Chess clock etiquette for over-the-board play

Set the board fairly

Clock placement is usually determined by the organizer or arbiter, not negotiated for a small ergonomic advantage. Keep scoresheets, drinks and captured pieces away from the buttons. Both players should be able to see the display.

Press, do not punish

Use a controlled press. Slapping can move the clock, disturb pieces and create unnecessary conflict. Do not keep a finger on the button or block the opponent's access. If a button fails, pause and call for help.

Handle interruptions

Phones, illegal moves, displaced pieces and outside disturbances are governed by event rules. Avoid arguing while a timer runs. Pause only when the rules allow it, raise your hand and let the responsible official preserve the game state.

Source for the factual guidance above: FIDE Laws of Chess.

A fair board-and-clock setup

Both players should be able to see the digits and reach the button without leaning across the board. In an organized event, the arbiter decides placement; do not rotate or relocate equipment unilaterally. Keep scoresheets, captured pieces, drinks, and bags away from the buttons. Before the round, confirm the control and that both displays agree. If you need an accommodation or a different physical arrangement, raise it early. A settled table reduces accidental presses and removes one source of friction before the first move.

Firm play without clock gamesmanship

Press once after completing the move and withdraw your hand. Do not hover over the button, hold it down, hit it with a captured piece, or use excessive force. Avoid comments about the opponent's remaining time. Their clock management is their responsibility unless the rules require an official intervention. If a button does not respond, pause and seek help rather than repeatedly striking it. Good etiquette is not ceremonial politeness; it preserves reliable timing evidence for both players.

What to do when something interrupts play

For a displaced piece, promotion issue, setting problem, or need for an arbiter, preserve the board and pause the clock only as the applicable rules allow. Explain the observable problem without continuing analysis aloud. Do not use a pause as extra thinking time. Once the matter is resolved, verify whose turn it is and which timer should run before resuming. In casual play, agree on the same procedure in advance. A predictable interruption routine protects fairness when attention is already divided.