develop your kingside pieces rapidly.

1... e5Black

Black replies with e5, entering the Open Game. While this is the most principled response, players sometimes experiment with the Duras Gambit or the hypermodern Barnes Defense. By playing e5, you ensure an equal share of central space and prepare to develop your minor pieces.

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 the most natural and strongest continuation, attacking the e5-pawn and preparing for kingside castling. You are forcing Black to defend their central pawn while bringing your piece to its most active square.

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

2... Nc6Black

Black defends with Nc6, the main line of the King's Knight Opening. Other options like the Petroff Defense or the Elephant Gambit lead to very different types of games, but this move keeps the most options open for a complex strategic struggle.

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 to initiate the Ruy Lopez. You are pinning the knight that defends e5, indirectly increasing the pressure on Black's center. This move sets the stage for a deep, long-term battle over central control and piece activity.

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... a5Black

Black surprises with a5, the Bulgarian Variation. Instead of the standard a6 or the Berlin Defense with Nf6, you are choosing a line that focuses on queenside expansion. White must now decide whether to ignore this or react to the potential space gain.

Other paths here: Bb4 (Ruy Lopez: Alapin Defense) · g5 (Ruy Lopez: Brentano Gambit) · Nge7 (Ruy Lopez: Cozio Defense) · g6 (Ruy Lopez: Fianchetto Defense)

Where you stand

The position is strategically rich and unconventional. White usually continues with c3 or Nc3 to reinforce the center and prepare for d4, while Black will look to develop the kingside and use the a5-pawn to frustrate White's queenside coordination. Both sides must balance central control with the unique pawn structure on the flank.

• b1-c3 Develop the knight to control d5
• e1-g1 Castle kingside to secure the king
• g8-f6 Develop the knight and attack e4
• a8-a6 Lift the rook to support queenside