Competition, history, and culture
Playing speeds and time controls
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Time control
The rule that determines how much thinking time each player has and when additional time is received during a game.
Classical chess
Chess played with long time controls, in contrast with rapid and blitz formats.
Rapid
A format in which each player's regulatory playing time is more than 10 minutes but less than 60 under FIDE rules.
Blitz
A very fast format that the FIDE Laws define as 10 minutes or less of regulatory playing time per player.
Bullet
A widely used informal name for extremely fast chess games, usually shorter than ordinary blitz.
Increment
A fixed amount of time added to a player's clock for every move.
Delay
A clock mode that gives a non-cumulative grace period on each move before the player's main time is fully consumed.
Bronstein delay
A clock mode that, after each move, restores up to a fixed amount of the time just used, without letting the balance exceed its start-of-move level.
Sudden death
A term used for a final clock period in which all remaining moves must be completed and, in some events, for a deciding game or phase intended to settle a tied match.
Reflection time
Level: IntermediateTime charged to a player while it is that player's turn to move in a correspondence chess game.
Triple Block time control
A correspondence time control that divides each player's available time among a clock, an increment, and a bank.
