Centralization

To centralize a piece is to place it on or near central squares from which it can influence several parts of the board. A centralized piece usually has more routes, can switch targets quickly, and contributes more effectively to center control, influence over the central squares.

The effect depends on the piece. A knight usually controls far more squares in the center than on an edge. Bishops and the queen do not need to occupy one of the exact four central squares: a nearby square may give them diagonals or files that cross the center. Rooks often benefit from clear central files, the board's vertical lines. The king is the clearest exception: it usually needs safety in the opening, but its centralization can be decisive in the endgame, the late phase with fewer pieces.

Centralization is not automatically good. The piece must be safe, have a purpose, and work with the rest of the army. A seemingly active piece may become a target if the opponent chases it while gaining a tempo, meaning one useful turn. Development activates pieces from the start; centralization is one possible, but not compulsory, way to do so.