Two-player chess clock with multiple time control modes including Fischer, Bronstein, and simple delay.
Chess Clock / Game Timer tracks separate countdowns for two players while allowing only the active player's time to run. Set the starting time and choose a plain countdown, Fischer increment, Bronstein delay, or simple delay, then switch sides whenever a turn ends. The commonly missed distinction is that Fischer adds time, while both delay methods protect part of the time spent on a turn. Bronstein and simple delay can therefore show different values during a turn even when their post-turn results match.
A concrete input and expected output from the current implementation.
Input
Starting time: 1:00 each; mode: Fischer; increment: 5 seconds. Player 1 uses exactly 8 seconds, then ends the turn.
Expected output
Player 1 has 0:57 remaining, Player 2 has 1:00 remaining, and Player 2's clock is active.
Player 1's 60 seconds fall to 52, then the 5-second Fischer increment raises the balance to 57. Player 2 has not used any time.
The timer maintains one balance for each player, but counts down only the active side. Ending a turn stops that player's clock and starts the opponent's clock. This handoff is essential: if a player forgets to switch sides, the displayed balances will describe elapsed clock time incorrectly even if the moves themselves were valid.
Fischer timing gives the player the full configured increment for each completed turn. Bronstein timing returns up to the configured delay, limited to the time actually spent. Simple delay waits for the configured delay before reducing the main balance. Bronstein and simple delay have the same net deduction after a completed turn, but their live countdown behavior differs.
No. Fischer adds the entire increment and can increase a player's balance. Bronstein offsets no more than the time spent, while simple delay postpones the main countdown. Bronstein and simple delay can produce equal balances after each completed turn, but they do not present the running turn in the same way.
It can show that a player's configured time has expired, but that alone may not settle an official result. Chess rules can make the outcome depend on the position, the opponent's mating possibilities, claims, and event procedures. For organized play, use the displayed expiration together with the governing rules and an arbiter's decision.
The example and behavioral notes were checked against the browser implementation. Standards and primary references below define the relevant format, formula, or platform behavior.
Create customizable checklists with groups, due dates, and priorities for any project.
Design a printable daily planner with time blocks, goals, and priority sections.
Measure your typing speed in WPM and accuracy with real-time feedback and stats.
Pomodoro timer with built-in ambient noise (rain, cafe, forest) generated via Web Audio API oscillators.
Stay focused with a customizable Pomodoro timer featuring work and break intervals.
A precise stopwatch with lap tracking, split times, and exportable results.