What Does Ball On Mean in Snooker?

Jun 27, 20269 min read

In snooker, the “ball on” is the ball, or group of balls, the striker is legally allowed to hit first with the cue ball on the next shot.

If reds are still on the table, a red is normally on at the start of a turn. After potting a red, the player chooses a colour as the next ball on. Once all reds are gone, the colours become on in order: yellow, green, brown, blue, pink, then black.

This guide explains the meaning, the common examples, free-ball exceptions and the beginner mistakes that lead to fouls.

Updated August 2026. Formal matches should always be checked against the latest WPBSA rulebook.

A state map showing how the ball on changes while reds remain, after a red is potted, and during the colours-only phase.

Quick Answer: What Does Ball On Mean in Snooker?

“Ball on” means the legal object ball for the next stroke. The cue ball must first hit a ball on. If it hits the wrong ball first, that is a foul, even if another ball later goes into a pocket.

The Basic Rule

Snooker is not just about potting any available ball. Every shot has a legal target. That target is the ball on.

At the start of a frame and at the start of most turns while reds remain, a red is on. Any red counts because all reds are treated as the same one-point group.

If you pot a red, your next ball on is a colour of your choice. You can choose yellow, green, brown, blue, pink or black, but you should make the choice clear if there is any doubt.

What Happens After You Pot a Red?

After a legal red, the red stays off the table and the striker nominates a colour. If the colour is potted, it scores its value and is normally replaced on its spot while reds remain.

Then a red is on again. This red-colour-red-colour rhythm continues until all reds are gone and the colour following the last red has been played.

A legal-contact visual explaining that the cue ball must first strike a ball on, with special cases for nominated colours and free balls.

Why First Contact Matters

The cue ball must first contact a ball on. You cannot hit a colour first when red is on and claim the shot was fine because a red dropped later. The first contact decides legality.

This is why safety play matters. A player can leave the opponent unable to see a direct path to the ball on. If the opponent misses the ball on, foul points are awarded and the referee may also call a miss where the rules require it.

Pro tip: before every shot, ask “what is on?” before asking “what can I pot?” That one habit prevents a lot of beginner fouls.

Three Worked Examples

Example one: reds are still on the table and you have just come to the table after your opponent missed. A red is on. You can hit any red first, pot a red, or play safe from a red.

Example two: you pot a red and the cue ball finishes nicely for the black. The black is not automatically on until you choose it. In practice everyone may understand the choice, but if there is doubt, nominate it clearly.

Example three: all reds are gone and the yellow is still on the table. You cannot decide to play the blue just because it is easier. Yellow is on first, then green, brown, blue, pink and black.

When the Colours Are On

Once all reds have gone and the colour after the final red has been played, the colours become on in ascending value. That means yellow is on first, then green, brown, blue, pink and black.

At this stage, you do not choose any colour you like. If yellow is still on the table, yellow is the ball on. After yellow is legally potted, green becomes on, and so on.

What Does Nominating a Colour Mean?

Nominating means declaring which colour you intend to play when the rules require or when the choice is not obvious. After potting a red, the striker’s next ball on is a colour of their choice.

In casual play, everyone may understand which colour you are playing. In formal play, if there is doubt, make it clear. A simple “black” or “blue” avoids confusion.

What Is a Free Ball?

A free ball is a special situation after a foul. If the incoming player is snookered on the ball on because of the foul, they may be allowed to nominate another object ball as a substitute ball on for that shot.

For example, if red is on but the cue ball is illegally left unable to hit either side of a red, the player may be awarded a free ball and nominate a colour as a red. That colour then counts as the ball on for the stroke.

Free ball situations are a major reason beginners get confused, because the “wrong” ball can temporarily become legal.

A four-question checklist for identifying the ball on before playing a snooker shot.

How Fouls Are Scored When You Miss the Ball On

In snooker, a foul is normally worth at least four points to the opponent. The exact value depends on the ball on and the balls involved in the foul. If the black is involved, for example, the penalty can be seven.

This is why “ball on” matters even when no pot is attempted. A safety shot still has to contact a legal ball first. Missing it gives away points and may leave the opponent with a strong position.

For beginners, the practical rule is simple: if you are not sure you can hit the ball on, choose the highest-percentage escape rather than the most ambitious pot.

Touching Ball and Ball On

A touching ball situation happens when the cue ball is resting against another ball. If that ball is on, the striker must play away from it and does not need to hit it again. If the situation is unclear, wait for the referee or agree it clearly in club play.

This is another case where guessing causes arguments. Clarify whether the touching ball is on before playing.

A Beginner Practice Routine

Set up three reds and the six colours. Call out the ball on before every shot. Start with red, then nominate a colour, then red again. When all reds are gone, call yellow, green, brown, blue, pink and black in order.

The aim is not to make a big break. The aim is to train the table-state habit. If you can identify the ball on quickly, the rest of snooker becomes easier to follow.

Do this for ten minutes before matches and you will stop making the most common rules mistakes.

Common Beginner Mistakes

Hitting a colour first when red is on.
Forgetting to nominate a colour after potting a red.
Thinking any colour can be played during the final colours sequence.
Assuming a potted ball makes the shot legal even when first contact was wrong.
Misunderstanding a free ball as a permanent rule change.

Equipment Note

Understanding the ball on is rules knowledge, not an equipment issue. Still, clear practice is easier with reliable kit. Browse snooker balls, snooker cues, cue chalk and the wider cue sports range if you are setting up proper practice.