The Lucena position: build a bridge

The position

The Lucena position is the goal for the side with rook and pawn against rook. The pawn stands on the seventh rank and the king on the promotion square in front of it. The defender's king is cut off from the pawn by the rook, and the defender's rook stands on the other side.

The problem is White's own king. It stands in the pawn's way, and as soon as it steps out, Black's rook comes with checks from the side or from behind. There is no natural shelter for the king on the board. The solution is to use the rook as a shield.

Build a bridge

First the rook drives Black's king one more file away with a check. Then the rook goes to the fourth rank, Rd4. Now White's king steps out. When the checks come, the king walks toward the rook, and when it gets there, the rook steps in between and stops the checks. This maneuver is called building a bridge.

Why the fourth rank?

The rook has to be ready to step in between once the king has escaped. With the rook on the fourth rank, the king walks down toward the fifth rank, and when the check comes along the b-file, the rook steps in on b4. Then the bridge is finished.

Practice against the computer

The same idea, but with the pawn on d7 and Black's king already cut off on the f-file. Build the bridge and take the pawn to the last rank. The computer defends Black.

The history

The position is named after the Spaniard Luis Ramírez de Lucena, who published one of the oldest printed chess books in 1497. But the position isn't in his book. The oldest known description is from Alessandro Salvio's book Il Puttino from 1634. Aron Nimzowitsch called the rook's maneuver building a bridge.

Lucena is about winning. The other position every player needs to know is about holding the draw: the Philidor position.

Updated October 28, 2026