A large part of the problems related to the clock in tournaments do not happen during the game, but before it starts. Misconfigured clocks, batteries close to running out, incorrect time modes, or simple oversights can ruin a round that, from a chess point of view, was well planned.
Preparing a clock correctly before a round is not only the arbiter’s responsibility. As a player, knowing how to check that everything is in order gives you peace of mind, avoids conflicts, and allows you to focus on the board from the very first move. In this guide we are going to see what to check and why, whether you play tournaments or organize games in a club.
Why preparing the clock is so important in competition
In competitive chess, the clock is part of the playing conditions. If those conditions are not correct from the start, everything that happens afterward may be called into question. A game with a misconfigured clock creates doubts, claims, and, in the worst case, difficult arbitral decisions.
Many players assume that “the clock will be fine” and do not check it. However, in large tournaments there are dozens or hundreds of clocks, and human errors do exist. Spending a few seconds checking everything is a simple way to protect yourself as a player.
In addition, this prior check greatly reduces stress. Knowing that the clock is correct allows you to go into the game with a clear head, without the feeling that something “might fail.”

Checking the time mode before starting the game
The first key point is to verify that the time mode is correct. It is not enough to look at the initial minutes; you need to understand how the clock will behave after each move.
It is advisable to check:
- each player’s initial time
- whether there is increment or delay
- how many seconds are added per move, if applicable
Many problems come from confusing similar modes, for example a 15+10 with a 15+0, or an increment with a delay. These mistakes are not always detected immediately, and when they are discovered, the game is already well underway.
The practical rule is simple: if something does not seem right, ask before starting, not afterward.
Checking the physical condition of the clock
Beyond the configuration, the physical condition of the clock also matters. A clock may be correctly programmed but still not work properly because of a mechanical or electrical problem.
Before starting, it is a good idea to check that:
- the buttons respond properly
- the display is clear and readable
- there are no strange delays when pressing
- the clock does not switch off or reset by itself
In the case of analog clocks, it is advisable to make sure that the hands move normally and that the flags are not about to fall at the start of the game.
The issue of batteries: small detail, big problem
Batteries are one of the most common causes of incidents with digital clocks. A clock may turn on correctly and still run out of battery in the middle of the game.
For that reason, in well-organized tournaments:
- the batteries are checked before the round
- they are replaced preventively
- new or good-condition batteries are used
As a player, you cannot always change the batteries yourself, but you can pay attention to warning signs, such as dim displays or erratic behavior. Detecting this before starting can save you an awkward interruption later.
Ensuring the clock is correctly placed on the table
The placement of the clock is also part of the preparation. The clock must be positioned so that both players can see it without difficulty and so that it does not interfere with the board or the pieces.
In many competitions a fixed rule is followed, such as placing it to White’s right or centered on the table. If the placement is unclear or causes inconvenience, the correct thing to do is to resolve it before starting, preferably with the help of the arbiter.
Moving the clock once the game has started can create problems, so it is better to place it correctly from the beginning.
What to do if you detect a problem before starting
If you notice any irregularity before the first move—dubious configuration, technical failure, low battery—the correct course of action is not to start the game and to inform the arbiter or the person in charge.
Trying to “fix it quickly” between the players usually makes the situation worse. Once the game starts, any modification to the clock is more complicated and may lead to claims.
In chess, prevention is always better than correction.
Preparing the clock in clubs and unofficial games
In clubs and friendly games, clock preparation is usually taken more casually, but the principles are the same. Checking the time mode, the operation, and the placement avoids unnecessary arguments.
In addition, getting used to preparing the clock properly in informal settings creates a very positive habit that later carries over into tournaments.
Common mistakes in pre-game preparation
Many of the recurring problems in tournaments come from small oversights:
- assuming the clock is correct without checking it
- not checking the increment
- ignoring battery warnings
- starting the game with doubts
These mistakes are usually not made with bad intentions, but their consequences can be serious.
Conclusion
Properly preparing the clock before a round or tournament is an essential part of competitive chess. It does not require advanced technical knowledge, only attention and a few seconds of conscious checking.
A well-prepared clock avoids conflicts, reduces stress, and allows the game to be decided by chess, not by a technical problem. As a player, adopting this habit makes you more professional, even in amateur tournaments.