Blackball is one of the most widely played forms of pool in the UK and around the world, but understanding the rules can sometimes be harder than actually potting the balls.
Different leagues, venues and competitions have used different pool rules over the years, so it is hardly surprising that questions about Blackball rules regularly end up with several players around a table all giving slightly different answers.
This guide explains the WPA Blackball pool rules in straightforward language, including how the balls are racked, what makes a legal break, how groups are decided, what happens after a foul, how a free shot works and when a player can lose the frame.
This guide is based on the current World Pool Association Rules of Play. Competition organisers can apply additional regulations, so players should always check the rules being used at a particular event or league.
What is Blackball pool?
Blackball pool is a form of eight-ball pool played with 15 object balls and one cue ball.
The object balls consist of:
- Seven balls in one group
- Seven balls in the other group
- One black ball
In the UK, the two groups will most commonly be reds and yellows, although the WPA rules also allow the familiar numbered solids and stripes used on American-style pool balls.
The aim is simple: legally clear your group of balls and then legally pot the black.
Blackball rules at a glance
| Rule | Blackball |
|---|---|
| Object balls | Two groups of seven plus the black |
| Are shots called? | No |
| After the break | The table remains open until a group is legally established |
| After a foul | The incoming player receives one free shot at the start of their visit |
| Black on the break | Re-rack and the same player breaks again |
| Winning | Clear your group and legally pot the black |
How do you rack the balls in Blackball?
Under WPA Blackball rules, the black ball is positioned on the foot spot.
The remaining red and yellow balls are arranged around it in the prescribed Blackball rack pattern. This is different from simply putting the black somewhere in the middle of the triangle, so proper racking matters in organised competition.
We will cover the exact Blackball rack setup separately in another guide, including a diagram showing where every red, yellow and black should be placed.
What are the Blackball break rules?
The break begins with the cue ball in hand in baulk.
For the break to be legal, at least one of the following must happen:
- At least one ball is potted; or
- At least two object balls cross the centre string.
If neither happens, the break is a foul.
What happens if you pot the black from the break?
Potting the black from the break does not win the frame.
Instead, all of the balls are re-racked and the same player breaks again.
This is one of those rules worth remembering because the dramatic celebration after smashing the black straight into a pocket may be slightly premature.
Are reds and yellows decided on the break?
No. The table is open after the break.
Even if red or yellow balls are potted during the break, that does not automatically decide which group the breaking player has.
The table remains open until a player legally pots one or more balls from only one group during a normal legal shot.
That player is then assigned that group, with the opponent taking the other.
Do you keep playing when you pot a ball?
Yes. A player's visit continues for as long as they continue to legally pot balls.
If the player does not legally pot a ball but has not committed a foul, their visit ends and the opponent plays from the position in which the balls have finished.
What happens after a foul in Blackball?
This is one of the most important Blackball rules to understand.
When a player commits a standard foul, their visit ends and play passes to the opponent. The incoming player receives one free shot on the first shot of their visit.
The term "free shot" is important. Blackball does not simply give the incoming player two ordinary visits.
What is a free shot in Blackball?
During a Blackball free shot, the normal requirement to hit one of your own group's balls first is suspended.
That means the player can use an opponent's ball as the first ball contacted during the free shot.
The incoming player can choose to play the cue ball from where it has stopped or take the cue ball in hand in baulk.
If the player legally pots a ball and continues their visit, subsequent shots return to the normal rules.
Can you pot an opponent's ball on a free shot?
The free shot suspends the wrong-ball-first rule, allowing an opponent's ball to be contacted first.
Outside that free-shot situation, potting an opponent's ball without also potting one from your own group is specifically listed as a Blackball foul.
Where can the white ball be placed after a foul?
When the incoming player chooses to take the cue ball in hand following a foul, it can be positioned anywhere within baulk.
The player can continue adjusting its position by hand until the shot is played.
A useful detail that catches some players out is that the cue ball does not have to leave baulk before hitting an object ball.
What counts as a foul in Blackball?
Blackball uses the general WPA foul rules alongside several fouls that specifically apply to Blackball.
Examples of standard fouls include:
- Potting the cue ball or driving it off the table
- Hitting the wrong ball first
- Failing to meet the required rail conditions after contact
- Playing without at least one foot touching the floor
- Driving a ball off the table
- Touching a ball illegally
- Making a double hit
- Playing a push shot
- Playing while balls are still moving
- Playing out of turn
- Certain instances of slow play
Blackball-specific fouls
The WPA rules also identify some additional Blackball situations as fouls, including:
- Potting an opponent's ball without also potting one from your own group
- Playing before balls that need to be spotted have been spotted
- Jumping the cue ball over another ball
Because fouls can quickly become one of the most debated areas of the game, we will also be publishing a dedicated Blackball fouls guide covering common situations in more detail.
What happens with a touching ball?
If the cue ball is touching an object ball, the player must not play the cue ball in the direction of that ball.
If the touching ball is a legal ball for the shot and the player shoots away from it, they are considered to have hit that touching ball.
What happens if you are snookered in Blackball?
Under the WPA definition, a player is snookered when the cue ball has no straight, direct path to hit at least part of a legal target ball.
For the snooker rule to apply in refereed play, the snooker must be declared by the referee.
When a player is officially snookered, the normal WPA rule requiring a ball to reach a rail after contact is suspended for that shot.
Can you deliberately hit the wrong ball in Blackball?
This is where the difference between a normal foul and a loss of frame becomes particularly important.
Accidentally hitting the wrong ball first can be a standard foul. However, intentionally violating the wrong-ball-first rule is a loss-of-rack foul.
The rules also state that failing to attempt to hit a ball that is "on" results in loss of the rack.
When do you lose the frame in Blackball?
Under WPA Blackball rules, a player loses the rack if they:
- Pot the black on an illegal shot
- Pot the black while any balls from their own group remain on the table
- Intentionally hit the wrong ball first
- Fail to attempt to hit a legal ball
Unsportsmanlike conduct can also result in loss of rack or another penalty depending on the circumstances.
Do you have to nominate a pocket for the black in Blackball?
No. Shots are not called under WPA Blackball rules.
That applies throughout the game, including when playing the black.
What happens if a ball leaves the table?
Object balls driven off the table are spotted back onto the table according to the WPA spotting procedure.
If several balls need to be spotted, Blackball has a defined order, beginning with the black ball before the relevant group balls and then other balls.
What happens in a Blackball stalemate?
A stalemate can be declared when there is no progress towards the conclusion of a frame. It can also occur where the position of the balls means there is no legal shot available.
If the frame is declared a stalemate, the balls are re-racked and the player who originally broke that rack breaks again.
Common Blackball rules questions
Do you get two shots after a foul in Blackball?
Not quite. The incoming player receives one free shot on the first shot of their visit. If they legally continue after that shot, they remain at the table under the normal rules.
Does potting a colour on the break decide your group?
No. The table remains open after the break until a group is established with a legal normal shot.
Do you win if the black goes in from the break?
No. The balls are re-racked and the same player breaks again.
Do you have to call your shots in Blackball?
No. WPA Blackball is not a call-shot discipline.
Can you move the white after a foul?
The incoming player can choose to take the cue ball in hand in baulk as part of their free shot.
Can you hit your opponent's ball first?
Normally, no. However, the wrong-ball-first restriction is suspended during a free shot following a foul.
Can you intentionally foul in Blackball?
Players need to be very careful here. Intentionally violating the wrong-ball-first rule is specifically listed as a loss-of-rack foul, as is failing to attempt to hit a legal ball.
Blackball rules vs other pool rules
One reason pool rules cause so much confusion is that Blackball is not the only ruleset used in British pool.
Players may also encounter International Rules, World Rules and other competition-specific formats. Some situations that feel completely normal under one ruleset can be treated differently under another.
We will be breaking those differences down in our next guide: Blackball Rules vs International Rules - What's the Difference?
Blackball and the 2026 WPA Blackball World Championships
Blackball will be firmly in the spotlight this October when the WPA Blackball World Championships take place at the Thistle Hotel Heathrow in the UK from 19-29 October 2026.
Chalky Trousers is proud to be the Official Merchandiser of the British Pool Federation and will be attending the World Championships at Heathrow.
In the run-up to the event, we will be publishing more guides covering Blackball rules, equipment, players and international competition, as well as plenty from the Championships themselves.
Next up, we'll take a proper look at Blackball Rules vs International Rules and the differences UK pool players are most likely to encounter.
The final word on Blackball rules
Blackball becomes much easier to understand once you get past the terminology.
Remember the basics: the table is open after the break, groups are established through a legal normal shot, a foul gives the incoming player a free shot, and the black can only be legally potted once your own group has been cleared.
The finer details are where things get interesting, and those are exactly the situations we'll be exploring in the rest of the Chalky Trousers Blackball series.
Rules can be updated and individual competitions may have additional regulations. For competitive play, always check the current official rules and event regulations.