Center

The center usually refers to the four squares d4, e4, d5, and e5, along with the surrounding central area.

Pieces placed toward the center often influence more squares. Openings differ in whether they occupy the center with pawns or control it from a distance.

The core center has four squares

The central squares d4, d5, e4, and e5 connect both sides of the board. Pieces placed near them often reach more squares, and pawn moves in the center can open lines for bishops and queens.

The center can be occupied or controlled

Classical openings often place pawns directly on central squares. Hypermodern systems may invite a pawn center and attack it later with pieces or pawn breaks. Both approaches care about central control even though the pawn placement differs.

Do not release central tension without a reason

When central pawns attack one another, capturing, advancing, and maintaining the tension lead to different structures. The best choice depends on which files, diagonals, and squares each change opens.