Domination in chess refers to a situation where an opponent’s piece is unable to move freely — or is effectively trapped — without being formally pinned or directly captured: it is simply confined to a zone fully controlled by your pieces.
The idea is straightforward: some pieces, such as knights or bishops, have naturally restricted mobility depending on pawn structure and the position of surrounding pieces. By placing your pieces so that they cover every square the enemy piece could reach, you dominate it — it can neither attack effectively nor find a safe square.
A classic example is a knight trapped near the edge of the board. If your pieces cover all the squares it could jump to, it is dominated: it stays put, passive, and becomes a permanent weakness in your opponent’s position.
In practice, look for enemy pieces that appear "misplaced" and ask yourself whether you can occupy or control all their escape squares. A dominated piece does not capture, does not defend, does not threaten — it is simply out of the game, which often translates into a de facto material advantage.
