Chess Time Controls Explained: Rapid, Blitz & Increments

Q: What does 3+2 or 15+10 mean in chess?

The first number is the base time in minutes allocated to each player at the start of the game. The second number (after the plus sign) is the increment in seconds added to a player’s clock automatically after completing each move.

Q: What is the difference between Blitz and Rapid chess?

Under FIDE regulations, Blitz chess gives each player 10 minutes or less (calculated as base time plus 60 times the increment). Rapid chess gives more than 10 minutes but less than 60 minutes per player. Anything 60 minutes or longer is Classical (Standard) chess.

Q: What is the difference between Fischer increment and Delay?

In Fischer increment, bonus seconds are permanently added to your remaining clock time with every move. In Bronstein Delay, the clock pauses for the delay duration; unused delay time does not carry over or accumulate.

From fast-paced 3-minute blitz battles to 5-hour classical marathons, time controls dictate the character, strategy, and arbiter rules of any chess competition.

If you have ever wondered what 5+3 or 90+30 means, or how digital clock increments prevent time scrambles, this guide breaks down every modern time control category recognized by FIDE.

1. How Time Control Notation Works

Modern chess clocks display time in the standard Base + Increment format:

[Base Minutes] + [Increment Seconds per Move]

3 + 2: 3 minutes base time with 2 bonus seconds added after each move.
15 + 10: 15 minutes base time with 10 bonus seconds added after each move (the most popular Rapid format).
90 + 30: 90 minutes base time with 30 bonus seconds added per move (World Championship standard).

2. The 4 Official FIDE Time Categories

FIDE classifies tournaments using the Total Time Calculation (Base Time + 60 × Increment Seconds):

Category	Total Time per Player	Common Formats	Scoresheet Notation
Bullet	< 3 minutes	1+0, 1+1, 2+1	Not required
Blitz	3 to 10 minutes	3+2, 5+0, 5+3	Not required
Rapid	> 10 to < 60 minutes	10+0, 15+10, 25+5	Optional or Required until 5 min
Standard (Classical)	60+ minutes	60+30, 90+30	Mandatory on every move

3. Increment vs. Delay: What Every Arbiter Must Know

Before digital clocks, sudden death time controls led to chaotic physical piece spills and clock slamming. Modern tournaments use one of two systems:

Fischer Increment: Invented by World Champion Bobby Fischer. When you hit the clock, the increment is immediately added to your pool. If you move fast, your clock time actually increases!
Bronstein Delay: The clock waits for the delay period (e.g. 5 seconds) before counting down. If you make a move in 3 seconds, your clock remains unchanged. Unused delay cannot accumulate.

4. Automatic Classification in ChessManager Online

When creating a tournament in ChessManager Online, you simply type your desired time control (e.g. 15 + 10). The platform automatically categorizes the event as Rapid, configures appropriate round intervals, and formats the pairing sheets for live player displays.

Set Up Your Next Blitz or Rapid Tournament

Instant Swiss pairings with custom time controls for club and school events.

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Frequently Asked Questions

The first number is the base time in minutes allocated to each player at the start of the game. The second number (after the plus sign) is the increment in seconds added to a player’s clock automatically after completing each move.

Under FIDE regulations, Blitz chess gives each player 10 minutes or less (calculated as base time plus 60 times the increment). Rapid chess gives more than 10 minutes but less than 60 minutes per player. Anything 60 minutes or longer is Classical (Standard) chess.

In Fischer increment, bonus seconds are permanently added to your remaining clock time with every move. In Bronstein Delay, the clock pauses for the delay duration; unused delay time does not carry over or accumulate.

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