Chess clock
Runs in your browser. Nothing you type is sent anywhere.
Black taps their side to start White's clock, or press Space.
How to use the chess clock
- Tap a preset, like 3 + 2 or 15 + 10, or type minutes each and an increment, then press Set.
- Black taps their side to start White's clock.
- After each move, tap your own side to start your opponent's clock.
- Press Pause, or P, to stop both clocks. A player whose time runs out is flagged.
Questions
What does 3 + 2 mean?
Three minutes each, plus two seconds added to your clock every time you finish a move. This is called an increment (or Fischer timing). 5 + 0 means five minutes each with nothing added.
Can I use it on a phone between two players?
Yes. Lay the phone flat between you and press Full screen. On a narrow screen the halves stack, and in full screen the top half turns round to face the player opposite. Each half is a big button, so a quick tap works.
What if someone taps the wrong side?
A tap only counts on the side of the player who is moving, so a tap on the waiting side does nothing. Each player's time is worked out from your device's clock, so it stays exact even if the page misses frames.
What happens when time runs out?
That player's side turns red, the clock beeps, and the board shows who wins on time. Press Reset, or R, to play again.
What keyboard shortcuts are there?
Space ends the turn of the player on move (or starts White's clock), P pauses and resumes, R resets, and F goes full screen.
Is anything sent to a server?
No. The clock runs in your browser. Nothing you type is sent anywhere.