Timer tools · Games & practice
Chess Clock
Your move. Your time.
End this game and reset both clocks?
Choose your time control
Tap only the running clock to end a move. Both clocks stop when a player runs out of time. Pause before leaving the game if you do not want time away to count.
Make it sound like you
Twelve synthesized sounds. Test your volume before starting. Keep this page open; sleeping devices and background tabs can prevent timely alerts.
Screen awake is off.
Settings and sessions are saved on this device.
How to use the chess clock
Set each player’s starting time and choose no bonus, Fischer increment, or simple delay. Start the game, then tap the active player’s clock after a move to start the other clock. A flag stops both clocks.
Fischer increment adds the bonus after a completed move. Simple delay grants time at the beginning of each turn before the main clock starts decreasing; unused delay does not accumulate. Pausing and resuming preserves the remaining delay.
Does this enforce all tournament rules?
No. It is a local two-player timekeeper, with no board state, move legality checks, arbiter controls, or multi-period time controls. Agree on settings before starting your casual game.
What happens if I refresh or switch tabs?
Running timers are recovered from saved timestamps after a refresh. They catch up to the elapsed schedule without replaying a stream of missed sounds. In manual-transition mode, the next step waits for you. Keep the page open and test your sound: background throttling, sleeping devices, or closing the browser can delay or prevent an alert. Changing the device clock can affect recovery after a reload.
Do I need an account?
No. Settings and the current session stay in this browser. They are not synced to an account. Clearing TimeCubby data removes them. Sounds are generated locally, with no audio files downloaded or uploaded.