What is the difference between rapid, blitz and classical chess?
I · Intermediate · Other forms of play · 7 of 7The difference is the thinking time. Blitz gives each player 10 minutes or less, rapid more than 10 and less than 60, and standard chess 60 or more. The moves are the same. In rapid and blitz, players need not write the moves down, and an illegal move stands if nobody catches it in time.
How it works
- Counting the time: the allotted time plus 60 times any increment. Three minutes with two seconds a move counts as five minutes, which is blitz.
- No scoresheet: players need not record the moves, and keep their rights to make claims.
- Smaller time penalties: one minute, not two, for an illegal move or a wrong draw claim.
- Full supervision: the full competitive rules apply if the games are recorded and one arbiter watches at most three rapid games or one blitz game.
- Otherwise: after 10 moves each, no claim about the set-up of the board or the clock setting.
- Illegal moves: must be claimed by the opponent, or seen by the arbiter, before the opponent's next move. If not, the move stands.
- Winning on time: the player claims by pausing the clock and telling the arbiter. The arbiter also calls a flag fall on seeing it.
- Which regime: the event must say in advance which set of rules applies throughout.
The glossary has rapid and blitz, the time control, the increment, the illegal move, the flag fall and the notation.
Tricky cases
In a blitz game a player leaves the king in check and the opponent plays on. Can it be put right later?
No. Once the opponent has made their next move, the illegal move cannot be corrected unless both players agree.
Is a game of 15 minutes with a 10-second increment rapid?
Yes. Fifteen minutes plus 60 times 10 seconds is 25 minutes, which is more than 10 and less than 60.
Does one illegal move lose a blitz game?
No. Under the current Laws the first costs one minute to the opponent's benefit and the second loses, as in rapid.
Both kings are in check on the board in a rapid game. What does the arbiter do?
The arbiter waits until the next move is completed. If an illegal position is still on the board, the game is declared drawn.
Why the rule exists
With minutes on the clock there is no time to write moves, and no arbiter can watch dozens of fast games at once. The fast-chess rules shift the job of policing to the players: spot the mistake at once or live with it.
Where it differs
| Where | What changes | Source |
|---|---|---|
| Blitz | 10 minutes or less, counting 60 increments | FIDE Laws B.1 |
| Rapid | More than 10 and less than 60 minutes | FIDE Laws A.1 |
| Standard | At least 60 minutes | FIDE Laws, Glossary of Terms |
| Supervised and recorded games | The full competitive rules apply | FIDE Laws A.4; B.2 |
| Other rapid and blitz games | Claim illegal moves before the next move; no late set-up claims | FIDE Laws A.5; B.3 |
From the rule book
FIDE, Laws of Chess (approved 7 August 2022, applied from 1 January 2023), Appendices A and B and the Glossary of Terms. Checked 14 October 2026. Official document: FIDE Laws of Chess taking effect from 1 January 2023 (FIDE Handbook E.01).