Quiet move

A quiet move gives no check, a direct attack on the king, and makes no capture, so its purpose may not look urgent at first. Some definitions also exclude any direct attack, while others use the term more broadly for a move whose main effect is preparatory. It may control a king's escape square, bring another piece into the attack, move a friendly obstruction, or prevent the opponent's intended defense.

Quiet does not mean passive. In many positions, every check and capture allows a defense, while an unobtrusive move leaves a threat that is difficult or impossible to stop. Its force comes from changing which squares and paths the pieces control without giving the opponent a comfortable reply. It can also preserve the initiative, the ability to pose problems that make the other side react.

How to look for one

After examining forcing moves, such as checks, captures, and threats that demand a reply, identify the defense that prevents your idea from working. A quiet move often removes that defense, adds an attacker, or takes away an escape square. Then verify that the opponent has no stronger check, capture, or threat during that preparatory tempo, the single move used to prepare the idea.