Blitz chess compresses a game into a short window by giving each player a limited amount of time for all their moves. A chess clock tracks that time, switching from one player’s countdown to the other after every move. Settings such as increment or delay can add a little time to each turn. Knowing how these controls work helps you manage your clock, understand a flag fall, and avoid surprises during a game.
What Makes a Game Blitz
Blitz is a fast time-control format. Under widely used chess rules, a game is classified as blitz when the time allowed for each player, plus any added time per move, is more than 10 minutes and no more than 60 minutes. Clubs, platforms, and tournament organizers set the specific control, so check the posted rules before playing.
A time control may be written as a starting time followed by an increment, such as 5+3. This means each player starts with five minutes, and three seconds are added to that player’s clock after each move. A control written as 5+0 has five minutes per player and no increment.
How the Chess Clock Runs
A digital chess clock has a separate countdown for each player. At the start, the clock begins running for the player whose turn it is. After making a move on the board, that player presses the clock button; the running countdown stops, and the opponent’s begins. Pressing before completing the move can create an illegal or disputed sequence, so finish the move on the board first.
The clock measures each player’s total thinking time across the game, not a separate fixed allowance for every move. If you spend 40 seconds on one turn, those seconds come off your remaining time. Your opponent’s clock stays stopped while you think, and your own clock stays stopped while your opponent thinks.
Increment and Delay Settings
An increment adds a set number of seconds to a player’s remaining time after that player completes a move and presses the clock. With a 5+3 control, a player who uses two seconds on a turn generally gets three seconds added after the move, leaving slightly more time than before. The increment can reward efficient play, but it does not make the clock unlimited.
A delay gives a player a short grace period before the main countdown starts to decrease on each turn. For example, with a five-second delay, the first five seconds of that turn do not reduce the player’s main time. Delay and increment work differently, and clock models or event rules may handle their display in different ways. Confirm the setting before play.
When a Player Runs Out
When a player’s time reaches zero, the player has run out of time; in chess, this is often called flagging. The opponent can usually claim a win if they have enough material to checkmate by some possible legal sequence. If checkmate is impossible by any legal sequence, the result is a draw under standard rules. Follow the event’s procedure for stopping the clock and making the claim.
Do not assume that seeing zero on a display always settles the result by itself. A clock may show a flag, but players or an arbiter may still need to verify the position and apply the rules. Keep the board position legal, press the clock promptly after each move, and ask the organizer how to handle a disputed flag fall before the game begins.
Blitz clocks are straightforward once you know which side is running, how the control adds or delays time, and what a flag fall means. Before a game, confirm the exact setting and the procedure for time disputes. If you want to practice these skills over the board, Montreal Blitz Chess offers a place to play.